在脂质诱导压力期间,TCF7l2调节脂肪酸链延长酶HACD3
Atanu Mondal1,2, Sandhik Nandi1,2, Vipin Singh1,2
1Biophysics and Structural Genomics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India.
Biochemistry
|April 2, 2025
概括
减少TCF7l2表达激活了脂质代谢基因,促进了与代谢功能障碍相关的脂肪性肝病 (MASLD). 这种TCF7l2和TCF19的表观遗传调节会影响代谢障碍.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 代谢性疾病研究研究
背景情况:
- 代谢基因的转录调节对于压力期间的细胞平衡至关重要.
- 转录因子7-like 2 (TCF7l2) 与2型糖尿病 (T2D) 有关,并调节葡萄糖生成基因.
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 经常与T2D同时发生,这是由于共同的危险因素,如胰岛素抵抗.
研究的目的:
- 在棕酸诱导的压力下研究脂肪酸延长酶HACD3 (编码为PTPLAD1) 的转录调节.
- 阐明TCF7l2和TCF19在PTPLAD1表达的表观遗传控制中的作用.
- 探索这些发现对代谢障碍的影响.
主要方法:
- 研究了TCF7l2与TCF19在PTPLAD1促进体的相互作用.
- 在棕酸处理后对H3K4me3丰富度的评估变化.
- 在注射棕酸的小鼠和患有非酒精性脂肪肝疾病 (NAFLD) 的患者中分析了基因表达.
主要成果:
- TCF7l2和TCF19被招募到PTPLAD1的促进者.
- 棕酸处理减少了H3K4me3的丰富,导致TCF19-TCF7l2复合物的解离和PTPLAD1的激活.
- 减少TCF7l2表达与增加的HACD3活性和甘油三产量相关,加剧了MASLD的发展.
结论:
- TCF7l2,与TCF19结合,在表观遗传上调节脂质链延长酶基因激活.
- 这种涉及TCF7l2和TCF19的机制在像MASLD这样的代谢障碍的发病过程中起着重要作用.
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