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C-peptide and insulin ratio in patients with juvenile pituitary dysfunction in different symptomatology


, : C-peptide and insulin ratio in patients with juvenile pituitary dysfunction in different symptomatology. Problemy Endokrinologii 38(2): 17-20

Altogether 24 adolescents with pubertal juvenile dyspituitarism (PJD) were investigated in the course of an oral GTT for 3 hours. The patients were divided into 3 groups: (1) with liver dysfunction and normal BP; (2) with normal liver and arterial hypertension; (3) with normal BP and normal liver function. The levels of glycemia, immunoreactive insulin, C-peptide and a molar C-peptide/insulin ratio were measured. All the examinees were characterized by basal and stimulated hyperinsulinemia against a background of a normal C-peptide value, the absence of a tendency to IRI reduction by the end of the GTT. A decrease in the C-peptide/IRI ratio was marked in the 1st group. One of the reasons of hyperinsulinemia in PJD in parallel with high insulin secretory pancreatic function can be a decrease in the metabolic clearance of liver insulin, especially noticeable in patients with hepatocyte dysfunction.

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