HSP70抑制剂放大了骨质母细胞中bFGF诱导的IL-6的释放
Gen Kuroyanagi1, Tomoyuki Hioki2, Rie Matsushima-Nishiwaki2
1Department of Rehabilitation Medicine, Nagoya City University Graduate School of Medical Sciences, Nagoya, Aichi 467‑8601, Japan.
Molecular medicine reports
|October 27, 2023
概括
热冲击蛋白70 (HSP70) 抑制剂增强骨质细胞中由基本纤维细胞生长因子 (bFGF) 刺激的IL-6 (IL-6) 释放. 这通过激活p38基因激活蛋白激酶 (MAPK) 途径来发生.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 热冲击蛋白70 (HSP70) 是一种依赖ATP的分子伴侣,对蛋白质平衡至关重要.
- 众所周知,HSP70抑制剂可以放大TGF-β刺激的VEGF合成.
- 基本纤维细胞生长因子 (bFGF) 在骨质细胞类细胞中通过p38 MAPK刺激IL-6的释放.
研究的目的:
- 研究HSP70在bFGF刺激的IL-6在骨质细胞中释放中的作用.
- 为了阐明这个过程中涉及的信号通路.
主要方法:
- 使用了MC3T3-E1骨质母细胞样细胞和正常人骨质母细胞.
- 使用ELISA和RT-qPCR量化IL-6释放和mRNA表达.
- 蛋白质酸化 (p38 MAPK和HSP70) 通过西式斑点测试进行了评估.
- 使用了针对HSP70 (VER-155008,YM-08) 和p38 MAPK (SB203580) 的特定抑制剂.
主要成果:
- HSP70抑制剂VER-155008和YM-08显著增加了bFGF刺激的IL-6释放和mRNA表达.
- HSP70抑制剂增强了bFGF诱导的p38 MAPK酸化.
- 该p38 MAPK抑制剂SB203580阻止了VER-155008对IL-6释放的增强作用.
- 抑制剂对HSP70表达水平没有显著的影响.
结论:
- 抑制HSP70可以放大bFGF刺激的IL-6在骨质母细胞中的释放.
- 这种效应是由p38 MAPK信号通路的激活介导的.
- 向HSP70可能是调节骨细胞IL-6产生的一种治疗策略.
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