Decreases of Natural Killer Cells and T-Lymphocyte Subpopulations and Increases of B Lymphocytes Following a 5-Day Occupational Exposure to Mixed Organic Solvents

Takeshi Tanigawa Department of Public Health and Occupational Medicine Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; Institute of Community Medicine, University of Tsukuba, Tsukuba, Japan

Shunichi Araki Department of Public Health and Occupational Medicine Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; National Institute of Industrial Health, Kawasaki, Japan

Akinori Nakata Department of Public Health and Occupational Medicine Graduate School of Medicine, The University of Tokyo, Tokyo, Japan; National Institute of Industrial Health, Kawasaki, Japan

Kazuhito Yokoyama Department of Public Health and Occupational Medicine Graduate School of Medicine, The University of Tokyo, Tokyo, Japan

Tadashi Sakai Center for Occupational Medicine Tokyo Rosai (Labor Accident) Hospital, Tokyo, Japan

Susumu Sakurai Department of Central Laboratory, University of Tokyo Hospital Faculty of Medicine, Tokyo, Japan

Abstract

The authors examined the effects of organic solvents on lymphocyte subpopulations in blood. Natural killer and T-lymphocyte subpopulations and B (CD19+) -lymphocytes were measured with flow cytometry in 16 male rotogravure printers on a Friday and on the following Monday. Numbers of all 3 subpopulations of natural killer cells (i.e., CD57+ CD16+, CD57-CD16+ and CD57+CD16- cells), 2 subpopulations of T lymphocytes (CD4+ CD45RA+ and total CD8+ cells) and total lymphocytes on Friday were significantly fewer than those found on the following Monday. Conversely, the number of B lymphocytes on Friday was significantly larger than the number on Monday. The number of B lymphocytes was significantly correlated with blood toluene levels on Friday. The alteration in the number of CD57+CD16+ NK cells from Friday to the following Monday was correlated inversely with the corresponding change in exposure level of toluene on Friday. The authors suggest that the effects of mixed organic solvents (primarily toluene) are recoverable decreases of natural killer cells and T lymphocytes and increases in B lymphocytes.

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Decreases of Natural Killer Cells and T-Lymphocyte Subpopulations and Increases of B Lymphocytes Following a 5-Day Occupational Exposure to Mixed Organic Solvents

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Decreases of Natural Killer Cells and T-Lymphocyte Subpopulations and Increases of B Lymphocytes Following a 5-Day Occupational Exposure to Mixed Organic Solvents

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