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Current Medicinal Chemistry

Editor-in-Chief

ISSN (Print): 0929-8673
ISSN (Online): 1875-533X

Synergetic Bitherapy in Mice with Xenografts of Human Prostate Cancer Using a Methional Mimic (METLICO) and an Aldehyde Dehydrogenase 3 Inhibitor (MATE): Systemic Intraperitoneal (IP) and Targeted Intra-Tumoral (IT) Administration

Author(s): E. Hiltbrand, G. Fournet, J-P. Giliberto, M-J. Paret, J. Chantepie, D. Morel, J. Gore, U. Reichert, H. Mehier, M-E. Rochedix and G. Quash

Volume 16 , Issue 10 , 2009

Page: [1184 - 1191] Pages: 8

DOI: 10.2174/092986709787846596

Price: $65

Abstract

An intraperitoneal (IP) monotherapy in nu/nu mice with subcutaneous xenografts of a human prostate epithelial cancer cell line:DU145 was undertaken with an aldehyde dehydrogenase 3 inhibitor MATE, that is a potent apoptogen on (DU145) in culture but not on their human prostate epithelial normal counterparts [13] . Tumour growth was slowed down but treatment had to be done 5days/week. To try to potentiate the action of MATE in vivo, a bitherapy was undertaken based on the synergetic apoptotic effect that had been observed previously in culture on DU145 treated with a methional mimic METLICO and DIMATE, an inhibitor of ALDH1 and ALDH3[19]. The bitherapy with METLICO/MATE administered IP was as effective as the monotherapy with MATE alone by IP, but at a 2-fold lower dose of MATE and at a dose of METLICO that had no growth-inhibitory effect as a monotherapy . Hence there was definite synergism with bitherapy. To try to increase the efficacy of bitherapy, it was administered by the intra-tumoral (IT) route using the recently developed 20-bars-pressurized microinjection system from CERMA [16, 17]. IT administration of the bitherapy was indeed more effective than that by IP as regards tumour volumes are concerned. Histopathological analysis of IT-treated tumours confirmed that there were many necrotized zones but intact cells were still present. Approaches for treating a wider zone of tumour tissue by IT-bitherapy are discussed.

Keywords: Xenografts, Prostate Cancer, Methional Mimic (METLICO), Aldehyde Dehydrogenase 3 Inhibitor (MATE), Systemic Intraperitoneal (IP)


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