Claims for Patent: 10,322,081

Summary for Patent: 10,322,081

Title:	Topical antiviral compositions and methods of using the same
Abstract:	The present invention relates generally to topical antiviral compositions and methods of using the same.
Inventor(s):	Kimberly McHale, Ryan Doxey, Nathan Stasko
Assignee:	Ligand Pharmaceuticals Inc
Application Number:	US15/324,332
Patent Claims:	1. A method of treating and/or preventing a viral infection in skin of a subject in need thereof comprising: administering a topical composition to a surface of virally infected skin of a subject, wherein the topical composition comprises a nitric oxide-releasing active pharmaceutical ingredient that releases nitric oxide to the skin of the subject, wherein the nitric oxide-releasing active pharmaceutical ingredient comprises a NO-releasing co-condensed silica particle including a diazeniumdiolate functional group, wherein the topical composition releases nitric oxide in a cumulative amount of at least about 90 nmol of NO/mg of the composition at 4 hours after administration, as measured by real time in vitro release testing, and wherein the topical composition maintains a real time concentration of nitric oxide of at least about 25 pmol of NO/mg of the composition for at least 30 minutes after administration, as measured by real time in vitro release testing, thereby treating and/or preventing the viral infection in the skin of the subject. 2. The method of claim 1, wherein the topical composition maintains a real time concentration of nitric oxide of at least about 6 pmol of NO/mg of the composition for at least 2 hours after administration, as measured by real time in vitro release testing. 3. The method of claim 1, wherein the topical composition maintains a real time concentration of nitric oxide of at least about 5 pmol of NO/mg of the composition for at least 4 hours after administration, as measured by real time in vitro release testing. 4. The method of claim 1, wherein the topical composition has a maximum concentration of nitric oxide in a range of about 12 pmol of NO/mg of the composition to about 3500 pmol of NO/mg of the composition, as measured by real time in vitro release testing. 5. The method of claim 1, wherein the topical composition releases nitric oxide in a cumulative amount of about 300 nmol of NO/mg of the composition to about 1000 nmol of NO/mg of the composition at 24 hours after administration, as measured by real time in vitro release testing. 6. The method of claim 1, wherein the topical composition has a half life in a range of about 9 minutes to about 420 minutes, as measured by real time in vitro release testing. 7. A method of treating and/or preventing a viral infection in skin of a subject in need thereof comprising: administering a topical composition to a surface of virally infected skin of a subject, wherein the topical composition comprises a nitric oxide-releasing active pharmaceutical ingredient that releases nitric oxide to the skin of the subject, wherein the nitric oxide-releasing active pharmaceutical ingredient comprises a NO-releasing co-condensed silica particle including a diazeniumdiolate functional group, wherein the topical composition maintains a real time concentration of nitric oxide of at least about 300 pmol of NO/cm2 over a time period of at least 30 minutes after administration of the composition to the skin of the subject, as measured by real time in vitro release testing, and wherein the topical composition releases nitric oxide in a cumulative amount of about 1300 nmol of NO/cm2 to about 14,000 nmol of NO/cm2 in a time period of about 4 hours after administration of the composition to the skin of the subject, as measured by real time in vitro release testing, thereby treating and/or preventing the viral infection in the skin of the subject. 8. The method of claim 7, wherein the topical composition maintains a real time concentration of nitric oxide of at least about 74 pmol of NO/cm2 over a time period of at least 4 hours after administration of the composition to the skin of the subject, as measured by real time in vitro release testing. 9. The method of claim 7, wherein the topical composition releases nitric oxide in a cumulative amount of about 4500 nmol of NO/cm2 to about 14000 nmol of NO/cm2 in a time period of about 24 hours after administration of the composition to the skin of the subject, as measured by real time in vitro release testing. 10. The method of claim 7, wherein, after administration of the topical composition to the skin of the subject, the topical composition has a real time concentration of at least 50 pmol of NO/cm2 at 1 hour after administration, at least 40 pmol of NO/cm2 at 2 hours after administration, at least 25 pmol of NO/cm2 at 3 hours after administration, and/or at least 20 pmol of NO/cm2 at 4 hours after administration, as measured by real time in vitro release testing. 11. The method of claim 1, wherein the topical composition does not comprise acidified nitrite. 