CA2765852C - Compositions comprising finafloxacin and methods for treating ophthalmic, otic, or nasal infections - Google Patents
Compositions comprising finafloxacin and methods for treating ophthalmic, otic, or nasal infections Download PDFInfo
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- CA2765852C CA2765852C CA2765852A CA2765852A CA2765852C CA 2765852 C CA2765852 C CA 2765852C CA 2765852 A CA2765852 A CA 2765852A CA 2765852 A CA2765852 A CA 2765852A CA 2765852 C CA2765852 C CA 2765852C
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- CA
- Canada
- Prior art keywords
- composition according
- finafloxacin
- topical composition
- compositions
- glucocorticoid
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- 239000000203 mixture Substances 0.000 title claims abstract description 150
- FYMHQCNFKNMJAV-HOTGVXAUSA-N finafloxacin Chemical compound C12=C(C#N)C(N3C[C@@H]4OCCN[C@H]4C3)=C(F)C=C2C(=O)C(C(=O)O)=CN1C1CC1 FYMHQCNFKNMJAV-HOTGVXAUSA-N 0.000 title claims abstract description 72
- 229960002839 finafloxacin Drugs 0.000 title claims abstract description 69
- 208000015181 infectious disease Diseases 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title abstract description 23
- 238000011282 treatment Methods 0.000 claims abstract description 20
- 230000000699 topical effect Effects 0.000 claims description 38
- 239000003862 glucocorticoid Substances 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000546 pharmaceutical excipient Substances 0.000 claims description 11
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 229940121363 anti-inflammatory agent Drugs 0.000 claims description 8
- 239000002260 anti-inflammatory agent Substances 0.000 claims description 8
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- MIXMJCQRHVAJIO-TZHJZOAOSA-N qk4dys664x Chemical compound O.C1([C@@H](F)C2)=CC(=O)C=C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2C[C@H]3OC(C)(C)O[C@@]3(C(=O)CO)[C@@]2(C)C[C@@H]1O.C1([C@@H](F)C2)=CC(=O)C=C[C@]1(C)[C@@H]1[C@@H]2[C@@H]2C[C@H]3OC(C)(C)O[C@@]3(C(=O)CO)[C@@]2(C)C[C@@H]1O MIXMJCQRHVAJIO-TZHJZOAOSA-N 0.000 claims description 2
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- 230000000845 anti-microbial effect Effects 0.000 abstract description 14
- MYSWGUAQZAJSOK-UHFFFAOYSA-N ciprofloxacin Chemical compound C12=CC(N3CCNCC3)=C(F)C=C2C(=O)C(C(=O)O)=CN1C1CC1 MYSWGUAQZAJSOK-UHFFFAOYSA-N 0.000 description 46
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- UKLNMMHNWFDKNT-UHFFFAOYSA-M sodium chlorite Chemical compound [Na+].[O-]Cl=O UKLNMMHNWFDKNT-UHFFFAOYSA-M 0.000 description 1
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- 239000001509 sodium citrate Substances 0.000 description 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 description 1
- 229960001922 sodium perborate Drugs 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- YKLJGMBLPUQQOI-UHFFFAOYSA-M sodium;oxidooxy(oxo)borane Chemical compound [Na+].[O-]OB=O YKLJGMBLPUQQOI-UHFFFAOYSA-M 0.000 description 1
- 235000010199 sorbic acid Nutrition 0.000 description 1
- 239000004334 sorbic acid Substances 0.000 description 1
- 229940075582 sorbic acid Drugs 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 235000010356 sorbitol Nutrition 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000002294 steroidal antiinflammatory agent Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 229960000894 sulindac Drugs 0.000 description 1
- MLKXDPUZXIRXEP-MFOYZWKCSA-N sulindac Chemical compound CC1=C(CC(O)=O)C2=CC(F)=CC=C2\C1=C/C1=CC=C(S(C)=O)C=C1 MLKXDPUZXIRXEP-MFOYZWKCSA-N 0.000 description 1
- 229960004492 suprofen Drugs 0.000 description 1
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- 208000024891 symptom Diseases 0.000 description 1
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- 229960002871 tenoxicam Drugs 0.000 description 1
- WZWYJBNHTWCXIM-UHFFFAOYSA-N tenoxicam Chemical compound O=C1C=2SC=CC=2S(=O)(=O)N(C)C1=C(O)NC1=CC=CC=N1 WZWYJBNHTWCXIM-UHFFFAOYSA-N 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
- RTKIYNMVFMVABJ-UHFFFAOYSA-L thimerosal Chemical compound [Na+].CC[Hg]SC1=CC=CC=C1C([O-])=O RTKIYNMVFMVABJ-UHFFFAOYSA-L 0.000 description 1
- 229960004906 thiomersal Drugs 0.000 description 1
- NBOMNTLFRHMDEZ-UHFFFAOYSA-N thiosalicylic acid Chemical compound OC(=O)C1=CC=CC=C1S NBOMNTLFRHMDEZ-UHFFFAOYSA-N 0.000 description 1
- 229940103494 thiosalicylic acid Drugs 0.000 description 1
- 229960001017 tolmetin Drugs 0.000 description 1
- UPSPUYADGBWSHF-UHFFFAOYSA-N tolmetin Chemical compound C1=CC(C)=CC=C1C(=O)C1=CC=C(CC(O)=O)N1C UPSPUYADGBWSHF-UHFFFAOYSA-N 0.000 description 1
- 229950011536 torbafylline Drugs 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000583 toxicological profile Toxicity 0.000 description 1
- 231100000041 toxicology testing Toxicity 0.000 description 1
- 235000010487 tragacanth Nutrition 0.000 description 1
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Classifications
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- A61K31/5395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines having two or more nitrogen atoms in the same ring, e.g. oxadiazines
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- A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
Abstract
The present invention relates to methods for treating an ophthalmic, otic, or nasal infection comprising treating the infected tissue with a composition comprising finafloxacin or a finafloxacin derivative. The present invention also relates to antimicrobial compositions comprising finafloxacin or a finafloxacin derivative. The compositions are suitable for the treatment of ophthalmic, otic, or nasal infections.
Description
COMPOSITIONS COMPRISING FINAFLOXACIN AND
METHODS FOR TREATING OPHTHALMIC, OTIC, OR NASAL INFECTIONS
The present invention generally relates to methods for treating an ophthalmic, otic, or nasal disorder. The present invention specifically relates to treating an ophthalmic, otic, or nasal infection with a composition comprising finafloxacin or a finafloxacin derivative.
BACKGROUND OF THE INVENTION
Microbial resistance to conventional antimicrobial treatment is an ongoing concern to medical professionals. Until the problem of resistance is overcome, a steady supply of new treatments and therapies for treating microbial infections is required in order to blunt the effect of microbe mutations that render conventional therapies less effective or, in certain cases, ineffective. In particular, resistance to quirtolone antibiotics is becoming a concern.
Quinolone antibiotics are known to have desirable antimicrobial properties.
For example, quinolone compounds for use in the treatment of ophthalmic, otic, and nasal conditions are disclosed in U.S. Patent No. 6,716,830.
Finafloxacin has been described as useful in the treatment of H. pylori infections. Buissonniere et al., "Antimicrobial activity of a new jluoroquinolone, fIngfloxacin, against H. Pylori in comparison to levofloxacin" Helicobacter, Vol.
13(5):165, Oct. 2008; U.S. Patent No, 6,133,260 to Matzke et al. Ophthalmic, otic, and nasal applications of finafloxacin are not described.
To cite one of many applications, the use of compositions having antimicrobial properties is important for the treatment of ophthalmic infections such as conjunctivitis. Conjunctivitis can be caused by various kinds of microbes, with most cases being due to bacteria and/or viruses. Unfortunately, conjunctivitis symptoms are not specific to the etiology of the infectious agent and significant testing may be required to determine the causative agent or microbe. Care must be taken in selecting appropriate agents for treating conjunctivitis, given the sensitive tissues affected by the infection. In view of the above-recited difficulties in treatment, compositions for treating conjunctivitis are needed that have broad-spectrum antimicrobial properties, a benign toxicological profile, and/or characteristics that prevent the transmission of contagious infectious agents.
Otic infections such as acute otitis externa (AOE) and acute otitis media with tympanostomy tubes (AOMT) are preferably treated by topical antimicrobial compositions, as the use of oral antimicrobials carries the risk of systemic side effects, and can occasionally fail to eradicate such infections with the possible development of drug-resistant strains. Recent years have seen a steady increase in quinolone-resistant strains of Staphylococcus and Pseudomonas bacteria, the most common causes of otic infections. In some areas, more than half of Pseudomonas strains isolated from otic infections are quinolone resistant. See Ballenger's Otorhinolaryngology: Head and Neck Surgery, Snow, J. et al., page 194, (2009). In addition, the external ear is generally an acidic environment due to the presence of cerumen. There is accordingly a need for additional topical compositions for the treatment of otic infection that are efficacious at low pH.
