历史病原性拉米纳A/C创始变异的临床和代谢后果
L Y Wong1,2, T Torfs3,4, S J V Vanherle1
1Department of Clinical Genetics, Maastricht University Medical Center+, Maastricht, the Netherlands.
Scientific reports
|July 3, 2025
概括
一种新的LMNA基因变异在家庭中引起严重扩张性心肌病 (DCM),在晚年出现心脏功能障碍. 这种创始变异影响核结构和心肌细胞功能.
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
- 遗传流行病学遗传流行病学
背景情况:
- 扩张性心肌病 (DCM) 是心力衰竭的主要原因.
- LMNA基因的突变是遗传性心肌病的已知原因之一.
- 创始人变异可以为疾病机制和种群遗传学提供独特的见解.
研究的目的:
- 在多个DCM家族中发现的一种新型LMNA变异的特征.
- 研究这种特定LMNA变异的临床表现,遗传起源和细胞影响.
- 了解心肌细胞中LMNA p.(Glu105Leu) 变异的功能后果.
主要方法:
- 对795名DCM患者和五个家庭的基因分析.
- 临床数据收集和时间到事件分析.
- 使用患者纤维细胞,诱导多能干细胞衍生心肌细胞 (iPSC-CMs) 和心脏组织进行细胞和组织分析.
主要成果:
- 一种新的LMNA p.(Glu105Leu) 变异被确定为五个家族的创始突变,起源于650年前.
- 试验对象通常在60多岁时出现严重的DCM,晚期加多增强率高,心律失常和导电障碍.
- 来自患者的iPSC-CMs显示核异常,体组织失调,改变葡萄糖代谢,线粒体功能受损和收缩延迟.
结论:
- 这种LMNA p.(Glu105Leu) 变种是致病的,并导致晚期发病的独特形式的DCM.
- 这种变异显著影响心肌细胞结构,新陈代谢和功能.
- 这些发现凸显了LMNA在维持心脏细胞完整性和功能方面的重要性.
相关概念视频
Cystic Fibrosis: Pathogenesis
369
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,...
369
Animal Mitochondrial Genetics
8.1K
Among all the organelles in an animal cell, only mitochondria have their own independent genomes. Animal mitochondrial DNA is a double-stranded, closed-circular molecule with around 20,000 base pairs. Mitochondrial DNA is unique in that one of its two strands, the heavy, or H, -strand is guanine rich, whereas the complementary strand is cytosine rich and called the light, or L, -strand. Compared to nuclear DNA, mitochondrial DNA has a very low percentage of non-coding regions and is marked by...
8.1K
Lysosomal Hydrolases
3.9K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.9K
Lethal Alleles
15.7K
Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
15.7K
COPD: Pathogenesis and Clinical Features
533
Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
533


