Sublethal alterations and sustained cell proliferation associated with the diethylstilbestrol-induced renal carcinogenesis in male Syrian golden hamsters
[en] The current study was initiated to explore the sublethal alterations and the tissue damage occurring in the hamster kidney during diethylstilbestrol-induced renal carcinogenesis. A total of 49 male Syrian golden hamsters (35 treated and 13 control animals) was utilized in the experimental procedure. Chronic exposure to diethylstilbestrol was achieved by s.c. insertion of implants containing 25 mg diethylstilbestrol. For long-term observation, adequate blood level of diethylstilbestrol was insured by renewing the implant every 2 months. Experimental groups (n = 4 to 9) were terminated 1, 2, 4, 6, 9 and 11 months after initial implantation for morphological examination of the kidney. Diethylstilbestrol carcinogenicity in this experimental model was confirmed by the observation that most animals undergoing drug exposure for 6 months or more exhibited renal neoplasms. The most striking nonneoplastic morphological abnormality disclosed by histological and cytological examination consisted in the accumulation of granular inclusions in proximal tubule cells. In renal tissue, the extent of cell proliferation determined by PCNA labeling progressively increased along with the duration of diethylstilbestrol exposure and suggested a sustained proliferative response in altered proximal tubules. The present data suggest that an impairment of functional tubular regeneration could promote, as well as the estrogen genotoxic effect, the tumorigenicity of diethylstilbestrol in the kidney of male hamsters
Sublethal alterations and sustained cell proliferation associated with the diethylstilbestrol-induced renal carcinogenesis in male Syrian golden hamsters
Publication date :
01 April 1998
Journal title :
European Journal of Morphology
ISSN :
0924-3860
Publisher :
Swets & Zeitlinger, Netherlands
Volume :
36
Issue :
2
Pages :
83-96
Peer reviewed :
Peer Reviewed verified by ORBi
Research unit :
M118 - Histologie
Research institute :
R550 - Institut des Sciences et Technologies de la Santé
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