Abstract:
:Malignant cells possess a high degree of proteolytic activity in which the plasminogen activator system plays an important role. An increased expression of urokinase type plasminogen activator (uPA) is of significance for degradation of the extracellular tumor matrix, facilitating invasiveness and growth. Inhibition of the active site of uPA makes it possible to evaluate the significance of uPA in tumor growth. We report here experiments on a uPA-producing human prostate xenograft (DU 145) using a competitive inhibitor of uPA, p-aminobenzamidine. In vitro experiments with DU 145 cells showed that p-aminobenzamidine caused a dose-dependent inhibition of uPA activity. DU 145 cells were inoculated s.c. in SCID mice and, once tumors were established, treatment with p-aminobenzamidine added to drinking water was started and lasted for 23 days. Mice receiving 250 mg/kg/day of p-aminobenzamidine showed a clear decrease in tumor-growth rate compared to the non-treated mice, resulting in 64% lower final tumor weight. In addition, uPA-antigen levels in the membrane fractions of DU 145 tumors from p-aminobenzamidine-treated mice were found to be decreased by 59%. We also show that p-aminobenzamidine has an anti-proliferative effect in cell culture at low cell number, correlating with a dose-dependent decrease in uPA production. In conclusion, we show that a low-molecular-weight uPA-inhibitor, p-aminobenzamidine, has a growth-inhibitory effect on a solid uPA-producing tumor.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Billström A,Hartley-Asp B,Lecander I,Batra S,Astedt Bdoi
10.1002/ijc.2910610419subject
Has Abstractpub_date
1995-05-16 00:00:00pages
542-7issue
4eissn
0020-7136issn
1097-0215journal_volume
61pub_type
杂志文章abstract::Transforming growth factor-beta (TGF-beta1) is a potent negative regulator of cell growth that transduces signals through interactions with type I and II receptors. Abnormal expression and mutational alterations of these receptors have been observed in several human malignancies. In this study, we investigated the exp...
journal_title:International journal of cancer
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abstract::The human MUC1 gene expresses at least 2 type 1 membrane proteins: MUC1/REP, a polymorphic high m.w. MUC1 glycoprotein often highly expressed in breast cancer tissues and containing a variable number of tandem 20 amino acid repeat units, and the MUC1/Y protein, which lacks this repeat array and, therefore, is not poly...
journal_title:International journal of cancer
pub_type: 杂志文章
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journal_title:International journal of cancer
pub_type: 杂志文章,meta分析
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更新日期:2015-01-01 00:00:00
abstract::Chemokines and chemokine receptors mediate lymphocyte migration and tissue localization. To analyze CCL5 (RANTES) expression by EBV-infected cells, we examined the expression of CCL5 in BL cell lines. Among 4 BL cell lines, those infected with EBV selectively expressed the CCL5 gene and secreted CCL5. Four cell lines ...
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abstract::DNA sequences coding for simian virus 40 (SV40) large T antigen have been detected at different frequencies in human non-Hodgkin's lymphomas (NHL) by PCR techniques as well as immunohistochemistry. A highly sensitive quantitative real-time PCR specific for a sequence of SV40 large T antigen was established to test whe...
journal_title:International journal of cancer
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abstract::Dietary intake of many fruits and vegetables has been shown to be associated with reduced risk of cancer. We investigated the in vivo efficacy of grape seed extract (GSE, patented as Traconol) against prostate cancer (PCA) and associated molecular events. Athymic nude mice were implanted with hormone-refractory human ...
