Trial record 20 of 32 for:    " February 02, 2007":" March 02, 2007"[FIRST-RECEIVED-DATE]AND HIV[CONDITION]

Relationship of Viral Resistance Development to CD4 Monitoring Alone or With Viral Load Monitoring

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00434070
First received: February 9, 2007
Last updated: February 19, 2014
Last verified: February 2013
  Purpose

This study will examine whether HIV-infected patients are more likely to develop resistance to antiretroviral therapy if their blood is not monitored for the number of viruses (viral load) in the body.

A virus that changes (mutates) over time may become resistant to certain types of medicine. This resistance may affect future treatment options. This study will compare the amount of virus in the blood of HIV-infected patients who have been monitored for viral load with the amount of virus in the blood of patients who have not been monitored for viral load. For patients who have detectable virus, the type of resistance (mutations) of the virus will be determined by comparing the components of the virus with that of a virus that is known not to be resistant.

HIV-infected patients 18 years of age or older who are being treated at the Infectious Diseases Institute at Mulago Hospital at Makerere University in Kampala, Uganda, may be eligible for this study. Participants are interviewed about the treatments they have received for HIV and how they usually take their anti-HIV drugs. They also have a blood sample drawn for research tests.


Condition
Acquired Immunodeficiency Syndrome
Resistance

Study Type: Observational
Study Design: Time Perspective: Prospective
Official Title: Comparison of the Development of Thymidine Analogue Mutations With CD4 Monitoring Alone Versus CD4 Monitoring Plus Viral Load Monitoring in Naive HIV-1 Individuals on First-Line Antiretroviral Therapy in Africa

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Estimated Enrollment: 1500
Study Start Date: February 2007
Estimated Study Completion Date: February 2013
Detailed Description:

Antiretroviral therapy (ART) has become widely available in resource limited settings (RLS) due to large increases in available resources through the President s Emergency Plan for AIDS Relief (PEPFAR) and the Global Fund for AIDS, Tuberculosis, and Malaria (GFATM). The number of people accessing ART in RLS doubled in 2005 alone. Whereas viral load testing is done routinely for individuals on ART in the western hemisphere, this is not the case elsewhere. The World Health Organization (WHO) has recommended only clinical and CD4 count monitoring as the standard of care in RLS during the ART scale-up. As a result, there is a growing population of individuals in Africa currently on ART whose treatment is monitored only using clinical evaluations and CD4 counts.

In addition to preserving lives and improving the quality of life of HIV infected individuals, the goal of ART is to achieve and maintain suppression of HIV replication to an undetectable level. This goal enables the treatment to remain effective in the long term since the emergence of resistant strains is limited by the low replication rate of HIV achieved under these conditions. The recovery of the immune system as determined through CD4 count monitoring is neither a very sensitive nor specific marker of virological suppression in individuals on ART. Therefore, monitoring the response to ART using just the WHO guidelines for RLS may lead to a significant delay in detecting the failure to achieve or maintain virological suppression among individuals who are failing treatment. This is in contrast to western settings where routine viral load testing leads to early detection of failure to achieve suppression.

Failure to monitor and detect unsuppressed virus increases the risk of development of resistance to ART. In particular, failure to achieve or maintain virologic suppression for prolonged periods of time may lead to the sequential development of thymidine analogue mutations (TAMs) in patients taking zidovudine (AZT) or stavudine (d4T) as part of ART regimens. The accumulation of 3 or 4 TAMs confers drug resistance across the nucleoside reverse transcriptase inhibitors (NRTI) class of antiretroviral (ARV) drugs and has implications for future ART regimens, particularly in RLS where second line ART options are limited. Stavudine and zidovudine are currently used as part of the first line regimens in Sub-Saharan Africa and other RLS areas.

We hypothesize that patients who are monitored with a combination of CD4 counts and viral load measurements routinely develop TAMs at a slower rate than do patients who are monitored with only CD4 count measurement (as per WHO guidelines in RLS). This hypothesis is based on the higher risk of delay in detection of unsuppressed virus in patients who are monitored by clinical and CD4 counts alone, which may translate into the development of drug-resistant mutations.

The study team therefore proposes to carry out a cross-sectional study in a large public HIV out-patient clinic in which patients who are routinely monitored with both CD4 count and viral load measurements are compared with patients who are routinely monitored with CD4 counts measurement only. Individuals who have detectable viral load after 36 months of ARV therapy in each of the above patient categories shall undergo a structured interview and HIV genotypic testing, particularly to look for TAMs. The presence of TAMs in each instance shall be documented.

The results of this study will highlight the magnitude of the risk of using CD4 count monitoring only in patients on ART in RLS and contribute to efforts to find cheaper technologies for virological monitoring of these individuals. The findings will also support the choice of second line drug regimens that may be proposed for use in Africa.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

    1. Willing to provide individual informed consent.
    2. HIV positive. (HIV status will have been confirmed by recognized external testing centre (e.g., AIC) or if necessary by the IDI lab using Abbott Determine HIV1-2 plus STAT-PAK (Chembio Diagnostic Systems) rapid tests. Unigold (Trinity Biotech) is available for tie-breaker testing if necessary.
    3. Currently being followed at the Adult Infectious Disease Clinic.
    4. Patients who are aged 18 years or more.
    5. Patients who initiated ART therapy at the Adult Infectious Disease Clinic (First line ART regimens include either stavudine or zidovudine).
    6. Patients who were ART naive at ART initiation (from patient medical record).
    7. Patients who have been on ART for at least 36 months and no greater than 40 months.

EXCLUSION CRITERIA:

  1. Inability or unwillingness to provide individual informed consent.
  2. Patients currently admitted to Urgent Care facility (severely ill).
  3. Age less than 18 years.
  4. Presence of a documented infection within a period of 4 weeks from screening for enrollment.
  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 ClinicalTrials.gov identifier: NCT00434070

Locations
Uganda
Infectious Diseases Institute
Kampala, Uganda
Sponsors and Collaborators
Investigators
Principal Investigator: Steven J Reynolds, M.D. National Institute of Allergy and Infectious Diseases (NIAID)
  More Information

Publications:
ClinicalTrials.gov Identifier: NCT00434070     History of Changes
Other Study ID Numbers: 999907093, 07-I-N093
Study First Received: February 9, 2007
Last Updated: February 19, 2014
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
HIV
Antiretrovial Therapy
Resistance
Monitoring
TAMS
Treatment Experienced

Additional relevant MeSH terms:
Acquired Immunodeficiency Syndrome
HIV Infections
Immunologic Deficiency Syndromes
Lentivirus Infections
Retroviridae Infections
RNA Virus Infections
Virus Diseases
Sexually Transmitted Diseases, Viral
Sexually Transmitted Diseases
Slow Virus Diseases
Immune System Diseases

ClinicalTrials.gov processed this record on July 20, 2014