Overview of genetic mutations causing adrenoleukodystrophy: A case-series study

Area of Science:

• Genetics
• Molecular Biology
• Biochemistry

Background:

• X-linked adrenoleukodystrophy (X-ALD) is a genetic disorder caused by mutations in the ABCD1 gene.
• The ABCD1 gene encodes a peroxisomal transporter protein crucial for very-long-chain fatty acid metabolism.
• X-ALD exhibits diverse clinical severity, necessitating detailed genetic analysis.

Purpose of the Study:

• To investigate the clinical manifestations associated with various ABCD1 gene mutations in Iranian X-ALD patients.
• To identify and characterize novel ABCD1 variants in this population.
• To provide data for improved genetic counseling and understanding of X-ALD heterogeneity.

Main Methods:

• Genetic sequencing of the ABCD1 gene in a cohort of Iranian patients diagnosed with X-ALD.
• Analysis of identified variants to determine their pathogenicity and clinical significance.
• Correlation of genotype with observed clinical phenotypes.

Main Results:

• Six variants within the ABCD1 gene were identified in the studied Iranian patients.
• Five variants were classified as pathogenic or likely pathogenic.
• One novel variant (c.1781-47G>A) was identified and classified as a variant of uncertain significance.

Conclusions:

• This study expands the spectrum of known ABCD1 mutations in Iranian X-ALD patients.
• The findings contribute valuable information for genetic diagnosis and counseling within affected families.
• Understanding genotype-phenotype correlations aids in predicting disease progression and management.