RESUMO
[ ABSTRACT] AIM:To investigate the role of hydrogen sulfide ( H2 S) on impaired wound healing in ob/ob mice and the underlying mechanism.METHODS:The ob/ob mice were randomly divided into 3 groups, including vehicle, in-sulin and NaHS for treatment.C57BL/6 mice were treated with vehicle as control.Full-thickness punch biopsy wounds were created on the mice.Firstly, H2 S concentrations in the skins and granulation tissues were measured.The mRNA ex-pression of cystathionineγ-lyase ( CSE) was detected by RT-qPCR.The protein expression of CSE and MMP-9 were deter-mined by Western blot.The neutrophil and monocyte/macrophage infiltration was analyzed by immunohistochemistry me-thod.The levels of tumor necrosis factor (TNF)-αand interleukin (IL)-6 were measured by ELISA.Collagen formation was measured by Masson staining.RESULTS:The H2 S levels in the skin and granulation were significantly decreased in ob/ob mice and increased in the NaHS-treated mice ( P to impaired wound healing in diabetes, which is alleviated by exogenous H2 S possibly through anti-inflammation.