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Reduced Activity of Glyceraldehyde 3‐Phosphate Dehydrogenase in Pancreas of Two Patients with Cystic Fibrosis

Post‐mortem studies of some enzymes connected to glucose metabolism were performed on pancreas, liver and adipose tissue from two patients with cystic fibrosis and from two age‐matched controls. The activity of glyceraldehyde 3‐phosphate dehydrogenase in the cystic fibrosis patients was markedly reduced in the pancreas, reduced to a lesser extent in the liver and increased in the adipose tissue. The activity of α‐glycerophosphate dehydrogenase was extremely high in cystic fibrosis pancreas, moderately higher in adipose tissue and considerably lower in the liver. Pyruvate kinase was decreased in CF pancreas and liver and increased in the adipose tissue. Glucose‐6‐phosphate dehydrogenase activity was detectable in cystic fibrosis pancreas, not detectable in the controls and lower in CF‐liver. All enzyme activities were compared with activities from organs of matched controls.