title: Matrix metalloproteinase inhibitor Ro 28-2653 in combination with estramustine: tumor-reducing effects on hormone-sensitive prostate cancer in rats.
abstract: Therapeutic efficacy of the novel matrix metalloproteinase (MMP) inhibitor, Ro 28-2653 (5-biphenyl-4-yl-5-[4-(-nitro-phenyl)-piperazin-1-yl]-pyrimidine-2,4,6-trione), has been shown in various models of different tumor entities. The tumor growth-reducing effect has been demonstrated in the orthotopic rat prostate Dunning model (subline MatLyLu). Based on these results we investigated Ro 28-2653 in combination with estramustine on the G subline of the Dunning tumor. This subline is characterized by a low metastatic ability and androgen sensitivity. Efficacy was determined by recording tumor growth in vivo by magnetic resonance imaging (MRI). Tumor cells were injected into the prostates of 81 Copenhagen rats. MRI was performed at day 100 and at day 126 after tumor cell injection. The duration of therapy was 17 days with daily oral application of Ro 28-2653 (100 mg/kg) and four i.p. injections of estramustine (7.5 mg/kg). Histological evaluations were conducted to provide further information about the effects on tumor morphology. Orthotopic tumor induction was successful in 100% of the animals. Tumor volume calculations with MRI showed a significant difference between the control groups, the animals treated with Ro 28-2653, and the animals treated with the combination of Ro 28-2653 and estramustine. The new MMP inhibitor Ro 28-2653 reduces tumor growth and provides a compatible therapeutic alternative for patients with prostate cancer.
authors.affiliation: Department of Urology, University Hospital Charité, Humboldt University Berlin, Germany. claudia.abramjuk@charite.de
authors.forename: Claudia
authors.initials: C
authors.lastname: Abramjuk
authors.forename: Klaus
authors.initials: K
authors.lastname: Jung
authors.forename: Hans-Willi
authors.initials: HW
authors.lastname: Krell
authors.forename: Rolf
authors.initials: R
authors.lastname: Juchem
authors.forename: Robert
authors.initials: R
authors.lastname: Peters
authors.forename: Kasra
authors.initials: K
authors.lastname: Taymoorian
authors.forename: Andrea
authors.initials: A
authors.lastname: Staack
authors.forename: Carsten
authors.initials: C
authors.lastname: Stephan
authors.forename: Joerg
authors.initials: J
authors.lastname: Schnorr
authors.forename: Stefan A
authors.initials: SA
authors.lastname: Loening
authors.forename: Michael
authors.initials: M
authors.lastname: Lein
mesh_terms: D000818:Animals; D018931:Antineoplastic Agents, Hormonal / Q000627:therapeutic use*; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D004359:Drug Therapy, Combination; D004961:Estramustine / Q000627:therapeutic use*; D008297:Male; D061965:Matrix Metalloproteinase Inhibitors; D020782:Matrix Metalloproteinases / Q000378:metabolism; D009376:Neoplasms, Hormone-Dependent / Q000188:drug therapy* / Q000556:secondary; D010879:Piperazines / Q000627:therapeutic use*; D011471:Prostatic Neoplasms / Q000188:drug therapy* / Q000473:pathology; D011743:Pyrimidines / Q000627:therapeutic use*; D051381:Rats; D011919:Rats, Inbred Strains; D015996:Survival Rate; D013997:Time Factors; D014407:Tumor Cells, Cultured
chemical_list: D018931:Antineoplastic Agents, Hormonal; D061965:Matrix Metalloproteinase Inhibitors; D010879:Piperazines; D011743:Pyrimidines; C453902:Ro 28-2653; D004961:Estramustine; D020782:Matrix Metalloproteinases