Effect of carcinogens on chicken atherosclerosis.
Weekly i.m. injections of the polycyclic hydrocarbon carcinogens, 7,12-dimethylbenz(a,h)anthracene (DMBA; 25 mg/kg/injection) and benzo(a)pyrene (50 mg/kg/injection) were given for a period of up to 22 weeks to chickens (SC strain) beginning at age 4 weeks. Atherosclerotic lesions of the abdominal aorta occurred more frequently and were larger in the DMBA- and benzo(a)pyrene-treated birds than in controls. These lesions were proliferative in character as indicated by a higher [3H]thymidine autoradiographic labeling index compared to the underlying medial cells of the aorta. Measurements of serum cholesterol in DMBA-treated birds showed no differences from controls. Although both carcinogens accelerated the development of atherosclerotic plaques, DMBA was more potent than benzo(a)pyrene.
D015127:9,10-Dimethyl-1,2-benzanthracene / Q000633:toxicity*; D000818:Animals; D001012:Aorta, Abdominal; D001161:Arteriosclerosis / Q000097:blood / Q000139:chemically induced* / Q000378:metabolism; D001551:Benz(a)Anthracenes / Q000633:toxicity*; D001580:Benzopyrenes / Q000633:toxicity*; D002455:Cell Division; D002645:Chickens; D002784:Cholesterol / Q000097:blood; D013936:Thymidine / Q000378:metabolism; D013997:Time Factors
D001551:Benz(a)Anthracenes; D001580:Benzopyrenes; D015127:9,10-Dimethyl-1,2-benzanthracene; D002784:Cholesterol; D013936:Thymidine