Document 0919 DOCN M95A0919 TI Flow cytometric three-color determination of CD4 T-lymphocytes on blood specimens from AIDS patients who have a large number of contaminating non-lymphocytes. DT 9510 AU Pattanapanyasat K; Pengruangrojanachai V; Thepthai C; Suwanagool S; Wasi C; Thalassemia Center, Faculty of Medicine Siriraj Hospital, Mahidol; University, Bangkok, Thailand. SO Asian Pac J Allergy Immunol. 1994 Dec;12(2):105-9. Unique Identifier : AIDSLINE MED/95336545 AB A three-color flow cytometric determination of CD4 T-lymphocytes on whole blood specimens from AIDS patients which contain a high proportion of non-lymphocyte elements is described. Peripheral blood cells were stained by a three-color method using monoclonal antibodies conjugated respectively with fluorescein isothiocyanate (FITC)-CD3, phycoerythrin (PE)-CD4 and peridinin chlorophyll protein (PerCP)-CD45. CD45 stains all leukocytes with the highest fluorescence expression of CD45 antigen in lymphocytes. By combining light scatter with CD45 in the fluorescence 3 (FL3) channel, a light scattering window can be drawn to include almost all bright CD45 lymphocytes. This live gate of lymphocytes was then acquired and analysed simultaneously using other irrelevant two-color (FITC/PE) antibodies of CD3 and CD4 in the FITC and PE channels, respectively. This method is easy and straightforward, and gives successful analysis of CD4 T-lymphocytes in AIDS blood specimens contaminated with an unusually large number of non-lymphocytic cells. DE Acquired Immunodeficiency Syndrome/*BLOOD/IMMUNOLOGY Antibodies, Monoclonal Antigens, CD3/ANALYSIS Antigens, CD4/ANALYSIS Antigens, CD45/ANALYSIS CD4 Lymphocyte Count/METHODS CD4-Positive T-Lymphocytes/*IMMUNOLOGY Flow Cytometry/*METHODS Fluorescent Dyes Human HIV Seropositivity/*BLOOD/IMMUNOLOGY Immunophenotyping Male Support, Non-U.S. Gov't Support, U.S. Gov't, P.H.S. JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).