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Fifty grams of glucose were administered orally to twelve cirrhotics, twelve uremics and ten normal controls and the plasma insulin and C-peptide responses were measured and expressed as molar concentration. Glucose intolerance, hyperinsulinemia and elevated C-peptide levels were found in cirrhotics after glucose loading and in uremics during the later part of the glucose response. The molar ratio of C-peptide to insulin was lower in cirrhotics and higher in uremics than in controls. It is suggested that insulin is mainly degraded by the liver and C-peptide by the kidneys, and that C-peptide is not affected by the liver damage but is present in raised concentration in subjects with injured kidneys. Elevated C-peptide level in cirrhotics is consistent with hyperfunction of pancreatic B-cells.
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K Kawai, and
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K Kawai, and
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K Kawai, and
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