Investigations of droloxifene and other hormone manipulations on N-nitrosomethylurea-induced rat mammary tumours. 1. Influence on tumour growth

• Published in: Journal of cancer research and clinical oncology Vol. 119; no. 2; p. 91
• Main Authors: Winterfeld, G, Hauff, P, Görlich, M, Arnold, W, Fichtner, I, Staab, H J
• Format: Journal Article
• Language: English
• Published: Germany 1992
• Subjects: Animals; Antineoplastic Agents - therapeutic use; Body Weight - drug effects; Estrogen Antagonists - therapeutic use; Female; Mammary Neoplasms, Experimental - chemically induced; Mammary Neoplasms, Experimental - drug therapy; Methylnitrosourea; Ovariectomy; Rats; Rats, Sprague-Dawley; Tamoxifen - analogs & derivatives; Tamoxifen - therapeutic use
• ISSN: 0171-5216
• DOI: 10.1007/BF01209662

The effect of droloxifene, a new anti-oestrogenic drug, on N-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.