A Pilot Study to Assess the Glucose Lowering Effect of Metformin and Sitagliptin in Adolescents With Type 1 Diabetes

This study is currently recruiting participants. (see Contacts and Locations)
Verified May 2012 by Baylor College of Medicine
Information provided by (Responsible Party):
Luisa M. Rodriguez, Baylor College of Medicine
ClinicalTrials.gov Identifier:
First received: October 29, 2012
Last updated: NA
Last verified: May 2012
History: No changes posted

The purpose of this study is to see if the use of metformin and sitagliptin used in conjunction with insulin can improve the blood sugars of teenagers with Type 1 diabetes.

Condition Intervention Phase
Type 1 Diabetes
Drug: Sitagliptin
Drug: Metformin
Drug: Sitagliptin + Metformin
Phase 4

Study Type: Interventional
Study Design: Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Pilot Study to Assess the Glucose Lowering Effect of Metformin and Sitagliptin in Adolescents With Type 1 Diabetes Mellitus

Resource links provided by NLM:

Further study details as provided by Baylor College of Medicine:

Primary Outcome Measures:
  • To determine the glucose lowering effect of metformin and sitagliptin alone and as combination therapy when used as adjuncts to insulin in adolescents with T1DM. [ Time Frame: 10 - 15 weeks ] [ Designated as safety issue: No ]

Estimated Enrollment: 48
Study Start Date: October 2012
Estimated Study Completion Date: December 2015
Estimated Primary Completion Date: December 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: Insulin plus sitagliptin Drug: Sitagliptin
up to 50 mg twice a day
Other Name: Januvia
Active Comparator: Insulin plus metformin Drug: Metformin
up to 1000 mg twice a day
Other Name: Glucophage
Active Comparator: Insulin plus sitagliptin and metformin Drug: Sitagliptin + Metformin
up to 50/1000 mg twice a day
Other Name: Sitagliptin + Metformin = Janumet

Detailed Description:
  • The study will include a total of 4 visits. The time period between the very first visit and the very last visit will be between 10 and 15 weeks. Each participant will be randomized to one of the 3 groups in the study. The groups are as follows:
  • Group 1: Insulin and sitagliptin
  • Group 2: Insulin and metformin
  • Group 3: Insulin and combination of sitagliptin and metformin
  • The study is a randomized open label design. All subjects will undergo a screening visit; if inclusion and exclusion criteria are fulfilled they will be enrolled in the study. At the time of enrollment the subject will continue their home insulin regimen and will be randomized to an add an oral hypoglycemic agent(s) : metformin, sitagliptin or combination therapy (metformin and sitagliptin). The total duration on study medication will be 6 weeks. All subjects will undergo a baseline mixed meal tolerance test (MMTT) in their standard or usual insulin Each subject will undergo a total of two studies. Blood draws will be necessary.

Ages Eligible for Study:   13 Years to 18 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Age of 13 to 18 years
  • HbA1c >7.5% but <10%
  • Subjects must be on intensive insulin management
  • Tanner stage greater than or equal to 4
  • Must have T1DM for at least one year , T1DM defined by ADA criteria and having at least one of the following antibodies: Anti-GAD, Anti-islet, Anti-insulin
  • C-peptide > 0.6 ng/ml

Exclusion Criteria:

  • Type 2 diabetes
  • History of any other chronic condition (except hypothyroidism stable on medications)
  • Actively taking medications that may affect glucose excursions (steroids or oral contraceptives)
  • Evidence of anemia, clinically significant elevation of the liver enzymes (3 X normal), amylase or lipase (2 X normal), abnormal triclycerides (3 X normal), abnormal renal function test
  • An unsupportive family environment and pregnant or lactating females
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01718093

Contact: Kathy Shippy, RN, CCRP 832-824-1268 klshippy@texaschildrens.org

United States, Texas
Baylor College of Medicine Recruiting
Houston, Texas, United States, 77030
Contact: Kathy Shippy, RN, CCRP    832-824-1268    klshippy@texaschildrens.org   
Principal Investigator: Luisa Rodriguez, MD, MS         
Sub-Investigator: Katherine Velez, MD         
Sub-Investigator: Bonnie Goldsmith, MD         
Sub-Investigator: Morey W. Haymond, MD         
Sub-Investigator: Maria J. Redondo, MD, PhD, MPH         
Sub-Investigator: Shannon French, MD         
Sponsors and Collaborators
Baylor College of Medicine
Principal Investigator: Luisa M. Rodriguez, MD, MS Baylor College of Medicine
  More Information

No publications provided

Responsible Party: Luisa M. Rodriguez, Assistant Professor - Department of Pediatrics - Endocrinology and Metabolism, Baylor College of Medicine
ClinicalTrials.gov Identifier: NCT01718093     History of Changes
Other Study ID Numbers: H-29924, DK096067
Study First Received: October 29, 2012
Last Updated: October 29, 2012
Health Authority: United States: Institutional Review Board

Keywords provided by Baylor College of Medicine:

Additional relevant MeSH terms:
Diabetes Mellitus, Type 1
Autoimmune Diseases
Diabetes Mellitus
Endocrine System Diseases
Glucose Metabolism Disorders
Immune System Diseases
Metabolic Diseases
Dipeptidyl-Peptidase IV Inhibitors
Enzyme Inhibitors
Hormones, Hormone Substitutes, and Hormone Antagonists
Hypoglycemic Agents
Molecular Mechanisms of Pharmacological Action
Pharmacologic Actions
Physiological Effects of Drugs
Protease Inhibitors

ClinicalTrials.gov processed this record on August 30, 2015