METHODS FOR TREATING OPHTHALMIC, OTIC, OR NASAL INFECTIONS
The present invention generally relates to methods for treating an ophthalmic, otic, or nasal disorder. The present invention specifically relates to treating an ophthalmic, otic, or nasal infection with a composition comprising finafloxacin or a finafloxacin derivative.
BACKGROUND OF THE INVENTION
Microbial resistance to conventional antimicrobial treatment is an ongoing concern to medical professionals. Until the problem of resistance is overcome, a steady supply of new treatments and therapies for treating microbial infections is required in order to blunt the effect of microbe mutations that render conventional therapies less effective or, in certain cases, ineffective. In particular, resistance to quirtolone antibiotics is becoming a concern.
Quinolone antibiotics are known to have desirable antimicrobial properties.
For example, quinolone compounds for use in the treatment of ophthalmic, otic, and nasal conditions are disclosed in U.S. Patent No. 6,716,830.
Finafloxacin has been described as useful in the treatment of H. pylori infections. Buissonniere et al., "Antimicrobial activity of a new jluoroquinolone, fIngfloxacin, against H. Pylori in comparison to levofloxacin" Helicobacter, Vol.
13(5):165, Oct. 2008; U.S. Patent No, 6,133,260 to Matzke et al. Ophthalmic, otic, and nasal applications of finafloxacin are not described.
To cite one of many applications, the use of compositions having antimicrobial properties is important for the treatment of ophthalmic infections such as conjunctivitis. Conjunctivitis can be caused by various kinds of microbes, with most cases being due to bacteria and/or viruses. Unfortunately, conjunctivitis symptoms are not specific to the etiology of the infectious agent and significant testing may be required to determine the causative agent or microbe. Care must be taken in selecting appropriate agents for treating conjunctivitis, given the sensitive tissues affected by the infection. In view of the above-recited difficulties in treatment, compositions for treating conjunctivitis are needed that have broad-spectrum antimicrobial properties, a benign toxicological profile, and/or characteristics that prevent the transmission of contagious infectious agents.
Otic infections such as acute otitis externa (AOE) and acute otitis media with tympanostomy tubes (AOMT) are preferably treated by topical antimicrobial compositions, as the use of oral antimicrobials carries the risk of systemic side effects, and can occasionally fail to eradicate such infections with the possible development of drug-resistant strains. Recent years have seen a steady increase in quinolone-resistant strains of Staphylococcus and Pseudomonas bacteria, the most common causes of otic infections. In some areas, more than half of Pseudomonas strains isolated from otic infections are quinolone resistant. See Ballenger's Otorhinolaryngology: Head and Neck Surgery, Snow, J. et al., page 194, (2009). In addition, the external ear is generally an acidic environment due to the presence of cerumen. There is accordingly a need for additional topical compositions for the treatment of otic infection that are efficacious at low pH.
2 BRIEF SUMMARY OF THE INVENTION
The present invention relates to compositions for the treatment of ophthalmic, otic, and nasal disorders comprising finafloxacin or a pharmaceutically acceptable salt, derivative, enantiomer, or hydrate thereof. In preferred embodiments, such compositions are for the treatment of ophthalmic, otic, and nasal infections, particularly infections caused by various bacterial species. Preferred finafloxacin compositions have an acidic pH which provides for increased antimicrobial efficacy.
Additionally, the present invention relates to methods for treating an infected ophthalmic, otic, or nasal tissue comprising treating the infected tissue with a composition comprising finafloxacin.
The compositions and methods of the present invention are useful in the treatment of acute otic infections, particularly those of the external ear canal such as acute otitis externa (AOE) and acute otitis media with tympanostomy tubes (AOMT).
Due to the presence of cerumen, the external ear environment is generally of acidic pH. The present inventors have unexpectedly found that, when tested at acidic pH, compositions comprising finafloxacin are generally more efficacious than other quinolone compositions against microbes commonly found in otic infections.
Finafloxacin compositions of the present invention also have low potential for inner ear toxicity when used for the topical treatment of external ear infections.
The compositions and methods of the present invention are accordingly well suited for the topical treatment of otic infections.
Certain finafloxacin compositions provide enhanced antimicrobial activity and may be used to treat infections resulting from quinolone-resistant microbes.
Such enhanced activity is believed to result from a combination of the increased potency and better penetration characteristics of finafloxacin relative to other antibiotics.
Ophthalmic finafloxacin compositions are particularly well suited for the topical treatment of ophthalmic infection. Such compositions can be formulated at a neutral pH and retain their efficacy against common ophthalmic pathogens such as Staphylococcus aureus.
The foregoing brief summary broadly describes the features and technical advantages of certain embodiments of the present invention. Additional features and technical advantages will be described in the detailed description of the invention that follows. Novel features which are believed to be characteristic of the invention will
The present invention relates to compositions for the treatment of ophthalmic, otic, and nasal disorders comprising finafloxacin or a pharmaceutically acceptable salt, derivative, enantiomer, or hydrate thereof. In preferred embodiments, such compositions are for the treatment of ophthalmic, otic, and nasal infections, particularly infections caused by various bacterial species. Preferred finafloxacin compositions have an acidic pH which provides for increased antimicrobial efficacy.
Additionally, the present invention relates to methods for treating an infected ophthalmic, otic, or nasal tissue comprising treating the infected tissue with a composition comprising finafloxacin.
The compositions and methods of the present invention are useful in the treatment of acute otic infections, particularly those of the external ear canal such as acute otitis externa (AOE) and acute otitis media with tympanostomy tubes (AOMT).
Due to the presence of cerumen, the external ear environment is generally of acidic pH. The present inventors have unexpectedly found that, when tested at acidic pH, compositions comprising finafloxacin are generally more efficacious than other quinolone compositions against microbes commonly found in otic infections.
Finafloxacin compositions of the present invention also have low potential for inner ear toxicity when used for the topical treatment of external ear infections.
The compositions and methods of the present invention are accordingly well suited for the topical treatment of otic infections.
Certain finafloxacin compositions provide enhanced antimicrobial activity and may be used to treat infections resulting from quinolone-resistant microbes.
Such enhanced activity is believed to result from a combination of the increased potency and better penetration characteristics of finafloxacin relative to other antibiotics.
Ophthalmic finafloxacin compositions are particularly well suited for the topical treatment of ophthalmic infection. Such compositions can be formulated at a neutral pH and retain their efficacy against common ophthalmic pathogens such as Staphylococcus aureus.
The foregoing brief summary broadly describes the features and technical advantages of certain embodiments of the present invention. Additional features and technical advantages will be described in the detailed description of the invention that follows. Novel features which are believed to be characteristic of the invention will
3 be better understood from the detailed description of the invention when considered in connection with any accompanying figures. However, figures provided herein are intended to help illustrate the invention or assist with developing an understanding of the invention, and are not intended to be definitions of the invention's scope.
4 BRIEF DESCRIPTION OF THE DRAWINGS
A more complete understanding of the present invention and the advantages thereof may be acquired by referring to the following description, taken in conjunction with the figures of the accompanying drawing in which like reference numbers indicate like features and wherein:
FIGURES l a- 1 d are bar charts presenting the results of a guinea pig model of otic infection;
to FIGURE 2 is a graph showing comparative corneal perfusion data for several quinolone antimicrobials;
FIGURE 3 presents the results of an ocular pharmacokinetic study of finafloxacin and ciprofloxacin in corneal tissue following topical administration;
FIGURE 4 presents the results of ocular pharmacokinetic study of finafloxacin and ciprofloxacin in aqueous humor following topical administration; and FIGURE 5 is a chart presenting the results of finafloxacin and ciprofloxacin compositions in a rabbit keratitis model study using Staphylococcus aureus.
A more complete understanding of the present invention and the advantages thereof may be acquired by referring to the following description, taken in conjunction with the figures of the accompanying drawing in which like reference numbers indicate like features and wherein:
FIGURES l a- 1 d are bar charts presenting the results of a guinea pig model of otic infection;
to FIGURE 2 is a graph showing comparative corneal perfusion data for several quinolone antimicrobials;
FIGURE 3 presents the results of an ocular pharmacokinetic study of finafloxacin and ciprofloxacin in corneal tissue following topical administration;
FIGURE 4 presents the results of ocular pharmacokinetic study of finafloxacin and ciprofloxacin in aqueous humor following topical administration; and FIGURE 5 is a chart presenting the results of finafloxacin and ciprofloxacin compositions in a rabbit keratitis model study using Staphylococcus aureus.
