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

Activities of aldose reductase, ATPases, and nucleotide concentrations of erythrocytes in patients with type 2 (non-insulin-dependent) diabetes mellitus.

Aldose reductase (EC 1.1.1.21) is implicated in the pathophysiology of diabetic complications. In this paper we determined the activities of aldose reductase and ATPases of the erythrocytes in 17 patients with Type 2 (non-insulin-dependent) diabetes mellitus (NIDDM). In the aldose reductase assay we used fluorometric method to avoid the disturbance of hemoglobin. With dihydronicotinamide adenine dinucleotide (NADH), we verified it was aldose reductase but not aldehyde reductase II that was activated in the erythrocytes of the patients with NIDDM. The aldose reductase activity of the erythrocytes in the patients was significantly higher (P less than 0.01) than that in the controls. The activity of Na+/K(+)-ATPase of the patients was significantly lower (P less than 0.01) than that of the controls. The activities of Ca(2+)-ATPase and Mg(2+)-ATPase on the erythrocyte membranes of the patients were similar to those of the controls. At the same time we measured the seven nucleotide concentrations in the erythrocytes of the patients. In this experiment we used ultrafiltration method, instead of acid precipitation to make it possible to determine dihydronicotinamide adenine dinucleotide phosphate (NADPH) and NADH. The concentrations of ATP, ADP and AMP were similar to those of the controls. The concentrations of NADPH, NAD+ and NADH in the erythrocytes of the patients were significantly lower (P less than 0.01, 0.05 and 0.05 respectively) than those of controls. The concentration of nicotinamide adenine dinucleotide phosphate (NADP+) in the patients was significantly higher (P less than 0.01) than that of controls.[1]

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