ABSTRACT
MicroRNA(miRNA)is a kind of small non-coding single stranded RNA that can participate in multiple biological processes.It also plays an important role in regulating the immune function of the body.Immune thrombocytopenia(ITP)is an autoim-mune disease,whose cause and deterioration are closely related to miRNA regulates immune function of CD4+T cells subsets.In ITP patients,different expression of miRNA can affect the immune function of CD4+T cells subsets,which causes not only unbalanced ex-pression of Th1/Th2,Th17/Treg and excessive differentiation of TFH,but also abnormal cytokine secretion furthermore.This paper summarizes the unbalanced mechanism of miRNA regulating immune function of CD4+T cells subsets in ITP,so as to provide inspira-tion for exploring the immunology and immunotherapy of ITP.