Document 0345 DOCN M94A0345 TI Transitory expansion of a CD3+TcR gamma/delta+CD16+ lymphocytic population in two patients with advanced human immunodeficiency virus infection and high levels of natural killer activity. DT 9412 AU Tambussi G; Albarello V; Gori A; Bisson C; Lazzarin A; Department of Infectious Diseases, San Raffaele Hospital, Milan,; Italy. SO AIDS Res Hum Retroviruses. 1994 Jun;10(6):711-5. Unique Identifier : AIDSLINE MED/94355116 AB In the present study, we describe an expansion of CD16+ cells with a CD3+ TcR gamma/delta+ phenotype, in the presence of normal numbers of classic CD3-CD16+ natural killer (NK) cells, in two patients with human immunodeficiency virus (HIV) infection in late stage. The NK activity of the two subjects was substantially higher then that of HIV+ subjects in the same stage of infection. A second evaluation of one of the patients showed levels of NK activity consistent with the clinical stage of HIV infection, concomitant with a remarkable reduction in the percentage of double-positive CD3/TcR gamma/delta cells. The number of CD16+ cells also reached values comparable to those of the control group. In conclusion, we have identified a population of CD3+TcR gamma/delta+CD16+ cells that have the capability to lyse an NK-sensitive target in two patients with unusually high levels of NK activity. DE Acquired Immunodeficiency Syndrome/*BLOOD/IMMUNOLOGY Adult Antigens, CD3/*ANALYSIS Case Report Human Immunophenotyping *Killer Cells, Natural/PHYSIOLOGY *Lymphocyte Subsets Male Receptors, IgG/*ANALYSIS JOURNAL ARTICLE SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).