Crucial role of histone deacetylase SIRT1 in myeloid-derived suppressor cell-mediated reprogramming of CD4^(+) T-cell differentiation

摘要

Myeloid-derived suppressor cells(MDSCs)are heterogeneous,immature myeloid cells that inhibit the immune responses of T cells.1–5 MDSCs play a crucial role in infection,6,7 transplantation,8,9 autoimmune diseases10,11,and tumors12,13 by driving the differentiation of specific T-cell subsets,but the precise regulatory mechanism is still unclear.Recently,our results showed that SIRT1,a histone deacetylase,suppresses the functions of proinflammatory MDSCs and promotes tumor growth.14 However,it remains unclear whether SIRT1 regulates the MDSC-induced differentiation of T cells.Here,we identified the regulatory effects of SIRT1 in CD11b+Gr1+MDSCs on T-cell differentiation.