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Dipeptidyl Peptidase-4 Inhibition on Glucagon-like Peptide-1 (GLP-1)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified March 2010 by Johns Hopkins University.
Recruitment status was:  Active, not recruiting
Merck Sharp & Dohme Corp.
Information provided by:
Johns Hopkins University Identifier:
First received: July 24, 2009
Last updated: March 25, 2010
Last verified: March 2010
This research is being done to evaluate the effect of glucagon-like peptide-1 (GLP-1, a naturally occurring hormone) on insulin release and to examine whether there is extra insulin release when GLP-1 is not allowed to be rapidly inactivated.

Condition Intervention Phase
Glucose Homeostasis
Drug: Placebo
Drug: Januvia
Phase 2

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Double Blind (Participant, Investigator)
Primary Purpose: Health Services Research
Official Title: The Effect of Dipeptidyl Peptidase-4 Inhibition on GLP-1 Induced Insulin Secretion and Glucose Turnover During Mild Stable Hyperglycemia in Young and Old Normal Volunteers

Resource links provided by NLM:

Further study details as provided by Johns Hopkins University:

Primary Outcome Measures:
  • Insulin release and hepatic glucose production rate. [ Time Frame: One year ]

Secondary Outcome Measures:
  • Peripheral glucose utilization and glucagon release [ Time Frame: one year ]

Estimated Enrollment: 64
Study Start Date: March 2009
Estimated Study Completion Date: May 2011
Estimated Primary Completion Date: May 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Sugar pill Drug: Placebo
1 tablet 100 mg once a day
Other Name: Sugar pill
Active Comparator: Januvia Drug: Januvia
1 tablet 100 mg once a day
Other Name: Sitaglipton

Detailed Description:
The purpose of the present proposal is to 1) examine the role of DPP-4 inhibition on insulin release during a hyperglycemic clamp while GLP-1 is being infused and, 2) further elucidate the role of the metabolite of GLP-1, that is GLP-1 9-36 amide (GLP-1m). During stable and very reproducible elevated plasma glucose levels the effect of increased active incretin levels with DPP-4 inhibitors should result in increased plasma insulin levels. Therefore the aim of this protocol is to document whether plasma insulin levels are increased following GLP-1 infusion in the presence or absence of DPP-4 inhibitors. Additionally, we have shown that some improvement in glucose homeostasis during GLP-1 administration is due in part to the metabolite of GLP-1, i.e. GLP-1 (9-36) amide (GLP-1m). Therefore, we will also test the role of the latter by infusing GLP-1m when the volunteers are being treated with DPP-4 inhibitors.

Ages Eligible for Study:   21 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • Hct level of at least 34% for women and 36% for men
  • Women of non-bearing potential and women of childbearing potential using adequate contraception
  • Serum creatine level of less than 1.7 mg/dl
  • Four groups:

    • Age 21-45 (BMI between 18.50-24.99) & (BMI between 30-35)
    • Age greater than 65 years (BMI between 18.50-24.99) & (BMI between 30-35)

Exclusion Criteria:

  • Pregnant and/or lactating females
  • Women of childbearing potential not willing to use adequate contraception
  • Hct below inclusion criteria
  • Serum creatine level greater than 1.8 mg/dl
  • Age less than 21 and age between 46-64
  • Diabetes mellitus
  • BMI less than 18 and BMI greater than 35
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Please refer to this study by its identifier: NCT00947011

United States, Maryland
Johns Hopkins Bayview Medical Center
Baltimore, Maryland, United States, 21224
Sponsors and Collaborators
Johns Hopkins University
Merck Sharp & Dohme Corp.
Principal Investigator: Dariush Elahi, PhD Johns Hopkins University
  More Information

Responsible Party: Dariush Elahi, PhD, Johns Hopkins University School of Medicine Identifier: NCT00947011     History of Changes
Other Study ID Numbers: NA_00018441
Study First Received: July 24, 2009
Last Updated: March 25, 2010

Keywords provided by Johns Hopkins University:
Healthy volunteers

Additional relevant MeSH terms:
Sitagliptin Phosphate
Glucagon-Like Peptide 1
Hypoglycemic Agents
Physiological Effects of Drugs
Hormones, Hormone Substitutes, and Hormone Antagonists
Dipeptidyl-Peptidase IV Inhibitors
Protease Inhibitors
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action processed this record on April 26, 2017