8 các kết quả
OBJECTIVE
To investigate the degree of genetic heterogeneity of myophosphorylase deficiency (McArdle disease) in Spain through molecular studies of 10 new patients.
METHODS
The coding sequence of the entire myophosphorylase gene was sequenced in DNA extracted from muscle and blood. Restriction
Pretreatment with glucagon relieved patients with McArdle disease from muscular symptoms during exercise and enhanced exercise performance, though it did not produce any improvement in patients with Tarui disease. The difference in glucagon effect between the two diseases was clearly demonstrated in
Genetic defects of myophosphorylase in humans cause a metabolic myopathy (McArdle's disease) characterized by exercise intolerance, cramps, and recurrent myoglobinuria. Recently, a breed of cattle with myophosphorylase deficiency has been identified: this is the first animal model of McArdle's
We identified a novel nonsense mutation in the myophoshorylase gene in a patient of Italian origin with McArdle disease. This homozygous C-to-T transition (805C > T) results in the replacement of a arginine at amino acid position 269 with a stop codon (R269X). Our data further expand the genetic
We identified two novel mutations in exon 2 of the myophosphorylase gene in a 33-year-old German women with McArdle disease. The patient was compound heterozygous for a novel nonsense mutation at codon 84 changing tyrosine to stop codon (Y84X) and for a novel missense mutation at codon 93 changing
METHODS
Myophosphorylase deficiency (McArdle's disease) is one of the most common causes of exercise intolerance, muscle cramps, and recurrent myoglobinuria. The myophosphorylase gene has been sequenced and assigned to chromosome 11, but the molecular basis of McArdle's disease is not known. We
We report two new mutations in the myophosphorylase gene (PYGM) in two unrelated Italian patients with myophosphorylase deficiency (McArdle's disease). In one, we identified a missense C-to-T mutation at codon 269 in exon 7, changing CGA (arginine) to TGA (stop codon) (R269X). The second patient
A common null polymorphism in the ACTN3 gene (rs1815739:C>T) results in replacement of an arginine (R) with a premature stop codon (X) at amino acid 577 in the fast muscle protein α-actinin-3. The ACTN3 p.Arg577Ter allele (aka p.R577* or R577X) has undergone positive selection, with an increase in