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Influence of Glucagon Inhibition in Relation to the Anti-Diabetic Effect of Glucagon-Like Peptide-1 (GLP-1) in Patients With Type 2 Diabetes Mellitus

NCT00655603 · Status: UNKNOWN · Phase: NA · Type: INTERVENTIONAL · Enrollment: 20

Last updated 2009-04-06

No results posted yet for this study

Summary

Incretinbased treatment of patients with type 2 diabetes mellitus (T2DM) has increasing interest. The incretin glucagon-like peptide-1 (GLP-1) stimulates beta-cells to increased secretion and production of insulin. Glucose sensitivity is enhanced, apoptosis inhibited - progression in disease is potentially stopped. The alpha-cell is also influenced by GLP-1 as infusion lowers plasmaglucose (PG) levels in patients with type 1 diabetes mellitus (T1DM) (C-peptide negative) by inhibition of glucagon and thereby decreased hepatic glucoseproduction (HGP). Further Vilsboll et al has proved normalization of the glacgonostatic effect of glucose in patients with T2DM. As an attempt to elucidate glucose-intolerance in patients with T2DM further Knop et al investigated the glucagonresponse to both oral glucose tolerance test (OGTT) and a following iso-glycemic clamp. He saw a sufficient suppression of glucagon when glucose was introduced intravenously but the suppression of glucagon was attenuated and delayed when glucose was given orally.

The aim of this study is to elucidate the glucose intolerance further. Due to the complex interactions and mutual feed-back regulation between the pancreatic hormones and the PG level this protocol includes five days. All days include a euglycemic-clamp, patients with T2DM (n=10) are clamped at their fasting PG as are healthy control subjects (n=10). During the clamp either GLP-1 alone; GLP-1 in combination with somatostatin, insulin and glucagon; or somatostatin, insulin and glucagon are infused and blood samples are drawn.

The design of the study makes it possible to isolate the effect of each hormone. Further the investigators will be able to enlighten the effect of GLP-1 on the increase in glucose turn-over it induces.

The essential part in this design will be hormone concentrations and the response parameter the amount of glucose (AUC) it takes to create the euglycemic-clamp.

Conditions

Interventions

OTHER

Infusion of native hormones from the pancreas and gut (GLP-1)

Glucose-clamps at fasting levels during infusion of hormones in different combinations.

Sponsors & Collaborators

  • University of Copenhagen

    collaborator OTHER

  • Hvidovre University Hospital

    collaborator OTHER

  • Glostrup University Hospital, Copenhagen

    collaborator OTHER

  • University Hospital, Gentofte, Copenhagen

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
SINGLE
Model
SINGLE_GROUP

Eligibility

Min Age
18 Years
Max Age
70 Years
Sex
ALL
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2008-03-31
Primary Completion
2009-05-31
Completion
2009-09-30

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT00655603 on ClinicalTrials.gov