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Alcohol-Induced Sudden Cardiac Death in a Teenager With PPA2 Gene Mutations
Sydney Graham1, Diane C Peterson2, Christine James2
1From the Arkansas College of Osteopathic Medicine, Fort Smith, AR.
Summary
Sudden cardiac death in a young woman was linked to PPA2 gene mutations. These mutations disrupt mitochondrial ATP production, especially when combined with alcohol, leading to heart failure.
Area of Science:
- Genetics
- Cardiology
- Biochemistry
Background:
- The PPA2 gene encodes mitochondrial pyrophosphatase, crucial for cellular energy production.
- Mutations in PPA2 are inherited in an autosomal recessive manner.
- PPA2 dysfunction can lead to mitochondrial ATP production failure and cardiac stress.
Observation:
- A 19-year-old female with a history of alcohol intolerance died suddenly after minimal alcohol consumption.
- Autopsy revealed significant cardiac abnormalities, including left ventricular and septal fibrosis.
- Histology showed hypertrophied myocytes with some pleomorphic nuclei.
Findings:
- Postmortem genetic analysis identified heterozygous PPA2 mutations: c.683C>T (p.Pro228Leu) and a novel variant c.814C>T (p.His272Tyr).
- The novel variant of undetermined significance is proposed as pathogenic given the patient's phenotype.
- These mutations likely impaired mitochondrial function, contributing to cardiac pathology.
Implications:
- This case highlights a potential genetic predisposition to sudden cardiac death associated with PPA2 mutations.
- The findings underscore the critical interaction between genetic factors, alcohol consumption, and cardiovascular health.
- Further research into PPA2 variants is warranted to understand their role in inherited cardiomyopathies.
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