Related Experiment Video

Updated: Jul 10, 2026

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
03:45

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model

Published on: August 8, 2022

Deletion in TNNI3 gene is associated with restrictive cardiomyopathy

Anna Kostareva, Alexandra Gudkova, Gunnar Sjöberg

    International Journal of Cardiology
    |November 17, 2007
    PubMed

    Insights

    A novel mutation in the cardiac troponin I gene (TNNI3) causes restrictive cardiomyopathy (RCM). This genetic defect leads to reduced troponin I levels and fatal heart failure in young adults.

    Area of Science:

    • Cardiology
    • Genetics
    • Molecular Biology

    Background:

    • Dilated and hypertrophic cardiomyopathies have numerous identified disease-causing genes.
    • Restrictive cardiomyopathy (RCM) has fewer known genetic causes, primarily desmin and cardiac troponin I (TNNI3).

    Observation:

    • A novel one-nucleotide deletion in the TNNI3 gene was identified in a patient with RCM.
    • This deletion causes a frameshift, premature stop codon, and truncation of the TNNI3 protein's C-terminal portion.

    Findings:

    • Western blot analysis revealed a ~50% reduction in myocardial troponin I content.
    • The patient presented with restrictive cardiac hemodynamics and congestive heart failure.

    Implications:

    • This study identifies a new genetic cause for restrictive cardiomyopathy.
    • The findings highlight the critical role of TNNI3 in cardiac function and underscore the potential for severe outcomes from its mutations.

    More Related Videos

    Tissue Triage and Freezing for Models of Skeletal Muscle Disease05:58

    Tissue Triage and Freezing for Models of Skeletal Muscle Disease

    Published on: July 15, 2014

    In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila06:41

    In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila

    Published on: August 20, 2019

    Related Concept Videos

    Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

    Cardiomyopathy III: Hypertrophic Cardiomyopathy

    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...
    Cardiomyopathy IV: Restrictive Cardiomyopathy01:29

    Cardiomyopathy IV: Restrictive Cardiomyopathy

    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...
    Notch Signaling Pathway03:14

    Notch Signaling Pathway

    The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
    The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
    Myocarditis I: Introduction01:21

    Myocarditis I: Introduction

    Myocarditis is inflammation of the myocardium, which is the muscular layer of the heart.EtiologyMyocarditis has a diverse etiology, including a wide range of infectious and non-infectious causes:Infectious CausesViral: Common viruses include Coxsackie A and B, adenovirus, parvovirus B19, enteroviruses, and influenza A.Bacterial: Examples include infections caused by Streptococcus, Staphylococcus, and Mycoplasma species.Rickettsial: Infections like Rocky Mountain spotted fever can result in...
    Cardiomyopathy II: Dilated Cardiomyopathy01:30

    Cardiomyopathy II: Dilated Cardiomyopathy

    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,...
    Cardiomyopathy I: Introduction and Classification01:25

    Cardiomyopathy I: Introduction and Classification

    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...