在肥胖和胰岛素耐药性中基因表达的代谢表观调节
Swapan K Das1, Mary E Comeau2, Carl D Langefeld2,3
1Department of Internal Medicine, Section of Endocrinology and Metabolism, Medical Center Boulevard, Wake Forest University School of Medicine, Winston-Salem, NC, 27157, USA. sdas@wakehealth.edu.
Metabolomics : Official journal of the Metabolomic Society
|August 3, 2024
概括
代谢物影响脂肪组织中的DNA甲基化,影响与肥胖和胰岛素抵抗相关的基因. 这项研究揭示了非洲裔美国人的特定代谢物-CpG位点基因相互作用.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 代谢学 代谢学 代谢学
- 基因组学就是基因组学.
背景情况:
- 脂肪组织中的DNA甲基化 (DNAm) 变异与肥胖和胰岛素抵抗有关.
- 代谢协因子对于调节DNAm水平的酶至关重要.
研究的目的:
- 研究血代谢物在调节表观遗传标记中的作用.
- 为了检查特定的血代谢物和脂肪组织DNAm在非裔美国人之间的关联.
主要方法:
- 使用AAGMEx队列 (N=256) 与非向液体染色学质谱仪进行血代谢物分析.
- 测量脂肪组织DNAm和转录水平,分别使用减少表示二硫酸盐测序和表达微阵列.
- 进行了cis表达定量特征甲基化 (cis eQTM) 分析.
主要成果:
- 21个单碳代谢代谢物中的6个与葡萄糖代谢特征 (BMI,胰岛素敏感性) 相关.
- 在多个CpG位点确定了S-adenosylhomocysteine (SAH),cystine,hypotaurine和DNAm之间的显著关联.
- 发现与代谢物相关的CpG位调节脂肪组织基因表达,包括与BMI和胰岛素敏感性相关的GNA15.
结论:
- 特定的血代谢物在脂肪组织中的特定位置调节DNAm.
- 这些表观遗传变化反过来又影响了与肥胖和胰岛素抵抗有关的基因的表达.
- 突出了代谢产物,表观遗传学和非洲裔美国人的代谢健康之间的机制联系.
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