5 DETAILED DESCRIPTION OF THE INVENTION
The compositions of the present invention comprise finalloxacin or a pharmaceutically acceptable salt, derivative, enantiomer, or hydrate thereof.
Finafloxacin (8-cyano-l-cyclopropy1-6-fluoro-7-KilaS, 7aS)-hexahydropyrrolo [3,4-bj-1 ,4-oxazin-6(2H)-y1]-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid) has the following structure:
=
The compositions of the present invention comprise finalloxacin or a pharmaceutically acceptable salt, derivative, enantiomer, or hydrate thereof.
Finafloxacin (8-cyano-l-cyclopropy1-6-fluoro-7-KilaS, 7aS)-hexahydropyrrolo [3,4-bj-1 ,4-oxazin-6(2H)-y1]-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid) has the following structure:
=
6=H
1:D4 00 A preferred salt for use in embodiments of the present invention is finatioxacin monohydrochloride. Diasteromerically and enantiomerically pure finailoxacin is also preferred for use in embodiments of the present invention. As used herein, the term "fmafioxacin" is intended to encompass fmafloxacin and its pharmaceutically acceptable salts, derivatives, aumtiomers, or hydrates. The phrase is "pharmaceutically acceptable" is art-recognized and refers to compositions, polymers and other materials and/or dosage forms which are suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio as determined by one of ordinary skill in the art.
Finafloxacin and derivatives thereof can be synthesized according to the methods described in U.S. Patent No. 6,133,260 to Matzke et al.
The compositions of the invention are particularly directed toward treating mammalian and human subjects having or at risk of having a microbial tissue infection. Microbial tissue infections that may be treated or prevented in accord with the method of the present invention are referred to in J. P. Sanford at al., "The Sanford Guide to Antimicrobial Therapy 2007" 37th Edition (Antimicrobial Therapy, Inc.).
Particular microbial tissue infections that may be treatable by embodiments of the present invention include those infections caused by bacteria, protozoa, fungi, yeast, spores, and parasites. The present invention is also particularly directed to antimicrobial compositions for and methods of treating ophthalmic, otic, and nasal/sinus infections.
Certain embodiments of the present invention are particularly useful for treating ophthalmic tissue infections. Examples of ophthalmic conditions that may be treated using compositions and methods of the present invention include conjunctivitis, keratitis, blepharitis, dacyrocystitis, hordeolum and corneal ulcers. The methods and compositions of the invention may also be used prophylactically in various ophthalmic surgical procedures that create a risk of infection.
Otic and nasal/sinus tissue infections may also be treated by embodiments of the present invention. Examples of otic conditions that may be treated with compositions and methods of the present invention include acute otitis externa and otitis media (where the tympanic membrane has ruptured or tympanostomy tubes have been implanted). Examples of nasal/sinus conditions that may be treated with compositions and methods of the present invention include rhinitis, sinusitis, nasal carriage and situations where the nasal or sinus tissues are affected by surgery.
Embodiments of the present invention may also be used prophylactically to prevent infection of a tissue by an infectious agent. In such embodiments, a tissue at risk of infection is contacted with a composition of the present invention.
In particular embodiments, a composition of the present invention is administered once a day. However, the compositions of the present invention may also be formulated for administration at any frequency of administration, including once a week, once every 5 days, once every 3 days, once every 2 days, twice a day, three times a day, four times a day, five times a day, six times a day, eight times a day, every hour, or any greater frequency. Such dosing frequency is also maintained for a varying duration of time depending on the therapeutic regimen. The duration of a particular therapeutic regimen may vary from one-time dosing to a regimen that extends for months or years. One of ordinary skill in the art would be familiar with determining a therapeutic regimen for a specific indication that incorporates a pharmaceutically effective amount of finafloxacin or a composition thereof.
The phrase "pharmaceutically effective amount" is an art-recognized term, and refers to an amount of an agent that, when incorporated into a pharmaceutical composition of the present invention, produces some desired effect at a reasonable benefit/risk ratio
1:D4 00 A preferred salt for use in embodiments of the present invention is finatioxacin monohydrochloride. Diasteromerically and enantiomerically pure finailoxacin is also preferred for use in embodiments of the present invention. As used herein, the term "fmafioxacin" is intended to encompass fmafloxacin and its pharmaceutically acceptable salts, derivatives, aumtiomers, or hydrates. The phrase is "pharmaceutically acceptable" is art-recognized and refers to compositions, polymers and other materials and/or dosage forms which are suitable for use in contact with the tissues of human beings and animals without excessive toxicity, irritation, allergic response, or other problem or complication, commensurate with a reasonable benefit/risk ratio as determined by one of ordinary skill in the art.
Finafloxacin and derivatives thereof can be synthesized according to the methods described in U.S. Patent No. 6,133,260 to Matzke et al.
The compositions of the invention are particularly directed toward treating mammalian and human subjects having or at risk of having a microbial tissue infection. Microbial tissue infections that may be treated or prevented in accord with the method of the present invention are referred to in J. P. Sanford at al., "The Sanford Guide to Antimicrobial Therapy 2007" 37th Edition (Antimicrobial Therapy, Inc.).
Particular microbial tissue infections that may be treatable by embodiments of the present invention include those infections caused by bacteria, protozoa, fungi, yeast, spores, and parasites. The present invention is also particularly directed to antimicrobial compositions for and methods of treating ophthalmic, otic, and nasal/sinus infections.
Certain embodiments of the present invention are particularly useful for treating ophthalmic tissue infections. Examples of ophthalmic conditions that may be treated using compositions and methods of the present invention include conjunctivitis, keratitis, blepharitis, dacyrocystitis, hordeolum and corneal ulcers. The methods and compositions of the invention may also be used prophylactically in various ophthalmic surgical procedures that create a risk of infection.
Otic and nasal/sinus tissue infections may also be treated by embodiments of the present invention. Examples of otic conditions that may be treated with compositions and methods of the present invention include acute otitis externa and otitis media (where the tympanic membrane has ruptured or tympanostomy tubes have been implanted). Examples of nasal/sinus conditions that may be treated with compositions and methods of the present invention include rhinitis, sinusitis, nasal carriage and situations where the nasal or sinus tissues are affected by surgery.
Embodiments of the present invention may also be used prophylactically to prevent infection of a tissue by an infectious agent. In such embodiments, a tissue at risk of infection is contacted with a composition of the present invention.
In particular embodiments, a composition of the present invention is administered once a day. However, the compositions of the present invention may also be formulated for administration at any frequency of administration, including once a week, once every 5 days, once every 3 days, once every 2 days, twice a day, three times a day, four times a day, five times a day, six times a day, eight times a day, every hour, or any greater frequency. Such dosing frequency is also maintained for a varying duration of time depending on the therapeutic regimen. The duration of a particular therapeutic regimen may vary from one-time dosing to a regimen that extends for months or years. One of ordinary skill in the art would be familiar with determining a therapeutic regimen for a specific indication that incorporates a pharmaceutically effective amount of finafloxacin or a composition thereof.
The phrase "pharmaceutically effective amount" is an art-recognized term, and refers to an amount of an agent that, when incorporated into a pharmaceutical composition of the present invention, produces some desired effect at a reasonable benefit/risk ratio
7 applicable to any medical treatment. The effective amount may vary depending on such factors as the disease or infectious agent being treated, the particular composition being administered, or the severity of the disease or infection agent.
In addition to finafloxacin, the compositions of the present invention optionally comprise one or more excipients. Excipients commonly used in pharmaceutical compositions include, but are not limited to, tonicity agents, preservatives, chelating agents, buffering agents, surfactants and antioxidants. Other excipients comprise solubilizing agents, stabilizing agents, comfort-enhancing agents, polymers, emollients, pH-adjusting agents and/or lubricants. Any of a variety of excipients may be used in compositions of the present invention including water, mixtures of water and water-miscible solvents, such as Cl -C7-alkanols, vegetable oils or mineral oils comprising from 0.5 to 5% non-toxic water-soluble polymers, natural products, such as alginates, pectins, tragacanth, karaya gum, xanthan gum, carrageenin, agar and acacia, starch derivatives, such as starch acetate and hydroxypropyl starch, and also other synthetic products such as polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl methyl ether, polyethylene oxide, preferably cross-linked polyacrylic acid and mixtures of these products. In preferred embodiments, the concentration of the excipient(s) are, typically, from 1 to 100 times the concentration of fmafloxacin and the excipient(s) are selected on the basis of their inertness towards finafloxacin.
Suitable tonicity-adjusting agents include, but are not limited to, mannitol, sodium chloride, glycerin, sorbitol and the like. Suitable buffering agents include, but are not limited to, phosphates, borates, acetates and the like. Suitable surfactants include, but are not limited to, ionic and nonionic surfactants, though nonionic surfactants are preferred, RLM 100, POE 20 cetylstearyl ethers such as Procol and poloxamers such as Pluronic F68. Suitable antioxidants include, but are not limited to, sulfites, ascorbates, butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT).
