相关实验视频
Updated: Jun 24, 2025

07:59
Functional Characterization of Endogenously Expressed Human RYR1 Variants
Published on: June 9, 2021
2.5K
在一个具有新型RYR2 E4107A变体的家庭中,不同的表现形式表现
Hiroshi Hasegawa1, Shuntaro Tamura1, Tadashi Nakajima1
1Department of Cardiovascular Medicine, Gunma University Graduate School of Medicine.
International heart journal
|June 2, 2024
概括
单一的RYR2基因变异可以导致不同的心脏病,包括儿科胺基多态心室性心力衰竭 (CPVT) 和释放缺陷综合征 (CRDS). 基因检测对于识别有风险的个体至关重要,因为标准检测可能不会揭示所有潜在的心律失常.
科学领域:
- 心血管遗传学 心血管遗传学
- 分子心脏病学分子心脏病学
- 心脏电生理学 心脏电生理学
背景情况:
- 功能获取RYR2突变导致CPVT,而功能丧失突变定义CRDS,可能包括与RYR2相关的LQTS.
- 诊断CRDS具有挑战性,因为患者可能不会表现出运动或上腺素诱导的心律失常,与CPVT不同.
- 一个具有RYR2 E4107A变异的家族呈现出不同的临床表型,突出了诊断复杂性.
研究的目的:
- 在父子队列中研究与RYR2 E4107A变异相关的表型变异性.
- 确定运动压力测试 (EST) 和上腺素刺激测试 (EPT) 在RYR2相关心脏疾病中的诊断效用.
- 强调基因分析在CPVT和CRDS级联查中的必要性.
主要方法:
- 对一个患有RYR2 E4107A变异的父亲和儿子的临床评估.
- 运动压力测试 (EST) 和上腺素诱导测试 (EPT) 的表现.
- 电心电图 (ECG) 监测,包括QTc间隔测量和心律失常检测.
主要成果:
- 儿子在EPT期间表现出LQTS (或CRDS) 现型与QTc延长,尽管在EST或EPT上没有心律失常.
- 父亲呈现了CPVT表型,在EST期间经历多焦点过早心室收缩 (PVCs) 和双向PVCs,具有正常的QTc.
- 显而易见的临床表现强调了除了RYR2变种本身之外的因素的影响.
结论:
- 单个RYR2变异可以表现为CPVT或LQTS/CRDS,表明复杂的基因型-表型相关性.
- 由于EST和EPT不足以诊断所有与RYR2相关的心律失常,因此需要进行遗传查.
- 未确定的遗传,表观遗传,环境因素和衰老可能导致RYR2相关通道病变的不同临床结果.
相关概念视频
Pleiotropy
40.4K
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
40.4K
Genetic Lingo
102.7K
Overview
102.7K
Epistasis
46.7K
In addition to multiple alleles at the same locus influencing traits, numerous genes or alleles at different locations may interact and influence phenotypes in a phenomenon called epistasis. For example, rabbit fur can be black or brown depending on whether the animal is homozygous dominant or heterozygous at a TYRP1 locus. However, if the rabbit is also homozygous recessive at a locus on the tyrosinase gene (TYR), it will have an unshaded coat that appears white, regardless of its TYRP1...
46.7K
Multiple Allele Traits
34.2K
The Concept of Multiple Allelism
34.2K
Translation
14.8K
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of Life
Proteins are...
Translation Produces the Building Blocks of Life
Proteins are...
14.8K
Pedigree Analysis
84.2K
Overview
84.2K

