Free Radical Biology and Medicine:癌细胞为什么会产生耐药性?原来都是“它”在作祟!

2017-09-26 佚名 medicalxpress

【研究人员研究抵抗药物的癌细胞基因】癌细胞产生耐药性是治疗成效不高的关键因素,日前,研究人员发现了卵巢癌和乳腺癌细胞的耐药机制。他们发现,癌细胞从属的氧化还原反应就是维持耐药机制的罪魁祸首。研究人员报道,化疗的作用之一是逐渐停止肿瘤对细胞的影响,在此次研究中,研究人员运用生化机制,允许肿瘤细胞开发对抗肿瘤药物的耐药性。在化疗过程中,某些药物可以使癌细胞发生氧化应激,停止功能。然而,一段时间后,细胞



【研究人员研究抵抗药物的癌细胞基因】
癌细胞产生耐药性是治疗成效不高的关键因素,日前,研究人员发现了卵巢癌乳腺癌细胞的耐药机制。他们发现,癌细胞从属的氧化还原反应就是维持耐药机制的罪魁祸首。

研究人员报道,化疗的作用之一是逐渐停止肿瘤对细胞的影响,在此次研究中,研究人员运用生化机制,允许肿瘤细胞开发对抗肿瘤药物的耐药性。在化疗过程中,某些药物可以使癌细胞发生氧化应激,停止功能。然而,一段时间后,细胞适应药物,需要使用更大剂量,反过来,由于药物的毒性,更加影响病人的健康。

如何停止耐药性是化疗成功的关键,研究人员需要了解如何控制负责细胞生存能力的基因表达,氧化还原过程调节细胞抗氧化防御,保护细胞免受氧化应激,这样就可以正常运作。没有这些“后卫基因”,药物就可以更容易地将癌细胞消灭。研究人员希望,最终实现控制过程。

研究人员表示:“由于肿瘤细胞的耐药性不断发展,我们观察到编码亚型的硫氧还蛋白和酶类基因表达的增加,发挥重要作用的抗氧化防御系统和依从性氧化应激信号显着增加,这些数据指出,从属的氧化还原反应的重要角色,它很可能就是造成癌细胞耐药的根源。

原始出处:

Elena Kalinina et al.P 052 - Thioredoxins, glutaredoxins and peroxiredoxins in redox-dependent formation of cancer cell resistance.Free Radical Biology and Medicine (2017)

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    2018-01-12 jeanqiuqiu
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    2017-12-02 kalseyzl
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    2018-04-23 sunylz
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    2017-09-27 yxch36
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