alexa Adrenoleukodystrophy | Australia| PDF | PPT| Case Reports | Symptoms | Treatment

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Adrenoleukodystrophy

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  • Adrenoleukodystrophy

    The genetic bases for all different phenotypic variants of X-ALD are mutations in the gene encoding the peroxisomal ATP-binding cassette (ABC) transporter, ABCD1 (formerly adrenoleukodystrophy protein, ALDP). ABCD1 transports CoA-activated very long-chain fatty acids from the cytosol into the peroxisome for degradation. The phenotypic variability is remarkable ranging from cerebral inflammatory demyelination of childhood onset, leading to death within a few years, to adults remaining pre-symptomatic through more than five decades. There is no general genotype-phenotype correlation in X-ALD.

  • Adrenoleukodystrophy

    The genetic bases for all different phenotypic variants of X-ALD are mutations in the gene encoding the peroxisomal ATP-binding cassette (ABC) transporter, ABCD1 (formerly adrenoleukodystrophy protein, ALDP). ABCD1 transports CoA-activated very long-chain fatty acids from the cytosol into the peroxisome for degradation. The phenotypic variability is remarkable ranging from cerebral inflammatory demyelination of childhood onset, leading to death within a few years, to adults remaining pre-symptomatic through more than five decades. There is no general genotype-phenotype correlation in X-ALD.

  • Adrenoleukodystrophy

    Study design was a retrospective review of records collected over a 15-year period, the setting was an international referral laboratory for the study of metabolic disease, and the subjects were all known cases of ALD diagnosed in Australia and New Zealand between 1981 and 1996 and their families. We estimate that the combined incidence of ALD and its variants in Australasia is at least 1.6 per 100,000. Of 95 affected males, 51 had cerebral adrenoleukodystrophy, 24 had adrenomyeloneuropathy, 15 had Addison's disease only, and 5 remained asymptomatic when last examined. However, the distribution of phenotypes among newly diagnosed patients has changed substantially over the last 15 years, with cerebral forms of the disease forming a decreasing proportion of new diagnoses. The measurement of plasma very long chain fatty acids (VLCFAs) alone detects 93% of women who can be proven to be carriers.

 

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