TGF-β2通过升调分泌性自道增加eHSP90α的分泌量
Jing Li1,2, Junmin Li1, Tong Xie1
1Joint National Laboratory for Antibody Drug Engineering, Henan University, Kaifeng, 475004, China.
Cell communication and signaling : CCS
|November 13, 2025
概括
细胞外热冲击蛋白90α (eHSP90α) 从透镜上皮细胞的分泌涉及分泌自. 转化生长因子β2 (TGF-β2) 增强了eHSP90α的分泌,促进了镜片细胞的分化.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 眼科医生 眼科 眼科
背景情况:
- 细胞外热冲击蛋白90α (eHSP90α) 调节包括细胞分化在内的关键细胞过程.
- 透镜上皮细胞分泌eHSP90α,这对透镜再生至关重要,通过促进分化成为透镜纤维细胞.
- 自与eHSP90α分泌有关,但其精确的机制尚未完全理解.
研究的目的:
- 阐明从镜片上皮细胞分泌的细胞外热冲击蛋白90α (eHSP90α) 的机制.
- 调查自在eHSP90α分泌中的作用.
- 确定转化生长因子β2 (TGF-β2) 如何影响eHSP90α分泌和随后的透镜细胞分化.
主要方法:
- 使用了透镜上皮细胞系,ex vivo培养的老鼠透镜囊袋和初级老鼠透镜上皮细胞.
- 采用免疫涂抹,qPCR,免疫光染色,siRNA/CRISPR-Cas9基因敲除,ChIP试验以及核/细胞质提取试验.
- 研究了蛋白质和mRNA表达,自细胞形成,蛋白质同局部化,基因沉默,转录因子结合和核转位.
主要成果:
- 细胞外热冲击蛋白90α (eHSP90α) 通过分泌性自途径分泌,涉及与TRIM16和SEC22B的相互作用.
- 转化生长因子-β2 (TGF-β2) 通过通过p38和ERK1/2信号激活分泌性自途径来调节eHSP90α分泌.
- TGF-β2还通过ERK1/2-介导的TFEB和TFE3的核转位来增加SEC22B的表达,最终促进镜片上皮细胞的分化.
结论:
- 透镜上皮细胞对eHSP90α的分泌通过涉及TRIM16和SEC22B的分泌性自途径发生.
- 转化生长因子-β2 (TGF-β2) 通过上调分泌性自途径来增强eHSP90α的分泌.
- TGF-β2诱导的eHSP90α分泌量的增加促进了透镜上皮细胞分化为透镜纤维细胞.
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