Enhanced glucagon-like peptide-1 (GLP-1) response to oral glucose in glucose-intolerant HIV-infected patients on antiretroviral therapy

O Andersen, S B Haugaard, Jens Juul Holst, C F Deacon, J Iversen, U B Andersen, J O Nielsen, S Madsbad

4 Citations (Scopus)

Abstract

OBJECTIVES: We investigated whether the incretin hormones glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which are major regulators of glucose tolerance through the stimulation of insulin secretion, contribute to impaired glucose tolerance (IGT) among HIV-infected patients on highly active antiretroviral therapy (HAART).

METHODS: Eighteen HIV-infected male patients (six lipodystrophic and 12 nonlipodystrophic) with normal glucose tolerance (NGT) were compared with 10 HIV-infected male patients (eight lipodystrophic and two nonlipodystrophic) with IGT. Plasma concentrations of GLP-1 and GIP were determined frequently during a 3-h, 75-g glucose tolerance test. Insulin secretion rates (ISRs) were calculated by deconvolution of C-peptide concentrations.

RESULTS: The incremental area under the curve (incrAUC) for GLP-1 was increased by 250% in IGT patients compared with NGT patients (1455+/-422 vs. 409+/-254 pmol/L/180 min, respectively; P<0.05), whereas the incrAUC for GIP did not differ between the study groups (7689+/-1097 vs. 8041+/-998 pmol/L/180 min, respectively; not significant). In pooled study groups, the GIP incrAUC correlated positively with the ISR incrAUC without adjustment (r=0.38, P<0.05) and following adjustment for glucose incrAUC (r=0.49, P<0.01).

CONCLUSIONS: Our data suggest: (1) that glucose-intolerant, HIV-infected male patients may display enhanced GLP-1 responses to oral glucose compared with normal glucose-tolerant HIV-infected male patients, which may represent a compensatory mechanism rather than explain the IGT; (2) that the GIP response may be associated with ISR independently of plasma glucose in nondiabetic HIV-infected males on HAART.

Original languageEnglish
JournalHIV Medicine
Volume6
Issue number2
Pages (from-to)91-8
Number of pages8
ISSN1464-2662
DOIs
Publication statusPublished - Mar 2005

Keywords

  • Adult
  • Analysis of Variance
  • Antiretroviral Therapy, Highly Active
  • Antiviral Agents
  • Area Under Curve
  • Blood Glucose
  • Body Composition
  • C-Peptide
  • Gastric Inhibitory Polypeptide
  • Glucagon
  • Glucagon-Like Peptide 1
  • Glucose
  • Glucose Intolerance
  • Glucose Tolerance Test
  • HIV Infections
  • HIV-Associated Lipodystrophy Syndrome
  • Humans
  • Male
  • Peptide Fragments
  • Protein Precursors

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