Formulations of lipoic acid and hyaluroinc acid and/or the derivatives thereof in the pharmaceutical and cosmetic fields
The present invention relates to novel formulations comprising lipoic acid and hyaluronic acid and/or the derivatives thereof for use in the repair of chronic ulcers, the regeneration of damaged skin, the prevention of skin aging and, when administered by the systemic route, to treat peripheral neuropathies and intoxications by chemical and/or biological agents.
1. A topical composition comprising lipoic acid and the benzyl ester of hyaluronic acid with an esterification degree of 75%.
2. The composition according to claim 1 , wherein the percentage of lipoic acid varies between 0.5 and 15%.
3. The composition according to claim 2 , wherein the percentage of lipoic acid varies between 1 and 10%.
4. The composition according to claim 1 , in the form of non-woven fabric, cream, gel, lotion, or ointment.
5. The composition according to claim 4 in the form of a non-woven fabric.
6. A method of treating skin lesions which comprises topically applying thereto a combination of lipoic acid and of the benzyl ester of hyaluronic acid with an esterification degree of from 75%.
7. The method according to claim 6 , wherein the skin lesions are chronic ulcers, wounds, skin inflammation, autoimmune disorders, irritative, atopic or contact dermatitis, signs of aging or photoaging.
8. The method according to claim 7 which comprises topical treatment of chronic ulcers.
9. A process for preparing the composition according to claim 5 comprising the steps of:
preparing an ethanol solution of lipoic acid,
soaking in said solution a non-woven fabric made of the benzyl ester of hyaluronic acid with an esterification degree of 75%, and
drying the non-woven fabric by vacuum extraction on a hotplate.