X-linked Adrenoleukodystrophy, The Tunisian Experience.

Area of Science:

• Biochemistry
• Genetics
• Neurology

Background:

• X-linked adrenoleukodystrophy (X-ALD) is a genetic disorder impacting very long-chain fatty acid metabolism.
• This study focuses on Tunisian patients, detailing their clinical and biochemical profiles.

Purpose of the Study:

• To characterize the clinical phenotype and biochemical features of X-ALD in Tunisian patients.
• To evaluate pattern analysis of plasma very long-chain fatty acids for visual discrimination of X-ALD patients.

Main Methods:

• Diagnosis of 19 X-ALD patients over 21 years using clinical data and gas chromatography of specific fatty acid ratios (C26:0/C22:0, C24:0/C22:0).
• Transformation of biochemical marker values into visual patterns for improved diagnostic accuracy.

Main Results:

• Clinical presentations included cerebral (57.8%) and adrenomyeloneuropathic (26.3%) forms, with some asymptomatic cases.
• Elevated C24:0/C22:0 and C26:0/C22:0 ratios were observed in patients compared to normal values.
• Scatter plot analysis proved effective for visually distinguishing X-ALD patient fatty acid profiles.

Conclusions:

• X-ALD appears underdiagnosed in Tunisia.
• While enzymatic and molecular studies confirm diagnosis, gas chromatography of very long-chain fatty acids is crucial for early detection and treatment.