叶酸缺乏会改变与DNA甲基化水平相关的CIN3+风险:来自ASCUS-COL试验的嵌套病例对照研究
María C Agudelo1, Samuel Agudelo1, Attila Lorincz2
1Infection and Cancer Group, School of Medicine, Universidad de Antioquia, Carrera 51D No 62-29, 050010, Medellín, Colombia.
European journal of nutrition
|December 21, 2023
概括
低叶酸水平和高HPV甲基化水平独立地增加了3级+ (CIN3+) 宫内皮质瘤的风险. 将叶酸缺乏与高甲基化相结合,会显著增加CIN3+风险.
科学领域:
- 妇科 妇科 妇科 妇科
- 在瘤学瘤学.
- 营养科学 营养科学
背景情况:
- 宫癌与HPV感染和诸如DNA甲基化之类的表观遗传修饰有关.
- 叶酸对单碳代谢至关重要,在DNA合成和修复中发挥作用,可能影响癌症风险.
- 以前的研究表明,叶酸和HPV甲基化独立与子宫癌有关,但它们对癌前病变的联合作用不明.
研究的目的:
- 调查血清叶酸水平和HPV基因组甲基化对高度宫内皮质瘤 (CIN3+) 风险的联合影响.
- 评估叶酸水平是否会改变HPV甲基化和CIN3+风险之间的关联.
主要方法:
- 在一项随机临床试验中进行了病例对照研究,包括155名CIN2+妇女 (病例) 和155名CIN1或以下妇女 (对照).
- 血清叶酸度使用放射性免疫检测测量,使用S5分类器评估HPV甲基化水平.
- 逐步后勤回归模型分析了叶酸,甲基化和CIN3+风险之间的关联,包括联合效应.
主要成果:
- 与其他诊断组相比,患有CIN3+的女性血清叶酸水平显著降低 (p=0.019).
- 叶酸缺乏和高HPV甲基化分别与CIN3+风险增加有关.
- 叶酸缺乏和高甲基化水平的组合显示,与正常叶酸和高甲基化水平 (OR 1.4) 相比,CIN3+ (OR 8.9) 的风险明显增加.
结论:
- 高水平的HPV甲基化和叶酸缺乏都是CIN3+的独立风险因素.
- 当叶酸缺乏与高HPV甲基化相结合时,存在一个协同效应,显著放大了发展CIN3+的风险.
- 这些发现强调了在宫癌预防策略中考虑营养状况和表观遗传因素的重要性.
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