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Lethal Alleles

Lethal Alleles

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...

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Related Experiment Video

Updated: May 26, 2025

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

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

Published on: August 8, 2022

Cardiac phenotypes in LMNA mutations.

¹Center for Cardiovascular Genetics, Institute of Molecular Medicine and Department of Medicine, University of Texas Health Sciences Center at Houston, Houston, Texas, USA.

Current Opinion in Cardiology

|February 25, 2025

Summary

This summary is machine-generated.

LMNA mutations cause diverse heart conditions like dilated cardiomyopathy (DCM) and arrhythmias by affecting nuclear stability. Personalized care and targeted therapies are key for managing these complex genetic heart diseases.

Keywords:

genetic cardiomyopathy heart failure

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Last Updated: May 26, 2025

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Area of Science:

Cardiovascular Medicine
Molecular Genetics
Cell Biology

Background:

Mutations in the LMNA gene are linked to a spectrum of inherited cardiac conditions.
Understanding the molecular basis of these mutations is crucial for diagnosis and treatment.

Purpose of the Study:

To review the diverse cardiac manifestations associated with LMNA mutations.
To explore the underlying molecular mechanisms and clinical implications of these mutations.
To highlight the importance of understanding these phenotypes for advancing patient care.

Main Methods:

Review of recent scientific literature on LMNA mutations and cardiac phenotypes.
Analysis of findings from mouse models elucidating disease pathways.
Examination of advances in genetic screening and risk stratification.

Main Results:

LMNA mutations disrupt nuclear envelope stability, triggering DNA damage response and affecting chromatin organization and mechanotransduction.
Dysfunctional LMNA pathways contribute to cardiac fibrosis, arrhythmias, and myocardial remodeling, with fibroblasts playing a significant role.
Genetic screening advances emphasize early identification and risk stratification for arrhythmias and sudden cardiac death.

Conclusions:

The wide range of LMNA-related cardiac phenotypes necessitates personalized treatment strategies.
Integrating molecular and clinical research insights can lead to targeted therapies to improve patient outcomes.
Future research should focus on translational studies of molecular mechanisms, genotype-phenotype correlations, and refining therapeutic interventions.