PUFA 与多柔比星的相互作用:增强乳腺癌细胞的毒性

A. Zajdel, A. Wilczok
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摘要

多柔比星(DOX)仍然是治疗乳腺癌最有效的临床药物之一。二十碳五烯酸(EPA)和二十二碳六烯酸(DHA),即 n-3 多不饱和脂肪酸(PUFAs),对包括乳腺癌在内的多种癌症具有明显的毒性。因此,我们决定研究 DOX 和 PUFA 对 SK-BR-3 和 MDA-MB-231 细胞的毒性机制。研究人员测定了 DOX 对 PUFAs 氧化的影响,以及 DOX 和 EPA 或 DHA 对这些细胞的代谢活性、存活率、细胞毒性、细胞凋亡和 DNA 氧化损伤的影响。DOX 诱导了 EPA 和 DHA 的氧化。DOX 和 PUFA 对乳腺癌细胞的毒性与氧化损伤有关。这些 PUFAs 可降低受测细胞的生长速度并导致其死亡。EPA 和 DHA 通过诱导氧化 DNA 损伤增强了 DOX 的毒性作用。PUFAs 单独或与 DOX 合用的抗肿瘤效果在很大程度上取决于氧化应激的诱导,而氧化应激可促进细胞死亡。观察到的 PUFAs 诱导的 DOX 毒性变化表明,它们有可能被应用于开发抗癌治疗策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interaction of PUFAs and Doxorubicin: the Enhanced Toxicity in Breast Cancer Cells
Doxorubicin (DOX) still remains one the most effective a clinical drug for breast cancer treatment. Eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), the n-3 polyunsaturated fatty acids (PUFAs), exert pronounced toxicity against many types of cancers including breast cancer. That is why it was decided to investigate the mechanism of DOX and PUFAs toxicity on SK-BR-3 and MDA-MB-231 cells. The influence of DOX on the PUFAs oxidation and effect of DOX and EPA or DHA on cellular metabolic activity, viability, cytotoxicity, apoptosis and oxidative DNA damage in these cells were measured. DOX induced oxidation of the EPA and DHA. Toxicity of DOX and PUFAs towards breast cancer cells was associated with oxidative damage. These PUFAs reduced growth of the tested cells and caused their death. EPA and DHA potentiated DOX toxic effects through induction of oxidative DNA damage. The antitumor effect of PUFAs alone and combined with DOX strongly depended on induction of the oxidative stress that facilitated cell death. The observed changes of DOX toxicity induced by PUFAs suggest the possibility of their application in developing therapeutic anticancer strategies.
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