ERK3参与调节心脏纤维细胞功能.
Pramod Sahadevan1,2, Dharmendra Dingar1,2, Sherin A Nawaito1,3,4
1Montreal Heart Institute, Montréal, Québec, Canada.
Physiological reports
|June 14, 2024
概括
细胞外信号调节激酶3 (ERK3) 缺乏会减少心脏缩并改善雄性小鼠的纤维细胞功能. 这表明ERK3对于心脏纤维细胞生物学和心脏重塑至关重要.
科学领域:
- 分子生物学分子生物学
- 心血管生理学心血管生理学
- 细胞生物学 细胞生物学
背景情况:
- ERK3/MAPK6激活了MAP激酶激活的蛋白激酶 (MK) -5.
- 在雄性小鼠中MK5缺乏导致心脏缩和纤维细胞功能受损.
- ERK3在心脏缩和纤维细胞生物学中的作用需要进一步研究.
研究的目的:
- 为了确定ERK3减少对心脏缩后横向大动脉收缩 (TAC) 的影响.
- 研究ERK3对雄性小鼠心脏纤维细胞生物学的影响.
主要方法:
- 雄性ERK3-haplodeficient小鼠接受了TAC手术.
- 同免疫沉被用于评估ERK3-MK5相互作用.
- 分析了心脏功能,缩和原mRNA水平.
- 在孤立的心脏纤维细胞中进行了siRNA介导的ERK3淘汰.
主要成果:
- 在TAC后的心脏溶解物中,ERK3与MK5共免疫降落.
- 在TAC小鼠中,ERK3的哈普洛缺陷减轻了心脏缩和降低了Col1a1mRNA的增加.
- ERK3敲击降低了TGF-β诱导的Col1a1mRNA表达,并降低了纤维细胞运动.
结论:
- ERK3在调节心脏缩和纤维细胞功能方面发挥着重要作用.
- ERK3参与原蛋白的产生和纤维细胞的运动.
- 这些发现突出了ERK3作为心脏重塑中的潜在治疗点.
相关概念视频
01:09Introduction to Fibroblasts
3.1K
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...
3.1K
01:24Regulation of Angiogenesis and Blood Supply
2.5K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.5K