Overview

This trial is active, not recruiting.

Conditions diabetes, obesity
Treatments intralipid 20%, saline
Sponsor The University of Texas Health Science Center at San Antonio
Collaborator National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Start date January 2008
End date December 2013
Trial size 12 participants
Trial identifier NCT01740817, 5R01DK080157, HSC20080015H

Summary

The purpose of this study is to determine whether a lipid infusion can up-regulate toll-like receptor 4 (TLR4) signaling in human subjects

United States No locations recruiting
Other Countries No locations recruiting

Study Design

Allocation randomized
Intervention model crossover assignment
Masking open label
Primary purpose basic science
Arm
(Active Comparator)
Lipid infusion
intralipid 20% Liposyn
30 ml/h for 48 h
(Placebo Comparator)
Saline infusion
saline
30 ml/h for 48 h

Primary Outcomes

Measure
Muscle insulin sensitivity
time frame: 48 hr after lipid/saline infusion

Secondary Outcomes

Measure
TLR4 signaling
time frame: 48 hr following lipid/saline infusion

Eligibility Criteria

Male or female participants from 18 years up to 60 years old.

Inclusion Criteria: 1. Subjects must have the following laboratory values: Hematocrit ≥ 35%, serum creatinine ≤ 1.5 mg/dl, aspartate aminotransferase (AST) < 2 X upper limit of normal, Alanine aminotransferase (ALT) < 2 X upper limit of normal, alkaline phosphatase < 2 X upper limit of normal, normal urinalysis [no glucose, trace protein, trace ketones, lipase < 50 IU/L, no bacteria, up to 1-3 white blood cells (WBC) and red blood cells (RBC) per hpf], and normal platelets, prothrombin time (PT) and partial thromboplastin time (PTT). 2. Female subjects must be non-lactating. Female patients are eligible only if they have a negative pregnancy test throughout the study period (or postmenopausal). Postmenopausal women taking hormone replacement will be included if they have been on a stable dose for ≥6 months. 3. Subjects whose body weight has been stable (within 2%) for at least three months. Exclusion Criteria: 1. Subjects with impaired glucose tolerance based on American Diabetes Association criteria. 2. Subjects taking drugs known to affect glucose and lipid homeostasis will be excluded. Statins will be permitted if the subject has been on a stable dose for at least three months. Subjects who have taken for more than a week non-steroidal anti inflammatory drugs (NSAIDS) within two months or systemic steroids, anabolic steroids, growth hormone or immunosuppressants within 12 months will be excluded. Subjects taking low-dose (81 mg/day or less) aspirin will be allowed. 3. Patients with a history of clinically significant heart disease (New York Heart Classification greater than grade II; more than non-specific ST-T wave changes on the EKG), peripheral vascular disease (history of claudication), or pulmonary disease (dyspnea on exertion of one flight or less; abnormal breath sounds on auscultation) will not be studied. 4. Recent systemic or pulmonary embolus, impaired renal function, poorly controlled blood pressure (systolic BP>170, diastolic BP>95), resting heart rate >100, electrolyte abnormalities, neuromuscular or musculoskeletal disease. 5. Subjects who smoke. 6. Subjects who engage in a regular exercise program (zero or one exercise sessions per week are allowed). 7. Any subject who has donated blood in the previous two months. 8. Any subject with a hematocrit of less than 35. 9. Subjects who are claustrophobic. 10. Women taking oral contraceptives. 11. alcohol consumption greater than 30 grams daily. 12. baseline plasma triglyceride levels over 200 mg/dl

Additional Information

Official title A Randomized, Crossover Study to Evaluate the Effect of Lipid Infusion on TLR4 Signaling and Insulin Resistance in Human Muscle
Principal investigator Nicolas Musi, MD
Description The investigators plan to examine the effect of a lipid infusion on TLR4 expression and insulin sensitivity. A group of 30 subjects aged 18-60 years old, lean (BMI < 26 kg/m2) normal glucose tolerant subjects without a family history of type 2 diabetes will receive a lipid or saline infusion. The subjects will be randomly assigned to first receive either a 48 hour long lipid or saline infusion. Approximately 4-6 weeks later subjects will return to undergo another study (if, in the first study they received lipid, on the second study they will receive saline, and vice versa). A near-equal number of women and men will be included in each group.
Trial information was received from ClinicalTrials.gov and was last updated in March 2015.
Information provided to ClinicalTrials.gov by The University of Texas Health Science Center at San Antonio.