- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00332085
Pilot Trial of Chromium-Metformin Combination in Type 2 Diabetes
Pilot Trial of Chromium-Metformin Combination in Type 2 Diabetes: Impact on Blood Sugar Control and Insulin Resistance
Study Overview
Detailed Description
Chromium is widely marketed for use in diabetes and is used as a dietary supplement by approximately 10 million US consumers, second only to calcium supplementation. Limited scientific research has supported the potential of chromium to be beneficial in diabetes to improve blood sugar control and insulin sensitivity, yet many of these studies have design flaws and the relevance of the research in the US population has been questioned. Research on use of complementary & alternative medicine (CAM) suggests as many as 40% use CAM in combination with conventional medicine. Research performed at the Bastyr Center for Natural Health suggests 69% of patients get chromium as part of their treatment and 45% are on oral medications for blood sugar control. Metformin is the most commonly prescribed oral medication for diabetes in the world. The combination of chromium and metformin has never been studied in a clinical trial despite frequent use in combination. Additionally, research suggests chromium and metformin share at least one mechanism of action leading to questions about possible interactions - both favorable and unfavorable - resulting from the combination.
Type 2 diabetes remains the sixth leading cause of death in the US. Despite evolving technology and development of new medications, epidemiological data shows that only 37% of patients are in good glycemic control as defined by the American Diabetes Association. Recent large trials (UKPDS) suggest that any improvement in blood sugar control leads to favorable outcomes.
Human research suggests chromium improves insulin receptor sensitivity leading to blood sugar reduction. Research also shows blood levels of chromium are lower in people with type 2 diabetes and diabetic patients lose more chromium in their urine than people without diabetes.
This pilot trial will recruit type 2 diabetic subjects already on metformin and treat them with chromium picolinate for 8 weeks. The results of the trial will provide vital preliminary data including safety and size of effect to direct future, larger studies.
Study Type
Enrollment (Anticipated)
Phase
- Phase 1
Contacts and Locations
Study Locations
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Washington
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Kenmore, Washington, United States, 98036
- Bastyr University Campus SPR
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Seattle, Washington, United States
- Bastyr Center for Natural Health
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
ICD-9 Diagnosis of TYpe 2 Diabetes (250.XX) for two years or less and treated with metformin Patients having completed dose titration of metformin as prescribed by their physician and have reached a stble dose between 1000-2550 mg per day for at least two months HbA1c: 7.0-10.5%
Exclusion Criteria:
- Duration of metformin treatment longer than 1 year at start time of study medication Historical or current use of oral anti-diabetes (OAD) medication (other than metformin) or use of insulin History ofmyocardial infarction within the lat 6 months, unstable angina, uncontrollable hypertension with systolic greater than 180 or diastolic greater than 110.
Clinical or objective finding suggestive of congestive heart failure. Individuals not receiving routine management by their primary car eproviders and/or endocrinologists for their type 2 diabetes, including routine ECG and ophthamological evaluations.
Women of child-bearing age not using standard birth control measures. Hemoglobin <11 or > 16; Hematocrig <32 or > 50; WBC <3,000 or >12,000; Platelets <150,000 or >500,000 Serum Creatinine >1.4 mg/dL; BUN >25 mg/dL Presence of greater than +1 protein on random macroscopic urinalysis at screening without a rule out of microalbuminuria Total bilirubin >1.5 mg/dL LFTs: AST>60 IU/L; ALT>65/L; Alkaline phosphatase >120 Iu/L. Isolated LFT elevations with an ultrasound diagnosis of non-alcoholic Steatohepatitis and a lab rule out of viral hepatitis will be included in the study with careful monitoring of LFTs.
Subjects currently taking nutritional supplements, including multivatmin for study duration; subjects will be asked to discontinue any nutritional supplementation at the screening telephone interview 1 week prior to screening lab work and 4 week sprior to baseline lab work.
Subjects taking lipid lowering medications except statins (i.e. niacin, fibrates, resins) due to possible chromium binding.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Single Group Assignment
- Masking: Double
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
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Safety/Adverse Events
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Hemoglobin A1c
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Secondary Outcome Measures
Outcome Measure |
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Fasting Blood Glucose, Fasting Insulin, HOMA Index
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Lipid Profile: total cholesterol, LDL, HDL, Triglycerides
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Oral Glucose Tolerance Test
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Ryan Bradley, ND, Bastyr University
Study record dates
Study Major Dates
Study Start
Primary Completion
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Glucose Metabolism Disorders
- Metabolic Diseases
- Endocrine System Diseases
- Diabetes Mellitus
- Diabetes Mellitus, Type 2
- Physiological Effects of Drugs
- Molecular Mechanisms of Pharmacological Action
- Trace Elements
- Micronutrients
- Chelating Agents
- Sequestering Agents
- Iron Chelating Agents
- Chromium
- Picolinic acid
Other Study ID Numbers
- 190
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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