Adrenoleukodystrophy

Definition:

Adrenoleukodystrophy (ALD) is an X-linked disorder caused by mutation in the ABCD1 gene that encodes ABCD1/ALDP, a peroxisomal ABC transporter. ALD is biochemically characterized by the accumulation of saturated very long chain fatty acids (VLCFA) in tissues such as adrenal cortex and white matter of central nervous system. The phenotypes can be subdivided into four main categories: Childhood cerebral adrenoleukodystrophy (CCALD), adrenomyeloneuropathy (AMN), Addison-only ALD, and asymptomatic ALD. This disorder is characterized by progressive behavioral, cognitive and neurologic deficit.

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