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Molecular-Genetic Screening of Major Mutations in the ARSA Gene in Patients with Metachromatic Leukodystrophy
Metachromatic leukodystrophy (MLD) is an inherited storage disease caused by deficiency of arylsulfatase A (ARSA). Molecular analysis of the major mutations in the ARSA gene was performed in 10 Ukrainian patients (from 9 families) with MLD. According to the age of onset, late infantile MLD was identified in 3 patients, juvenile MLD in 5 patients, and adult MLD in 2 patients (sibs), respectively. The ARSA activity in the patients was 2–26 nmol/h/mg protein (the normal activity has been established in our laboratory as 111.9 ± 7.1 nmol/h/mg protein). No correlation between enzyme activity and a clinical course of disease was revealed. The IVS2+1 mutation was found at 2 of 20 alleles (in a patient with late infantile form) and the P426L mutation was found at 2 of 20 alleles (in two patients with juvenile form). Thus, the total frequency of these two major mutations in the ARSA gene is 20 % in Ukrainian MLD patients.
Tsitologiya i Genetika 2002, vol. 36, no. 5, pp. 43-48
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