二氧化物诱导的PAI-1表达:一种新的途径导致胰腺β细胞在2型糖尿病中的失败
Suyeol Im1,2, Sora Kang1,2, Woo Jung Son1
1Department of Biomedical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea.
International journal of molecular sciences
|November 27, 2024
概括
与2型糖尿病 (T2D) 相关的环境污染化学物质 (EPC) 可能会导致胰腺β细胞衰竭. EPCs抑制胰岛素分泌,并通过基碳化合物受体 (AhR) 和PAI-1通路促进细胞亡.
科学领域:
- 内分泌学 在内分泌学.
- 毒理学 毒理学 毒理学
- 分子生物学分子生物学
背景情况:
- 基碳化合物受体 (AhR) 连接体,普遍存在的环境污染化学物 (EPC),与2型糖尿病 (T2D) 的发展有关.
- 在T2D中,EPCs损害胰腺β细胞功能的确切机制尚不完全理解.
研究的目的:
- 调查AhR配体如何在T2D的背景下促进β细胞衰竭.
- 阐明AhR信号在调节胰岛素分泌和β细胞亡中的作用.
主要方法:
- 用2,3,7,8-四二二素 (TCDD),一种强大的AhR配体,化RINm5F大鼠胰腺β细胞.
- 给野生型和AhR肝 Knock-out (AhR-LKO) 的小鼠使用TCDD.
- 进行RNA测序分析以识别TCDD诱导的基因.
- 在β细胞中评估胰岛素分泌和亡.
主要成果:
- 低剂量的TCDD抑制了β细胞中的葡萄糖刺激胰岛素分泌 (GSIS).
- 在野生型小鼠中,TCDD减少了Langerhans岛屿的大小,但在AhR-LKO小鼠中没有.
- 在肝脏中,TCDD以依赖于AhR的方式调节了Serpine1 (编码PAI-1).
- 升高的PAI-1诱导了β细胞中的卡斯帕-3/7依赖性亡.
结论:
- AhR配体可能直接损害GSIS,并通过PAI-1间接诱导β细胞亡.
- EPC-PAI-1轴代表了T2D进展和β细胞衰竭之间的新联系.
- 准AhR-PAI-1通路可能为T2D提供治疗策略.
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