Key result
Novel mtDNA tRNAIle mutation linked to maternally inherited HCM presenting as pure heart disease.
Observational
Mitochondrial DNA defects, such as the novel nt. 4300 mutation in the tRNAIle gene, should be considered in the differential diagnosis of hypertrophic cardiomyopathy, especially with maternal inheritance.
May warrant mtDNA testing in maternal HCM; leaves open validation of pathogenicity and prevalence.
A novel mtDNA mutation at position nt. 4300 in the tRNAIle gene is associated with hypertrophic cardiomyopathy inherited as a maternal trait. Interestingly, this mutation seems to cause a pure heart disease as opposed to most other mtDNA mutations, which are associated with multisystemic disorders. Hypertrophic cardiomyopathies are genetically heterogeneous, and mtDNA defects should be considered in the differential diagnosis, especially when there is evidence of maternal inheritance.
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Casali et al. (1995) conducted an observational in Hypertrophic cardiomyopathy. mtDNA mutation at position nt. 4300 in the tRNAIle gene was evaluated on Hypertrophic cardiomyopathy. A novel mtDNA mutation at position nt. 4300 in the tRNAIle gene is associated with maternally inherited hypertrophic cardiomyopathy presenting as a pure heart disease.
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