- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT00339833
The Effects of Anti-Inflammatory Treatment on Insulin Resistance in Healthy Volunteers
The Effect of Salsalate Treatment on Insulin Sensitivity and Insulin Secretion in Obese Non-Diabetic Individuals
This study, conducted at the Phoenix Indian Medical Center, Phoenix, Arizona, will determine whether reducing subclinical inflammation lessens insulin resistance in healthy, obese volunteers. The study findings may lead to new strategies for preventing type 2 diabetes. In diabetes, blood sugar is higher than normal and can result in serious medical problems, such as blindness and kidney failure. People with subclinical inflammation-inflammation that does not produce symptoms, such as fever, pain, or skin redness-are at increased risk for diabetes. Although the reasons for this are not completely understood, it is known that subclinical inflammation exacerbates insulin resistance, which is a cause of diabetes. Insulin is a hormone that helps control blood sugar, and when it does not work properly, the condition is known as insulin resistance.
Normal, healthy volunteers between 18 and 45 years old with a body mass index of at least 30 kg/m2 and who have subclinical inflammation (determined by blood tests) may be eligible for this study. Candidates must be non-smokers and must not have an alcohol or drug problem. Candidates will be screened with a medical history and physical examination, electrocardiogram, and blood and urine tests. Participants will maintain a standard diet and undergo tests and procedures during a 14-day inpatient stay at the Phoenix Indian Medical Center.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
In healthy subjects, low-grade inflammation, as measured by serum levels of cytokines or acute phase proteins, is positively associated with adiposity. Recent studies indicate that chronic low-grade inflammation in non-diabetic individuals may cause decline in insulin sensitivity and increases the risk of developing type 2 diabetes. It has been proposed that reduction of low-grade inflammation may reduce the risk of development of type 2 diabetes. In agreement with this hypothesis, the class of anti-inflammatory drugs called salicylates (such as aspirin) that influence a specific anti-inflammatory pathway have been found to decrease plasma glucose levels and increase insulin sensitivity in rodents as well as people with type 2 diabetes.
In the present study, we propose testing whether administration of the anti-inflammatory drug Salsalate improves insulin sensitivity in obese non-diabetic individuals and whether this improvement is related with a decrease in serum markers of inflammation. Subjects will be randomly assigned to two treatment groups: placebo or Salsalate (3g/d). An oral glucose tolerance test and a combined euglycemic/hyperglycemic clamp to assess insulin sensitivity and insulin secretion will be performed before and after seven days of treatment. Results of this study may help to identify novel strategies to prevent type 2 diabetes in high-risk groups.
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
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Arizona
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Phoenix, Arizona, United States, 85014
- NIDDK, Phoenix
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-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
- INCLUSION CRITERIA:
Age: Greater than 18 and less than 45 years.
Number: 44 completed studies (22 placebo, 22 Salsalate).
Sex: 22 Males and 22 Females.
BMI: Greater than or equal to 30 kg.m(2)
EXCLUSION CRITERIA:
- Age below 18 or above 45 years to minimize the risk of glucose clamp.
- Diabetes mellitus (as per 75 g OGTT, WHO 1999 criteria)
- Cardiovascular disease including: abnormal EKG, personal history of coronary heart disease;symptomatic angina pectoris or cardiac insufficiency as defined by NYHA; classification as functional class III or IV.
- Systolic blood pressure greater than 160mmHG and/or diastolic blood pressure greater than 100 mmHg and/or on antihypertensive therapy or resting heart rate greater than 90 bpm.
- Hematological disorder, including prolonged prothrombin time (normal range 10.9-12.9 sec) and partial thromboplastin time (24-36 sec) and thrombocytopenia (less than 150,000 mm(3)).
- Respiratory disease (including influenza, asthma)
- Allergies (including hay fever)
- Gastrointestinal (including peptic ulcer), hepatic or renal disease (ALT and AST greater than 3-fold above upper limit of normal range, creatinine greater than 1.3 mg/dl).
- Alcoholism, alcohol-induced autonomic neuropathy.
- Any endocrinological disorder, including hypopituitarism/pituitary dysfunctions or lesions, hypo/hyperthyroidism, insulinoma.
- CNS disease
- Psychosis or personal history of any psychiatric disorder.
- Taking medications within one month prior to beginning the study, including medications known to have pharmacological interactions with salicylates or that may affect insulin sensitivity and secretion (including salicylates, COX 1 and COX 2 inhibitors, warfarin, Beta-Blockers, phenothiazines, antidepressants, antiarrhythmic drugs, antimuscarinic drugs).
- Acute inflammation as assessed by history, physical and laboratory examination (subjects with C-reactive protein 2 standard deviations above the population mean will not be admitted). The population mean was calculated from subjects admitted at our research unit.
- Pregnant or lactating females or females on hormonal contraceptives.
- History of metabolic acidosis.
- Allergy to aspirin, other salicylates, or bleeding diathesis or currently on oral anticoagulants.
- Any current viral illness.
- Active cancer within 5 years prior to screening for the study.
- Positive urine drug screening test.
- Inability to provide informed consent.
- Smokers
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Placebo Comparator: Placebo
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Identical placebo for 7 days.
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Experimental: Salsalate
Salsalate (3g/day) for 7 days
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The intervention was salsalate (3g/day) for 7 days.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Change in Fasting Plasma Glucose Concentration
Time Frame: 7 days
|
7 days
|
Change in the Average Serum Insulin Concentration During the Last 40 Min of Clamp
Time Frame: last 40 min of clamp
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last 40 min of clamp
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Collaborators and Investigators
Investigators
- Principal Investigator: Bogardus Clifton, MD, National Institues of Diabetes and Digestive and Kidney Disease
Publications and helpful links
General Publications
- Vozarova B, Weyer C, Hanson K, Tataranni PA, Bogardus C, Pratley RE. Circulating interleukin-6 in relation to adiposity, insulin action, and insulin secretion. Obes Res. 2001 Jul;9(7):414-7. doi: 10.1038/oby.2001.54.
- Pratley RE, Wilson C, Bogardus C. Relation of the white blood cell count to obesity and insulin resistance: effect of race and gender. Obes Res. 1995 Nov;3(6):563-71. doi: 10.1002/j.1550-8528.1995.tb00191.x.
- Pickup JC, Crook MA. Is type II diabetes mellitus a disease of the innate immune system? Diabetologia. 1998 Oct;41(10):1241-8. doi: 10.1007/s001250051058.
- Koska J, Ortega E, Bunt JC, Gasser A, Impson J, Hanson RL, Forbes J, de Courten B, Krakoff J. The effect of salsalate on insulin action and glucose tolerance in obese non-diabetic patients: results of a randomised double-blind placebo-controlled study. Diabetologia. 2009 Mar;52(3):385-93. doi: 10.1007/s00125-008-1239-x. Epub 2008 Dec 23.
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
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
- Hyperinsulinism
- Diabetes Mellitus
- Insulin Resistance
- Physiological Effects of Drugs
- Peripheral Nervous System Agents
- Analgesics
- Sensory System Agents
- Anti-Inflammatory Agents, Non-Steroidal
- Analgesics, Non-Narcotic
- Anti-Inflammatory Agents
- Antirheumatic Agents
- Salicylsalicylic acid
Other Study ID Numbers
- 999903121
- 03-DK-N121 (Other Identifier: NIHCC)
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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