Abnormal Histones Acetylation In Patients With Primary Sjögren’s Syndrome
Abstract Background pSS is an autoimmune disease characterized by an exocrine gland epithelium injury with dense lymphocytic infiltration, involvement of the peripheral nervous, pulmonary, blood, kidney, skin, and joint. Aberrant histone acetylation is increasingly thought to plays important role in the pathogenesis of AIDs. However, there is very little data on histone acetylation in pSS. Methods We investigated the expressions of HAT genes (p300, CREEBP and PCAF) by real time PCR in PBMCs from pSS patients. HAT activity and histone H3/ H4 acetylation activity measured by activity kit and histone H3/H4 acetylation verified by WB. Spearman test was utilized to analyze the association between levels of HAT activity and clinical parameters of patients with pSS. Results The expressions of p300, CREEBP and PCAF in PBMCs from pSS patients were decreased in mRNA comparison with HCs. HAT activity and histone H3/H4 acetylation were reduced in PBMCs from pSS patients. We found negatively correlations between the HAT activity and CRP and TNF-α, and positively correlations between the HAT activity and C4. Conclusions Histone hypoacetylation is observed in patients with pSS and involved in the disease duration of Sjogren's syndrome.