title: Immunophenotyping in a multicenter study: the Transfusion Safety Study experience.
abstract: The Transfusion Safety Study (TSS) is a cooperative investigation of factors that determine the occurrence of and modify the expression of transfusion-transmitted infections. A major component of its data is derived from lymphocyte immunophenotyping using a large panel of monoclonal antibodies and two-color flow cytometric analysis. The multicenter longitudinal character of TSS necessitates a uniformity of instrumentation, reagents, and protocols, as well as an intensive quality control program. The baseline assessment of a cohort of males 10 years of age and over with congenital clotting disorders (CCD) exemplifies the approach and some of the flow cytometry results. A comparison of anti-HIV-1 positive and negative subjects shows that more of the loss of T4+ cells was attributable to a decrease in the T4+4B4+ subset than the T4+2H4+ subset. There was an overall increase in CD8 cells, with a significant increase in the I2+T8+ and Leu7+T8+ cells, but a fall in NKH.1+T8+ cells. Monocytes, MO2+I2+ cells, increased. In CCD patients under the age of 10, both anti-HIV-1 positive and negative, there were absolute elevations in immunocytes, including CD4. There was also a distinctly different distribution of CD4 subsets. The suppressor inducer subset, 2H4+T4+, was increased relative to the helper inducer subset, 4B4+T4+, in the younger subjects.
authors.affiliation: University of Miami School of Medicine, Florida 33101.
authors.forename: M A
authors.initials: MA
authors.lastname: Fletcher
authors.forename: S P
authors.initials: SP
authors.lastname: Azen
authors.forename: B
authors.initials: B
authors.lastname: Adelsberg
authors.forename: G
authors.initials: G
authors.lastname: Gjerset
authors.forename: J
authors.initials: J
authors.lastname: Hassett
authors.forename: J
authors.initials: J
authors.lastname: Kaplan
authors.forename: J C
authors.initials: JC
authors.lastname: Niland
authors.forename: T
authors.initials: T
authors.lastname: Odom-Maryon
authors.forename: J W
authors.initials: JW
authors.lastname: Parker
authors.forename: D P
authors.initials: DP
authors.lastname: Stites
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000097:blood* / Q000276:immunology / Q000635:transmission; D001778:Blood Coagulation Disorders / Q000097:blood* / Q000276:immunology; D002648:Child; D003140:Communicable Disease Control; D005434:Flow Cytometry; D015497:HIV-1; D006801:Humans; D008137:Longitudinal Studies; D008214:Lymphocytes / Q000145:classification*; D008297:Male; D015337:Multicenter Studies as Topic; D010641:Phenotype; D065227:Transfusion Reaction