瘤亡因子-α的病理生理相关度在老鼠中促进左心室进展性功能障碍和重塑
B Bozkurt1, S B Kribbs, F J Clubb
1Department of Medicine, Veterans Administration Medical Center, Baylor College of Medicine, Houston, Tex 77030, USA.
Circulation
|May 13, 1998
概括
在心力衰竭患者中瘤坏死因子-α (TNF-alpha) 的升高会导致心脏功能障碍. 这项研究表明,TNF-alpha注入大鼠导致心脏问题,这些问题是可逆的,这表明TNF-alpha模仿心力衰竭表型.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 病理生理学 病理生理学
背景情况:
- 患有心力衰竭的患者表现出循环瘤缩因子-α (TNF-α) 的增加.
- 从病理生理学上相关的TNF-α度对心脏结构和功能的直接影响仍然不清楚.
研究的目的:
- 在大鼠模型中研究持续,病理生理学相关的TNF-α度对心脏结构和功能的影响.
- 为了确定TNF-α诱导的心脏变化是否可逆.
主要方法:
- 连续输注TNF-alpha或稀释剂通过透给大鼠,以达到与心力衰竭相关的全身水平.
- 使用二维心声学评估左心室 (LV) 结构和功能.
- 评价隔离心脏肌细胞机制和LV细胞外矩阵组成.
主要成果:
- 持续的TNF-α输液导致了依赖时间的LV功能下降和肌细胞缩短.
- 在接受TNF-α治疗的老鼠中观察到心脏扩张和重塑.
- 这些有害影响在去除或服用TNF-α对抗剂 (TNFR:Fc) 后是部分可逆的.
结论:
- 从病理生理学上相关的TNF-α度足以诱导心脏功能障碍和结构变化.
- 这些发现表明TNF-alpha在心力衰竭表型的发展中起着重要作用.
- 这些效应的可逆性凸显了心力衰竭的潜在治疗点.
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...
01:29Heart Failure II: Pathophysiology
Systolic Heart Failure and Compensatory MechanismsSystolic heart failure (also termed HFrEF, Heart Failure with Reduced Ejection Fraction) is the most prevalent type of heart filure. It results in a decreased volume of blood being pumped from the ventricle. The aortic arch and carotid sinuses have baroreceptors that detect reduced blood pressure, triggering the sympathetic nervous system (SNS) to release epinephrine and norepinephrine. Initially, this response aims to boost heart rate and...