Hormone status in occupational toluene exposure.
Twenty toluene-exposed rotogravure printers, without signs of solvent-induced toxic encephalopathy, had lower median plasma levels of follicle stimulating hormone (FSH) (3.2 vs. 4.9 IU/L; p = .02) and luteinizing hormone (LH) (6.4 vs. 7.2 IU/L; p = .05) and also lower serum levels of free testosterone (7.8 vs. 86.8 pmol/L; p = .05), respectively, than 44 unexposed referents. The individual time-weighted toluene levels in air were 36 (median; range 8-111) ppm. The printers' median toluene levels in blood were 1.7 (1.0-6.6) mumol/l, and in subcutaneous adipose tissue 5.7 (2.5-21) mg/kg fat. There was a negative association between blood toluene and plasma levels of prolactin. In eight printers, the levels of FSH and LH increased during a 4 week vacation, while the levels of thyroid stimulating hormone, free triiodothyronine, and free thyroxine decreased during the same period. The results indicate a slight, reversible effect of toluene on the cortical level or on the hypothalamic-pituitary axis at exposures well below the permissible levels, possibly mediated through an effect on catecholamine neurotransmission.
Svensson
B G
BG
Department of Occupational Medicine, University Hospital, Lund, Sweden.
Nise
G
G
Erfurth
E M
EM
Nilsson
A
A
Skerfving
S
S
D000273:Adipose Tissue / Q000737:chemistry; D000328:Adult; D000395:Air Pollutants, Occupational / Q000009:adverse effects / Q000032:analysis; D005640:Follicle Stimulating Hormone / Q000097:blood*; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood*; D008297:Male; D008875:Middle Aged; D016273:Occupational Exposure / Q000009:adverse effects* / Q000032:analysis; D011327:Printing; D011388:Prolactin / Q000097:blood; D013739:Testosterone / Q000097:blood*; D013972:Thyrotropin / Q000097:blood; D014050:Toluene / Q000009:adverse effects* / Q000032:analysis
D000395:Air Pollutants, Occupational; D014050:Toluene; D013739:Testosterone; D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D013972:Thyrotropin