非免疫因素导致植入合成心脏门支架中的肌纤维细胞表型延长
Yuriy Snyder1, Fa Tony Mann2, John Middleton2
1Department of Chemical and Biomedical Engineering, University of Missouri, 1406 Rollins Street, Columbia, MO 65211, USA.
Applied materials today
|August 12, 2024
概括
WNT/β-catenin通路显著驱动了类似于膜间歇细胞 (VIC) 的细胞激活和肌纤维细胞形成,而不是炎症或TGF-β1-SMAD2通路.
科学领域:
- 生物材料科学 生物材料科学
- 再生医学是一种再生医学.
- 心血管研究研究心血管研究
背景情况:
- 心脏支架的临床应用受到膜间歇细胞 (VIC) 样细胞激活和肌纤维细胞分化的限制.
- 了解肌纤维细胞表型的分子触发因素对于提高支架功效至关重要.
研究的目的:
- 研究巨诱导炎症,TGF-β1-SMAD2和WNT/β-catenin通路在心脏支架内VIC类细胞激活中的作用.
- 在体内确定主要负责肌纤维细胞表型发育的分子途径.
主要方法:
- 电式心脏门支架植入成年绵羊,长达6个月.
- 在支架透细胞中分析了关键途径标记物的生物分子 (基因和蛋白质) 表达.
主要成果:
- 在6个月内,VIC样细胞和肌纤维细胞标记物增加.
- 大细胞活动在3个月达到峰值,然后下降,这表明它不是主要的驱动因素.
- 起初TGF-β1-SMAD2通路标记物增加,然后下降.
- 在6个月内,WNT/β-catenin路径标记物显著持续增加.
结论:
- WNT/β-catenin通路是驱动人工心脏门支架中VIC类细胞激活和肌纤维细胞表型的主要机制.
- 巨细胞诱导的炎症和TGF-β1-SMAD2信号传递不太可能是长期肌纤维细胞激活的主要驱动因素.
相关概念视频
01:21Myocarditis I: Introduction
Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
01:12Chronic Inflammation: Introduction
Chronic inflammation is a prolonged, dysregulated immune response that persists for weeks to years when the inciting stimulus is difficult to eradicate or when self‑antigens drive ongoing reactivity. Morphologically, it is defined by mononuclear cell infiltration, progressive tissue destruction, and concurrent attempts at healing via angiogenesis and fibrosis. Compared with acute inflammation, edema is less prominent while cellular infiltration predominates; triggers include persistent...