Preserved GLP-1 effects in a diabetic patient with Cushing's disease

Research output: Contribution to journalJournal articleResearchpeer-review

R A Ritzel, N Kleine, Jens Juul Holst, B Willms, W Schmiegel, M A Nauck

CONTEXT: A patient with diabetes mellitus, who participated in a study with intravenous administration of GLP-1, was later found to have Cushing's disease (markedly elevated 24 h urinary cortisol excretion and inadequate suppression of fasting cortisol with 2 mg dexamethasone). His diabetic state disappeared (2 h plasma glucose after 75 g oral glucose 159 mg/dl=IGT) after successful pituitary surgery (normal 24 h urinary cortisol excretion and adequate cortisol suppression with 2 mg dexamethasone).

OBJECTIVE: The present analysis was undertaken to compare GLP-1 actions on fasting glycemia in diabetes mellitus due to Cushing's disease with GLP-1 actions in typical type 2 diabetes.

DESIGN AND METHODS: GLP-1 (1.2 pmol/kg/min) and placebo had been infused into ten patients with diabetes mellitus over 4 h in the fasting state. The results from the patient with Cushing's disease (C) were compared to the data from the remaining nine patients with type 2 diabetes (D).

RESULTS: Within 4 h glucose decreased from basal (C: 12.9; D: 12.9+/-0.7 mmol/l) to normal fasting values (C: 5.0; D: 4.9+/-0.4 mmol/l). The stimulation of insulin secretion and suppression of glucagon secretion was similar in the patient with Cushing's disease compared to those with type 2 diabetes.

CONCLUSIONS: The insulinotropic, glucagonostatic and glucose-lowering actions of GLP-1 in a patient with diabetes mellitus due to cortisol excess were similar to actions in typical type 2 diabetes. Therefore incretin mimetics might be a novel therapeutic strategy for the treatment of glucocorticoid-induced diabetes mellitus.

Original languageEnglish
JournalExperimental and Clinical Endocrinology and Diabetes
Issue number2
Pages (from-to)146-50
Number of pages5
Publication statusPublished - Feb 2007

    Research areas

  • Blood Glucose, Diabetes Mellitus, Type 2, Female, Glucagon-Like Peptide 1, Humans, Hydrocortisone, Insulin, Male, Middle Aged, Pituitary ACTH Hypersecretion

ID: 132050370