Warfarin inhibits metastasis of mtln3 rat mammary carcinoma without affecting primary tumour growth

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Warfarin inhibits metastasis of mtln3 rat mammary carcinoma without affecting primary tumour growth"


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ABSTRACT Coumarin anticoagulants inhibit metastasis in several animal models, but the mechanism of this effect is uncertain. In order to determine the role of cytotoxic and/or cytostatic


actions of coumarins on the tumour cells, we have studied the effects of warfarin on tumour cell growth in a model in which tumour metastasis is inhibited by this drug. Clonogenic assay,


growth curve analysis and thymidine labelling index revealed that warfarin had no effects on Mtln3 mammary carcinoma cell growth in vitro at concentrations below 1 mM. The growth rate of


subcutaneously implanted Mtln3 tumour deposits in female F344 rats, assessed by weight and by stathmokinetic analysis of the tumour tissue, was identical in warfarin-treated and control


animals. Spontaneous metastasis from such tumours to the lungs was, however, significantly reduced in warfarin-treated animals (median 0 pulmonary tumours per animal in warfarin treated,


eight tumours per animal in control animals; P less than 0.05, Mann-Whitney). The mean plasma warfarin concentration in warfarin treated rats was 1.63 microM. These results suggest that


warfarin treatment of the host animal can inhibit tumour metastasis without having any direct or indirect effect on the growth rate of the tumour cells. Access through your institution Buy


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Article Open access 16 May 2023 AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * University Department of Surgery, Western Infirmary, Glasgow, UK P McCulloch Authors * P McCulloch View author


publications You can also search for this author inPubMed Google Scholar * WD George View author publications You can also search for this author inPubMed Google Scholar RIGHTS AND


PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE McCulloch, P., George, W. Warfarin inhibits metastasis of Mtln3 rat mammary carcinoma without affecting primary


tumour growth. _Br J Cancer_ 59, 179–183 (1989). https://doi.org/10.1038/bjc.1989.37 Download citation * Issue Date: 01 February 1989 * DOI: https://doi.org/10.1038/bjc.1989.37 SHARE THIS


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