The compositions set forth herein may comprise one or more preservatives.
Examples of such preservatives include p-hydroxybenzoic acid ester, alkyl-mercury salts of thiosalicylic acid, such as thiomersal, phenylmercuric nitrate, phenylmercuric acetate, phenylmercuric borate, sodium perborate, sodium chlorite, parabens such as methylparaben or propylparaben, alcohols such as chlorobutanol, benzyl alcohol or phenyl ethanol, guanidine derivatives such as polyhexamethylene biguanide, sodium
In addition to finafloxacin, the compositions of the present invention optionally comprise one or more excipients. Excipients commonly used in pharmaceutical compositions include, but are not limited to, tonicity agents, preservatives, chelating agents, buffering agents, surfactants and antioxidants. Other excipients comprise solubilizing agents, stabilizing agents, comfort-enhancing agents, polymers, emollients, pH-adjusting agents and/or lubricants. Any of a variety of excipients may be used in compositions of the present invention including water, mixtures of water and water-miscible solvents, such as Cl -C7-alkanols, vegetable oils or mineral oils comprising from 0.5 to 5% non-toxic water-soluble polymers, natural products, such as alginates, pectins, tragacanth, karaya gum, xanthan gum, carrageenin, agar and acacia, starch derivatives, such as starch acetate and hydroxypropyl starch, and also other synthetic products such as polyvinyl alcohol, polyvinylpyrrolidone, polyvinyl methyl ether, polyethylene oxide, preferably cross-linked polyacrylic acid and mixtures of these products. In preferred embodiments, the concentration of the excipient(s) are, typically, from 1 to 100 times the concentration of fmafloxacin and the excipient(s) are selected on the basis of their inertness towards finafloxacin.
Suitable tonicity-adjusting agents include, but are not limited to, mannitol, sodium chloride, glycerin, sorbitol and the like. Suitable buffering agents include, but are not limited to, phosphates, borates, acetates and the like. Suitable surfactants include, but are not limited to, ionic and nonionic surfactants, though nonionic surfactants are preferred, RLM 100, POE 20 cetylstearyl ethers such as Procol and poloxamers such as Pluronic F68. Suitable antioxidants include, but are not limited to, sulfites, ascorbates, butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT).
The compositions set forth herein may comprise one or more preservatives.
Examples of such preservatives include p-hydroxybenzoic acid ester, alkyl-mercury salts of thiosalicylic acid, such as thiomersal, phenylmercuric nitrate, phenylmercuric acetate, phenylmercuric borate, sodium perborate, sodium chlorite, parabens such as methylparaben or propylparaben, alcohols such as chlorobutanol, benzyl alcohol or phenyl ethanol, guanidine derivatives such as polyhexamethylene biguanide, sodium
8 perborate, or sorbic acid. In certain embodiments, the composition may be self-preserved that no preservation agent is required.
For use in sinus applications, compositions may be used that comprise excipients suitable for aerosol formation using nebulizers or other such devices well known to those of skill in the art.
Some compositions of the present invention are ophthalmically suitable for application to a subject's eyes. For ophthalmic administration, the composition may to be a solution, a suspension, a gel, or an ointment. In preferred aspects, compositions that include finafloxacin will be formulated for topical application to the eye in aqueous solution in the form of drops. The term "aqueous" typically denotes an aqueous composition wherein the excipient is >50%, more preferably >75% and in particular >90% by weight water. These drops may be delivered from a single dose ampoule which may preferably be sterile and thus render bacteriostatic components of the composition unnecessary. Alternatively, the drops may be delivered from a multi-dose bottle which may preferably comprise a device which extracts any preservative from the composition as it is delivered, such devices being known in the art.
In other aspects, components of the invention may be delivered to the eye as a concentrated gel or a similar vehicle, or as dissolvable inserts that are placed beneath the eyelids. In yet other aspects, components of the invention may be delivered to the eye as ointment, water-in-oil and oil-in-water emulsions.
For topical compositions to the eye, the compositions are preferably isotonic, or slightly hypotonic in order to combat any hypertonicity of tears caused by evaporation and/or disease. This may require a tonicity agent to bring the osmolality of the composition to a level at or near 210-320 milliosmoles per kilogram (mOsin/kg). The pH of the solution may be in an ophthalmic acceptable range of 3.0 to 8Ø The compositions of the present invention generally have an osmolality in the range of 220-320 mOsm/kg, and preferably have an osmolality in the range of 300 mOsm/kg. The ophthalmic compositions will generally be formulated as sterile aqueous solutions.
In certain embodiments, finafloxacin is formulated in a composition that comprises one or more tear substitutes. A variety of tear substitutes are known in the art and include, but are not limited to: monomeric polyols, such as, glycerol,
For use in sinus applications, compositions may be used that comprise excipients suitable for aerosol formation using nebulizers or other such devices well known to those of skill in the art.
Some compositions of the present invention are ophthalmically suitable for application to a subject's eyes. For ophthalmic administration, the composition may to be a solution, a suspension, a gel, or an ointment. In preferred aspects, compositions that include finafloxacin will be formulated for topical application to the eye in aqueous solution in the form of drops. The term "aqueous" typically denotes an aqueous composition wherein the excipient is >50%, more preferably >75% and in particular >90% by weight water. These drops may be delivered from a single dose ampoule which may preferably be sterile and thus render bacteriostatic components of the composition unnecessary. Alternatively, the drops may be delivered from a multi-dose bottle which may preferably comprise a device which extracts any preservative from the composition as it is delivered, such devices being known in the art.
In other aspects, components of the invention may be delivered to the eye as a concentrated gel or a similar vehicle, or as dissolvable inserts that are placed beneath the eyelids. In yet other aspects, components of the invention may be delivered to the eye as ointment, water-in-oil and oil-in-water emulsions.
For topical compositions to the eye, the compositions are preferably isotonic, or slightly hypotonic in order to combat any hypertonicity of tears caused by evaporation and/or disease. This may require a tonicity agent to bring the osmolality of the composition to a level at or near 210-320 milliosmoles per kilogram (mOsin/kg). The pH of the solution may be in an ophthalmic acceptable range of 3.0 to 8Ø The compositions of the present invention generally have an osmolality in the range of 220-320 mOsm/kg, and preferably have an osmolality in the range of 300 mOsm/kg. The ophthalmic compositions will generally be formulated as sterile aqueous solutions.
In certain embodiments, finafloxacin is formulated in a composition that comprises one or more tear substitutes. A variety of tear substitutes are known in the art and include, but are not limited to: monomeric polyols, such as, glycerol,
9 propylene glycol, and ethylene glycol; polymeric polyols such as polyethylene glycol;
cellulose esters such hydroxypropylmethyl cellulose, carboxy methylcellulose sodium and hydroxy propylcellulose; dextrans such as dextran 70; vinyl polymers, such as polyvinyl alcohol; and carbomers, such as carbomer 934P, carbomer 941, carbomer 940 and carbomer 974P. Certain compositions of the present invention may be used with contact lenses or other ophthalmic products.
In some embodiments, the compositions set forth herein have a viscosity of 0.5-100 cps, preferably 0.5-50 cps, and most preferably 1-20 cps. This relatively low viscosity insures that the product is comfortable, does not cause blurring, and is easily processed during manufacturing, transfer and filling operations.
To effectively treat various microbial infections and to minimize side-effects, the antimicrobial activity of a composition should be maximized so that a minimum amount of active ingredient is used. The activity of the antimicrobial compositions of the present invention is generally the result of the antimicrobial agent itself; the composition components other than finafloxacin normally cause little effect.
It is also contemplated that the concentrations of the ingredients comprising the compositions of the present invention can vary. In preferred embodiments, finafloxacin is present in ophthalmic compositions at a concentration of about 0.1% to 1.0% w/v. Particularly preferred embodiments have a finafloxacin concentration of 0.1% to 0.5% w/v, and most preferred are embodiments having a finafloxacin concentration of about 0.3% to 0.4% w/v. A person of ordinary skill in the art would understand that the concentrations can vary depending on the addition, substitution, and/or subtraction of ingredients in a given composition.
Preferred compositions are prepared using a buffering system that maintains the composition at a pH of about 3 to a pH of about 8.0 and preferably from 5.0 to 7.5. Particularly preferred otic compositions have a pH of 5.0 to 6.0 and most preferred otic compositions have a pH of about 5.9. Particularly preferred ophthalmic compositions have a pH of 6.0 to 8.0 and most preferred ophthalmic compositions have a pH of 7.5 to 8Ø In certain embodiments, topical compositions (particularly topical ophthalmic compositions, as noted above) are preferred which have a physiological pH matching the tissue to which the composition will be applied or dispensed.
