Familial hypertrophic cardiomyopathy. Microsatellite haplotyping and identification of a hot spot for mutations in the beta-myosin heavy chain gene.
Population
Two French pedigrees (720 and 730) with familial hypertrophic cardiomyopathy (FHC)
Design
Other
Authors
Discussion
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Member takes
Implication
May guide FHC genetic testing panels; leaves open validation of 403Arg mutation risk.
Key Points
- This research aims to identify mutations in the beta-myosin heavy chain gene associated with familial hypertrophic cardiomyopathy (FHC).
- Performed linkage analysis on two French FHC pedigrees using microsatellite markers in the beta-myosin heavy chain gene.
- Conducted haplotype analysis of six polymorphic markers to identify affected and unaffected individuals.
- Used direct sequencing to discover two novel missense mutations in exon 13.
- Identified significant linkage with MYO I and MYO II for pedigree 720; inconclusive results for pedigree 730.
- Discovered two novel missense mutations: 403Arg-->Leu associated with severe cardiac events and 403Arg-->Trp with less severity.
- Confirmed codon 403 as a mutation hot spot in the beta-myosin heavy chain gene.
Structured PICO
P
Population
Two French pedigrees (720 and 730) with familial hypertrophic cardiomyopathy (FHC)
I
Intervention
Microsatellite haplotyping, linkage analysis, and direct sequencing of the beta-myosin heavy chain gene
O
Outcome
Identification of disease-causing mutations and carrier statussurrogate
Haplotyping of polymorphic markers linked to the beta-myosin heavy chain gene enables rapid detection of FHC carrier status and identifies codon 403 as a mutation hot spot.
Cite This Study
Dausse et al. (1993) studied this question.