Role of histone deacetylase 3 in ankylosing spondylitis via negative feedback loop with microRNA-130a and enhancement of tumor necrosis factor-1α expression in peripheral blood mononuclear cells

The present study was performed to investigate the molecular mechanism of ankylosing spondylitis (AS). The interaction between micro (mi)RNA-130a and its target tumor necrosis factor (TNF)-1α and histone deactylase (HDAC)3 was assessed in peripheral blood mononuclear cells (PBMCs) from AS patients. Increased HDAC3 and decreased miRNA-130a levels were observed in PBMCs from AS patients. HDAC3 knockdown or HDAC3 inhibition promoted the expression of miRNA-130a, and HDAC3 was recruited to the promoter region of the gene encoding miRNA-130a in PBMCs. In addition, miR-130a overexpression led to a decrease, whereas miR-130a inhibition led to an increase of TNF-1α expression in PBMCs. Furthermore, HDAC3 knockdown or HDAC3 inhibition was associated with simultaneous upregulation of the expression of miR-130a and downregulation of the expression of TNF-1α in PBMCs. These results indicated that HDAC3 was involved in the regulation of the underlying molecular mechanism of AS by forming a negative feedback loop with miR-130a and enhancement of TNF-1α expression.