The Promoting Effect of Radiation on Glucose Metabolism in Breast Cancer Cells under the Treatment of Cobalt Chloride
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- 作者：Chun-bo Zhao ; Lei Shi ; Hai-hong Pu ; Qing-yuan Zhang
- 关键词：Radiation ; hypoxia ; Glucose metabolism ; Hypoxia inducible factors ; 1α ; Cancer cell
- 刊名：Pathology & Oncology Research
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：23
- 期：1
- 页码：47-53
- 全文大小：
- 刊物主题：Cancer Research; Oncology; Pathology; Immunology; Biomedicine, general;
- 出版者：Springer Netherlands
- ISSN：1532-2807
- 卷排序：23
文摘
We aimed to investigate the influence of radiation on hypoxia-treated breast cancers cells and its underlying mechanism. We mimicked the hypoxic response in MCF-7 cells by the treatment of CoCl2. Meanwhile, hypoxic MCF-7 cells induced by CoCl2 or untreated MCF-7 cells were treated with or without radiation, and then treated with or without hypoxia inducible factors-1α (HIF-1α) inhibitor. Subsequently, glucose update and lactate release rate were determined by commercial kits, as well as the expressions of HIF-1α and the glucose metabolic pathway related genes, including fructose biphoshatase 1 (FBP1), glucose transporter 1 (GLUT1), lactate dehydrogenase A (LDHA), hexokinase 2 (HK2), and isocitrate dehydrogenase 2 (IDH20) were detected by western blotting and/or RT-PCR. The results showed that glucose uptake rate and lactate release rate were increased in cells under hypoxia and/or radiation condition compared with untreated cells (p < 0.05), while the addition of HIF-1α inhibitor decreased these rates in hypoxia + radiation treated cells (p < 0.05). In addition, compared with untreated cells, the mRNA and protein levels of HIF-1α were significantly increased under hypoxia and radiation condition (p < 0.05), while which decreased after the addition of HIF-1α inhibitor (p < 0.05). Similar content changing trends (all p < 0.05) were observed in FBP1, IDH2, GLUT1, and LDHA but not HK2. In conclusion, the combination of radiation and hypoxia could promote the glucose metabolism. Furthermore, HIF-1α might inhibit the promoting effect of radiation on glycolysis in hypoxic MCF-7 cells by regulating the glucose metabolic pathway.