SLC25A42-Related Mitochondrial Disorder: New Cases and Literature Review

Area of Science:

• Biochemistry
• Genetics
• Mitochondrial Biology

Background:

• SLC25A42 encodes a mitochondrial carrier protein crucial for Coenzyme A (CoA) import into mitochondria.
• Pathogenic variants in SLC25A42 are linked to a recently identified mitochondrial disorder.
• The disorder, characterized by encephalomyopathy, exhibits significant clinical variability.

Purpose of the Study:

• To describe the clinical, radiological, and molecular findings of 23 additional individuals with SLC25A42-related mitochondrial disorder.
• To further characterize the phenotypic spectrum and genetic basis of this condition.
• To emphasize the importance of early diagnosis due to variable disease severity.

Main Methods:

• Clinical data collection from 23 new patients across 19 families.
• Radiological assessments of affected individuals.
• Molecular genetic analysis to identify SLC25A42 variants.

Main Results:

• Expansion of the patient cohort to 47 individuals from 35 families.
• Confirmation of extreme variability in disease presentation, ranging from mild to severe encephalomyopathy.
• Identification of additional families with pathogenic SLC25A42 variants, including those with the common founder variant.

Conclusions:

• SLC25A42-related mitochondrial disorder is a significant genetic condition with a broad clinical spectrum.
• Early diagnosis is critical for managing patients and preventing irreversible neurological damage.
• Further research is needed to understand the mechanisms underlying the variable severity.