The antiangiogenic and antitumoral activity of titanocene Y* in vivo

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Item Type:	Article
Title:	The antiangiogenic and antitumoral activity of titanocene Y* in vivo
Creators Name:	Fichtner, I., Behrens, D., Claffey, J., Deally, A., Gleeson, B., Patil, S., Weber, H. and Tacke, M.
Abstract:	The 4-diethylaminomethylbenzyl-substituted titanocene dichloride (Titanocene Y), which is completely water- soluble and showed nanomolar activity against the human renal cancer cells CAKI-1, was tested in vitro in an antiangiogenesis assay against human umbilical vein endothelial cells, HUVEC, delivering an IC50 value of 23 +/- 17 {Mu}M. Titanocene Y was then given at 25, 50 and 75 mg/kg/d, on five consecutive days per week for up to three weeks to one cohort of six CAKI-1 tumor-bearing female NMRI:nu/nu mice, while a further cohort was treated with solvent only. At the two higher dosages Titanocene Y* showed high toxicity leading to mortality, while the titanocene-treated mouse cohort treated with the lowest dosage showed a moderate but statistically significant tumor growth reduction with respect to the solvent-treated control group, with an optimal T/C value of 76% at the end of the experiment. Immunohistological analysis revealed that the expression of the proliferation marker Ki-67 was reduced by 21%. Furthermore, anti-angiogenic activity was identified by CD31 staining; the number of micro vessels in a defined tumor area decreased by 23% due to Titanocene Y* treatment. The substance caused dose-dependent body weight loss but did not reduce the number of white blood cells at doses of 25 and 50 mg/kg/d.
Keywords:	Anticancer Drug, Anti-Angiogenic Drug, Titanocene, Renal Cell Cancer, Xenograft, HUVEC, Malignant Disease, Adult Kidney, Adult Malignancies, Adenocarcinoma, Sunitinib, Sorafenib, Temsirolimus, Bevacizumab, Dichloride, Tumor Area
Source:	Letters in Drug Design & Discovery
ISSN:	1570-1808
Publisher:	Bentham
Volume:	8
Number:	4
Page Range:	302-307
Date:	May 2011
Official Publication:	https://doi.org/10.2174/157018011794839367

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