In the methods set forth herein, administration to a subject of a pharmaceutically effective amount of a composition that includes finafloxacin may be by any method known to those of ordinary skill in the art.
For example, the composition may be administered locally, topically, intradermally, intralesionally, intranasally, subcutaneously, orally, by inhalation, by injection, by localized perfusion bathing target cells directly, via a catheter, or via lavage.
In particular embodiments, the composition is administered topically to an ocular surface. Regarding ophthalmic administration, it is contemplated that all local routes to the eye may be used, including topical, subconjunctival, periocular, retrobulbar, subtenon, intraocular, subretinal, posterior juxtascleral, and suprachoroidal administration.
The compositions of the present invention may also comprise an anti-inflammatory agent. The compositions of the present invention may also contain one or more anti-inflammatory agents. The anti-inflammatory agents utilized in the present invention are broadly classified as steroidal or non-steroidal. The preferred steroidal anti-inflammatory agents are glucocorticoids. Glucocorticoids for ophthalmic, otic, or nasal use include dexamethasone, loteprednol, rimexolone, prednisolone, fluorometholone, hydrocortisone, mometasone, fluticasone, beclomethasone, flunisolide, triamcinolone and budesonide.
Non-steroidal anti-inflammatory agents are: prostaglandin H synthetase inhibitors (Cox I or Cox II), also referred to as cyclooxygenase type I and type II
inhibitors, such as diclofenac, flurbiprofen, ketorolac, suprofen, nepafenac, amfenac, indomethacin, naproxen, ibuprofen, bromfenac, ketoprofen, meclofenamate, piroxicam, sulindac, mefanamic acid, diflusinal, oxaprozin, tolmetin, fenoprofen, benoxaprofen, nabumetome, etodolac, phenylbutazone, aspirin, oxyphenbutazone, NCX-4016, HCT-1026, NCX-284, NCX-456, tenoxicam and carprofen;
cyclooxygenase type II selective inhibitors, such as NS-398, vioxx, celecoxib, P54, etodolac, L-804600 and S-33516; PAF antagonists, such as SR-27417, A-137491, ABT-299, apafant, bepafant, minopafant, E-6123, BN-50727, nupafant and modipafant; PDE IV inhibitors, such as ariflo, torbafylline, rolipram, filaminast, piclamilast, cipamfylline, CG-1088, V-11294A, CT-2820, PD-168787, CP-293121, DWP-205297, CP-220629, SH-636, BAY-19-8004, and roflumilast; inhibitors of cytolcine production, such as inhibitors of the NF.kappa.B transcription factor; or other anti-inflammatory agents known to those skilled in the art.
The concentrations of the anti-inflammatory agents contained in the compositions of the present invention will vary based on the agent or agents selected and the type of inflammation being treated. The concentrations will be sufficient to reduce inflammation in the targeted ophthalmic, otic or nasal tissues following topical application of the compositions to those tissues. Such an amount is referred to herein as "an anti-inflammatory effective amount". The compositions of the present invention will typically contain one or more anti-inflammatory agents in an amount of from about 0.01 to about 1.0 wt. %.
Various otic administration techniques are also contemplated. In particular embodiments, the composition may be delivered directly to the ear canal (for example: topical otic drops or ointments; slow release devices in the ear or implanted adjacent to the ear). Local administration routes include otic intramuscular, intratympanic cavity and intracochlear injection routes for the compositions.
It is further contemplated that certain compositions of the invention may be formulated in intraotic inserts or implant devices. For instance, delivery of the compositions can be accomplished by endoscopic assisted (including laser-assisted endoscopy to make the incision into the tympanic membrane) injection into the tympanic cavity as set forth, for example, in Tsue et al., Amer. J. Otolaryngology, Vol. 16(3):158-164, 1995;
Silverstein et al., Ear Nose Throat, Vol. 76:674-678, 1997; Silverstein et al., Otolaryngol Head Neck Surg, Vol. 120:649-655, 1999. Local administration can also be achieved by injection through the tympanic membrane using a fine (EMG
recording) needle, through use of an indwelling catheter placed through a myringotomy incision, and injection or infusion through the Eustachian tube by means of a small tubal catheter. Furthermore, the compositions can be administered to the inner ear by placement of gelfoam or similar absorbent and adherent product soaked with the compositions against the window membrane of the middle/inner ear or adjacent structure with due discretion and caution by a skilled clinician.
Various other devices can be used to deliver the compositions to the affected ear compartment;
for example, via catheter or as exemplified in U.S. Patent No. 5,476,446 which provides a multi-functional apparatus specifically designed for use in treating and/or diagnosing the inner ear of the human subject. Also see U.S. Patent No.
6,653,279 for other devices for this purpose.
Administration of the compositions described herein for the treatment of nasal infection can be via a number of methods known to those of skill in the art.
For example, such compositions can be administered in droplet form or by aerosol formation.
EXAMPLES
Examples 1-7 below were prepared according to embodiments of the present invention.
Ingredient % w/v Finafloxacin 0.1 to 1.0 Sodium Acetate 0.03 Acetic Acid 0.04 Mannitol 4.60 EDTA 0.05 Purified Water q.s. 100%
Ingredient (1/0 w /v Finafloxacin 0.10 to 1.0 Citric acid 0.2 Sodium citrate 0.1 Sodium chloride 0.7*
Sodium hydroxide/HCL Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafloxacin 0.10 to 1.0 Boric acid 1.0 Mannitol 3.0*
Tromethamine/HCL Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafioxacin 0.10 to 1.0 Boric acid 1.0 Mannitol 3.0*
Hydroxyethyl cellulose 0.5 Tromethamine/HCL Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafloxacin 0.10 to 1.0 Boric acid 1.0 Mannitol 3.0*
Carbopol 0.3 Tromethamine/HCL Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafloxacin 0.33 Magnesium Chloride (hexahydrate) 0.3 Sodium Acetate (trihydmte) 0.68 Mannitol 2.5 Benzalkonium Chloride 0.01 Sodium Hydroxide/Hydrochloric Acid Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafloxacin 0.10 to 1.0 Zinc chloride 0.3-1.0 Sodium phosphate (anhydrous) 0.3-0.7 Sodium chloride 0.7*
Sodium hydroxide/HCL Adjust pi!
Purified Water q.s. 100%
*osmolality adjusted trern 200 to 350 in0810/kg EXAMPLE 8 ¨ In Vitro Antimicrobial Efficacy Studies A finafloxacin composition at pH 5.8 was compared to ciprofloxacin (pH 5.8) and ofloxacin (pH 5.8 and pH 7) compositions using standard in vitro antimicrobial susceptibility tests (M07-08 Methods for Dilution Antimicrobial Susceptibility. Tests for Bacteria that Grow Aerobically; Approved Standard-Eighth Edition (Jan 2009, Clinical and Laboratory Standards Institute)).
Minimum inhibitory concentrations (MICR) were determined using Gram-positive and Gram-negative test organisms commonly found in otic and ophthalmic infections.
The NCR) was the lowest concentration of antibiotic that prevented growth of the test organism, as determined visually by a lack of turbidity.
70 The results of the experiment are presented below in TABLE 1 (Grarn-positive organisms) and TABLE 2 (Gram-negative organisms). The finafloxacin compositions CA 02 7 65 852 2 011 ¨12 ¨1 6 showed lower MIC50 concentrations for all tested Gram-positive organisms compared to the ciprofloxacin and ofloxacin compositions.
TABLE 1 - Gram Positive Bacteria Finafloxacin Ciprofloxacin Ofloxacin Ofloxacin Organism at pH5.8 at pH 5.8 at pH 5.8 at pH 7 MIC5o (i.tg/mL) MICR) (.tg/mL) MIC50 (pg/mL) MICfo (itg/mI4 Staphylococcus aureus 4 128 64 32 ¨ Ciprofloxacin resistant (N=12) Staphylococcus aureus 0.016 1 1 0.25 ¨ Ciprofloxacin sensitive (N=8) Staphylococcus 2 128 32 16 epidermidis ¨
Ciprofloxacin resistant (N=12_ Staphylococcus 0.016 0.5 1 0.25 epidermidis ¨
Ciprofloxacin sensitive (N=8) Streptococcus 0.25 1 2 1 pneumonia (N---10) Enterococcus faecalis 8 128 16 128 (N=10) TABLE 2 - Gram Negative Bacteria Finafloxacin at Ciprofloxacin Ofloxacin at Ofloxacin at Organism 015.8 at pH 5.8 pfl 5.8 pH 7 MICso Wimp MIC50 (H/mL) MICR) ( g/m1_,) MIC50 (H/mL) Pseudomonas 16 64 256 64 aeruginosa ¨
Ciprofloxacin resistant (N=11) Pseudomonas 1 1 4 2 aeruginosa¨
Ciprofloxacin sensitive (N=14) Pseudomonas otitidis 0.125 0.25 1 0.25 (N=10) Haemophilus influenzae 0.008 0.016 0.031 0.031 (N=10) Escherichia colt (N=10) 4 256 512 16 Proteus mirabilis 0.25 0.125 0.5 0.125 (N=10) EXAMPLE 9 -In vivo Acute Otitis Externa (AOE) Model Finafloxacin test compositions (0.3%, 0.03%, and 0.003%) were compared to ofloxacin (0.3% and 0.03%) and ciprofloxacin compositions (CILOXAN , Alcon Laboratories, Inc (0.3% ciprofloxacin hydrochloride), 0.03%, and 0.003%) in a guinea pig model of acute otitis externa (AOE) using Pseudomonas aeruginosa. Guinea pig ears were slightly abraded and 200 ul of bacterial culture (108 CFU) of P.
aeruginosa were instilled into each ear. Ears were lavaged with saline and plated onto Pseudomonas isolation media. FIGURES la-id summarize the results of these studies.
