胆酸调节SF-1以通过S1PR2改变 adrenocortical 细胞中的胆固醇平衡
Lei Liu1, Shufan Zhou1, Alex Zaufel2
1Department of Endocrinology, the First Affiliated Hospital of Anhui Medical University, Hefei City, Anhui Province, People's Republic of China.
Biochemical and biophysical research communications
|December 7, 2023
概括
结合胆酸通过影响类固醇原因子1 (SF-1) 酸化来调节上腺胆固醇平衡. 这种机制确保了足够的胆固醇供应用于葡萄糖皮质醇合成,影响上腺功能.
科学领域:
- 内分泌学 在内分泌学.
- 代谢调节 代谢调节 代谢调节
- 类固醇的产生.
背景情况:
- 上腺皮质中的葡萄糖皮质合成依赖于胆固醇平衡.
- 胆汁酸是已知的信号分子,促进类固醇生成.
- 胆汁酸对上腺胆固醇平衡的直接影响尚不清楚.
研究的目的:
- 研究胆汁酸是否直接调节上腺皮细胞中的胆固醇平衡.
- 阐明胆汁酸影响上腺胆固醇代谢和葡萄糖皮质体合成的分子机制.
主要方法:
- 使用胆固醇性小鼠模型 (常见胆道绑定-CBDL) 和培养的人类上腺皮细胞 (H295R).
- 陶氏二氧化醇酸 (TCDCA) 用于评估对基因转录和胆固醇水平的影响.
- 使用特定受体 (S1PR2),信号通路 (ERK) 和转录因子 (SF-1) 的抑制来剖析该机制.
主要成果:
- 在小鼠中食CBDL和陈氧胆酸 (CDCA) 增加了胆固醇代谢基因表达和降低了上腺胆固醇度.
- 在H295R细胞中的TCDCA治疗降低了细胞内胆固醇和胆固醇,同时增加了SRB1,MC2R和HSL的表达.
- 通过抑制S1PR2,ERK酸化和SF-1来消除TCDCA诱导的影响,在Thr75观察到SF-1酸化.
结论:
- 结合胆酸通过SF-1调节调节 adrenocortical 细胞中的胆固醇平衡.
- 这一规定确保了足够的胆固醇用于葡萄糖皮质激素合成.
- 这些发现增强了对胆汁酸对上腺功能和胆固醇平衡作用的理解.
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