I-BET151调节葡萄酶基因表达和β细胞功能,部分通过FOXO1表达的变化
Qing Wei Calvin Ho1, James A Miller1, Divya Gunaseelan1
1Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Singapore, Republic of Singapore.
Diabetologia
|September 26, 2025
概括
抑制BET可能会损害胰腺β细胞功能. 这项研究发现,I-BET151降低了小鼠的葡萄糖调节和胰岛素分泌,影响了关键的β细胞基因. 建议在使用BET抑制剂治疗时谨慎使用.
科学领域:
- 表观遗传学和分子生物学
- 内分泌学和新陈代谢
- 癌症生物学 癌症生物学
背景情况:
- 原体和外终端 (BET) 蛋白质是表观遗传阅读器,调节基因转录.
- BET蛋白与癌症和1型糖尿病等疾病有关.
- 对BET抑制剂对宿主细胞的潜在非向作用需要进行研究.
研究的目的:
- 研究BET抑制对胰腺β细胞功能的二次影响.
- 确定BET抑制剂I-BET151对葡萄糖恒温和胰岛素分泌的影响.
- 确定BET抑制对β细胞的影响背后的分子机制.
主要方法:
- 使用BET抑制剂I-BET151.1.进行体外,体外和体内研究.
- 在小鼠中进行葡萄糖耐受性测试 (GTT) 和胰岛素耐受性测试 (ITT).
- 葡萄糖刺激胰岛素分泌量测定和动物和人类小岛的转录基因分析.
主要成果:
- 在健康和糖尿病小鼠中,I-BET151的使用增加了葡萄糖外流,并减少了胰岛素反应.
- I-BET151显著降低了必不可少的β细胞功能基因 (例如,Hnf4α,Gck,Hnf1α,Glut2) 的表达.
- 转录组分析显示PI3K-Akt通路的下调,FOXO1调节有部分拯救作用.
结论:
- 抑制BET可能对胰腺β细胞功能产生有害影响.
- 高度的BET抑制剂可能会对葡萄糖调节和胰岛素分泌产生负面影响.
- 由于对β细胞的潜在不良影响,BET抑制剂的治疗用途需要谨慎使用.
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