DERIVATIVES OF 6,9-DESIGNED PURIN AND THEIR APPLICATION FOR THE TREATMENT OF THE SKIN

摘要

The present invention provides methods and compositions for counteracting the negative effects of aging on mammalian cells in vitro and in vivo, in particular human skin cells and human skin, and treating hyperproliferative and related skin diseases in mammals by using a composition containing derivatives of 6,9-disubstituted purines .