Wound healing compositions and treatments
View Patent ↗This invention concerns improved methods, uses, and kits for treating chronic wounds through the administration of anti-connexin agents, particularly anti-connexin 43 antisense polynucleotides. The methods, uses, and kits of the invention are based on the surprising and unexpected discovery that chronic wounds that do not increase or decrease in size by more than a pre-determined amount during a pre-treatment phase are more amenable to successful treatment than wounds whose size varies outside the target range during the pre-treatment phase.
1. A method of treating a refractory wound, comprising:
a. measuring the size of a skin wound upon initial presentation for treatment to obtain a first size measurement;
b. administering compression bandaging to the wound;
c. measuring the size of the wound after 2-4 weeks of administering the compression to obtain a second size measurement;
d. determining that the second size indicator of the wound is within a predetermined range from about −30 to about +35% of the first size measurement, thereby identifying a refractory wound; and
e. administering to the refractory wound a pharmaceutical composition comprising a pharmaceutical carrier suitable for topical administration of an anti-connexin polynucleotide to a connexin selected from connexin 26, connexin 30 and connexin 43.
2. A method of treating a refractory venous leg ulcer, comprising administering to the ulcer a pharmaceutical carrier suitable for topical administration and about 3-30 mg/mL of an anti-connexin polynucleotide to a connexin selected from connexin 26, connexin 30 and connexin 43.
3. A method of detecting a refractory wound with an increased likelihood of complete closure following topical administration to the recalcitrant wound of a composition comprising a pharmaceutical carrier suitable for topical administration of an anti-connexin oligodeoxynucleotide to a connexin selected from connexin 26, connexin 30 and connexin 43, the method comprising:
a. measuring the size of a skin wound upon initial presentation for treatment, to obtain a first size measurement;
b. administering compression bandaging to the wound;
c. measuring the size of the skin wound after about 2-4 weeks of administering the standard of care, to obtain a second size measurement;
d. detecting that the second size measurement is within −30% to +35% of the first size measurement, thereby detecting a refractory wound having an increased likelihood of complete closure following topical administration to the recalcitrant wound of a pharmaceutical composition comprising a pharmaceutical carrier suitable for topical administration having about 20-23% of a nonionic polyoxyethylene-polyoxypropylene and about 3-30 mg/mL of an anti-connexin oligodeoxynucleotide to a connexin selected from connexin 26, connexin 30 and connexin 43; and
e. administering the pharmaceutical composition to the wound.
4. The method of any of claims 1 , 2 , or 3 wherein measuring the first or second size indicator further comprises using a handheld laser scanner or a camera.
5. A method according to claim 4 wherein the refractory wound is selected from the group consisting of a venous ulcers, venous stasis ulcers, arterial ulcers, pressure ulcers, diabetic ulcers, diabetic foot ulcers, vasculitic ulcers, decubitus ulcers, burn ulcers, trauma-induced ulcers, infectious ulcers, mixed ulcers, and pyoderma gangrenosum.
6. A method according to claim 1 wherein the refractory wound is a venous leg ulcer.
7. A method according to claim 1 comprising a plurality of administrations of the pharmaceutical composition.
8. A method according to claim 7 wherein the pharmaceutical composition is applied repeatedly until wound closure is achieved.
9. A method according to claim 8 wherein the administrations are periodic.
10. A method according to claim 9 wherein the periodic administrations occur at regularly scheduled intervals, optionally, daily, every other day, twice weekly, weekly, twice monthly, and monthly.
11. A method according to claim 10 wherein the periodic administrations occur once weekly until wound closure is achieved.
12. A method according to claim 1 wherein the anti-connexin 43 agent is an anti-connexin 43 oligodeoxynucleotide.
13. A method according to claim 1 wherein the anti-connexin 43 polynucleotide, is an oligodeoxynucleotide or modified oligodeoxynucleotide comprising from about 18 to about 32 nucleotides.
