Leukapheresis Procedures to Obtain Plasma and Lymphocytes for Research Studies on Primary and Chronic HIV-Infected Patients
Purpose
There is evidence that early and aggressive treatment with antiretroviral drugs can prevent the loss of immune cell function that accompanies HIV infection. This study will use leukapheresis (drawing blood, separating out the white cells and returning the blood to the patient) to obtain blood cells from HIV-infected patients in either the acute or chronic stage of infection who are being treated with early highly active antiretroviral therapy (HAART). Leukapheresis is necessary to obtain enough cells to delineate the response of B cells to CD4+ T cell help, the CD8 factors associated with suppression of viral replication and normalization of immune function, and natural killer function relative to HIV disease. Study participants will be adult (older than 18 years) HIV primary or acutely affected patients (those with a history of exposure to HIV but not yet showing chronic symptoms of HIV disease) and HIV chronically infected patients (those infected with HIV for longer than 12 months or showing other symptoms of HIV disease) who are not receiving HAART at the beginning of the study. The study seeks to enroll 30 primary and 30 chronic patients. Pregnant women will not be enrolled in the study; women who become pregnant will be dropped from the study. Leukapheresis will be performed on each patient before HAART therapy begins and then three times a year. Each session will take between 1 and 3 hours. This longitudinal study will enable researchers to examine the function of certain B cells, natural killer cells, and CD8+ T cells in people who do not have chronic HIV disease and in those who do have the disease and are treated with HAART.
Condition
- HIV
Eligibility
- Eligible Ages
- Between 18 Years and 120 Years
- Eligible Genders
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
Adult (18 years old or older) HIV-1-infected patient Adequate venous access for research blood collection. Positive HIV antibody immunoassay and a positive confirmatory HIV test (as defined by current CDC criteria). Tests may be done in our clinic or by an outside provider. For individuals with suspected early infection; the following additional criteria may be used: HIV RNA levels of >2,000 copies/ml with a negative result from an HIV antibody immunoassay. Willingness to be able to make follow up visits at least once in the next 4 months and prior to the initiation of antiretroviral therapy. Blood pressure < 180/100; pulse rate between 50-100 unless a lower pulse rate is considered normal for the volunteer. Adequate blood counts (hemoglobin greater than or equal to 9.0 g/dL, hematocrit greater than or equal to 28 percent, platelets greaterhan or equal to 50,000). Willingness to give informed consent including consent for the storage of blood samples and genetic testing. Antiretroviral naive, no antiretroviral use in the last six months, or previously enrolled 02-I-0202 subjects on whom there are samples stored in the repository. Subjects who become HIV-infected while taking antiretroviral therapy for pre-exposure prophylaxis (PrEP) will be eligible for enrollment as long as them meet diagnostic criteria for HIV positivity. Subjects who enroll under another LIR apheresis protocol within the past three months and complete the apheresis within 4 weeks of starting antiretroviral therapy will also be eligible for enrollment. Patients with limited (no more than 4 weeks before screening visit) recent use of antiretroviral therapy may be eligible for study participation if, the opinion of the investigator, the ART usage will not impact the scientific validity of the protocol.
Exclusion Criteria
Pregnant and/or breastfeeding women. Be currently abusing alcohol or other drugs that potentially could interfere with patient compliance or safety. Have a condition which in the opinion of the investigators would make the patient ineligible for the study.
Study Design
- Phase
- Study Type
- Observational
- Observational Model
- Cohort
- Time Perspective
- Prospective
Arm Groups
| Arm | Description | Assigned Intervention |
|---|---|---|
| HIV chronic infection | For example, an individual infected with HIV-1 for an indeterminate amount of time. | |
| HIV early infection | For example, a negative HIV antibody immunoassay within 6 months of a positive HIV antibody assay and confirmatory test (as defined by current CDC criteria). |
Recruiting Locations
Bethesda, Maryland 20892
For more information at the NIH Clinical Center contact Office of Patient Recruitment (OPR)
800-411-1222
ccopr@nih.gov
More Details
- NCT ID
- NCT00039689
- Status
- Recruiting
- Sponsor
- National Institute of Allergy and Infectious Diseases (NIAID)
Detailed Description
HIV infection is known to cause profound and irreversible dysfunction of both innate and adaptive arms of the immune system. However, there is mounting evidence that early and aggressive treatment with antiretroviral drugs can prevent loss of immune cell function. In an attempt to further delineate the effect of early antiretroviral therapy (ART) on maintenance of immune cell function, we wish to recruit drug-naive HIV-infected patients who are either in early or chronic stage of infection. The study will require that patients undergo leukapheresis or research blood draw once before and several times after enrollment. Leukapheresis will be used in order to obtain sufficient cells to pursue the following objectives: delineating B cell response to CD4+T cell help, delineating the effect of ART on persistent HIV reservoirs in CD4+T cells of infected individuals, and delineating CD8+T cell-mediated suppression of viral replication and normalization of immune function, and characterizing natural killer (NK) function relative to HIV disease. The required number of mononuclear cells needed to perform these experiments can be easily and safely obtained using leukapheresis procedures in the Clinical Center Apheresis Unit. This protocol is specifically designed to conform to the requirements of the Apheresis Unit for donors to have leukapheresis procedures, but the protocol, by itself, is not an independent research study. Alternatively, whole blood draws may be used in cases where patients are unable to undergo leukapheresis. While this approach will limit extensive functional analyses, informative phenotypic and limited functional analyses can nonetheless be performed.