Knebel, N. and Schiller, C. D. and Schneider, M. R. and Schönenberger, H. and Angerer, E. von (1989) Carrier mediated action of platinum complexes on estrogen receptor positive tumors. European journal of cancer & clinical oncology 25 (2), pp. 293-299.
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Three 1,2-diaminoethane-dichloro-platinum(II) complexes linked to 5-hydroxy-2-(4-hydroxyphenyl)-3-methylindole by spacer groups of varying length were evaluated for cytostatic activity in estrogen receptor (ER) positive and negative tumor cells. In vitro, only the growth of ER positive MCF-7 mammary tumor cells was inhibited whereas hormone independent MDA-MB 231 cells did not respond. In vivo, a strong inhibitory effect was only observed in ER positive MXT mammary tumors of the mouse. The complex with a hexyl group as spacer reduced the tumor weight by 89% after 6 weeks of treatment. The R 3327 Dunning prostatic tumor of the rat, which also contains ER was inhibited, too. Generally, the effect in ER negative tumors was weak. These findings can be rationalized by the high binding affinities of the complexes for ER. By the mouse uterine weight test it was shown that the endocrine activity of the complexes is very low. Therefore, a mode of action different from that exerted by estrogens or antiestrogens has to be assumed.
|Institutions:|| Chemistry and Pharmacy > Institute of Pharmacy > Retired Professors > Prof. Schönenberger|
Chemistry and Pharmacy > Institute of Pharmacy > Pharmaceutical/Medicinal Chemistry II (Prof. Buschauer)
|Subjects:||500 Science > 570 Life sciences|
500 Science > 540 Chemistry & allied sciences
|Refereed:||Yes, this version has been refereed|
|Created at the University of Regensburg:||Yes|
|Owner:||Prof. Armin Buschauer|
|Deposited On:||11 Dec 2008 15:47|
|Last Modified:||19 Aug 2010 12:02|