Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts:   Target Concepts:
Query: EC:3.4.21.73 (urokinase-type plasminogen activator)
 10,685 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Previous studies have established that plasma cryoprecipitates of tumor patients, culture media of transformed cells and defined proteolytic fragments of fibronectin enhance the morphological cell transformation ( TEF activity) in cultures of chicken embryo fibroblasts infected with temperature-sensitive mutants of Rous sarcoma virus. We now report that purified human tissue type plasminogen activator (t-PA), but not urokinase (u-PA), has a similar TEF activity, at doses as low as 2 ng/ml (30 pM). Specific antibodies effectively neutralized the activity. No significant contamination (less than or equal to 1%) between the preparations of t-PA and fibronectin (FN) or its fragments ( FNdp ) was detected. The results suggest that t-PA may have a direct role in the process of morphological cell transformation in vitro.
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PMID:Tissue type plasminogen activator, but not urokinase, exerts transformation-enhancing activity. 653 4

Using colony formation technique and KK-47 cell line established from a human bladder transitional cell carcinoma, the effect of 6 anticancer drugs, thio-TEPA, Bleomycin, mitomycin C, carbazilquinone, Adriamycin and cis-Platinum, were compared. On the results of tests performed to establish the drug concentration required to achive a 50% inhibition of cell survival, carbazilquinone was chosen for the prevention of recurrences of bladder cancer. The two groups studied consisted of 56 patients (previously untreated groups) who were rendered free of tumours by surgical intervention and of 19 patients (thio-TEPA failures group) who had experienced a persistent recurrence of tumours after prophylactic thio-TEPA instillations and were presumed free of the recurrence of tumours after the next surgical intervention. The 2 groups were subjected to prophylactic combined intravesical instillation therapy with carbazilquinone and urokinase. In the previously untreated group, 6 of the 56 patients (10.7%) had a recurrence of tumours, and the recurrence rate after 21 months was 16.7%, using the actuarial method. In the thio-TEPA failures group, 12 of the 19 patients (63.2%) had a recurrence of tumours, a rate at 21 months of 76.1%. A considerable drop in the recurrence rate was obtained by the combined instillation therapy in the previously untreated group. The results in the thio-TEPA failures group suggested the presence of a cross-resistance between both alkylating agents, and of a persistent susceptibility to multifocal lesions. No bone marrow depression was observed but an episode of anaphylactic shock attributable to the use of carbazilquinone occurred in 1 out of a total 75 patients.
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PMID:Anticancer drug sensitivity in vitro in the bladder cancer cell line, KK-47 and prophylactic use of carbazilquinone and urokinase in bladder cancer. 702 55