在一般人群中罕见的渐进性心脏导电性疾病变体的表型表现
Ravi A Shah1, Julia Ramírez2,3,4, Claire Kirkby5
1Institute of Cardiovascular Science, University College London, London, United Kingdom.
概括
对家族性渐进性心脏导电性疾病 (PCCD) 的罕见变异增加了疾病风险. 将多基因风险评分 (PRS) 与变异状态相结合,可以提高对导电缺陷的预测.
科学领域:
- 心血管遗传学 心血管遗传学
- 人类遗传学 人类遗传学
- 人口健康 人口健康
背景情况:
- 家族性渐进性心脏导电性疾病 (PCCD) 是一种遗传性疾病,导致导电缺陷,可能需要起器.
- 在一般人群中,罕见的PCCD变异的流行率及其与心电图 (ECG) 特征多基因风险得分 (PRS) 的相关性仍然不清楚.
研究的目的:
- 确定大量人口队列中罕见的PCCD相关变异的流行率和表型表达.
- 评估ECG特征PRS是否可以改善心脏导电疾病风险预测.
主要方法:
- 在英国生物银行队列 (n=469,511) 中发现了罕见致病/可能致病 (P/LP) PCCD变体和不确定的变体 (VUS) 的携带者.
- 评估了使用Cox比例危险模型的初级 (任何导电疾病) 和二次 (高度AV阻塞,心脏起器植入) 结果.
- 将罕见变异状态,性别,年龄,PR和QRSPRS纳入风险预测模型.
主要成果:
- 发现了25个P/LP载体和3174个VUS载体. 携带P/LP的携带者表现出传导性疾病的明显更高的患病率 (28%对5.3%,p<0.001),危险率为6.60.
- 高度AV阻塞 (HR 23.2) 和心脏起器植入 (HR 13.4) 是P/LP载体风险增加的关键驱动因素,诊断发生在50岁以后.
- 将PR-PRS和QRS-PRS与P/LP状态相结合,改善了模型的性能 (C指数为0.618).
结论:
- 携带罕见PCCD P/LP变异的携带者在基于人口的队列中面临患传导性疾病的风险较高.
- 包括PR和QRSPRS可以提高对心脏导电疾病风险的预测.
- 结合罕见变异和常见变异多基因风险评分的评估,可以提供一种更全面的风险分层方法.
更多相关视频
03:45Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
3.0K
09:36Dual-Dye Optical Mapping of Hearts from RyR2R2474S Knock-In Mice of Catecholaminergic Polymorphic Ventricular Tachycardia
Published on: December 22, 2023
1.1K
相关概念视频
Pathophysiology of Heart Failure
1.4K
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...
1.4K
Electrophysiology of Normal Cardiac Rhythm
1.8K
The normal cardiac rhythm is a synchronized electrical activity that facilitates the regular and coordinated contraction of the heart muscle. This process is essential for efficient blood circulation throughout the body. The fundamental elements involved in establishing and maintaining this rhythm include the unique electrical properties of cardiac muscle cells, the sinoatrial (SA) node's pacemaker function, the specialized conducting system, and the ionic mechanisms underlying each phase...
1.8K
Cardiac Action Potential
643
Cardiac action potentials are essential for proper heart function, enabling the rhythmic contractions needed for adequate blood circulation. Nodal cells and Purkinje fibers, specialized for electrical conduction, generate these action potentials.
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
The cardiac action potential process involves a series of phases characterized by the movement of ions across the cardiac cell membranes, leading to the depolarization and repolarization of the cardiac myocytes.
Ionic Basis of Cardiac Action Potentials
643
Mechanism of Cardiac Arrhythmias
856
Arrhythmias are irregular heart rhythms occurring when the heart's electrical impulses become abnormal. These disturbances can lead to various symptoms, depending on their severity and the underlying cause. Some common factors contributing to arrhythmias include hypoxia, ischemia, electrolyte imbalances, excessive catecholamine exposure, drug toxicity, and muscle overstretching. Arrhythmias can be classified into two main types based on the rate and site of origin of abnormal heart rhythms.
856
Incomplete Dominance
20.4K
Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
20.4K
Genetic Lingo
98.5K
Overview
98.5K
