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Induction of squamous cell carcinomas in the mouse lung after long-term inhalation of polycyclic aromatic hydrocarbon-rich exhausts

 
: Schulte, A.; Ernst, H.; Peters, L.; Heinrich, U.

Experimental and Toxicologic Pathology 45 (1994), Nr.7, S.415-421
ISSN: 0940-2993
Englisch
Zeitschriftenaufsatz
Fraunhofer ITA ( ITEM) ()
benzo(a)pyrene; carcinogen; Carcinogenesis; carcinogenicity testing; inhalation toxicology; lung; lung tumor; mouse; polycyclic aromatic hydrocarbon; respiratory organ; squamous cell tumor; toxicology; tumor; tumor pathology

Abstract
A 10-months inhalation study using newborn female mice was performed to determine pulmonary tumorigenicity of polycyclic aromatic hydrocarbon(PAH)-enriched exhausts. At two exhaust doses containing 50 ug/m3 (group II) and 90 ug/m3 benzo(a)pyrene (BaP) (group III a significant increase of lung tumors was observed and the incidence of malignant lung tumors was dose-dependent. Bronchiolo-alveolar adenomas were observed in all mice of groups II and III (40/40 each) as compared to 5/40 in the control (group I). Bronchiolo-alveolar adenocarcinomas developed in 10/40 and in 33/40 mice of groups II and II, respectively, but were absent in group I. Single or multiple squamous cell carcinomas, which showed variable degrees of differentiation were observed exclusively in 6 mice of group III. One adenosquamous carcinoma was seen in an further animal of this group.

: http://publica.fraunhofer.de/dokumente/PX-18177.html