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相关概念视频

Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

47
Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
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Cardiomyopathy II: Dilated Cardiomyopathy01:30

Cardiomyopathy II: Dilated Cardiomyopathy

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Dilated cardiomyopathy, or DCM, is a progressive myocardial disorder characterized by ventricular chamber dilation and contractile dysfunction.EtiologyVarious factors can cause DCM, including hypertension and heavy alcohol intake, which contribute to the weakening and enlargement of the heart muscle. Viral infections, such as Coxsackievirus B, adenoviruses, and influenza, can lead to DCM by causing inflammation and damage to heart tissue. Certain chemotherapeutic agents, including daunorubicin,...
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Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

Cardiomyopathy IV: Restrictive Cardiomyopathy

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Restrictive cardiomyopathy (RCM) is a rare heart muscle disease characterized by impaired ventricular filling due to stiffened ventricular walls, leading to significant diastolic dysfunction.EtiologyRestrictive cardiomyopathy can arise from both inherited and acquired diseases, many of which are systemic. It is categorized into four main types: infiltrative, storage, non-infiltrative, and endomyocardial diseases.Infiltrative diseases, such as amyloidosis, lead to RCM by depositing amyloid...
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Cardiomyopathy I: Introduction and Classification01:25

Cardiomyopathy I: Introduction and Classification

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Cardiomyopathy, or CMP, is a group of diseases affecting the myocardial structure, impairing its ability to pump blood effectively. This condition can lead to arrhythmias, heart failure, or sudden cardiac death.Cardiomyopathies are classified into primary and secondary categories:Primary Cardiomyopathy refers to conditions involving only the heart muscle that are often idiopathic (of unknown cause) or genetic. They primarily affect the myocardium without the involvement of other systemic...
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Incomplete Dominance01:43

Incomplete Dominance

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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.
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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...
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相关实验视频

Updated: Sep 10, 2025

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
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新型心脏热素-I误解变体 (c.593C>T) 与黄金回收犬的家族性过度肌肉病有关

Victor N Rivas1, Dayna A Goldsmith2, Michael W Vandewege1

  • 1Department of Clinical Sciences, North Carolina State University, College of Veterinary Medicine, Raleigh. (V.N.R., M.W.V., D.V.M., S.M.L., J.A.S.).

Circulation. Genomic and precision medicine
|August 22, 2025
PubMed
概括
此摘要是机器生成的。

在TNNI3基因中发现了一种新的遗传变异,该变异是黄金回归犬中高性心肌病 (HCM) 的原因. 这一发现使得对这种狗心脏病的基因查和预防策略成为可能.

关键词:
年龄较大其他动物心脏衰竭发生变异猪类动物

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科学领域:

  • 遗传学和基因组学
  • 心血管医学
  • 兽医病理学

背景情况:

  • 缩性心肌病 (Hypertrophic cardiomyopathy,简称HCM) 是一种心脏疾病,导致左心室变厚,影响人类和各种动物物种.
  • 虽然众多与HCM相关的突变在人类中已知,但只在猫中发现了少数,而以前没有在狗中发现过.
  • 年轻的黄金回归犬突然心脏病死亡促使对该品种潜在的HCM遗传原因进行调查.

研究的目的:

  • 确定金犬家族中高性心肌病 (HCM) 的遗传基础.
  • 调查受影响家族和扩大犬群内遗传变异的分离.
  • 在瘤水平上探索已识别的变种的分子病变.

主要方法:

  • 在受影响的小狗及其家属身上进行了全基因组测序.
  • 候选变异基因型测定在大量无表型和表型犬群中进行.
  • 用左心室组织免疫光染色来评估蛋白质局部化和表达.

主要成果:

  • 在TNNI3 (心脏热素-I) 基因中发现了一种单独的自体递归误解变异 (c. 593C> T),并与黄金猎犬家族中的HCM分离.
  • 这种TNNI3变异在超过2700只没有表型的狗和45只没有表型的金犬中不存在.
  • 免疫光研究没有显示出异常的TNNI3蛋白在受影响的狗肉瘤中的定位.

结论:

  • 已发现的TNNI3变异是首次报告的任何犬种中与HCM相关的突变.
  • 这一发现为开发黄金回归犬中HCM遗传查测试提供了基础.
  • 这项发现有助于创建HCM研究的转化模型,并有助于早期预防疾病.