TOPICAL COMPOSITIONS CONTAINING CROSS-LINKED GLYCOSAMINOGLYCANS
The present invention provides topical compositions comprising a cross-linked sulfated glycosaminoglycan and methods of making and using the same for treating skin, for example for signs of skin aging or dryness.
1 . A topical composition comprising a cross-linked sulfated glycosaminoglycan and a cosmetically acceptable topical carrier.
2 . The topical composition of claim 1 , wherein the cross-linked sulfated glycosaminoglycan is selected from the group consisting of cross-linked chondroitin sulfate, cross-linked heparan sulfate, cross-linked keratin sulfate, and cross-linked dermatan sulfate.
3 . The topical composition of claim 1 , wherein the cross-linked sulfated glycosaminoglycan comprises cross-linked chondroitin sulfate.
4 . The topical composition of claim 1 , wherein the sulfated glycosaminoglycan is cross-linked with ions selected from the group consisting of calcium ions, strontium ions, and magnesium ions.
5 . The topical composition of claim 1 , wherein the cross-linked sulfated glycosaminoglycan has a particle size of about 100 nm to about 10μ.
6 . The topical composition of claim 1 further comprising a cosmetically acceptable active ingredient.
7 . The topical composition of claim 1 further comprising a buffering agent selected from the group consisting of lactic acid, glycolic acid, citric acid, tartaric acid, gluconic acid, and gluconolactone.
8 . The topical composition of claim 1 having a pH of less than about 4.
9 . The topical composition of claim 1 , wherein the sulfated glycosaminoglycan is bacteria-derived.
10 . The topical composition of claim 1 , wherein the sulfated glycosaminoglycan is bacteria-derived chondroitin sulfate.
11 . A topical composition comprising a cosmetically acceptable active ingredient carried in a matrix comprising a cross-linked sulfated glycosaminoglycan and a cosmetically acceptable topical carrier.
12 . A method of treating signs of skin aging, comprising topically applying to skin in need of treatment for signs of skin aging a topical composition comprising a cross-linked sulfated glycosaminoglycan and a cosmetically acceptable topical carrier.
13 . A method of moisturizing skin, comprising topically applying to skin in need of moisturization treatment a topical composition comprising a cross-linked sulfated glycosaminoglycan and a cosmetically acceptable topical carrier.