title: Increase in memory (CD4+CD29+ and CD4+CD45RO+) T and naive (CD4+CD45RA+) T-cell subpopulations in smokers.
abstract: To examine the effects of smoking on lymphocyte subpopulations, we measured the following cell subpopulations: CD4+ T-cell subpopulations (i.e., CD4+CD29+, CD4+ CD45RO+, and CD4+CD45RA+ cells); CD8+ T-cell subpopulations (i.e., CD8+CD11a+ and CD8+CD11b+ cells); and natural killer cell subpopulations (i.e., CD16+CD57-, CD16+CD57+, and CD16-CD57+ cells). We measured these subpopulations, together with total CD4+ T, total CD8+ T, total CD3+ T, B (CD19+), and total lymphocytes, in 10 male heavy smokers, 38 male light-to-moderate smokers, and 33 male nonsmokers. The mean ages were 30 y, 31 y, and 32 y, respectively, and ages did not vary significantly among the smokers. CD4+CD29+ and CD4+CD45RO+ (memory T) cells in heavy smokers were significantly more numerous than those in light-to-moderate smokers and nonsmokers. Also, these memory T-cell subpopulations were significantly more numerous in light-to-moderate smokers than in nonsmokers. The number of CD4+CD45RA+ (naive T) cells was significantly larger in heavy smokers than nonsmokers; numbers of CD4+CD45RO+ T and CD4+CD29+ T cells (memory T cells) were significantly correlated with daily cigarette consumption. Numbers of CD3+ T, CD4+ T, CD19+ B, and total lymphocytes in heavy smokers were significantly larger than in nonsmokers. There were significantly more CD3+ T, CD4+ T, and total lymphocytes in light-to-moderate smokers than in nonsmokers. The numbers of CD4+ T lymphocytes in heavy smokers were significantly larger than in light-to-moderate smokers. Perhaps CD4+ T cell subpopulations, especially memory T cells, are most susceptible to the effects of smoking on lymphocyte subpopulations.
authors.affiliation: Department of Public Health and Occupational Medicine, Graduate School of Medicine, University of Tokyo, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Tanigawa
authors.forename: S
authors.initials: S
authors.lastname: Araki
authors.forename: A
authors.initials: A
authors.lastname: Nakata
authors.forename: F
authors.initials: F
authors.lastname: Kitamura
authors.forename: M
authors.initials: M
authors.lastname: Yasumoto
authors.forename: S
authors.initials: S
authors.lastname: Sakurai
authors.forename: T
authors.initials: T
authors.lastname: Kiuchi
mesh_terms: D000328:Adult; D018941:Antigens, CD19 / Q000097:blood; D017252:CD3 Complex / Q000097:blood; D018791:CD4 Lymphocyte Count; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology*; D018959:CD57 Antigens / Q000097:blood; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D016022:Case-Control Studies; D006801:Humans; D019012:Integrin beta1 / Q000097:blood; D007694:Killer Cells, Natural / Q000276:immunology*; D017493:Leukocyte Common Antigens / Q000097:blood; D018655:Lymphocyte Count; D016169:Lymphocyte Function-Associated Antigen-1 / Q000097:blood; D016177:Macrophage-1 Antigen / Q000097:blood; D008297:Male; D017452:Receptors, IgG / Q000097:blood; D012907:Smoking / Q000097:blood / Q000276:immunology*; D016176:T-Lymphocyte Subsets / Q000276:immunology*
chemical_list: D018941:Antigens, CD19; D017252:CD3 Complex; D018959:CD57 Antigens; D019012:Integrin beta1; D016169:Lymphocyte Function-Associated Antigen-1; D016177:Macrophage-1 Antigen; D017452:Receptors, IgG; D017493:Leukocyte Common Antigens