饮食中的多不和脂肪酸会影响PPARγ促进体甲基化状态,并调节某些结直肠癌细胞系中的PPARγ/COX2通路
Esmaeel Babaeenezhad1,2,3, Peyman Khosravi1,2,3, Mostafa Moradi Sarabi4,5
1Nutritional Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran.
Genes & nutrition
|March 4, 2025
概括
饮食中的多不和脂肪酸 (PUFA),特别是多可萨赫萨酸 (DHA),可以改变结直肠癌 (CRC) 细胞基因甲基化. 这表明PUFA可能为CRC治疗提供了一种新的治疗策略.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 营养科学 营养科学
背景情况:
- 激素增酶激活受体 (PPARγ) 的促剂甲基化和PPARγ/COX2轴失调与结直肠癌 (CRC) 的发展有关.
- 饮食中的多不和脂肪酸 (PUFA) 代表了CRC的潜在治疗途径.
研究的目的:
- 研究饮食中PUFAs对PPARγ促进物甲基化和人类CRC细胞系中的PPARγ/COX2轴的影响.
- 为了确定埃可萨氨酸 (EPA),多可萨氨酸 (DHA) 和酸 (LA) 对CRC细胞的特定作用.
主要方法:
- 用EPA,DHA或LA对五种不同的CRC细胞系 (SW742,HCT116,Caco2,LS180,HT29/219) 进行处理.
- 使用甲基化特定PCR (MSP) 分析PPARγ促进体甲基化模式.
- 通过RT-qPCR量化PPARγ和COX2mRNA表达水平.
主要成果:
- 在不同CRC细胞系的PPARγ促进子区域中观察到特定的甲基化模式,M4半甲基化在所有细胞系中都是常见的.
- 多可萨赫萨酸 (DHA) 对SW742和Caco2细胞中的PPARγ促进体表现出脱甲基化作用.
- 在PUFA治疗后的CRC细胞中观察到显著的PPARγ上调和并发的COX2下调,特别是DHA.
结论:
- 饮食中的PUFA,特别是DHA,可以调节PPARγ促进体甲基化和表达在CRC细胞内以细胞依赖的方式.
- 与其他测试的PUFA相比,DHA在调节PPARγ促进物甲基化方面表现出更高的有效性.
- 这些发现强调了PUFA作为结直肠癌管理中的补充治疗策略的潜力.
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