Analysis of HIV Genetic Variation in Patients Before Beginning Highly Active Antiretroviral Therapy

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00009256
Recruitment Status : Completed
First Posted : January 26, 2001
Last Update Posted : July 2, 2017
Information provided by:
National Institutes of Health Clinical Center (CC)

Brief Summary:

The purpose of this study is to gain knowledge about why drug therapy sometimes stops working in people infected with the human immunodeficiency virus (HIV). This occurs in 30 to 40% of patients treated with powerful antiretroviral drugs. The study will examine how the virus becomes resistant to drug treatment through mutations (changes) and how different mutations produce new variants that are resistant to more than one drug.

HIV-infected patients 18 years and older who have not been treated with antiretroviral medications and who have a relatively stable amount of virus in their blood (viral load) may be eligible for this study. Pregnant or breastfeeding women may not participate. Candidates will be screened with blood tests to determine viral load and to study the genetics of the virus.

Participants will be hospitalized at the NIH Clinical Center for 10 days for daily blood sampling. (In exceptional circumstances, the sampling may be done on an outpatient basis.) After discharge, patients will be followed by weekly visits for blood tests for a total of 120 days. When antiretroviral treatment begins, the patient may do one of the following:

  1. Continue on this study with antiretroviral treatment. Therapy will consist of D4T, 3TC, and efavirenz. Other drugs may be substituted for any of these that cannot be tolerated. HIV protease inhibitors will not be included in the regimen.
  2. Complete participation in this study and, if eligible, enroll in another NIH protocol (AVBIO).
  3. Begin standard antiretroviral therapy with a private physician.

Patients for whom treatment is not yet recommended or who choose not to be treated may continue to be monitored with blood tests for a total of 18 months. (Patients who leave the study after this time may re-join when they decide to start treatment.)

Participants may also undergo the following optional procedures to study the genetic variation of HIV: lymph node biopsy, spinal tap, and semen donation or female genital washing to collect secretion samples.

Sexual partners or needle-sharing partners of study patients are invited to enroll in this study to provide blood samples at the time the patient enrolls and at two intervals after any needle sharing or unsafe sex event they may report to NIH. Partners may also donate genital secretions or semen, and a lymph node or spinal fluid sample.

Information from this study may help in the development of new drug treatments that will be effective in controlling HIV infection when other treatments no longer work.

Condition or disease
HIV Infection

Detailed Description:

Infection with human immunodeficiency virus (HIV) results in progressive immune destruction and death. Current therapy for HIV (highly active antiretroviral therapy or HAART) infection utilizes combinations of drugs that, under optimum conditions, inhibit HIV replication, halt progressive immunodeficiency, and permit a measure of immunological reconstitution. In its present form, however, HAART is inadequate. HAART does not cure HIV infection, and has significant adverse side effects, which may require drug discontinuation. One of the most challenging limitations of HAART is the development of drug resistance, which may occur in 30-40% of treated patients. The precise mechanisms responsible for drug resistance remain uncertain, but explanations include the emergence of HIV variants encoding genetic mutations that confer resistance to antiretroviral drugs. Such drug resistant mutations may occur and be present at low frequencies prior to drug therapy. Understanding how these mutations arise and remain circulating in populations of HIV is uncertain.

The purpose of the present protocol is to derive a comprehensive description of HIV population genetics in a longitudinal, observational study of HIV-infected patients prior to initiating antiretroviral therapy. We plan to utilize frequent blood sampling and an extensive sequencing strategy to investigate parameters of HIV population genetics, including: a) genotypic and phenotypic analyses of HIV drug resistance mutations, b) determinations of the rates at which mutations arise, become fixed, lost, or undergo recombination, c) linkage analyses, d) estimates of the size of the effective virus population. We plan to apply this information to develop models of HIV evolution, predict the genetic behavior of HIV populations, including the emergence of resistant genomes. We expect that information regarding HIV population genetics may assist in designing appropriate drug regimens to salvage control of HIV virus replication after initial regimens have failed.

Study Type : Observational
Enrollment : 65 participants
Official Title: Analysis of HIV Genetic Variation in Patients Prior to Initiation of Highly Active Antiretroviral Therapy
Study Start Date : April 13, 2000
Study Completion Date : March 3, 2009

Resource links provided by the National Library of Medicine

MedlinePlus related topics: HIV/AIDS

Information from the National Library of Medicine

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, Learn About Clinical Studies.

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

HIV infection documented by ELISA/WB.

Viral load documented in our clinic as greater than or equal to 1000 copies RNA/ml plasma on one occasion.

At least 18 years of age.

For women of child-bearing potential, a negative serum pregnancy test is required within 14 days prior to enrollment.

Able to provide written informed consent.


Absence of HIV infection within 8 weeks prior to entry, documented as a negative HIV ELISA and WB within 8 weeks of screening positive ELISA and WB.

Use of immunosuppressants or cytotoxic agents, with the exception of corticosteroids.

Presence of active AIDS defining opportunistic infection or malignancy requiring cytotoxic chemotherapy. Malignancies which do not require systemic cytotoxic chemotherapy, such as low grade non-progressive KS, or skin cancer treated with excision are not exclusion criteria.

Prior antiretroviral therapy with nucleoside or non-nucleoside RT inhibitors or protease inhibitors defined as: any therapy in the last 5 years; any more than 4 days of protease inhibitors or NNRTIs ever taken; any more than 2 weeks of NRTIs ever taken.

Psychiatric illness that in the opinion of the PI might interfere with study compliance.

Active substance abuse or history of prior substance abuse that may interfere with protocol compliance or compromise patient safety.

Refusal to practice safer sex practices or use precautions to prevent pregnancy (effective barrier birth control or abstinence).

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00009256

United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Institute of Allergy and Infectious Diseases (NIAID)

Publications: Identifier: NCT00009256     History of Changes
Obsolete Identifiers: NCT00005114
Other Study ID Numbers: 000110
First Posted: January 26, 2001    Key Record Dates
Last Update Posted: July 2, 2017
Last Verified: March 3, 2009

Keywords provided by National Institutes of Health Clinical Center (CC):
Quasispecies Variation
Antiretroviral Therapy
Drug Naive Patients
Treatment Naive

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
Anti-Retroviral Agents
Antiviral Agents
Anti-Infective Agents