Abstract:
:Muscle glucose-6-phosphate dehydrogenase (G6PD) deficiency is described in four clinically heterogeneous patients: an athlete who developed myoglobinuria after physical exercise; a 7-year-old, mildly mentally retarded boy, who had episodes of dark urine and high creatine kinase; and two brothers of Sardinian origin, the elder showing moderate exercise intolerance. Histochemical and biochemical studies showed a lack of G6PD activity in muscle biopsy specimens as well as in erythrocytes. G6PD characterization in erythrocytes classified these mutant enzymes as Mediterranean variant in all the patients. The deficiency was confirmed in the patients' myotubes and skin fibroblasts, where residual activity was present. Electrophoretic studies in tissue culture extracts showed that the residual muscle enzyme migrated as a single electrophoretic band like normal human muscle G6PD.
journal_name
J Neuroljournal_title
Journal of neurologyauthors
Bresolin N,Bet L,Moggio M,Meola G,Fortunato F,Comi G,Adobbati L,Geremia L,Pittalis S,Scarlato Gdoi
10.1007/BF00314498subject
Has Abstractpub_date
1989-05-01 00:00:00pages
193-8issue
4eissn
0340-5354issn
1432-1459journal_volume
236pub_type
杂志文章abstract::Mutations in SCN2A cause epilepsy syndromes of variable severity including neonatal-infantile seizures. In one case, we previously described additional childhood-onset episodic ataxia. Here, we corroborate and detail the latter phenotype in three further cases. We describe the clinical characteristics, identify the ca...
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