Related Experiment Video
Updated: Apr 5, 2026

Optimized Protocol for the Extraction of Proteins from the Human Mitral Valve
Published on: June 14, 2017
Genetic association analyses highlight biological pathways underlying mitral valve prolapse
Christian Dina1,2, Nabila Bouatia-Naji3,4, Nathan Tucker5
1INSERM Unité Mixte de Recherche (UMR) 1087, Centre National de la Recherche Scientifique (CNRS) UMR 6291, Institut du Thorax, Nantes, France.
This study identified the first genetic risk loci for nonsyndromic mitral valve prolapse (MVP), a common heart valve condition. Findings suggest new mechanisms contributing to mitral regurgitation, a primary cause of valve repair.
Area of Science:
- Cardiovascular Genetics
- Molecular Cardiology
- Genomics
Background:
- Nonsyndromic mitral valve prolapse (MVP) is a prevalent cardiac valvulopathy with unknown genetic underpinnings.
- Existing evidence suggests a complex inheritance pattern for MVP, predisposing to serious complications like heart failure and sudden death.
Purpose of the Study:
- To identify genetic risk loci associated with nonsyndromic mitral valve prolapse (MVP).
- To investigate potential candidate genes and their functional roles in valve development and disease.
Main Methods:
- A meta-analysis of two genome-wide association studies (GWAS) involving 1,412 MVP cases and 2,439 controls.
- Replication of identified loci in a larger cohort (1,422 cases and 6,779 controls).
- Functional studies in zebrafish and mice, including gene knockdown and analysis of knockout models.
Main Results:
- Identification and replication of six novel genetic loci associated with MVP.
- Functional evidence implicating LMCD1 and TNS1 in atrioventricular valve function.
- Demonstration of TNS1's role in valve morphogenesis and cytoskeleton organization, with observed leaflet abnormalities in Tns1(-/-) mice.
Conclusions:
- This research presents the first genetic risk loci for nonsyndromic mitral valve prolapse.
- The findings propose novel molecular mechanisms underlying mitral valve regurgitation, a common indication for surgical repair.
More Related Videos
07:15Determining the Likelihood of Variant Pathogenicity Using Amino Acid-level Signal-to-Noise Analysis of Genetic Variation
Published on: January 16, 2019
07:42An Image Guided Transapical Mitral Valve Leaflet Puncture Model of Controlled Volume Overload from Mitral Regurgitation in the Rat
Published on: May 19, 2020
Related Concept Videos
Mitral Valve Prolapse I: Introduction
Mitral Valve Prolapse II: Assessment and Management
Mitral Stenosis I: Introduction
Mitral Regurgitation I: Introduction
Mitral Stenosis II: Clinical features and Diagnostic Tests
Mitral Valve Prolapse III: Nursing Management