12. The method of claim 1, wherein the viral infection is caused by cytomegalovirus (CMV), epstein-barr virus, varicella zoster virus (VZV), vaccinia virus, cowpox virus, monkeypox virus, herpes simplex virus (HSV), herpes zoster, human herpes virus 6 (HHV-6), human herpes virus 8 (HHV-8), papillomavirus, molluscum contagiosum, orf, variola, and/or coxsackie virus. 13. The method of claim 1, wherein the viral infection is caused by a papillomavirus. 14. The method of claim 1, wherein the viral infection is caused by herpes simplex type 1 and/or herpes simplex type 2. 15. The method of claim 1, wherein the method prevents and/or reduces the appearance and/or size of a benign lesion. 16. The method of claim 1, wherein the method prevents and/or reduces the appearance and/or size of a malignant lesion. 17. The method of claim 1, wherein the subject is a human. 18. The method of claim 1, wherein the administering step comprises applying the topical composition to virally infected skin of the subject, wherein the virally infected skin comprises a wart, sore, papilloma, blister, and/or rash. 19. The method of claim 1, wherein the topical composition has a pH in a range of about 5 to about 8. 20. The method of claim 1, wherein the topical composition comprises: a first viscosity increasing agent; at least one polyhydric alcohol; at least one buffer; a second viscosity increasing agent; at least one organic solvent; at least one humectant; at least one active pharmaceutical ingredient; and water. 21. The method of claim 1, wherein the topical composition comprises two compositions that are mixed together prior to and/or during the administering step. 22. The method of claim 1, wherein a treatment effective and/or a prevention effective amount of nitric oxide is administered to the basal layer and/or basement membrane of the subject's epithelium. 23. The method of claim 1, wherein nitric oxide in an amount of about 1×10−5 M to about 1×10−7 M is administered to the basal layer and/or basement membrane of the subject's epithelium. 24. The method of claim 1, wherein nitric oxide is administered in an amount sufficient to induce apoptosis in virally infected cells. 25. The method of claim 1, wherein the topical composition has a Cmax of greater than 160 pmol of NO/mg, as measured by in vitro release testing. 26. The method of claim 1, wherein the topical composition has a Cmax of about 160 pmol of NO/mg to about 3500 pmol of NO/mg, as measured by in vitro release testing. 27. The method of claim 1, wherein the nitric oxide-releasing active pharmaceutical ingredient is present in the topical composition in an amount of about 0.5% to about 25% by weight of the topical composition. 28. The method of claim 1, wherein the topical composition stores and/or releases nitric oxide in an amount of about 0.05% to about 10% by weight of the composition. 29. The method of claim 1, wherein the topical composition releases nitric oxide in a cumulative amount of about 90 nmol of NO/mg to about 1000 nmol of NO/mg of the composition at 4 hours after administration, as measured by real time in vitro release testing. 30. The method of claim 1, wherein the topical composition maintains a real time concentration of nitric oxide of at least about 7 pmol of NO/mg of the composition for at least 1 hour after administration, as measured by real time in vitro release testing. 31. The method of claim 7, wherein the topical composition maintains a real time concentration of nitric oxide of at least about 104 pmol of NO/cm2 over a time period of at least 1 hour after administration of the composition to the skin of the subject, as measured by real time in vitro release testing. 32. The method of claim 7, wherein the topical composition maintains a real time concentration of nitric oxide of at least about 89 pmol of NO/cm2 over a time period of at least 2 hours after administration of the composition to the skin of the subject, as measured by real time in vitro release testing. 33. A method of treating and/or preventing a viral infection in skin of a subject in need thereof comprising: administering a topical composition to a surface of virally infected skin of a subject, wherein the topical composition comprises a nitric oxide-releasing active pharmaceutical ingredient that releases nitric oxide to the skin of the subject, wherein the nitric oxide-releasing active pharmaceutical ingredient comprises a NO-releasing compound including a diazeniumdiolate functional group, and wherein the topical composition comprises: a first viscosity increasing agent; at least one polyhydric alcohol; at least one buffer; a second viscosity increasing agent; at least one organic solvent; at least one humectant; at least one active pharmaceutical ingredient; and water, and wherein the topical composition releases nitric oxide in a cumulative amount of at least about 90 nmol of NO/mg of the composition at 4 hours after administration, as measured by real time in vitro release testing, thereby treating and/or preventing the viral infection in the skin of the subject.