Effect of intermittent-flow centrifugation leukapheresis on donor leukocyte counts.
R G Strauss, L C Maguire, J A Koepke...
https://pubmed.ncbi.nlm.nih.gov/6769278Actively Recruiting
Led by National Institute of Allergy and Infectious Diseases (NIAID) ยท Updated on 2026-05-22
3000
Participants Needed
3
Research Sites
N/A
Total Duration
Researchers are collecting various biological samples, such as blood, urine, body fluids, skin swabs, and skin biopsies, to support medical research conducted by the National Institute of Allergy and Infectious Diseases (NIAID) Vaccine Research Center. The samples help study infectious diseases like HIV and hepatitis, immune system responses, and the development of vaccines and monoclonal antibodies. The study includes children from 3 years old and adults, including healthy volunteers and those with infections or allergic or autoimmune conditions. Specimens are collected through standard blood draws (phlebotomy) or apheresis, which involves removing blood, separating desired components like plasma or white blood cells, and returning the rest to the participant. The apheresis procedure takes about 1 to 3 hours with the participant reclining. Samples may also include mucosal secretions, skin swabs, and biopsies. Collection can occur at clinic visits, outside labs, or at home, with shipments sent to the research center. Participants may donate samples once or repeatedly over a 1-year enrollment period, which can be extended. Participants undergo sample collection and provide basic medical and demographic information linked to their samples by ID number only. The study monitors safety during procedures and collects data on participant identity proof and consent. There are no specific study endpoints as samples support various research projects. Participation can last a year or more, with ongoing review by an ethics committee. The primary outcome measured is the successful collection of samples for research use.
CONDITIONS
Apheresis and Specimen Collection Procedures to Obtain Plasma, Peripheral Blood Mononuclear Cells (PBMCs) and Other Specimens for Research Studies
You may qualify if you...
You will not qualify if you...
Complete this quick 3-step screening to check your eligibility
Duration - 2 to 4 weeks
Participants are screened for eligibility to participate in the trial.
Duration - Indefinite, as often as permitted by institutional guidelines
Participants provide biological samples such as blood, plasma, PBMCs, mucosal secretions, skin swabs, skin biopsies, or body fluids for research studies. Samples may be collected at clinic visits, outside laboratories, healthcare providers, or at home and shipped to the research center.
Visits occur as needed for sample collection, which may vary by participant and sample type
Total: 3 locations
1
National Institutes of Health Clinical Center
Bethesda, Maryland, United States, 20892
Actively Recruiting
2
EvergreenHealth Medical Center
Kirkland, Washington, United States, 98034
Completed
3
University of Puerto Rico Medical Sciences Campus
San Juan, Puerto Rico, 00921
Active, Not Recruiting
O
OPS Team, VRC
Study Type
OBSERVATIONAL
Masking
N/A
Allocation
N/A
Model
N/A
Primary Purpose
N/A
Number of Arms
1
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