As shown in FIGURE la, a 0.3% composition of finafloxacin resulted in almost complete eradication of Pseudomonas using two separate doses of test compostion. Lower concentration finafloxacin compositions (0.03% and 0.003%) still achieved very substantial 5-6 log reductions of Pseudomonas in the model. In the tests summarized in FIGURE la, finafloxacin performed as well as ciprofloxacin.
Finafloxacin was also compared to ofloxacin and ciprofloxacin compositions in single dose studies. FIGURE lb shows that a 0.3% finafloxacin composition resulted in almost complete eradication of Pseudomonas in the single dose study. Using a lower concentration composition (0.03%, shown in FIGURE lc) finafloxacin achieved a log CFU reduction in the single dose study. In this study, the finafloxacin composition performed as well as the ciprofloxacin composition and better than the ofloxacin composition. FIGURE ld demonstrates that the use of preservative (BAC) in 0.03% and 0.3% finafloxacin compositions does not affect the efficacy of finafloxacin against Pseudomonas compared to self-preserved compositions.
EXAMPLE 10- Ocular Pharmacokinetic Studies FIGURE 2 presents comparative corneal perfusion data for several quinolone antimicrobials (including finafloxacin) using an ex vivo model. 0.1 mM test solutions at pH 7.3 of four quinolone antimicrobials were compared in the model. As shown in FIGURE 2, the finafloxacin test composition has better corneal perfusion properties than the ciprofloxacin test composition and demonstrates less perfusion relative to the ofloxacin test composition.
FIGURES 3 and 4 present the results of ocular pharmacokinetic studies following topical administration of finafloxacin and ciprofloxacin compositions. The studies utilized New Zealand white rabbits, and 45 1.t1 of 0.3% test composition was instilled bilaterally. As shown in FIGURES 3 and 4, respectively, corneal stroma and aqueous humor tissue concentrations of both finafloxacin and ciprofloxacin were comparable at later time points, with the ciprofloxacin composition resulting in greater concentrations immediately following instillation.
EXAMPLE 11 - In vivo Keratitis Study Two 0.33% finafloxacin ophthalmic compositions with different buffer and pH characteristics were compared to CILOXAN in a rabbit keratitis model. New Zealand white rabbits received a corneal injection of 100 CFU of Staphylococcus aureus. The rabbits were treated topically with 45 Ill of the test composition once per hour starting 4 hours post-infection (6 treatments total). Corneas were harvested and cultured for viable cells 1 hour after fmal test treatment. As shown in FIGURE
5, both fmafloxacin compositions demonstrated Staphococcus aureus log reductions in the keratitis model similar to that of the CILOXAN composition. In a similar test using Psuedomonas aeruginosa, finafloxacin compositions demonstrated inferior Psuedomonas CFU reductions compared to CILOXAN .
73498-316(S) EXAMPLE 12¨ in vivo Ototexicity Study TABLE 3 below presents the results of toxicity testing performed in two animals models (chinchilla and rabbit). The tested finafloxacin compositions did not demonstrate inner or outer ear irritation in the animal models utilized.
Species Posology Treatment Groups Results Chinchilla 0.5 mL single = Vehicle pH 5.5 (no Mg or Zn) No indications dose with 72 hour = Vehicle with 1).13% ZnCl2 of inner ear extendedtoxicity in any = 0.3% Finafloxacin and observations = vehicle for 0.13%ZnC12 finafloxacin = Vehicle with 0.13% MgC12 groups = 0.3% Finafloxacin with 0.13%
MgCl2 Rabbit 0.2 mL bid for 7 = saline No indications days followed by = Vehicle pH 5.7(0.3% Mg and of significant 7 day observationsouter ear BAC in all) irritation with = Vehicle pH 7.5 finafloxacin = 0.3% Finafloxacin pH 5.7 = 0.3% Finafloxacin pH 7.5 = 0.6% Finafloxacin pH 7.5 = 1.0% Finafloxacin pH 7.5 The present invention and its embodiments have been described in detail.
to However, the scope of the present invention is not intended to be limited to the particular embodiments of any process, manufacture, composition of matter, compounds, means, methods, and/or steps described in the specification. One of ordinary skill in the art will readily appreciate from the disclosure that later modifications, substitutions, and/or variations performing substantially the same function or achieving substantially the same result as embodiments described herein may be utilized according to such related embodiments of the present invention.
Thus, the following claims are intended to encompass within their scope modifications, substitutions, and variations to processes, manufactures, compositions of matter, compounds, means, methods, and/or steps disclosed herein.
cellulose esters such hydroxypropylmethyl cellulose, carboxy methylcellulose sodium and hydroxy propylcellulose; dextrans such as dextran 70; vinyl polymers, such as polyvinyl alcohol; and carbomers, such as carbomer 934P, carbomer 941, carbomer 940 and carbomer 974P. Certain compositions of the present invention may be used with contact lenses or other ophthalmic products.
In some embodiments, the compositions set forth herein have a viscosity of 0.5-100 cps, preferably 0.5-50 cps, and most preferably 1-20 cps. This relatively low viscosity insures that the product is comfortable, does not cause blurring, and is easily processed during manufacturing, transfer and filling operations.
To effectively treat various microbial infections and to minimize side-effects, the antimicrobial activity of a composition should be maximized so that a minimum amount of active ingredient is used. The activity of the antimicrobial compositions of the present invention is generally the result of the antimicrobial agent itself; the composition components other than finafloxacin normally cause little effect.
It is also contemplated that the concentrations of the ingredients comprising the compositions of the present invention can vary. In preferred embodiments, finafloxacin is present in ophthalmic compositions at a concentration of about 0.1% to 1.0% w/v. Particularly preferred embodiments have a finafloxacin concentration of 0.1% to 0.5% w/v, and most preferred are embodiments having a finafloxacin concentration of about 0.3% to 0.4% w/v. A person of ordinary skill in the art would understand that the concentrations can vary depending on the addition, substitution, and/or subtraction of ingredients in a given composition.
Preferred compositions are prepared using a buffering system that maintains the composition at a pH of about 3 to a pH of about 8.0 and preferably from 5.0 to 7.5. Particularly preferred otic compositions have a pH of 5.0 to 6.0 and most preferred otic compositions have a pH of about 5.9. Particularly preferred ophthalmic compositions have a pH of 6.0 to 8.0 and most preferred ophthalmic compositions have a pH of 7.5 to 8Ø In certain embodiments, topical compositions (particularly topical ophthalmic compositions, as noted above) are preferred which have a physiological pH matching the tissue to which the composition will be applied or dispensed.
In the methods set forth herein, administration to a subject of a pharmaceutically effective amount of a composition that includes finafloxacin may be by any method known to those of ordinary skill in the art.
For example, the composition may be administered locally, topically, intradermally, intralesionally, intranasally, subcutaneously, orally, by inhalation, by injection, by localized perfusion bathing target cells directly, via a catheter, or via lavage.
In particular embodiments, the composition is administered topically to an ocular surface. Regarding ophthalmic administration, it is contemplated that all local routes to the eye may be used, including topical, subconjunctival, periocular, retrobulbar, subtenon, intraocular, subretinal, posterior juxtascleral, and suprachoroidal administration.
The compositions of the present invention may also comprise an anti-inflammatory agent. The compositions of the present invention may also contain one or more anti-inflammatory agents. The anti-inflammatory agents utilized in the present invention are broadly classified as steroidal or non-steroidal. The preferred steroidal anti-inflammatory agents are glucocorticoids. Glucocorticoids for ophthalmic, otic, or nasal use include dexamethasone, loteprednol, rimexolone, prednisolone, fluorometholone, hydrocortisone, mometasone, fluticasone, beclomethasone, flunisolide, triamcinolone and budesonide.
