エンジニアリングされたヒト心臓組織からのカテコラミナージックポリモルフ Ventricular Tachycardia の病原性への洞察
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
まとめ
この研究では,カテコアミナージック多型心室性急性心臓発作 (CPVT) のためのヒト工学心臓組織モデルを開発した. このモデルは,組織レベルでの心律乱を誘発する重要なリン酸化現象を明らかにし,遺伝性心律乱の理解を深めました.
科学分野:
- 心血管研究
- 幹細胞生物学
- 遺伝学
背景:
- 現在の人間の不律律症のモデルでは 組織レベルでの特性を無視して 単細胞に焦点を当てています
- 遺伝変異がヒトの心臓組織の組織レベルの特徴に与える影響は,まだほとんど研究されていない.
研究 の 目的:
- カテコアミナージックポリモルフィック室内鼓動症 (CPVT) の研究のために,光遺伝学に基づいたヒト工学組織モデルを開発する.
- 人間の誘発性多能幹細胞由来心筋細胞とゲノム編集を用いて,組織レベルでCPVTの病原性メカニズムを調査する.
主な方法:
- 誘発性多能性幹細胞由来心筋細胞を用いて 人工的な心筋細胞プラットフォームを作成しました
- CPVTをモデル化し分析するために光遺伝学とゲノム編集 (Cas9) を利用した.
- アリズム障害の進行を評価するために,迅速なペースとカテキオラミンを用いて刺激された人工組織.
主要な成果:
- エンジニアリングされたCPVT組織は ペースとカテキオラミンの刺激で 病状を反映した リエントラントリズムを示した.
- 腹筋カルシウム濃度の上昇とカルシウム波分散の増加が観察され,不律性基質が形成された.
- リアノジン受容体のCa2+/カルモジュリン依存型タンパク質キナーゼII依存型リン酸化が,不律症の可能性を明らかにする上で重要であることが確認された.
結論:
- この研究は,カルモジュリン依存タンパク質キナーゼII依存の組織規模のメカニズムを強調して,CPVTの分子および細胞病原性を明らかにしています.
- この人工組織プラットフォームは 遺伝性心律不整症と 既得性心律不整症をモデル化するための 新しいアプローチを提供します
- 発見は心臓のイオンチャネルにおける遺伝子変異の組織レベルでの影響を洞察する.
関連する概念動画
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


