Dou Lei, Lu Enting, Tian Dongli, Li Fangmei, Deng Lei, Zhang Yi
Department of Gynecology, the First Affiliated Hospital of China Medical University, Shenyang 110001, Liaoning Province, China.
J Transl Int Med. 2023 Jul 5;11(2):169-177. doi: 10.2478/jtim-2023-0091. eCollection 2023 Jul.
BACKGROUND AND OBJECTIVES: The metabolic network of cancer cells has been reprogrammed - relying more on aerobic glycolysis to gain energy, which is an important reason for drug resistance. Expression of adrenomedullin (ADM) in ovarian cancer tissues is related to resistance to platinum-based drugs. In view of this, we intended to investigate the correlation between ADM and glucose metabolism reprogramming of tumor cells to clarify the possible mechanism of ADM-induced ovarian cancer cisplatin resistance through glucose metabolism reprogramming. METHODS: Epithelial ovarian cancer (EOC) cell viability and apoptosis were determined. Different gene expression and protein levels were detected by real-time revere transcription polymerase chain reaction and western blotting. Oxygen consumption rate (OCR) and extracellular acidification rates (ECARs) were measured. RESULTS: expression was upregulated in cisplatin-resistant EOC cells. ADM attenuated cisplatin-inhibited cell survival and cisplatin-induced apoptosis in sensitive EOC cells; knockdown of ADM enhanced cisplatin chemosensitivity of cisplatin-resistant EOC cells. ADM enhanced glycolysis in cisplatin-sensitive EOC cells; knockdown of ADM significantly inhibited glycolysis in cisplatin-resistant EOC cells. ADM significantly upregulated pyruvate kinase isozyme type M2 (PKM2) protein level, the key enzyme during glycolysis; PKM2 inhibitor significantly abolished the ADM-improved cell survival and ADM-inhibited apoptosis. CONCLUSION: ADM promoted proliferation and inhibited apoptosis of ovarian cancer cells through reprogramming of glucose metabolism, so as to promote cisplatin resistance. The study is expected to identify multidrug resistance markers of ovarian cancer and provide a target for the prevention and treatment of ovarian cancer, which is important for clinical translational research.
背景与目的:癌细胞的代谢网络已被重新编程——更多地依赖有氧糖酵解来获取能量,这是产生耐药性的重要原因。肾上腺髓质素(ADM)在卵巢癌组织中的表达与铂类药物耐药性有关。鉴于此,我们旨在研究ADM与肿瘤细胞葡萄糖代谢重编程之间的相关性,以阐明ADM通过葡萄糖代谢重编程诱导卵巢癌顺铂耐药的可能机制。 方法:测定上皮性卵巢癌(EOC)细胞活力和凋亡情况。通过实时逆转录聚合酶链反应和蛋白质印迹法检测不同基因表达和蛋白质水平。测量氧消耗率(OCR)和细胞外酸化率(ECAR)。 结果:顺铂耐药的EOC细胞中ADM表达上调。ADM减弱了顺铂对敏感EOC细胞存活的抑制作用以及顺铂诱导的凋亡;敲低ADM可增强顺铂耐药EOC细胞对顺铂的化疗敏感性。ADM增强了顺铂敏感EOC细胞的糖酵解;敲低ADM显著抑制了顺铂耐药EOC细胞的糖酵解。ADM显著上调了糖酵解关键酶丙酮酸激酶M2型(PKM2)的蛋白质水平;PKM2抑制剂显著消除了ADM改善的细胞存活和ADM抑制的凋亡。 结论:ADM通过葡萄糖代谢重编程促进卵巢癌细胞增殖并抑制凋亡,从而促进顺铂耐药。该研究有望鉴定卵巢癌的多药耐药标志物,并为卵巢癌的防治提供靶点,对临床转化研究具有重要意义。
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