title: Effects of smoking, aromatic amines, and chromates on CD4+ and CD8+ T lymphocytes in male workers.
abstract: To investigate effects of smoking, aromatic amines (AAs), and chromates (CRs) on T lymphocyte subpopulations, we measured CD3+, CD4+, and CD8+ T lymphocytes in the peripheral blood of 33 nonexposed workers, 25 AA-use workers, 27 AA-production workers, and 19 CR workers (all subjects were males). The number of CD4+ T lymphocytes in smokers of nonexposed workers was significantly larger than that of the nonsmokers; also, the numbers of CD4+ and CD3+ T lymphocytes in smokers of each group of AA-production and AA-use workers were significantly larger than those in nonsmokers. Number of CD4+ and CD3+ T lymphocytes in nonsmokers of AA-production and CR workers were significantly smaller than those in nonsmokers of nonexposed workers; the number of CD8+ T lymphocytes in nonsmokers of CR workers was significantly smaller than that in nonsmokers of nonexposed workers. The cross-sectional study suggests that (1) smoking increases CD4+ (and CD3+) T lymphocytes in all categories of workers except for CR workers; (2) exposure to CRs and AAs decreases CD4+ (and CD3+) T lymphocytes; (3) the magnitude of decrease in CD4+ T lymphocytes is large among CR workers, intermediate among AA-production workers, and small among AA-use workers regardless of smoking status; and (4) exposure to CRs also decreases CD8+ T lymphocytes.
authors.affiliation: Department of Public Health, Faculty 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: F
authors.initials: F
authors.lastname: Sata
authors.forename: A
authors.initials: A
authors.lastname: Nakata
authors.forename: T
authors.initials: T
authors.lastname: Araki
mesh_terms: D000328:Adult; D000368:Aged; D000588:Amines / Q000009:adverse effects*; D017252:CD3 Complex; D015496:CD4-Positive T-Lymphocytes; D018414:CD8-Positive T-Lymphocytes; D002840:Chromates / Q000009:adverse effects*; D006571:Heterocyclic Compounds / Q000009:adverse effects*; D006801:Humans; D018655:Lymphocyte Count; D016131:Lymphocyte Subsets / Q000187:drug effects*; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure; D012907:Smoking / Q000009:adverse effects*
chemical_list: D000588:Amines; D017252:CD3 Complex; D002840:Chromates; D006571:Heterocyclic Compounds