增长分化因子-15刺激在下丘脑4B细胞中的皮质otropin释放因子的合成
Mizuki Tasso1, Kazunori Kageyama1, Yasumasa Iwasaki2
1Department of Endocrinology and Metabolism, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori 036-8562, Japan.
Peptides
|November 2, 2023
概括
增长差异化因子-15 (GDF15),是一种压力细胞因子,在下丘脑细胞中增加皮质otropin释放因子 (CRF) 基因表达. 这表明GDF15通路在压力下调节CRF.
科学领域:
- 神经内分泌学神经内分泌学
- 蜂信号传输是如何进行的
- 压力反应应对压力.
背景情况:
- 增长差异化因子-15 (GDF15) 是一种应激反应的细胞因子.
- GDF15 调节 pituitary 皮质otroph 功能和葡萄糖皮质体反.
- 目前尚不完全了解GDF15在下丘脑应激通路中的作用.
研究的目的:
- 为了研究GDF15对脑下垂体细胞皮质otropin释放因子 (CRF) 表达的作用.
- 阐明GDF15介导的CRF调节所涉及的信号通路.
主要方法:
- 利用 luciferase 记者测试来测量 4B 细胞中的 CRF 促进体活性.
- 使用定量实时聚合酶连锁反应的量化CRFmRNA水平.
- 研究了质细胞衍生的神经营养因子家族α类受体 (GFRAL) 和下游信号通路 (PKA,PKC,AKT,ERK,CREB) 的作用.
主要成果:
- GDF15显著增加了下丘脑4B细胞中的CRF促进体活性和CRFmRNA水平.
- 在4B细胞中证实了GFRAL表达,调解了GDF15效应.
- GDF15诱导的CRF表达涉及蛋白激酶A和C通路,导致AKT,ERK和CREB酸化.
结论:
- GDF15通过GFRAL和下游信号级联调节下丘脑细胞中的CRF表达.
- 这些发现表明,在压力期间,GDF15依赖的途径对于调节下丘脑中的CRF至关重要.
- GDF15代表了潜在的中介在下丘脑-垂体-上腺轴应对压力的反应.
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