14. A method according to claim 1 wherein the subject is a mammal, optionally a human.
15. The method of any of claims 1 , 2 , 3 , or 6 - 14 wherein the pharmaceutical composition comprises a pharmaceutically acceptable carrier and an anti-connexin 43 polynucleotide present at a concentration selected from the following: from about 300 to about 3200 μM, from about 300 μM to about 2000 μM, from about 300 μM to about 1500 μM, from about 300 μM up to about 1000 μM, from about 200-300 μM, from about 300-400 μM, from about 400-500 μM, from about 500-600 μM, from about 600-700 μM, from about 700-800 μM, from about 800-900 μM, from about 900-1000 μM, from about 1000-1500 μM, from about 1500 μM-2000 μM, and from about 2000 μM-3000 μM.
16. The method according to claim 12 wherein the anti-connexin 43 polynucleotide is selected from: an oligodeoxynucleotide, a modified oligodeoxynucleotide, an unmodified oligodeoxynucleotide, an antisense polynucleotide, an unmodified antisense polynucleotide, and a modified antisense polynucleotide.
17. The method of claim 12 wherein the anti-connexin 43 polynucleotide is a sequence selected from SEQ ID NOS: 1-3.
18. The method of claim 12 wherein the anti-connexin 43 polynucleotide is a sequence selected from SEQ ID NOS: 1 and 2.
19. The method of claim 12 wherein the anti-connexin 43 polynucleotide is an antisense polynucleotide having at least about 70 percent homology with SEQ ID NOS: 1 and 2.
20. The method according to any of claim 1 , 2 , 3 , 6 - 14 , or 16 - 18 wherein the anti-connexin 43 polynucleotide is an antisense polynucleotide that hybridizes to connexin 43 mRNA under conditions of medium to high stringency.
21. The method according to claim 20 , wherein said antisense polynucleotide having a sequence selected from SEQ. ID. NO:1-3.
22. The method according to claim 20 , wherein said antisense polynucleotide is selected from:
(SEQ ID NO: 1)
GTA ATT GCG GCA AGA AGA ATT GTT TCT GTC;
and
(SEQ ID NO: 2)
GTA ATT GCG GCA GGA GGA ATT GTT TCT GTC
(SEQ ID NO: 3)
GGC AAG AGA CAC CAA AGA CAC TAC CAG CAT.
23. The method according to claim 20 , wherein said antisense polynucleotide has from about 15 to about 35 nucleotides and is sufficiently complementary to connexin 43 mRNA to form a duplex having a melting point greater than 20° C. under physiological conditions.
24. The method according to claim 20 , wherein the antisense polynucleotide has from about 15 to about 35 nucleotides and has at least about 70 percent homology to an antisense sequence of connexin 43 mRNA.
25. The method according to claim 12 , wherein said anti-connexin agent is an RNAi or siRNA polynucleotide.
26. The method according to any of claim 1 , 2 , 3 , 6 - 14 , or 16 - 18 which is formulated as a gel.
27. The method according to one of claim 1 or 12 , wherein the pharmaceutical formulation comprises a polyoxyethylene-polyoxypropylene copolymer-based gel or a carboxymethylcellulose-based gel.
28. The method according to one of claim 1 or 12 , wherein the pharmaceutical formulation comprises a pluronic gel.
29. The method according to one of claim 1 or 12 according wherein the pharmaceutical formulation comprises a pluronic F-127.
30. The method according to one of claim 1 or 12 , wherein the pharmaceutically acceptable carrier comprises an alginate.
31. The method according to one of claim 1 or 12 , wherein the pharmaceutically acceptable carrier comprises a hydrogel.
32. The method according to one of claim 1 or 12 , wherein the pharmaceutically acceptable carrier comprises a hydrogel selected from the group consisting of hydrogels containing a cellulose derivative and hydrogels containing polyacrylic acid.
33. The method according to one of claim 1 or 12 , wherein the pharmaceutically acceptable carrier is a cellulose-based carrier.
34. The method according to one of claim 1 or 12 , wherein the pharmaceutically acceptable carrier comprises a cellulose-based carrier selected from the group consisting of hydroxyethyl cellulose, hydroxymethyl cellulose, carboxymethyl cellulose, hydroxypropylmethyl cellulose and mixtures thereof.
35. The method according to one of claim 1 or 12 , wherein the composition is formulated for sustained release.
36. The method according to one of claim 1 or 12 , wherein the composition is formulated for slow release, extended release, or controlled release.
37. The method according to one of claim 1 or 12 , wherein the composition is a cream, ointment, emulsion, lotion, spray, salve, foam or paint.