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Treatment of Diabetes After Gastric Bypass With Sitagliptin (LAF33)

This study has been completed.
Merck Sharp & Dohme Corp.
Information provided by (Responsible Party):
Blandine Laferrere, Columbia University Identifier:
First received: January 13, 2012
Last updated: October 11, 2016
Last verified: October 2016
The purpose of this study is to assess whether Januvia (sitagliptin phosphate 100mg) is safe and effective for the treatment of Type 2 Diabetes in patients who have had Gastric Bypass.

Condition Intervention
Type 2 Diabetes Mellitus Drug: Sitagliptin phosphate Other: Placebo

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Randomized, Double-blind, Parallel-group, Placebo-controlled Study to Assess Efficacy, Safety and Tolerability of Sitagliptin Phosphate 100 mg as Treatment for Recurrent, Persistent or Newly Diagnosed Type 2 Diabetes After Gastric Bypass

Resource links provided by NLM:

Further study details as provided by Blandine Laferrere, Columbia University:

Primary Outcome Measures:
  • Change in Postprandial Glucose Levels in Patients with Type 2 Diabetes After Gastric Bypass Surgery [ Time Frame: Baseline and 6 weeks ]
    Sitagliptin 100 mg/d given for 6 weeks will lower postprandial glucose levels during a 200 kcal test meal compared to placebo in patients with type 2 diabetes after gastric bypass surgery.

Secondary Outcome Measures:
  • Change in Satiety in Patients with Type 2 Diabetes After Gastric Bypass Surgery [ Time Frame: Baseline and 6 weeks ]
    Sitagliptin 100 mg/d for 6 weeks will increase satiety more than placebo following a 200 kcal standard meal in patients with type 2 diabetes after gastric bypass surgery

  • Occurrence of Side Effects In Relation to Sitagliptin [ Time Frame: 6 weeks ]
    Sitagliptin 100 mg/d for 6 weeks will not be associated with serious side effect and /or more side effects than placebo.

Enrollment: 37
Study Start Date: July 2012
Study Completion Date: August 2016
Primary Completion Date: August 2016 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Sitagliptin phosphate
100 mg/day sitagliptin phosphate (Januvia) PO once a day for 4-5 weeks
Drug: Sitagliptin phosphate
100 mg/day orally
Other Name: Januvia
Placebo Comparator: Placebo
1 Placebo pill / day PO once a day for 4-5 weeks
Other: Placebo
1 Placebo Pill per day

Detailed Description:

Januvia (sitagliptin phosphate 100mg) is an FDA approved medication for the treatment of Type 2 Diabetes. Sitagliptin works by inhibiting the Dipeptidyl peptidase-4 enzyme, resulting in increased active glucagon-like peptide-1 (GLP-1) levels. GLP-1 is an incretin which increases post-prandial insulin secretion. Because Gastric Bypass has also been shown to increase GLP-1 levels, this study seeks to determine the additional effect of DDP-4 inhibition on glucose control in patients who have elevated incretin levels post Gastric Bypass. The study will also assess if Januvia (Sitagliptin phosphate) is safe and well tolerated in patients after Gastric Bypass.

Recruitment and data collection for this study was started at St. Luke's Hospital in New York, NY and later moved to Columbia University Medical Center in New York, NY.


Ages Eligible for Study:   18 Years to 70 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Must be a resident of the NYC metropolitan area or be able to come for emergency unscheduled and regular weekly meetings in Manhattan.
  • HbA1c ≥ 6.5% and ≤ 8.5 % or a fasting glucose ≥ 126 mg/dL or a random glucose ≥ 200 mg/dL at least 12 months after GBP surgery confirmed by central laboratory.
  • Subject is capable and willing to give informed consent.
  • Subject is otherwise in good general health, based on medical history and physical examination.
  • Subject is a non smoker for at least 6 months prior to study start
  • Female subjects of child bearing potential must use oral, injected or implanted hormonal methods of contraception from at least the commencement of their last normal period prior to the first administration of the challenge agent. Subjects using hormonal contraception should use a barrier method in addition from the first administration of challenge agent until their next normal period following the end of the study.

Exclusion Criteria:

  • History of type 1 diabetes
  • Female subject is pregnant or breastfeeding.
  • Recent (< 30 days) or simultaneous participation in another clinical trial.
  • Any situation that can compromise the study, including serious illness or a predictable lack of cooperation from the subject.
  Contacts and Locations
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Please refer to this study by its identifier: NCT01512797

United States, New York
New York Obesity Nutrition Research Center, Columbia University
New York, New York, United States, 10032
Sponsors and Collaborators
Blandine Laferrere
Merck Sharp & Dohme Corp.
Principal Investigator: Blandine Laferrere, MD New York Obesity Nutrition Research Center
  More Information

Additional Information:
Responsible Party: Blandine Laferrere, Associate Professor of Medicine, Columbia University, Columbia University Identifier: NCT01512797     History of Changes
Other Study ID Numbers: AAAO1107
0000048421 ( Other Grant/Funding Number: Merck & Co., Inc )
Study First Received: January 13, 2012
Last Updated: October 11, 2016
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Undecided

Keywords provided by Blandine Laferrere, Columbia University:

Additional relevant MeSH terms:
Diabetes Mellitus
Diabetes Mellitus, Type 2
Glucose Metabolism Disorders
Metabolic Diseases
Endocrine System Diseases
Sitagliptin Phosphate
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 September 25, 2017