Systems and methods for topical treatment with nitric oxide
First Claim
1. A method for therapeutically applying NO, the method comprising combining a nitrite salt, a biocompatible reductant and an acid with a pKa between about 1 and about 4 in a medium and topically applying said combination to a body site.
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Accused Products
Abstract
A simple, biocompatible system and procedure for generating nitric oxide (NO) is described. A mixture of powdered sodium nitrite, ascorbic acid, and maleic acid (or another organic acid of adequate strength) immediately generates nitric oxide (NO) on treatment with water. To slow down the NO generation, one may prepare an ointment from a nonaqueous medium (petrolatum, Vaseline™) and the three powdered ingredients, which on being applied topically on the skin will release NO as water permeates through this medium; alternatively, one may convert the aqueous sodium nitrite solution into a gel with hydroxyethylcellulose (or other gel-forming compound) and combine this gel with another gel obtained from aqueous ascorbic and maleic acids with hydroxyethylcellulose for topical application (on intact skin, burns intra-cavity, burns, intra-cavity, etc.). The two gels may be admixed immediately before use (possibly from a single container with separate chambers and dual nozzle, via pushing or squeezing the two gels through the nozzle), or may be applied in sandwich-like fashion (possibly as a transdermal patch) for further slowing down the delivery of NO.
118 Citations
35 Claims
- 1. A method for therapeutically applying NO, the method comprising combining a nitrite salt, a biocompatible reductant and an acid with a pKa between about 1 and about 4 in a medium and topically applying said combination to a body site.
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2. A method for topical delivery of nitric oxide (NO) comprising mixing a powdered nitrite salt with a powdered reductant and an acid having a pKa between about 1 and about 4 in a diffusion-inhibiting topically applicable medium and topically applying an effective amount of said mixture to a body site.
- 13. A topically applicable ointment for controlled NO delivery comprising a nitrite salt, a reductant and an acid with a pKa between about 1 and about 4 in a medium sufficiently viscous to inhibit diffusion, permit slow NO release and facilitate topical application.
- 23. A composition for generating and controlling the release rate of NO for topical applications comprising a first aqueous gel and a second aqueous gel, the first gel comprising a nitrite salt, and the second gel comprising an acid having a pKa between about 1 and about 4 and at least one of the first and second gel comprising a reductant.
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34. A gel comprising a nitrite salt, an acid with a pKa between 1 and 4, and a reductant, for medical use.
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35. A kit containing a first gel comprising a nitrite salt, a second gel comprising an acid with a pKa between 1 and 4, and a reductant in at least one of the first and second gels.
Specification