PRMT2穩(wěn)定過表達對MCF-7細胞自噬的影響及機制研究
[Abstract]:Aim: to investigate the effect of overexpression of arginine methyltransferase 2 (protein arginine methyltransferase 2 / PRMT2 on autophagy of human breast cancer MCF-7 cells and to explore the possible molecular mechanism of the change of autophagy. Method 1: 1. Electron transmission electron microscopy (TEM) was used to observe the changes of autophagy (autophagic vesicle) after PRMT2 overexpression. Cellular immunofluorescence technique was used to observe whether the expression of autophagy associated protein in human breast cancer MCF-7 cells changed after overexpression of PRMT2. Western blot (Western Blot,WB) was used to detect the changes of autophagy associated protein expression and to further analyze the effect of PRMT2 on autophagy of human breast cancer MCF-7 cells. High-throughput antibody chip technique was used to detect the expression of transduction pathway proteins at the key site of signal pathway related to PRMT2 and to explore the molecular mechanism of stable overexpression of PRMT2 affecting autophagy of breast cancer cell line ..MCF-7. The result is 1: 1. The changes of autophagy (area of autophagic vesicles) were observed under transmission electron microscope: in MCF-7 cells with stable expression of PRMT2, the number of autophagy bodies decreased significantly and decreased gradually with time. The results of cellular immunofluorescence showed that the expression of microtubule-associated protein light chain 3 (Microtubuleassociated protein light chain 3 + LC3A / B was decreased after the stable expression of microtubule related protein. The results showed that the expression of LC3A/B, yeast autophagy related gene 6 congener (p0.05) was decreased (p0.05) after the stable overexpression of the microtubule associated protein 3 (Microtubuleassociated protein light chain 3 + LC3A / B. The time shows a decreasing trend. High throughput antibody chip detection, The results suggested that the (Mammalian target of rapamycin complex,mTOR level of rapamycin target protein complex in mammals was down-regulated by: 1 / PRMT2. The results showed that phosphorylated adenosine activated protein kinase (AMP-activated protein kinase,AMPK) and autophagy associated protein 1 (Unc-51 like autophagy activating kinase 1 / ULK1) were down-regulated (p0.05). Conclusion: 1. PRMT2 can inhibit the autophagy of MCF-7 cells, and the relationship between PRMT2 and time is decreasing. 2. The inhibition of MCF-7 autophagy by PRMT2 may be achieved by down-regulating the AMPK-ULK1 signaling pathway.
【學位授予單位】:南華大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:R737.9
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