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Philip Morris

Diesel Exhaust Is A Pulmonary Carcinogen in Rats Exposed Chronically by Inhalation

Date: 1987
Length: 1 page
2063594143
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Author
Griffith, W.C.
Henderson, R.F.
Jones, R.K.
Mauderly, J.L.
Mcclellan, R.O.
Characteristic
EXTR, EXTRA
Master ID
2063594010/4240
Related Documents:
Site
R530
Area
CARCHMAN,RICHARD/OFFICE
Litigation
Iwoh/Produced
Type
SCRT, REPORT, SCIENTIFIC
Named Organization
Fundamental + Applied Toxicology
Date Loaded
07 Jun 1999

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Page 1: 2063594143 Log in for more options!
! I I I I I I I I I I I I I I I I I #78 AUTHOR: MAUDERLY, JOE L., ROBERT K. JONES, WILLIAM C. GRIFRTH, ROGENE F. HENDERSON, AND ROGER O. McCLELLAN DATE: 1987 TITLE: DIESEL EXHAUST IS A PULMONARY CARCINOGEN IN RATS EXPOSED CHRONICALLY BY INHALATION CITATION: FUNDAMENTAL AND APPLIED TOXICOLOGY 9:208-221 (1987) STUDY DESIGN: Male and female F34 rats were exposed 7 hr/day, 5 days/week for up to 30 months to automotive diesel engine exhaust at soot concentrations of 0.35, 3.5 or 7.0 mg/ms or were sham-exposed to clean air. Rats were terminated at 6-month intervals to measure lung burdens of diesel soot and for histopathology. RNDINGSIRESULTS: Survival and body weight were unaffected by exposure. Focal fibrotic and proliferative lung disease accompanied a progressive accumulation of soot in the lung. The prevalence of lung ~mors was significantly increased at the high (13%) and medium (4%) dose levels above the control prevalence (1%). Four tumor types, all of epithelial origin were observed: adenoma, adenocarcinoma, squarnous cyst, and squamous cell carcinoma. Logistic regression modeling demonstrated a significant relationship between tumor prevalence and both exposure concentration and soot tung burden. CONCLUSIONS: These results demonstrate that diesel exhaust, inhaled chronically at a high concentration, is a pulmonary carcinogen in the rat.

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