BACKGROUND
The exercise capacity of patients with muscle phosphofructokinase deficiency is low and fluctuates from day to day. The basis of this variable exercise tolerance is unknown, but our patients with this disorder report that fatigue of active muscles is more rapid after a high-carbohydrate
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
Muscle phosphofructokinase deficiency (PFKD) is characterized by exercise intolerance due to the enzymatic block in muscle glycolysis. Glucose infusion increases exertional fatigue in these patients, probably by decreasing the availability of free fatty acids (FFA) and ketones, which play a crucial
BACKGROUND
Muscle phosphofructokinase deficiency, the seventh member of the glycogen storage diseases family, is also called Tarui's disease (GSD VII).
METHODS
We studied two patients in two unrelated families with Tarui's disease, analyzing clinical features, CK level, EMG, muscle biopsy findings
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