Non-steroidal anti-inflammatory agents are: prostaglandin H synthetase inhibitors (Cox I or Cox II), also referred to as cyclooxygenase type I and type II
inhibitors, such as diclofenac, flurbiprofen, ketorolac, suprofen, nepafenac, amfenac, indomethacin, naproxen, ibuprofen, bromfenac, ketoprofen, meclofenamate, piroxicam, sulindac, mefanamic acid, diflusinal, oxaprozin, tolmetin, fenoprofen, benoxaprofen, nabumetome, etodolac, phenylbutazone, aspirin, oxyphenbutazone, NCX-4016, HCT-1026, NCX-284, NCX-456, tenoxicam and carprofen;
cyclooxygenase type II selective inhibitors, such as NS-398, vioxx, celecoxib, P54, etodolac, L-804600 and S-33516; PAF antagonists, such as SR-27417, A-137491, ABT-299, apafant, bepafant, minopafant, E-6123, BN-50727, nupafant and modipafant; PDE IV inhibitors, such as ariflo, torbafylline, rolipram, filaminast, piclamilast, cipamfylline, CG-1088, V-11294A, CT-2820, PD-168787, CP-293121, DWP-205297, CP-220629, SH-636, BAY-19-8004, and roflumilast; inhibitors of cytolcine production, such as inhibitors of the NF.kappa.B transcription factor; or other anti-inflammatory agents known to those skilled in the art.
The concentrations of the anti-inflammatory agents contained in the compositions of the present invention will vary based on the agent or agents selected and the type of inflammation being treated. The concentrations will be sufficient to reduce inflammation in the targeted ophthalmic, otic or nasal tissues following topical application of the compositions to those tissues. Such an amount is referred to herein as "an anti-inflammatory effective amount". The compositions of the present invention will typically contain one or more anti-inflammatory agents in an amount of from about 0.01 to about 1.0 wt. %.
Various otic administration techniques are also contemplated. In particular embodiments, the composition may be delivered directly to the ear canal (for example: topical otic drops or ointments; slow release devices in the ear or implanted adjacent to the ear). Local administration routes include otic intramuscular, intratympanic cavity and intracochlear injection routes for the compositions.
It is further contemplated that certain compositions of the invention may be formulated in intraotic inserts or implant devices. For instance, delivery of the compositions can be accomplished by endoscopic assisted (including laser-assisted endoscopy to make the incision into the tympanic membrane) injection into the tympanic cavity as set forth, for example, in Tsue et al., Amer. J. Otolaryngology, Vol. 16(3):158-164, 1995;
Silverstein et al., Ear Nose Throat, Vol. 76:674-678, 1997; Silverstein et al., Otolaryngol Head Neck Surg, Vol. 120:649-655, 1999. Local administration can also be achieved by injection through the tympanic membrane using a fine (EMG
recording) needle, through use of an indwelling catheter placed through a myringotomy incision, and injection or infusion through the Eustachian tube by means of a small tubal catheter. Furthermore, the compositions can be administered to the inner ear by placement of gelfoam or similar absorbent and adherent product soaked with the compositions against the window membrane of the middle/inner ear or adjacent structure with due discretion and caution by a skilled clinician.
Various other devices can be used to deliver the compositions to the affected ear compartment;
for example, via catheter or as exemplified in U.S. Patent No. 5,476,446 which provides a multi-functional apparatus specifically designed for use in treating and/or diagnosing the inner ear of the human subject. Also see U.S. Patent No.
6,653,279 for other devices for this purpose.
Administration of the compositions described herein for the treatment of nasal infection can be via a number of methods known to those of skill in the art.
For example, such compositions can be administered in droplet form or by aerosol formation.
EXAMPLES
Examples 1-7 below were prepared according to embodiments of the present invention.
Ingredient % w/v Finafloxacin 0.1 to 1.0 Sodium Acetate 0.03 Acetic Acid 0.04 Mannitol 4.60 EDTA 0.05 Purified Water q.s. 100%
Ingredient (1/0 w /v Finafloxacin 0.10 to 1.0 Citric acid 0.2 Sodium citrate 0.1 Sodium chloride 0.7*
Sodium hydroxide/HCL Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafloxacin 0.10 to 1.0 Boric acid 1.0 Mannitol 3.0*
Tromethamine/HCL Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafioxacin 0.10 to 1.0 Boric acid 1.0 Mannitol 3.0*
Hydroxyethyl cellulose 0.5 Tromethamine/HCL Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafloxacin 0.10 to 1.0 Boric acid 1.0 Mannitol 3.0*
Carbopol 0.3 Tromethamine/HCL Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafloxacin 0.33 Magnesium Chloride (hexahydrate) 0.3 Sodium Acetate (trihydmte) 0.68 Mannitol 2.5 Benzalkonium Chloride 0.01 Sodium Hydroxide/Hydrochloric Acid Adjust pH
Purified Water q.s. 100%
Ingredient % w/v Finafloxacin 0.10 to 1.0 Zinc chloride 0.3-1.0 Sodium phosphate (anhydrous) 0.3-0.7 Sodium chloride 0.7*
Sodium hydroxide/HCL Adjust pi!
Purified Water q.s. 100%
*osmolality adjusted trern 200 to 350 in0810/kg EXAMPLE 8 ¨ In Vitro Antimicrobial Efficacy Studies A finafloxacin composition at pH 5.8 was compared to ciprofloxacin (pH 5.8) and ofloxacin (pH 5.8 and pH 7) compositions using standard in vitro antimicrobial susceptibility tests (M07-08 Methods for Dilution Antimicrobial Susceptibility. Tests for Bacteria that Grow Aerobically; Approved Standard-Eighth Edition (Jan 2009, Clinical and Laboratory Standards Institute)).
Minimum inhibitory concentrations (MICR) were determined using Gram-positive and Gram-negative test organisms commonly found in otic and ophthalmic infections.
The NCR) was the lowest concentration of antibiotic that prevented growth of the test organism, as determined visually by a lack of turbidity.
70 The results of the experiment are presented below in TABLE 1 (Grarn-positive organisms) and TABLE 2 (Gram-negative organisms). The finafloxacin compositions CA 02 7 65 852 2 011 ¨12 ¨1 6 showed lower MIC50 concentrations for all tested Gram-positive organisms compared to the ciprofloxacin and ofloxacin compositions.
TABLE 1 - Gram Positive Bacteria Finafloxacin Ciprofloxacin Ofloxacin Ofloxacin Organism at pH5.8 at pH 5.8 at pH 5.8 at pH 7 MIC5o (i.tg/mL) MICR) (.tg/mL) MIC50 (pg/mL) MICfo (itg/mI4 Staphylococcus aureus 4 128 64 32 ¨ Ciprofloxacin resistant (N=12) Staphylococcus aureus 0.016 1 1 0.25 ¨ Ciprofloxacin sensitive (N=8) Staphylococcus 2 128 32 16 epidermidis ¨
Ciprofloxacin resistant (N=12_ Staphylococcus 0.016 0.5 1 0.25 epidermidis ¨
Ciprofloxacin sensitive (N=8) Streptococcus 0.25 1 2 1 pneumonia (N---10) Enterococcus faecalis 8 128 16 128 (N=10) TABLE 2 - Gram Negative Bacteria Finafloxacin at Ciprofloxacin Ofloxacin at Ofloxacin at Organism 015.8 at pH 5.8 pfl 5.8 pH 7 MICso Wimp MIC50 (H/mL) MICR) ( g/m1_,) MIC50 (H/mL) Pseudomonas 16 64 256 64 aeruginosa ¨
Ciprofloxacin resistant (N=11) Pseudomonas 1 1 4 2 aeruginosa¨
Ciprofloxacin sensitive (N=14) Pseudomonas otitidis 0.125 0.25 1 0.25 (N=10) Haemophilus influenzae 0.008 0.016 0.031 0.031 (N=10) Escherichia colt (N=10) 4 256 512 16 Proteus mirabilis 0.25 0.125 0.5 0.125 (N=10) EXAMPLE 9 -In vivo Acute Otitis Externa (AOE) Model Finafloxacin test compositions (0.3%, 0.03%, and 0.003%) were compared to ofloxacin (0.3% and 0.03%) and ciprofloxacin compositions (CILOXAN , Alcon Laboratories, Inc (0.3% ciprofloxacin hydrochloride), 0.03%, and 0.003%) in a guinea pig model of acute otitis externa (AOE) using Pseudomonas aeruginosa. Guinea pig ears were slightly abraded and 200 ul of bacterial culture (108 CFU) of P.
aeruginosa were instilled into each ear. Ears were lavaged with saline and plated onto Pseudomonas isolation media. FIGURES la-id summarize the results of these studies.
