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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Jpn+J+Cancer+Res
1991 ; 82
(12
): 1385-90
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Possible application to medium-term organ bioassays for renal carcinogenesis
modifiers in rats treated with N-ethyl-N-hydroxyethylnitrosamine and unilateral
nephrectomy
#MMPMID1778762
Hiasa Y
; Konishi N
; Nakaoka S
; Nakamura M
; Nishii S
; Kitahori Y
; Ohshima M
Jpn J Cancer Res
1991[Dec]; 82
(12
): 1385-90
PMID1778762
show ga
The effects of the renal tumor promoters; beta-cyclodextrin (beta-C), DL-serine
(DL-S), basic lead acetate (LA), trisodium nitrilotriacetate monohydrate (NTA)
and potassium bromate (KB), and diethylene glycol (DEG) as a negative control, on
early stage of renal carcinogenesis were investigated in unilaterally
nephrectomized male Wistar rats after N-ethyl-N-hydroxyethylnitrosamine (EHEN)
administration. Wistar male rats were fed 1000 ppm EHEN diet for 2 weeks and the
left kidney was removed at week 3, then the animals were divided into 7 groups of
15 rats each. These groups received the following treatments: 1000 ppm LA, 10000
ppm NTA or 500 ppm KB diet for 18 weeks from week 3; 45 mg/100 g body wt./day of
beta-C injected sc for 7 days; 100 mg/100 g body wt. of DL-S injected sc biweekly
for 6 weeks; 5% DEG in drinking water as a negative control for two days. Five
rats in each group were killed at weeks 8, 12 and 20 and their kidneys were
examined histologically. At week 20, the average numbers of adenomatous
hyperplasias seen as preneoplastic lesions in the beta-C, DL-S, LA, NTA or KB
groups were significantly higher than those in the DEG or control groups. Thus
within a relatively short period of 20 weeks, promoting effects of chemicals can
be detected as a significant increase of adenomatous hyperplasias in this model.