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. 1992 Feb;119(2):91–96. doi: 10.1007/BF01209662

Investigations of droloxifene and other hormone manipulations onN-nitrosomethylurea-induced rat mammary tumours

1. Influence on tumour growth

G Winterfeld 1, P Hauff 1, M Görlich 1, W Arnold 1, I Fichtner 1,✉, H J Staab 2
PMCID: PMC12200440  PMID: 1429831

Abstract

The effect of droloxifene, a new anti-oestrogenic drug, onN-nitrosomethylurea-induced mammary tumours of Sprague-Dawley rats was investigated and compared with that of tamoxifen. The response of tumour growth to ovariectomy or to treatment with aminoglutethimide or high doses of oestradiol was also studied. Ovariectomy was by far the most effective treatment for mammary-tumour-bearing animals. More than 75% of the tumours in ovariectomized rats did not grow progressively but remained in remission for up to 12 weeks after castration when the experiment was terminated. The inhibitory effects of droloxifene and tamoxifen on mammary tumour growth were similar, but body weight loss of animals treated with tamoxifen was more marked than that of animals treated with droloxifene at the same dose and schedule.

Key words: NMU-induced rat mammary tumours, Hormonal manipulation, Droloxifene, Tumour growth behaviour

Abbreviation

NMU

N-nitrosomethylurea

Footnotes

formerly: Central Insitute of Cancer Research

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