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低氧条件下白藜芦醇对HepG2细胞增殖及自噬的调节作用及初步机制

DOI: 10.1360/052011-340, PP. 456-461

Keywords: 白藜芦醇,肿瘤,自噬,去乙酰化酶,鞘氨醇激酶

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Abstract:

白藜芦醇(resveratrol)是天然存在于葡萄、红酒及花生等中的一种多酚类化合物,具有抗癌、抗氧化等作用.目前针对resveratrol抗癌作用的研究大多侧重于常氧状态,而对于更接近体内肿瘤生长环境即低氧状态的研究相对匮乏.本文以肝癌细胞HepG2为模型,探讨了低氧(1%O2)条件下resveratrol抑癌的相关功能和机制.结果表明,在低氧状态下resveratrol不仅抑制HepG2细胞的活性,而且也促进了低氧诱导的自噬保护机制;进一步研究发现,去乙酰化酶Sirt1和鞘氨醇激酶SPK1也参与上述过程.本文初步揭示了低氧状态下癌细胞对resveratrol敏感性低的可能机制,更加明确resveratrol在实体瘤中的抗癌作用,并为resveratrol的药物研发提供了借鉴.

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