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abstract::The prevalence of adult T-cell-leukemia virus (ATLV) infection was examined in Japanese monkeys living naturally in various parts of Japan and in other species of non-human primates imported into and kept in Japan. Sera of 2,650 Japanese monkeys from 41 troops throughout Japan were tested. High incidences of anti-ATLV...
journal_title:International journal of cancer
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更新日期:1999-02-09 00:00:00
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journal_title:International journal of cancer
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doi:10.1002/ijc.10377
更新日期:2002-05-20 00:00:00
abstract::Parathyroid hormone-related protein (PTHrP) is a causative factor of humoral hypercalcemia in malignancy. However, it is difficult to explain the mechanism of anorexia/cachexia with PTHrP secretion in detail. Previously, we demonstrated that the expressions of orexigenic peptides increased and anorexigenic peptides de...
journal_title:International journal of cancer
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更新日期:2011-05-01 00:00:00
abstract::EBNA-positive lymphoblast cells were detected in 0.1 to 0.9% of the T-cell-depleted lymphocytes obtained from peripheral blood samples of five patients with infectious mononucleosis (IM). The same blood specimens from four of the five patients contained cells that formed EBNA-positive colonies in soft agar containing ...
journal_title:International journal of cancer
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doi:10.1002/ijc.2910230603
更新日期:1979-06-15 00:00:00
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journal_title:International journal of cancer
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abstract::Glioblastoma multiforme (GBM) is the most lethal brain malignancy which involves multi-gene abnormality. Unfortunately, effective therapy against GBM remains lacking. Previously, we found that NRP-1 and its downstream NRP-1/GIPC1 pathway played an important role in GBM. In our study, we further investigated the upstre...
journal_title:International journal of cancer
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abstract::Animal and experimental data suggest that anti-Müllerian hormone (AMH) serves as a marker of ovarian reserve and inhibits the growth of ovarian tumors. However, few epidemiologic studies have examined the association between AMH and ovarian cancer risk. We conducted a nested case-control study of 302 ovarian cancer ca...
journal_title:International journal of cancer
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abstract::The kinetics of the immune response of hamsters transplanted with virus-free SV40 tumor cells (TSV5) to two SV40-coded non-structural proteins of 94,000 daltons (T antigen) and 17,000 daltons (t antigen) was studied in order to determine if the variation in the immune reactivity of serum from tumor-bearing animals tow...
journal_title:International journal of cancer
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abstract::Very recently, BRAF mutations were found in about 2/3 of malignant melanomas and at lower frequencies in other human cancers. The BRAF gene codes for a protein in the mitogen-activated protein kinase (MAPK) pathway. All mutations identified to date are within the kinase domain, with a single missense mutation (V599E) ...
journal_title:International journal of cancer
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更新日期:2003-08-10 00:00:00
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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journal_title:International journal of cancer
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doi:10.1002/ijc.2910480510
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abstract::Lethally X-irradiated LEW rats reconstituted with syngeneic bone marrow and given low-dose Cyclosporine A (CyA) for 5 weeks develop, after withdrawal of CyA, symptoms of disease resembling graft-vs.-host disease (GVHD) as seen after allogeneic bone-marrow transplantation. Symptoms of disease may include acute dermatit...
journal_title:International journal of cancer
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abstract::Human oocytes in different stages of maturation were obtained by follicular aspiration from women given Clomovid and Gonadex. Particles similar to type-C virus were observed in three out of 16 oocytes. The particles were irregularly distributed along the oocyte membrane. They were seen both in a state of budding and l...
journal_title:International journal of cancer
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journal_title:International journal of cancer
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abstract::The coincubation of liposomes with mouse leukemia cells or fibroblasts can cause a wide of effects on their viability. These effects are not particular specific in terms of destroying the leukemic cells. However, it was observed that the combination of phosphorylcholine-cholesterol (PC-CHOL)1-liposomes, which are not ...
journal_title:International journal of cancer
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abstract::The peripheral blood monocyte is the reactive cell in the tube LAI assay. The monocyte loses its properties of adherence to glass upon exposure to specific antigen. Two different experiments to determine if lymphocytes, when they reacted with tumour, released mediators that were responsible for inhibiting monocyte gla...
journal_title:International journal of cancer
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journal_title:International journal of cancer
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更新日期:1996-06-21 00:00:00