Metabolic Effects of Switching Kaletra to Boosted Reyataz

March 5, 2010 updated by: Massachusetts General Hospital
To study the effects of switching from Kaletra to Boosted Reyataz on glucose, lipids and fat in HIV-infected patients.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The primary objective of this study is to determine tissue specific glucose trafficking in patients before and after switching from a regimen containing Lopinavir/ritonavir (LPV/r) to one containing atazanavir/ritonavir (ATV/r). Secondary outcome measures of interest will include insulin sensitivity determined by clamp testing, and lipid metabolism and hepatic glucose production assessed using stable isotope techniques. We hypothesize that switching protease inhibitor (PI) to ATV/r from LPV/r will result in direct increases in glucose uptake in muscle and visceral adipose tissue in association with improvements in overall whole body insulin sensitivity compared to remaining on LPV/r. We will complete a prospective randomized trial of Human Immunodeficiency Virus (HIV) infected patients who have been on a stable antiretroviral (ARV) regimen containing LPV/r for at least 6 months and who will be randomized to either switch to a regimen containing ATV/r or remain on LPV/r for 6 months. Each subject will complete Positron Emission Tomography (PET) 18-fluorodeoxyglucose (FDG) imaging during a hyperinsulinemic clamp study at baseline and 6 months after randomization.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
15

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Massachusetts
      • Boston, Massachusetts, United States, 02114
        • Massachusetts General Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  1. Previously diagnosed HIV infection
  2. Age between 18-65 years
  3. Stable antiviral regimen containing at least 2 nucleoside reverse transcriptase inhibitors (NRTI's) and LPV/r for ³ 6 mos
  4. CD4 count > 400 cell/mm3
  5. Metabolic complication as indicated by one or more of hyperinsulinemia (fasting insulin >= 15 mIU/ml), hypercholesteremia (fasting total cholesterol >= 200 mg/dL), hypertriglyceridemia (fasting triglycerides >= 150 mg/dL), or treatment with a lipid lowering medication.

Exclusion Criteria:

  1. Hemoglobin < 11.0 g/dL
  2. History of Diabetes Mellitus
  3. Currently on medication for Diabetes
  4. Therapy with glucocorticoid, growth hormone or other anabolic agents currently or within the past 3 months
  5. Current substance abuse, including alcohol, cocaine and/or heroin
  6. Any contraindication to ATV/r or known allergy to ATV
  7. Concurrent therapy with: Bepridil; cisapride; ergot derivatives (dihydroergotamine, ergonovine, ergotamine, methylergonovine); indinavir; irinotecan; lovastatin; midazolam; pimozide; proton pump inhibitors (esomeprazole, lansoprazole, omeprazole); rifampin; simvastatin; St John's wort; or triazolam
  8. New or serious opportunistic infection in the past 3 months
  9. Pregnancy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: 1
Boosted Reyataz (300mg atazanavir + 100mg ritonavir)
Drug: atazanavir/ritonavir
atazanavir 300mg + ritonavir 100mg once daily
Other Names:
  • Boosted Reyataz
Active Comparator: 2
Kaletra (pre-study dose)
Drug: lopinavir/ritonavir
patient remains on their pre-study dose of lopinavir/ritonavir
Other Names:
  • Kaletra

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Glucose Trafficking
Time Frame: 6 months
6 month mean and standard deviation for glucose uptake into anterior thigh muscle as measured by FDG/PET scanning during euglycemic hyperinsulinemic clamp. During the hyperinsulinemic conditions of the clamp, glucose and 18-FDG [labeled glucose] are taken up by muscle. The quantity of 18-FDG taken up is measured by the PET scan. Although there are no well-accepted norms for this measurement, a higher value indicates that more glucose is being taken up by (or "trafficked to") muscle. Increased uptake of glucose indicates increased muscle insulin sensitivity.
6 months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Insulin Sensitivity
Time Frame: 6 months
6 month mean and standard deviation for insulin-stimulated glucose uptake (M) per unit insulin at 120 minutes as measured by euglycemic hyperinsulinemic clamp.
6 months
Fasting Glucose
Time Frame: 6 months
6 month mean and standard deviation for fasting glucose.
6 months
Lipid Metabolism - Serum Triglyceride
Time Frame: 6 months
6 month mean and standard deviation for serum triglyceride.
6 months
Body Composition - Visceral Adipose Tissue
Time Frame: 6 months
6 month mean and standard deviation for visceral adipose tissue (VAT) as measured by single slice computed tomography (CT) scan at the L4 pedicle (pedicle of 4th lumbar vertebra).
6 months
Immune Parameters -- CD4 Count
Time Frame: 6 months
6 month mean and standard deviation for CD4+ count.
6 months
Liver Enzymes -- Aspartate Aminotransferase (AST)
Time Frame: 6 months
6 month mean and standard deviation for AST.
6 months
Liver Enzymes -- Alanine Aminotransferase (ALT)
Time Frame: 6 months
6 month mean and standard deviation for ALT.
6 months
Total Bilirubin
Time Frame: 6 months
6 month mean and standard deviation for total bilirubin.
6 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Massachusetts General Hospital

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Bristol-Myers Squibb

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Steven K Grinspoon, MD, MGH

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
May 1, 2006

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2008

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2008

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 15, 2006

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 18, 2006

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 19, 2006

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 9, 2010

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 5, 2010

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2010

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 2005-P-002239

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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