从人造心脏组织中了解 катехоламинергия多态心室慢心病的发病原因
Sung-Jin Park1, Donghui Zhang2,3, Yan Qi2
1Disease Biophysics Group, Wyss Institute for Biologically Inspired Engineering, John A. Paulson School of Engineering and Applied Sciences (S.-J.P., K.Y.L., S.L.K., F.S.P., P.H.C., K.K.P.), Harvard University, Cambridge, MA.
Circulation
|July 18, 2019
概括
这项研究开发了一种针对多样性心室高心率 (CPVT) 的人体工程心脏组织模型. 该模型揭示了一个关键的酸化事件,导致组织水平上的心律失常,进步了解遗传性心律失常.
科学领域:
- 心血管研究
- 干细胞生物学
- 遗传学
背景情况:
- 目前的人类心律失常的模型通常集中在单个细胞上,忽视组织层面的突发性质.
- 遗传突变对人类心脏组织组织水平特征的影响在很大程度上尚未被探索.
研究的目的:
- 开发一种基于光遗传学的人体工程组织模型,用于研究多态心室性心跳动 (CPVT).
- 使用人类诱导的多能干细胞衍生心肌细胞和基因组编辑来研究CPVT的致病机制.
主要方法:
- 使用诱导多能干细胞衍生的心肌细胞创建了一个人造心肌平台.
- 使用光遗传学和基因组编辑 (Cas9) 来建模和分析CPVT.
- 用快速节奏和甲醇胺来评估心律失常的刺激工程组织.
主要成果:
- 工程 CPVT 组织表现出在节奏和类甲醇胺刺激下, 反映疾病特征.
- 观察到腹筋水平升高和波分散增加,形成心律失常基质.
- 确定了赖诺丁受体的Ca2+/calmodulin-dependent蛋白激酶II-dependent酸化,这对于揭示心律失常的潜力至关重要.
结论:
- 这项研究阐明了CPVT的分子和细胞致病性,强调了组织规模机制中的calmodulin- dependent蛋白激酶II- dependent重新进入.
- 这种工程组织平台为遗传性和获得性心律失常提供了一种新的方法.
- 这些发现提供了对心脏离子通道遗传突变的组织层面影响的见解.
相关概念视频
Anatomy of the Heart
119.5K
The human heart is made up of three layers of tissue that are surrounded by the pericardium, a membrane that protects and confines the heart. The outermost layer, closest to the pericardium, is the epicardium. The pericardial cavity separates the pericardium from the epicardium. Beneath the epicardium is the myocardium, the middle layer, and the endocardium, the innermost layer. There are four chambers of the heart: the right atrium, the right ventricle, the left atrium, and the left ventricle.
119.5K
Asthma: Pathogenesis and Management
1.3K
Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
1.3K
Cystic Fibrosis: Pathogenesis
740
Cystic fibrosis (CF), an autosomal recessive disorder, significantly affects the function of exocrine glands. This genetically inherited disease is characterized by the production of thick and sticky mucus, which can severely affect various organs and systems in the body.
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
740
Pulmonary Hypertension: Classification and Pathogenesis
593
Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
There are various classifications for PH, each relating to different underlying causes and also...
There are various classifications for PH, each relating to different underlying causes and also...
593
Single Nucleotide Polymorphisms-SNPs
18.0K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
18.0K
What is Genetic Engineering?
79.8K
Overview
79.8K


