Compositions and methods are provided for improved wound healing. In particular, provided herein are compositions and methods for the direct delivery of Sirtuin-1 (Sirt1) or vectors encoding Sirt1 to the wounds (e.g., of diabetic patients). In some embodiments, provided herein are therapeutic devices comprising: (a) a vector encoding Sirtuin-1 (Sirt 1); and (b) a hydrogel carrier. In some embodiments, the vector comprises a viral vector comprising a polynucleotide sequence encoding Sirt 1. In some embodiments, the vector comprises a non-viral vector comprising a polynucleotide sequence encoding Sirt1.