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• W2159745690 abstract "We have studied the acute and subchronic oral toxicities of benzo[a]pyrene (BaP) in male and female F-344 rats. Single acute BaP doses of 0, 100, 600, and 1000 mg /kg dissolved in peanut oil were administered by oral gavage. Subchronic doses of 0, 5, 50, and 100 mg/kg/day were administered for 90 days in the animal diet. The major toxicological endpoints examined included animal body weight, selected tissue weights, and histopathological examinations (liver, kidney, stomach, prostate, testes, and ovaries). In addition, we examined blood elements: red blood cells (RBC), white blood cells (WBC), hemoglobin (Hgb), hematocrit (Hct), mean cell volume (MCV), mean cell hematocrit (MCH), and mean cell hemoglobin concentration (MCHC), blood chemistry (ALT, AST, and BUN), and urine chemistry (glucose, bilirubin, specific gravity, pH, protein, urobilinogen, nitrite, occult blood, and leucocytes). In the acute study, WBC were significantly decreased and mean cell-hemoglobin concentration was significantly increased, both in males only. The liver:body weight ratio was significantly increased in males and females (up to 30%). None of the blood chemistry or urine parameters were significantly affected. In the subchronic study, mean body weight was significantly decreased in males only (13%), and the liver:body weight ratio in males was significantly increased. Several of the blood elements were significantly decreased in males and females after 90 days; RBCs (up to 10%), Hct (up to 12%), and Hgb (up to 12%). For blood chemistry parameters (AST, ALT, BUN), only BUN in males was significantly increased in the high dose group (100 mg/kg) at the 90 day time point. The histopathological examination of selected tissues showed significant abnormalities (tubular casts) only in the male kidney, at the 2 highest doses, after 90 days. These studies indicate that the acute and subchronic toxicities of BaP are relatively low, BaP affects specific blood elements and organs, and BaP has a greater effect on males than females. The induction of non-carcinogenic kidney abnormalities in males only may be indicative of renal dysfunction and further substantiates an apparent sex difference in tolerance to BAP:" @default.
• W2159745690 created "2016-06-24" @default.
• W2159745690 creator A5005886974 @default.
• W2159745690 date "2001-06-01" @default.
• W2159745690 modified "2023-10-18" @default.
• W2159745690 title "Acute and Subchronic Oral Toxicities of Benzo[a]pyrene in F-344 Rats" @default.
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• W2159745690 doi "https://doi.org/10.1093/toxsci/61.2.382" @default.
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