Successful Diagnosis of Sengers Syndrome Using a Comprehensive Genomic Analysis

Area of Science:

• Genetics
• Molecular Biology
• Medical Diagnostics

Background:

• Sengers syndrome is an autosomal recessive mitochondrial DNA depletion syndrome.
• It is characterized by hypertrophic cardiomyopathy, congenital cataracts, skeletal myopathy, exercise intolerance, and lactic acidosis.
• Acylglycerol kinase (AGK) gene dysfunction causes Sengers syndrome, with known variants reported.

Purpose of the Study:

• To accurately diagnose Sengers syndrome in a patient.
• To identify pathogenic variants in the acylglycerol kinase (AGK) gene.
• To investigate complex genetic variations contributing to Sengers syndrome.

Main Methods:

• Utilized comprehensive genomic analysis, including whole-genome sequencing and RNA sequencing.
• Employed various bioinformatics tools for data analysis.
• Focused on identifying variants within the acylglycerol kinase (AGK) gene.

Main Results:

• Successfully diagnosed Sengers syndrome in the patient.
• Detected a known pathogenic variant in the AGK gene.
• Identified a previously unreported large deletion in the AGK gene within a segmental duplication.

Conclusions:

• Combined genomic approaches are effective for diagnosing Sengers syndrome.
• This strategy is particularly useful for complex genetic variations like large deletions in segmental duplications.
• The findings enhance the diagnostic accuracy for Sengers syndrome.