As shown in FIGURE la, a 0.3% composition of finafloxacin resulted in almost complete eradication of Pseudomonas using two separate doses of test compostion. Lower concentration finafloxacin compositions (0.03% and 0.003%) still achieved very substantial 5-6 log reductions of Pseudomonas in the model. In the tests summarized in FIGURE la, finafloxacin performed as well as ciprofloxacin.
Finafloxacin was also compared to ofloxacin and ciprofloxacin compositions in single dose studies. FIGURE lb shows that a 0.3% finafloxacin composition resulted in almost complete eradication of Pseudomonas in the single dose study. Using a lower concentration composition (0.03%, shown in FIGURE lc) finafloxacin achieved a log CFU reduction in the single dose study. In this study, the finafloxacin composition performed as well as the ciprofloxacin composition and better than the ofloxacin composition. FIGURE ld demonstrates that the use of preservative (BAC) in 0.03% and 0.3% finafloxacin compositions does not affect the efficacy of finafloxacin against Pseudomonas compared to self-preserved compositions.
EXAMPLE 10- Ocular Pharmacokinetic Studies FIGURE 2 presents comparative corneal perfusion data for several quinolone antimicrobials (including finafloxacin) using an ex vivo model. 0.1 mM test solutions at pH 7.3 of four quinolone antimicrobials were compared in the model. As shown in FIGURE 2, the finafloxacin test composition has better corneal perfusion properties than the ciprofloxacin test composition and demonstrates less perfusion relative to the ofloxacin test composition.
FIGURES 3 and 4 present the results of ocular pharmacokinetic studies following topical administration of finafloxacin and ciprofloxacin compositions. The studies utilized New Zealand white rabbits, and 45 1.t1 of 0.3% test composition was instilled bilaterally. As shown in FIGURES 3 and 4, respectively, corneal stroma and aqueous humor tissue concentrations of both finafloxacin and ciprofloxacin were comparable at later time points, with the ciprofloxacin composition resulting in greater concentrations immediately following instillation.
EXAMPLE 11 - In vivo Keratitis Study Two 0.33% finafloxacin ophthalmic compositions with different buffer and pH characteristics were compared to CILOXAN in a rabbit keratitis model. New Zealand white rabbits received a corneal injection of 100 CFU of Staphylococcus aureus. The rabbits were treated topically with 45 Ill of the test composition once per hour starting 4 hours post-infection (6 treatments total). Corneas were harvested and cultured for viable cells 1 hour after fmal test treatment. As shown in FIGURE
5, both fmafloxacin compositions demonstrated Staphococcus aureus log reductions in the keratitis model similar to that of the CILOXAN composition. In a similar test using Psuedomonas aeruginosa, finafloxacin compositions demonstrated inferior Psuedomonas CFU reductions compared to CILOXAN .
73498-316(S) EXAMPLE 12¨ in vivo Ototexicity Study TABLE 3 below presents the results of toxicity testing performed in two animals models (chinchilla and rabbit). The tested finafloxacin compositions did not demonstrate inner or outer ear irritation in the animal models utilized.
Species Posology Treatment Groups Results Chinchilla 0.5 mL single = Vehicle pH 5.5 (no Mg or Zn) No indications dose with 72 hour = Vehicle with 1).13% ZnCl2 of inner ear extendedtoxicity in any = 0.3% Finafloxacin and observations = vehicle for 0.13%ZnC12 finafloxacin = Vehicle with 0.13% MgC12 groups = 0.3% Finafloxacin with 0.13%
MgCl2 Rabbit 0.2 mL bid for 7 = saline No indications days followed by = Vehicle pH 5.7(0.3% Mg and of significant 7 day observationsouter ear BAC in all) irritation with = Vehicle pH 7.5 finafloxacin = 0.3% Finafloxacin pH 5.7 = 0.3% Finafloxacin pH 7.5 = 0.6% Finafloxacin pH 7.5 = 1.0% Finafloxacin pH 7.5 The present invention and its embodiments have been described in detail.
to However, the scope of the present invention is not intended to be limited to the particular embodiments of any process, manufacture, composition of matter, compounds, means, methods, and/or steps described in the specification. One of ordinary skill in the art will readily appreciate from the disclosure that later modifications, substitutions, and/or variations performing substantially the same function or achieving substantially the same result as embodiments described herein may be utilized according to such related embodiments of the present invention.
Thus, the following claims are intended to encompass within their scope modifications, substitutions, and variations to processes, manufactures, compositions of matter, compounds, means, methods, and/or steps disclosed herein.
Claims (26)
1. A topical composition comprising finafloxacin or a pharmaceutically acceptable salt thereof and one or more excipients for use in the treatment of an otic infection.
2. The topical composition according to claim 1, wherein the finafloxacin or a pharmaceutically acceptable salt thereof is present in the composition at a concentration of 0.1 to 1.0 w/v%.
3. The topical composition according to claim 1, wherein the finafloxacin or a pharmaceutically acceptable salt thereof is present in the composition at a concentration of 0.1 to 0.5 w/v%.
4. The topical composition according to claim 1, wherein the finafloxacin or a pharmaceutically acceptable salt thereof is present in the composition at a concentration of 0.3 to 0.4 w/v%.
5. The topical composition according to any one of claims 1 to 4, the composition having a pH of 5.0 to 7.5.
6. The topical composition according to any one of claims 1 to 4, the composition having a pH of 5.0 to 6Ø
7. The topical composition according to any one of claims 1 to 6, further comprising an anti-inflammatory agent.
8. The topical composition according to claim 7, wherein the anti-inflammatory agent is a glucocorticoid.
9. The topical composition according to claim 8, wherein the glucocorticoid is dexamethasone.
10. The topical composition according to claim 8, wherein the glucocorticoid is loteprednol.
11. The topical composition according to claim 8, wherein the glucocorticoid is rimexolone.
12. The topical composition according to claim 8, wherein the glucocorticoid is prednisolone.
13. The topical composition according to claim 8, wherein the glucocorticoid is fluorometholone.
14. The topical composition according to claim 8, wherein the glucocorticoid is hydrocortisone.
15. The topical composition according to claim 8, wherein the glucocorticoid is mometasone.
16. The topical composition according to claim 8, wherein the glucocorticoid is fluticasone.
17. The topical composition according to claim 8, wherein the glucocorticoid is beclomethasone.
18. The topical composition according to claim 8, wherein the glucocorticoid is flunisolide.
19. The topical composition according to claim 8, wherein the glucocorticoid is triamcinolone.
20. The topical composition according to claim 8, wherein the glucocorticoid is budesonide.
21. The topical composition according to any one of claims 1 to 20, wherein the one or more excipients comprise a tonicity agent, a preservative, a solubilizing agent, pH-adjusting agent, water, or a combination thereof.
22. The topical composition according to claim 21, wherein the tonicity agent is sodium chloride.
23. The topical composition according to claim 21, wherein the preservative is benzalkonium chloride.
24. The topical composition according to claim 21, wherein the solubilizing agent is magnesium chloride.
25. The topical composition according to claim 21, wherein the pH-adjusting agent is sodium hydroxide.
26. The topical composition according to any one of claims 21 to 25, wherein the one or more excipients further comprises hydroxyethyl cellulose.
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US8536167B2 (en) * | 2009-07-02 | 2013-09-17 | Alcon Research, Ltd. | Methods for treating ophthalmic, otic, or nasal infections |
US20150174137A1 (en) * | 2010-06-02 | 2015-06-25 | Alcon Research, Ltd. | Compositions for treating microbial infections |
US8765725B2 (en) | 2012-05-08 | 2014-07-01 | Aciex Therapeutics, Inc. | Preparations of hydrophobic therapeutic agents, methods of manufacture and use thereof |
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US9504691B2 (en) * | 2012-12-06 | 2016-11-29 | Alcon Research, Ltd. | Finafloxacin suspension compositions |
US9815865B2 (en) | 2013-01-07 | 2017-11-14 | Nicox Ophthalmics, Inc. | Preparations of hydrophobic therapeutic agents, methods of manufacture and use thereof |
US20150045739A1 (en) * | 2013-08-12 | 2015-02-12 | Novartis Ag | Method for treating otic infections after tympanostomy tube placement |
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US6156728A (en) | 1996-11-01 | 2000-12-05 | Genentech, Inc. | Treatment of inner ear hair cells |
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US6716830B2 (en) | 1998-09-30 | 2004-04-06 | Alcon, Inc. | Ophthalmic antibiotic compositions containing moxifloxacin |
US6440964B1 (en) * | 1998-09-30 | 2002-08-27 | Alcon Manufacturing, Ltd. | Compositions and methods for treating ophthalmic and otic infections |
US6509327B1 (en) * | 1998-09-30 | 2003-01-21 | Alcon Manufacturing, Ltd. | Compositions and methods for treating otic, ophthalmic and nasal infections |
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