TNF-α通过组织蛋白甲基转移酶Setdb2抑制纤维细胞向肌纤维细胞的转变
Tyler M Bauer1, Kevin D Mangum1, Samuel D Buckley1
1Department of Surgery.
JCI insight
|November 24, 2025
概括
在糖尿病性伤口中,蛋白质SETDB2损害了纤维细胞向肌纤维细胞的过渡. 针对TNF-α/STAT3/SETDB2通路可以通过恢复这一关键修复过程来增强伤口愈合.
科学领域:
- 细胞生物学 细胞生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 伤口治愈研究研究 伤口治愈研究
背景情况:
- 纤维细胞向肌纤维细胞的转变对于组织修复至关重要.
- 这种过渡在2型糖尿病 (T2D) 等病理条件下受损.
- 在糖尿病伤口中控制这种过渡的分子机制尚不清楚.
研究的目的:
- 在糖尿病伤口中的纤维细胞转移到肌纤维细胞转移受损时,研究素甲基转移酶SETDB2的作用.
- 阐明参与调节纤维细胞中SETDB2表达的信号通路.
- 探索针对已确定途径的治疗策略,以改善糖尿病伤口愈合.
主要方法:
- 利用人类组织和小鼠转基因模型.
- 在糖尿病伤口纤维细胞中分析了SETDB2表达.
- 研究了JAK1,3/STAT3信号通路的参与.
- 检查了亲炎性巨细胞上位体和TNF-α受体抑制的作用.
- 在体内进行了纤维细胞特异性SETDB2倒置和JAK1,3/STAT3抑制.
主要成果:
- 在糖尿病伤口纤维细胞中,SETDB2升高,抑制纤维细胞向肌纤维细胞过渡.
- 瘤坏死因子-α (TNF-α) 通过JAK1,3/STAT3信号增加了SETDB2.
- 有助于炎症的条件可以提高SETDB2的调节,降低肌纤维细胞标志物的调节.
- 对SETDB2或JAK1,3/STAT3的治疗向改善了糖尿病伤口修复和肌纤维细胞基因表达.
结论:
- 在糖尿病伤口中确定了涉及SETDB2的表观遗传机制,用于减少纤维细胞到肌纤维细胞的过渡.
- 在糖尿病伤口纤维细胞中,TNF-α/STAT3/SETDB2轴是这一过程的关键调节者.
- 针对这一轴提供了一个潜在的治疗策略,以增强糖尿病伤口愈合.
更多相关视频
09:16Suppression of Pro-fibrotic Signaling Potentiates Factor-mediated Reprogramming of Mouse Embryonic Fibroblasts into Induced Cardiomyocytes
Published on: June 3, 2018
7.7K
07:49Molecular Analysis of Endothelial-mesenchymal Transition Induced by Transforming Growth Factor-β Signaling
Published on: August 3, 2018
11.7K
相关概念视频
TGF - β Signaling Pathway
10.4K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
10.4K
Introduction to Fibroblasts
3.8K
Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
3.8K
Master Transcription Regulators
7.7K
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
7.7K
General Transcription Factors
6.7K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
6.7K
Co-activators and Co-repressors
8.4K
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
8.4K
Transcription Factors
82.2K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
82.2K
