SENP3對大鼠成骨細胞端粒酶活性及端粒長度的影響
[Abstract]:Aim: to study the effects of sentrin specific protease 3 (SENP3) on telomerase activity and telomere length in rat osteoblasts. Methods: the expression of SENP3 and specific protein 1 (Sp1) in cultured rat osteoblasts were detected by, Western blotting after 0. 2 mmol/L H_2O_2 treatment. The expression of SENP3 and specific protein 1 (Sp1) were detected by pc DNA3.0-SENP3 transfection into osteoblasts at 24 h and 48 h, respectively. After 72 hours, the changes of cell viability were detected by tetramethyl azolium blue (MTT) assay. 48 h after transfection, the expression of Sp1 and telomerase reverse transcriptase (TERT) was detected by, Western blotting, telomerase activity and telomere length were detected by PCR-TRAP and PCR, and the contents of alkaline phosphatase (ALP) and osteopontin (OPN) in supernatant were detected by ELISA. The content of osteocalcin (OCN) was detected by radioimmunoassay (RIA). Finally, pc DNA3.0-SENP3 and siRNA-Sp1 were co-transfected into osteoblasts and the above indexes were detected. Results: the expression of SENP3 and Sp1 increased significantly in osteoblasts treated with H_2O_2. After transfection of pc DNA3.0-SENP3 into osteoblasts, the expression of Sp1 and TERT increased significantly, and the cell viability, ALP,OPN and OCN contents also increased significantly. Telomerase activity increased significantly and telomere length decreased significantly. However, when pc DNA3.0-SENP3 and siRNA-Sp1 co-transfected osteoblasts, the cell viability, ALP,OPN and OCN contents, telomerase activity and telomere length did not change significantly. Conclusion: SENP1 can promote the expression of TERT by up-regulating the expression of Sp1, increase the telomerase activity and delay the shortening of telomere length, thus enhancing the proliferation ability of osteoblasts.
【作者單位】: 河南中醫(yī)藥大學第一附屬醫(yī)院;河南中醫(yī)藥大學中醫(yī)學博士后流動站第三附屬醫(yī)院博士后研發(fā)基地;
【分類號】:R580
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