China Animal Husbandry and Veterinary Medicine ›› 2023, Vol. 50 ›› Issue (6): 2255-2264.doi: 10.16431/j.cnki.1671-7236.2023.06.009

• Physiological and Biochemical • Previous Articles     Next Articles

Study on the Inhibition of Hydrogen Peroxide-induced Cellular Aging by AMPK

CHEN Cui1, GONG Lei1, XU Zhe1, WANG Xiaobo2,3   

  1. 1. Institute of Function and Morphology, Qujing Medical College, Qujing 655000, China;
    2. School of Basic Medicine, Dali University, Dali 671000, China;
    3. Key Laboratory of University Cell Biology Yunnan Province, Dali 671000, China
  • Revised:2023-03-03 Online:2023-06-05 Published:2023-05-30

Abstract: 【Objective】 This study was aimed to construct a stable expression of adenosine 5'-monophosphate-activated protein kinase (AMPK)/AMPK-T172D NIH3T3 cell lines, and investigate the effect of AMPK on hydrogen peroxide (H2O2)-induced cell senescence.【Method】 AMPK gene and its mutant form AMPK-T172D were amplified by PCR and cloned into lentiviral vector pLVX-IRES-Puro.The pLVX-IRES-AMPK/AMPK-T172D recombinant plasmids were constructed and double digestion was verified.The constructed recombinant plasmid was packaged into Lentivirus, infected with NIH3T3 cells, and puromycin screening was used to obtain stable cell lines.Real-time quantitative PCR and Western blotting were used to detect the mRNA and protein expression of AMPK in stable cell lines, respectively.The AMPK/AMPK-T172D overexpression of NIH3T3 cell lines was treated with 8.8 mmol/L H2O2, and after 2 days of culture, cellular senescence was detected by senescence-associated-β-galactosidase (SA-β-Gal) and the expression of p53, p21 and IL-6 genes were detected by Real-time quantitative PCR.【Result】 The results of double digestion verification showed that compared with control group, the pLVX-IRES-AMPK/AMPK-T172D expression plasmid was successfully constructed.Real-time quantitative PCR and Western blotting results showed that the expressions of mRNA and protein of AMPK and AMPK-T172D were extremely significantly or significantly increased (P<0.01 or P<0.05).The mRNA expression of carnitine palmitoyltransferase-1 (CPT-1) and fatty acid synthase (FAS) in AMPK/AMPK-T172D overexpressing NIH3T3 cells were significantly or extremely significantly increased (P<0.05 or P<0.01).The cell positive rate of SA-β-Gal was extremely significantly decreased (P<0.01). The mRNA expression of p53, p21 and IL-6 genes were significantly or extremely significantly decreased in AMPK/AMPK-T172D overexpressed NIH3T3 cells(P<0.05 or P<0.01).【Conclusion】 The stable expression of AMPK/AMPK-T172D overexpression NIH3T3 stable cell lines was successfully obtained, and AMPK activation could reduce the cell positive rate of SA-β-Gal and the expression of aging-related factors (p53, p21 and IL-6) in H2O2-induced senescent cells.The results would provide a basis for the research on the role of AMPK in aging, possible molecular mechanisms and anti-aging treatment strategies.

Key words: AMPK gene; sustained activation type; stable cell line; NIH3T3 cell; aging

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