Document 3045 DOCN M94A3045 TI Natural killer (NK) cells in HIV disease. DT 9412 AU Whitelaw J; Brettle R; Scott G; Robertson R SO Int Conf AIDS. 1994 Aug 7-12;10(1):166 (abstract no. PB0091). Unique Identifier : AIDSLINE ICA10/94369530 AB OBJECTIVE: The aim of the study was to look at the concentration of Natural Killer (NK) cells in two risk groups infected with HIV 50 intra-venous drug users were analysed and 50 homo/bisexual men were the second cohort. METHOD: Blood was incubated with dual labelled monoclonal antibodies as follows- 1. lymphocyte gating MoAb CD45/14 2. isotype control and 3. T-cell and NK marker CD3/16 + 56 (Becton Dickinson) The red blood cells were lysed and the remaining cells analysed by flow cytometery--FACScan (Becton Dickinson). RESULTS: The average of the 50 IVDU (38 male:12 female) was 6.8% positive staining for CD16 + 45 in the lymphocyte 'gate'. In the sexually aquired cohort the mean was 15.7% of similar cells. DISCUSSION: NK cells are reported to exhibit minimal specificity and have no memory. Their cell lineage is not known. Also they are non-adherent and non-phogocytic. The above results show a marked difference in the two cohorts. Differing viral strains may be the agent? DE Antigens, CD45/BLOOD Bisexuality Cohort Studies Female Homosexuality Human HIV Infections/DIAGNOSIS/*IMMUNOLOGY/TRANSMISSION Killer Cells, Natural/*IMMUNOLOGY *Leukocyte Count Male Receptors, IgG/METABOLISM Risk Factors Sex Behavior Substance Abuse, Intravenous/COMPLICATIONS/IMMUNOLOGY MEETING ABSTRACT SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).