1,25-二氧维生素D3会影响3T3-L1脂肪细胞中太普西素诱导的内分泌网膜应激
1Department of Food & Nutrition, College of Health Science, The University of Suwon, Hwaseong 18323, Korea.
Nutrition research and practice
|February 14, 2024
概括
维生素D (1,25(OH) 2D3) 通过降低未折叠蛋白质响应 (UPR) 途径来减轻脂肪细胞内内质网膜 (ER) 的压力和炎症. 这种维生素还抑制脂肪细胞的发育,可能减少ER的压力.
科学领域:
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
- 代谢性疾病研究研究
背景情况:
- 脂肪组织中的内质网膜 (ER) 应激与炎症和代谢疾病有关.
- 维生素D在调节脂肪ER压力的作用尚不清楚.
研究的目的:
- 调查1,25-二氧维生素D3 (1,25(OH) 2D3) 是否可以减轻脂肪细胞中的ER压力.
- 探索维生素D对ER压力和脂肪细胞炎症影响的机制.
主要方法:
- 在分化过程中或之后,3T3-L1细胞被用1,25(OH) 2D3处理.
- 使用thapsigargin (TG) 诱导了ER压力.
- 展开蛋白质反应 (UPR) 和脂肪生成标志物通过qPCR和西式斑点分析;炎症性细胞因子被量化.
主要成果:
- 1,25(OH) 2D3显著抑制了脂肪细胞中TG诱导的ER压力.
- 维生素D治疗抑制了与UPR相关的基因表达 (例如,Ddit3,sXbp1,Atf4) 并减少了促炎性细胞因子分泌.
- 这些效应取决于VDR (维生素D受体) 的结合.
- 1,25(OH) 2D3还抑制了脂肪生成和相关的基因表达.
结论:
- 1,25(OH) 2D3通过降低通过VDR的UPR信号的调节来减轻脂肪细胞中的ER压力和炎症.
- 维生素D对脂肪生成的抑制作用也可能有助于减少脂肪细胞中的ER压力.
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