Reliability of a short-term test for hepatocarcinogenesis induced by aflatoxin B1.
The reliability of a short-term test for hepatocarcinogenesis induced by aflatoxin B1 (AFB1) was tested by comparing the early appearance of gamma-glutamyl transpeptidase (GGT)-positive foci with the occurrence of primary liver cancer at a later stage. All rats received a basic short-term treatment with AFB1 intraperitoneally, during which three experimental groups received Chinese green tea or 2000 or 5000 ppm butylated hydroxyanisole in the diet and a control group received basic diet. Some of the rats in each group were sacrificed at the end of the short-term procedure, and the remainder were observed up to 92 weeks. The livers of all animals were examined for GGT-positive foci or primary liver tumours. The GGT-positive foci were most numerous and largest and the incidence of liver tumours was highest in the control group. These findings suggest that GGT-positive foci are a valuable preneoplastic marker for AFB1-induced hepatocarcinogenesis, that the short-term model is fairly reliable, and that both Chinese green tea and butylated hydroxyanisole inhibit AFB1-induced hepatocarcinogenesis.
Li
Y
Y
Department of Pathology, Guangxi Cancer Institute, Nanning, China.
Yan
R Q
RQ
Qin
G Z
GZ
Qin
L L
LL
Duan
X X
XX
D016604:Aflatoxin B1; D000348:Aflatoxins / Q000633:toxicity*; D000818:Animals; D002273:Carcinogens; D008114:Liver Neoplasms, Experimental / Q000139:chemically induced*; D008297:Male; D011230:Precancerous Conditions / Q000139:chemically induced; D051381:Rats; D011919:Rats, Inbred Strains; D005723:gamma-Glutamyltransferase / Q000032:analysis
D000348:Aflatoxins; D002273:Carcinogens; D016604:Aflatoxin B1; D005723:gamma-Glutamyltransferase