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Toxicity of Furfuryl Alcohol to F344 Rats and B6C3F 1 Mice Exposed by Inhalation
Author(s) -
Irwin Richard D.,
Chou B. J.,
Mellick P. W.,
Miller R. A.,
Mahler Joel,
Roycroft Joe
Publication year - 1997
Publication title -
journal of applied toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.784
H-Index - 87
eISSN - 1099-1263
pISSN - 0260-437X
DOI - 10.1002/(sici)1099-1263(199705)17:3<159::aid-jat420>3.0.co;2-e
Subject(s) - squamous metaplasia , olfactory epithelium , inhalation exposure , metaplasia , respiratory epithelium , hyperplasia , inhalation , pathology , respiratory system , epithelium , corn oil , toxicity , furfuryl alcohol , necrosis , medicine , chemistry , endocrinology , physiology , anesthesia , biochemistry , receptor , catalysis
Groups of F344 rats and B6C3F 1 mice were exposed to furfuryl alcohol vapor for 6 hours per day, 5 days per week for 14 days (0, 16, 31, 63, 125, 250 ppm) or 13 weeks (0, 2, 4, 8, 16, 32 ppm). Reduced survival was observed in the 14‐day study at 250 ppm. Final mean body weights of rats and mice exposed to 125 ppm and of female mice exposed to 63 ppm were lower than controls at the end of the 14‐day study; there were no significant differences in mean body weight among chemical‐exposed and control groups in the 13‐week study. Exposure to furfuryl alcohol had no toxicologically significant effect on organ weights in either rats or mice, and did not cause any adverse changes in hematology or serum chemistry parameters evaluated in rats in the 13‐week study. Microscopic lesions associated with exposure to furfuryl alcohol were present in the nose of both rats and mice at all exposure concentrations in both the 14‐day and 13‐week studies. Lesions observed in the 14‐day study consisted of inflammation of the nasal turbinates accompanied by necrosis and squamous metaplasia of the respiratory epithelium and necrosis and degeneration of the olfactory epithelium. Similar lesions were observed in both rats and mice in the 13‐week study. In addition, squamous metaplasia and goblet cell hyperplasia of the respiratory epithelium, squamous metaplasia of the transitional epithelium and degeneration, hyperplasia and some respiratory metaplasia of the olfactory epithelium were also observed in rats in the 13‐week study, and hyaline droplets in the respiratory epithelium and chronic inflammation and respiratory metaplasia in the olfactory epithelium were observed in mice in the 13‐week study. In general the nasal passages of mice appeared less sensitive than those of rats at the concentrations used in the 13‐week study; a no‐observable‐effect level was not achieved in either the 14‐day or the 13‐week study. ©1997 by John Wiley & Sons, Ltd.