Prevention of prostate‐cancer metastasisin vivoby a novel synthetic inhibitor of urokinase‐type plasminogen activator (uPA)
| Autor: | Shafaat A. Rabbani, Penelope Harakidas, Donald J. Davidson, Andrew P. Mazar, Jack Henkin |
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| Rok vydání: | 1995 |
| Předmět: |
Male
Cancer Research Pathology medicine.medical_specialty Amidines Thiophenes Biology Metastasis Prostate cancer In vivo Prostate Tumor Cells Cultured medicine Animals Humans Enzyme Inhibitors Neoplasm Metastasis Urokinase Dose-Response Relationship Drug Prostatic Neoplasms Cancer medicine.disease Urokinase-Type Plasminogen Activator Primary tumor Rats medicine.anatomical_structure Oncology Plasminogen activator medicine.drug |
| Zdroj: | International Journal of Cancer. 63:840-845 |
| ISSN: | 1097-0215 0020-7136 |
| DOI: | 10.1002/ijc.2910630615 |
| Popis: | Urokinase-type plasminogen activator (uPA) is a serine protease associated with tissue remodeling, cellular invasiveness, matrix degradation and tumor growth. Over-expression of uPA by the rat prostate-cancer cell line Dunning R3227, Mat LyLu, results in increased tumor metastasis to several non-skeletal and skeletal sites. Histological examination of these skeletal lesions has shown them to be primarily osteoblastic. In the present study we examined the capacity of a selective inhibitor of uPA enzymatic activity, 4-iodo benzo[b]thiophene-2-carboxamidine (B-428), to prevent the development of tumor growth and invasiveness in a syngeneic model of rat prostate cancer using a Dunning R3227 cell line over-expressing rat uPA. Male Copenhagen rats were inoculated s.c. with experimental cells into the right flank and continuously infused i.p. with either vehicle alone or uPA inhibitor for 2 to 3 weeks. Animals were killed at timed intervals and evaluated for the development of tumor growth and metastasis. Serum from these animals was collected to examine any signs of nephrotoxicity. Control animals receiving vehicle alone developed large tumors at the site of inoculation as well as macroscopic metastases in the lungs, kidney, spleen and lymph nodes. In contrast, experimental animals receiving uPA inhibitor showed a marked decrease in primary tumor volume and weight as well as in the development of tumor metastases. The occasional tumor metastases observed after infusion of B-428 were significantly smaller than those observed in vehicle controls. These effects of B-428 were found to be dose-dependent without any adverse effects on the renal function of experimental animals. These studies demonstrate that uPA-specific inhibitors can decrease primary tumor volume and invasiveness as well as metastasis in a model of prostate cancer where uPA has been implicated as a major pathogenetic factor. |
| Databáze: | OpenAIRE |
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