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Use of a Test That Evaluates How the Body Handles Insulin and Glucose

This study has been completed.
Information provided by:
National Institute of Allergy and Infectious Diseases (NIAID) Identifier:
First received: November 20, 2001
Last updated: August 6, 2008
Last verified: February 2004

The purpose of this study is to find out if testosterone gel affects how the body handles insulin and glucose.

Specific anti-HIV treatments may increase a patient's risk of certain diseases by causing metabolic problems such as reduced sensitivity to insulin. This substudy will examine how testosterone affects insulin sensitivity. If testosterone increases insulin sensitivity in the patients, then giving testosterone to HIV-infected patients may allow the continuation of anti-HIV treatments without increasing the patients' risk of disease. The test used to determine insulin sensitivity will be a modified frequently sampled intravenous glucose tolerance test (FSIVGTT), which can accurately measure insulin sensitivity.

HIV Infections

Study Type: Observational
Official Title: AACTG Modified Frequently Sampled Intravenous Glucose Tolerance Test (FSIVGTT) for the Assessment of Insulin Sensitivity: A Substudy of A5079

Resource links provided by NLM:

Further study details as provided by National Institute of Allergy and Infectious Diseases (NIAID):

Estimated Enrollment: 50
Detailed Description:

Assessment of insulin sensitivity is an important objective of this substudy. Extrapolation from earlier studies suggests that insulin resistance will be associated with low testosterone levels at baseline in HIV-infected men with visceral obesity and that physiologic testosterone replacement in these individuals is likely to increase insulin sensitivity. However, direct assessment of insulin sensitivity under carefully controlled conditions is crucial to understanding the full metabolic impact of physiologic testosterone replacement in the context of A5079. The FSIVGTT, using the Bergman minimal model, has become a widely used method for the assessment of insulin sensitivity in epidemiological and intervention studies. Based on these considerations, the modified FSIVGTT was chosen as the optimal modality to assess insulin sensitivity in A5112s.

This study is a substudy of A5079. Patients enrolled in A5079 are eligible for this substudy but receive no study treatment other than that which they receive on A5079. Insulin sensitivity is measured by FSIVGTT performed at entry and at Weeks 24 and 48. In the modified FSIVGTT, 15 serial blood specimens for glucose are drawn over a 245-minute interval. The FSIVGTT assesses whether patients given testosterone supplements have more sensitivity to insulin than patients given a placebo.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No

Inclusion Criteria

Patients may be eligible for this study if they:

  • Are enrolled in A5079.
  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 identifier: NCT00027092

United States, California
Univ of Southern California / LA County USC Med Ctr
Los Angeles, California, United States, 900331079
Univ of California San Francisco
San Francisco, California, United States, 94110
United States, Hawaii
Univ of Hawaii
Honolulu, Hawaii, United States, 96816
United States, Illinois
Rush Presbyterian - Saint Luke's Med Ctr
Chicago, Illinois, United States, 60612
United States, Indiana
Indiana Univ Hosp
Indianapolis, Indiana, United States, 462025250
Methodist Hosp of Indiana / Life Care Clinic
Indianapolis, Indiana, United States, 46202
Wishard Hosp
Indianapolis, Indiana, United States, 46202
United States, New York
Bellevue Hosp / New York Univ Med Ctr
New York, New York, United States, 10016
Sponsors and Collaborators
National Institute of Allergy and Infectious Diseases (NIAID)
Study Chair: Shalender Bhasin
  More Information Identifier: NCT00027092     History of Changes
Other Study ID Numbers: ACTG A5112s
AACTG A5112s
Study First Received: November 20, 2001
Last Updated: August 6, 2008

Keywords provided by National Institute of Allergy and Infectious Diseases (NIAID):
Infusions, Intravenous
Insulin Resistance
Hormone Replacement Therapy
Glucose Tolerance Test

Additional relevant MeSH terms:
HIV Infections
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Immunologic Deficiency Syndromes
Immune System Diseases
Hypoglycemic Agents
Physiological Effects of Drugs processed this record on September 19, 2017