Ignite Creation Date:
2024-05-05 @ 5:20 PM
Last Modification Date:
2024-10-26 @ 9:30 AM
Study NCT ID:
NCT00434070
Status:
COMPLETED
Last Update Posted:
2019-12-12
First Post:
2007-02-09
Brief Title:
Relationship of Viral Resistance Development to CD4 Monitoring Alone or With Viral Load Monitoring
Sponsor:
National Institute of Allergy and Infectious Diseases NIAID
Organization:
National Institutes of Health Clinical Center CC
Study Overview
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
Status:
COMPLETED
Status Verified Date:
2013-02-07
Last Known Status:
None
Delayed Posting:
No
If Stopped, Why?:
Not Stopped
Has Expanded Access:
False
If Expanded Access, NCT#:
N/A
Has Expanded Access, NCT# Status:
N/A
Acronym:
None
Brief Summary:
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
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
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
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
Study Oversight
Has Oversight DMC:
None
Is a FDA Regulated Drug?:
None
Is a FDA Regulated Device?:
None
Is an Unapproved Device?:
None
Is a PPSD?:
None
Is a US Export?:
None
Is an FDA AA801 Violation?:
None
Secondary IDs
| Secondary ID | Type | Domain | Link |
|---|---|---|---|
| 07-I-N093 | None | None | None |