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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Muscle phosphofructokinase deficiency in two generations.

Phosphofructokinase ( PFK) is the key regulatory enzyme of glycolysis. Patients lacking the muscular isoform of PFK typically present with myopathy and compensated hemolysis (glycogenosis type VII or Tarui's disease). Since 1965 about 30 cases of muscular PFK deficiency have been reported. In most cases family history suggests a recessive inherited trait. We describe a family of Ashkenazi Jewish origin with two members in subsequent generations suffering from muscular PFK deficiency. The propositus, a 19-year-old male patient presented with weakness, myalgias and exercise intolerance since early infancy. His father also had early fatigue on exercise with myalgias; the mother and a 12-year-old brother were asymptomatic. Muscle biopsy of both the propositus and his father showed increased glycogen storage and absent histochemical stain for PFK. Biochemical studies of muscle revealed a markedly decreased PFK activity and DNA analysis of the muscle PFK gene revealed compound heterozygosity in both cases. This is the first description of proven muscle PFK deficiency (glycogenosis type VII) in two subsequent generations.[1]

References

  1. Muscle phosphofructokinase deficiency in two generations. Vorgerd, M., Karitzky, J., Ristow, M., Van Schaftingen, E., Tegenthoff, M., Jerusalem, F., Malin, J.P. J. Neurol. Sci. (1996) [Pubmed]
 
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