细胞间接触会影响胰腺小岛细胞的分泌和生物合成
David Cottet-Dumoulin1,2, Quentin Perrier1,2, Vanessa Lavallard1,2
1Cell Isolation and Transplantation Center, Department of Surgery, Geneva University Hospitals and University of Geneva, Geneva, Switzerland.
The Journal of endocrinology
|May 31, 2023
概括
细胞间接触会影响小岛细胞的功能. β细胞蛋白质生物合成与胰岛素分泌相关,而α细胞在与β细胞相互作用时降低蛋白质合成,影响激素调节.
科学领域:
- 内分泌学 在内分泌学.
- 细胞生物学 细胞生物学
- 岛屿生理学 岛屿生理学
背景情况:
- 细胞蛋白质生物合成对于小岛细胞功能至关重要,调节激素储备和分泌控制.
- 细胞间接触对α和β细胞蛋白质生物合成的影响在很大程度上仍未被探索.
研究的目的:
- 研究细胞间相互作用如何影响大鼠α和β细胞中的蛋白质生物合成和分泌.
- 为了确定同质和异质细胞接触是否不同调节这些过程.
主要方法:
- 通过ELISA和逆溶血斑块检测分析了胰岛素和葡萄糖分泌.
- 通过生物对等非规范性氨基酸标记评估单细胞蛋白质生物合成.
- 在不同的葡萄糖条件下,研究了同类 (β-β) 和异质 (β-α) 细胞接触的影响.
主要成果:
- 贝塔细胞显示胰岛素分泌和蛋白质生物合成之间存在正相关性.
- 同源接触物在低/中等葡萄糖时增强了β细胞的分泌和生物合成,但在高葡萄糖时只会分泌.
- 异质接触对β细胞分泌或生物合成没有显著影响.
- 当α细胞与β细胞接触时,α细胞增加了葡萄糖分泌,但在所有测试的葡萄糖度下降了蛋白质生物合成.
结论:
- 细胞间接触在调节小岛细胞功能方面发挥着重要作用.
- 贝塔细胞中的蛋白质生物合成通过细胞接触得到增强,除了高葡萄糖水平.
- 阿尔法细胞蛋白质生物合成被细胞接触抑制,即使在刺激葡萄糖分泌期间也是如此.
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