GePheRal: Clinical Validation of the Genotypic Diagnosis of Hiv-1 Resistance to Raltegravir by Parallel Analysis of the Genotype and Phenotype Profiles of Resistance

February 8, 2013 updated by: Elisabetta Carini, Università Vita-Salute San Raffaele
The purpose of this study is to correlate the different patterns of resistance mutations observed in vivo in patients failing RAL treatment with the fold-change resistance determined by the phenotypic assay.

Study Overview

Status

Status

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

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.

Detailed Description

The secondary objectives are, as follows:

  • to establish standardised genotypic assay for the HIV-1 pol gene region (region of interest, sensitivity, mutations involved as primary or compensatory changes, role of polymorphism present at baseline).
  • to reach consensus on the algorithm interpretation of in house ex-vivo genotypic evaluations.
  • to assess the genetic changes in RAL-failing patients under continuous drug pressure or drug discontinuation (dynamics of the reversion of resistance mutations).
  • to evaluate in RAL resistant HIV-1 variants the changes in replication capacity (RC) (baseline vs. following-timepoints).
  • to evaluate the immunological and virological trend associated with a raltegravir-regimen failure.

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.
Observational

Enrollment (Anticipated)

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.
100

Contacts and Locations

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

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Italy
      • Milan, Italy, 20127
        • Recruiting
        • Department of Infectious Diseases, IRCCS San Raffaele Hospital
        • Contact:
        • Contact:
        • Principal Investigator:
          • Antonella Castagna, MD
        • Principal Investigator:
          • Massimo Clementi, Prof.

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 and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

primary care clinic

Description

Inclusion Criteria:

  • Adult (at least 18 years of age) treatment-experienced, HIV-infected subjects of either sex and of any race, failing to a RAL-containing regimen will be enrolled in the study

Exclusion Criteria:

  • none

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

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
RAL Group
HIV-1 infected patients failing to a RALTEGRAVIR-containing regimen

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
Time Frame
- mean value of fold-change resistance determined by the phenotypic assay at baseline
Time Frame: baseline
baseline

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
Time Frame
changes of fold-change resistance determined by the phenotypic assay with respect to baseline.
Time Frame: 24 and 48 hours, W1, W2, W3 and W4 upon discontinuation
24 and 48 hours, W1, W2, W3 and W4 upon discontinuation
genetic changes under continuous drug pressure or drug discontinuation with respect to baseline(dynamics of the reversion of resistance mutations)
Time Frame: 24 and 48 hours, W1, W2, W3 and W4 upon discontinuation.
24 and 48 hours, W1, W2, W3 and W4 upon discontinuation.
changes of the replication capacity with respect to baseline
Time Frame: 24 and 48 hours, W1, W2, W3 and W4 upon discontinuation.
24 and 48 hours, W1, W2, W3 and W4 upon discontinuation.
changes of HIV-RNA with respect to baseline
Time Frame: 24 and 48 hours, W1, W2, W3 and W4 upon discontinuation
24 and 48 hours, W1, W2, W3 and W4 upon discontinuation
changes in CD4, CD4%, CD8, CD8% with respect to baseline
Time Frame: 24 and 48 hours, W1, W2, W3 and W4 upon discontinuation
24 and 48 hours, W1, W2, W3 and W4 upon discontinuation

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.
Università Vita-Salute San Raffaele

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.
IRCCS San Raffaele
Merck Sharp & Dohme LLC

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: Massimo Clementi, Prof., University Vita-Salute San Raffaele Laboratory of Microbiology and Virology
  • Study Director: Antonella Castagna, MD, Department of Infectious Diseases, IRCCS San Raffaele Hospital

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.
December 1, 2011

Primary Completion (Anticipated)

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.
March 1, 2013

Study Completion (Anticipated)

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.
September 1, 2013

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).
June 23, 2011

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.
June 24, 2011

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.
June 27, 2011

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.
February 11, 2013

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.
February 8, 2013

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.
February 1, 2013

More Information

Terms related to this study

Keywords

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.
  • Gepheral
  • Merck Sharp & Dohme Corp. (Other Identifier: Merck Sharp & Dohme Corp.)

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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