title: Immunological investigations in a group of workers exposed to various levels of polycyclic aromatic hydrocarbons.
abstract: To evaluate a possible immunotoxic effect of chronic exposure to polycyclic aromatic hydrocarbons (PAHs), several immune parameters were investigated in two groups of coke-oven workers. Exposure levels were different for both groups, one group being employed in a new coking facility of sophisticated technical standard, and the other in a facility with rather high emission of PAH-containing dust, built during the late 1960s. Immunomodulating effects of exposure were found on three levels of immunity: a reduced mitogenic response of T cells to phytohaemagglutinin observed by a reduced rate of DNA synthesis and a retardation in the expression of interleukin 2 receptor; an impairment of B cell activity, observed by a reduced proliferation of B cells and a low synthesis of immunoglobulin M after Staphylococcus aureus stimulation; a reduced oxidative burst in monocytes after challenge with E. coli. The differences in numbers of lymphocytic subpopulations in peripheral blood and in immunoglobulin levels of serum were statistically insignificant. The data of the present investigations point to significant, albeit slight, changes in immune function by PAH exposure. But these changes could not yet be related to health impacts of the exposure.
authors.affiliation: Allgemeine Unfallversicherungsanstalt, Wien, Austria.
authors.forename: N
authors.initials: N
authors.lastname: Winker
authors.forename: H
authors.initials: H
authors.lastname: Tuschl
authors.forename: R
authors.initials: R
authors.lastname: Kovac
authors.forename: E
authors.initials: E
authors.lastname: Weber
mesh_terms: D000328:Adult; D001317:Austria; D001402:B-Lymphocytes / Q000187:drug effects* / Q000276:immunology; D002617:Chemical Industry; D003077:Coke; D005434:Flow Cytometry; D006801:Humans; D016130:Immunophenotyping; D008213:Lymphocyte Activation; D016131:Lymphocyte Subsets / Q000276:immunology; D008297:Male; D008875:Middle Aged; D009000:Monocytes / Q000187:drug effects* / Q000276:immunology; D016273:Occupational Exposure / Q000009:adverse effects*; D010835:Phytohemagglutinins; D011084:Polycyclic Aromatic Hydrocarbons / Q000009:adverse effects*; D016897:Respiratory Burst; D012907:Smoking; D013601:T-Lymphocytes / Q000187:drug effects* / Q000276:immunology
chemical_list: D003077:Coke; D010835:Phytohemagglutinins; D011084:Polycyclic Aromatic Hydrocarbons