Acute Metabolic Effects of LAF 237 in Type 2 Diabetics
|ClinicalTrials.gov Identifier: NCT00230464|
Recruitment Status : Completed
First Posted : September 30, 2005
Last Update Posted : January 4, 2006
Incretin hormones (GIP and GLP-1) stimulate insulin release in a glucose dependant manner, hence are necessary for maintenance of normal glucose tolerance. Both GIP and GLP-1 are degraded and inactivated by DPP-4.
LAF 237 is an inhibitor of DPP-4 that has been shown to increase meal-stimulated levels of intact GLP-1 in animals and patients with T2DM..
The purpose of the current study is to explore the acute effects of LAF237 on the rate of appearance and disappearance of glucose in type 2 diabetics. Secondary objectives include the effect on FPG, insulin secretion rates, glucagon and FFA levels, and rate of glucose entry from the GI tract.
|Condition or disease||Intervention/treatment||Phase|
|Type 2 Diabetes Mellitus||Drug: LAF 237||Phase 3|
Study Design Double blind, placebo-controlled, randomized, two –period crossover study. Sixteen (16) both sexes diabetic patients will be enrolled and randomized to receive one of two treatment sequences (LAF-placebo or placebo-LAF).
At screening, patients will begin a weight maintaining diet containing 50% carbohydrates, 30% protein and 20% fat.
Within 7 days from screening patients will be scheduled for treatment 1. Patients will begin a 10-hour overnight fast on Day -1 at ~21h00. Patients will be admitted to GCRC next day. Fasting plasma glucose sample will be drawn and following this the patient will be served a standard breakfast containing 1/5 of their caloric allotment (50% carbohydrates, 30% protein and 20% fat). At noon patient will be fed a standard lunch containing 2/5 of their caloric allotment (50% carbohydrates, 30% protein and 20% fat). At 14h30 (-210) an infusion of 3-3H glucose will be started and continued until 08h00 next day (20 µCi x FPG/100 continuous, 0.20/min). At 17h30 (-30) patients will ingest 100 mg of LAF237 or placebo with 200 ml of water. At 18h00 (time zero) patients will be served a dinner (2/5 of their caloric allotment). The carbohydrates (glucose) in the meal will be labeled with 75 µCi of [1-14C]-glucose.
At -60, -50, -40, -35, -30, -20, -10, -5, and 0 minutes before dinner plasma samples for determination of glucose, insulin, C-peptide, glucagons, GLP-1, GIP, FFA, lactate, and amino acid concentrations and 3-3H glucose radioactivity will be drawn. Following dinner, further blood samples will be drawn every 15 minutes for 3.5 hours (18h00-21h30) and every 30 minutes for the next 10.5 hours (22h00-08h00 Day 2). Post dinner samples will be analyzed for the above parameter as well as for 14C glucose radioactivity. At 08h00 on Day 2, both catheters will be removed and the patients will be fed breakfast and then released from the site.
In addition to blood samples, urine from dinner time until 08h00 on Day 2 will be collected.
|Study Type :||Interventional (Clinical Trial)|
|Enrollment :||16 participants|
|Intervention Model:||Crossover Assignment|
|Official Title:||A Double-Blind, Placebo-Controlled, Randomized, Crossover Study to Explore the Acute Effects of LAF 237 on the Rate of Appearance and Disappearance of Glucose During the Overnight Post-Absorptive Period in Type 2 Diabetics|
|Study Start Date :||November 2004|
|Study Completion Date :||September 2005|
- Rate of appearance of endogenous glucose
- Rate of dissapearance of glucose
- Fasting glucose
- Insulin secretion
- Free fatty acids
- Rate of appearance of oral glucose
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00230464
|United States, Texas|
|Audie L Murphy VA Hospital|
|San Antonio, Texas, United States, 78229|
|Principal Investigator:||Ralph A DeFronzo, MD||University of Texas|