title: T cell subsets and cytomegalovirus retinitis in human immunodeficiency virus-infected patients.
abstract: A case-control study was done to investigate the relationship between T cell subsets and cytomegalovirus (CMV) retinitis in human immunodeficiency virus (HIV)-infected subjects with or without CMV retinitis and CD4+ cell counts of <0.050 x 10(9)/L. Cell surface markers on peripheral blood lymphocytes were evaluated using flow cytometry. Patients with CMV retinitis had significantly lower levels of CD8+ cells (median: 0.152 x 10(9)/L) compared with levels for controls (median: 0.296 x 10(9)/L, P < .001). Significant down-regulation of costimulatory molecule CD28+ and lymphocyte function-associated antigen-1 (LFA-1) expression was observed in patients versus controls (CD28+: 0.048 x 10(9)/L vs. 0.143 x 10(9)/L, P < .001; LFA-1: 0.238 x 10(9)/L vs. 0.400 x 10(9)/L, P < .001), but no significant differences were noted for NK cells. We propose that progressive loss of the CD3+ CD8+ cell subset and down-regulation of CD28 and LFA-1 accessory molecules are associated with an increased risk of CMV retinitis in HIV-infected patients.
authors.affiliation: Department of Ophthalmology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA.
authors.forename: M L
authors.initials: ML
authors.lastname: Tay-Kearney
authors.forename: C
authors.initials: C
authors.lastname: Enger
authors.forename: R D
authors.initials: RD
authors.lastname: Semba
authors.forename: W
authors.initials: W
authors.lastname: Royal
authors.forename: J P
authors.initials: JP
authors.lastname: Dunn
authors.forename: D A
authors.initials: DA
authors.lastname: Jabs
mesh_terms: D017088:AIDS-Related Opportunistic Infections / Q000188:drug therapy / Q000276:immunology*; D000328:Adult; D018106:CD28 Antigens / Q000032:analysis; D017252:CD3 Complex / Q000032:analysis; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D016022:Case-Control Studies; D017726:Cytomegalovirus Retinitis / Q000150:complications / Q000188:drug therapy / Q000276:immunology*; D005260:Female; D016179:Granulocyte Colony-Stimulating Factor / Q000008:administration & dosage; D006801:Humans; D017493:Leukocyte Common Antigens / Q000032:analysis; D016169:Lymphocyte Function-Associated Antigen-1 / Q000032:analysis; D008297:Male; D011446:Prospective Studies; D016176:T-Lymphocyte Subsets / Q000276:immunology*
chemical_list: D018106:CD28 Antigens; D017252:CD3 Complex; D016169:Lymphocyte Function-Associated Antigen-1; D016179:Granulocyte Colony-Stimulating Factor; D017493:Leukocyte Common Antigens