解读心脏缩和心脏衰竭的转录动态,以特定于腔室的方式
Dan Zhang1, Jianming Liu1, Haiying Xiao2
1Key Laboratory of Medical Electrophysiology, Ministry of Education and Medical Electrophysiological Key Laboratory of Sichuan Province, and Collaborative Innovation Center for Prevention of Cardiovascular Diseases, Institute of Cardiovascular Research, Southwest Medical University, Luzhou, China.
Biomolecules & biomedicine
|June 19, 2023
概括
这项研究确定了压力过载后病理性心脏缩 (CH) 和心力衰竭 (HF) 中的关键基因和途径. 它强调了这些动态心脏重塑过程的共享分子机制和潜在生物标志物.
科学领域:
- 心血管生物学 心血管生物学
- 分子心脏病学分子心脏病学
- 基因组学就是基因组学.
背景情况:
- 病理性心脏缩 (CH) 和随后的心力衰竭 (HF) 是压力过载造成的,涉及复杂的心脏重塑.
- 从CH转变为HF的确切生物学机制尚不完全理解.
- 识别关键的基因和通路对于理解和潜在地治疗这些疾病至关重要.
研究的目的:
- 为了确定与CH和HF相关的差异表达基因 (DEGs),在主动脉弧收缩 (TAC) 后的不同心室中.
- 调查从CH到HF的动态过渡期间的共享和独特的分子机制.
- 确定潜在的基因生物标志物和参与心脏重塑的必要枢纽基因.
主要方法:
- 利用压力过载 (大动脉弧收缩) 的小鼠模型.
- 在TAC后4周 (CH) 和6周 (HF) 进行全心转录组分析,以确定左心室 (LA),左心室 (LV) 和右心室 (RV) 中的DEG.
- 进行了功能丰富分析,并确定了枢纽基因.
主要成果:
- 在所有三个心室中确定了大量的CH和HF的DEG.
- 在室内发现共享的DEG (例如,弹性质,HBB-BS) 和在CH和HF中共同的LA/LV和LV/RV的特定DEG.
- 突出了细胞外矩阵和肉的作用,并确定了LOX,FGF和NDUF家族作为CH到HF过渡中的关键枢纽基因.
结论:
- 这项研究提供了一个全面的心脏重塑的转录形态景观,从CH到HF的进展过程中.
- 已识别的DEG和枢纽基因为诊断和理解心脏功能的动态变化提供了潜在的生物标志物.
- 这些发现阐明了关键的分子通路,包括细胞外基质和肉膜的参与,这对于心脏重塑至关重要.
相关概念视频
01:29Heart Failure II: Pathophysiology
16
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...
16
01:17Pathophysiology of Heart Failure
1.7K
Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
1.7K
01:29Cardiomyopathy III: Hypertrophic Cardiomyopathy
17
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
17