Case ReportDefective Beta and Alpha Cell Regulation in Patients With Hyperinsulinemia and Acanthosis Nigricans
作者:
DARA SCHUSTER,
THOMAS O'DORISIO,
KWAME OSEI,
期刊:
The American Journal of the Medical Sciences
(OVID Available online 1994)
卷期:
Volume 307,
issue 5
页码: 342-345
ISSN:0002-9629
年代: 1994
出版商: OVID
关键词: Glucose;Pancreatic hormones;Insulin resistance;Acanthosis nigricans
数据来源: OVID
摘要:
Beta cell hypersecretion is associated with the syndrome of hyperandrogenism, insulin resistance, and acanthosis nigricans. It is unknown whether concomitant alpha cell secretory dysfunction occurs in patients with this syndrome. The authors evaluated the gastroenteropancreatic hormones in four family members with varying degrees of the hyperandrogenism, insulin resistance, and acanthosis nigricans syndrome. Gastroenteropancreatic hormones were measured during oral glucose tolerance test with and without subcutaneous octreotide injection. The study revealed that the administration of subcutaneous octreotide resulted in suppression of beta cell function (insulin and c-peptide) but had no effect or a delayed effect on alpha cell secretion (glucagon). Furthermore, the severity of glucagon abnormalities paralleled that of beta cell hypersecretion and the clinical and phenotypic manifestations of acanthosis nigricans in our four patients. We speculate that this alpha cell aberration could potentially be involved in the altered glucose homeostasis and perhaps the skin manifestations of this syndrome. Therefore, glucagon levels should be evaluated in the hormonal studies in patients with hyperandrogenism, insulin resistance, and acanthosis nigricans syndrome.
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