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Hemoglobin induces colon cancer cell proliferation by release of reactive oxygen species.

机译:血红蛋白通过释放活性氧来诱导结肠癌细胞增殖。

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AIM: To study whether hemoglobin could amplify colon cancer cell proliferation via reactive oxygen species (ROS) production. METHODS: Colon cancer cell line HT-29 was grown in the conventional method using RPMI1640 media. The viability of the cells was measured using the colorimetric MTT [3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide] assay after adding hemoglobin. We determined reactive oxygen species levels to be indicators of oxidative stress in HT 29 cell lines with and without hemoglobin and/or 5-fluorouracil (5-FU), 5'-deoxy-5-fluorouridine (5-DFUR) using fluorometric dichlorofluorescin diacetate (DCFH-DA) assay. RESULTS: Cellular proliferation was increased with hemoglobin in a concentration-dependent manner. A significant increment on ROS levels was found in HT 29 cells following hemoglobin incubation. The cytotoxic effects of 5-FU and 5-DFUR were significantly blunted by administration of hemoglobin. There was a slight increase of peroxiredoxin 1, superoxide dismutase 1 concentration according to different hemoglobin concentrations. CONCLUSION: Hemoglobin has a cellular proliferative effect on HT-29 colon cancer cell line by production of ROS. Also, hemoglobin abates cytotoxic effects of chemotherapeutic agents such as 5-FU and 5-DFUR.
机译:目的:研究血红蛋白是否可以通过活性氧(ROS)的产生来放大结肠癌细胞的增殖。方法:使用RPMI1640培养基以常规方法培养结肠癌细胞系HT-29。加入血红蛋白后,使用比色MTT [3-(4,5-二甲基噻唑-2-基)-2,5-二苯基溴化四溴化铵]测定法测量细胞的活力。我们确定了活性氧的含量水平是使用和不使用血红蛋白二氯荧光素双乙酸盐的HT 29细胞系中是否存在血红蛋白和/或5-氟尿嘧啶(5-FU),5'-脱氧-5-氟尿苷(5-DFUR)的氧化应激指标。 (DCFH-DA)分析。结果:血红蛋白以浓度依赖的方式促进细胞增殖。血红蛋白温育后,在HT 29细胞中发现ROS水平显着增加。通过施用血红蛋白,5-FU和5-DFUR的细胞毒性作用明显减弱。根据不同的血红蛋白浓度,过氧化物酶1,超氧化物歧化酶1的浓度略有增加。结论:血红蛋白通过产生ROS对HT-29结肠癌细胞系具有细胞增殖作用。另外,血红蛋白减轻了诸如5-FU和5-DFUR的化学治疗剂的细胞毒性作用。

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