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proteinase inhibitor/sarkom
Veza se sprema u međuspremnik
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Cysteine proteinase inhibitor in the ascitic fluid of sarcoma 180 tumor-bearing mice is a low molecular weight kininogen. Partial NH2- and COOH-terminal sequences and susceptibility to various glandular kallikreins.
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It has been proposed that a cysteine proteinase inhibitor (CPI) found in the ascitic fluid of Sarcoma 180 tumor-bearing mice is a kind of kininogen (Itoh, N., Yokota, S., Takagishi, U., Hatta, A., and Okamaoto, H. (1987) Cancer Res. 47, 5560-5565). The first 40 NH2-terminal residues and 54 residues
Thiol proteinase inhibitor in the ascitic fluid of sarcoma 180 tumor-bearing mice.
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A thiol proteinase inhibitor (TPI) has been purified from the ascitic fluid of Sarcoma 180 tumor-bearing mice. The molecular weight of the inhibitor was estimated to be 67,000 on sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and the substance inhibited papain, cathepsins B and L, but
Inhibitory properties of low molecular mass cysteine proteinase inhibitors from human sarcoma.
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Elevated activities of cysteine proteinases such as cathepsins B and L and cancer procoagulant have been linked to tumor malignancy. In the present study we examined the hypothesis that these elevated activities could be due to impaired regulation by the endogenous low molecular mass cysteine
Localization of alpha 2-macroglobulin in human primary sarcomas and synthesis in established cell lines.
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The presence of alpha 2-macroglobulin (alpha 2M) was detected with the avidin-biotin technique in more than 20-yr-old paraffin blocks from human sarcomas. alpha 2M was found mainly in the cytoplasm of the tumor cells, and almost all tumor cells were positive. This serum glycoprotein, which is a
Cyclic AMP-dependent and -independent effects on tissue-type plasminogen activator activity in osteogenic sarcoma cells; evidence from phosphodiesterase inhibition and parathyroid hormone antagonists.
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The plasminogen activator (PA) in clonal osteogenic sarcoma cells of rat origin (UMR 106-01 and UMR 106-06) and in osteoblast-rich rat calvarial cells has been characterized using specific antibodies to be tissue-type PA (tPA). An Mr value of 75,000 by SDS-polyacrylamide gel electrophoresis and
Effect of proteinase inhibitor in experimental tumors.
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Aprotinin, a wide range proteinase inhibitor, was given alone to tumor-bearing mice and life span and several tumor growth parameters were recordered. Aprotinin showed anti-tumor effects in Hepatoma 22 and Lewis lung carcinoma, remaining ineffective in Sarcoma 37, Leukemia L1210 and Ehrlich ascitic
Antimetastatic activity of adriamycin in combinations with proteinase inhibitors in mice.
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The antimetastatic activity of adriamycin in combination with proteinase inhibitors was investigated in mice bearing the metastatic tumors L1210 leukemia, Lewis lung carcinoma or M5076 sarcoma. Leupeptin, a cathepsin B inhibitor, when administered as a single agent was devoid of antimetastatic
Transformation of rat liver cell line by Rous sarcoma virus causes loss of cell surface fibronectin, accompanied with secretion of metallo-proteinase that preferentially digests the fibronectin.
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An epithelial cell line derived from the liver of a normal Buffalo rat (BRL) was transformed by Rous sarcoma virus (RSV). The RSV-transformed cells were separated into five clones (RSV-BRL1 through 5), which were morphologically different. RSV-BRL cells exhibited the following characteristics
Effects of E-64 (cysteine-proteinase inhibitor) and pepstatin (aspartyl-proteinase inhibitor) on metastasis formation in mice with mammary and ovarian tumors.
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The effects of E-64 (Cathepsin B and L inhibitor) and Pepstatin A (Cathepsin D inhibitor) on spontaneous and experimental metastasis formation were investigated in mice with MCa mammary carcinoma, M5076 ovarian sarcoma and L1210 leukemia. Pepstatin induced a marked decrease in the number of
Enhanced vascular permeability in solid tumor involving peroxynitrite and matrix metalloproteinases.
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Peroxynitrite (ONOO(-)), which is generated from nitric oxide (NO) and superoxide anion (O(2)(.-)) under pathological conditions, plays an important role in pathophysiological processes. Activation of matrix metalloproteinases (MMPs) contributes to tumor angiogenesis and metastasis. NO mediates the
Regulation of plasminogen activator activity in human fibroblastic cells by fibrosarcoma cell-derived factors.
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Low-molecular-weight protein factors (Mr 8,000 to 18,000) from serum-free conditioned medium of human fibrosarcoma (8387) cells reversibly enhanced the secretion of proteinase-inhibitory activity by cultured normal human skin fibroblasts. This inhibitory activity could be absorbed by immobilized
Growth stimulation of 3T3 fibroblasts by cystatin.
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Treatment of cultures of mouse 3T3 fibroblasts with Cystatin C, a thiol-proteinase inhibitor isolated from chicken egg white, resulted in an enhanced rate of cell proliferation. This stimulation was demonstrated using two independent assay systems: (a) assessment of total cell number and (b)
Several murine metastasizing tumors possess a cysteine proteinase with cancer procoagulant characteristics.
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Cancer Procoagulant (CP), a cysteine proteinase which triggers blood coagulation by directly activating Factor X (FX) in the absence of Factor VII (F VII), has recently been isolated from rabbit V2 carcinoma and biochemically characterized. We have studied the procoagulant activity of tissue
Structural studies of the retroviral proteinase from avian myeloblastosis associated virus.
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The structure of the retroviral proteinase from avian myeloblastosis associated virus (MAV) has been determined and refined at 2.2 A resolution. This structure is compared with those of homologous proteinases from Rous sarcoma virus (RSV) and human immunodeficiency type 1 virus (HIV). Through
Entrapment and inhibition of human immunodeficiency virus proteinase by alpha 2-macroglobulin and structural changes in the inhibitor.
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The inhibitory effect of alpha 2-macroglobulin (alpha 2M), a major plasma proteinase inhibitor, on human immunodeficiency virus (HIV) proteinase was investigated. The activity of HIV proteinase toward the Moloney murine sarcoma virus-derived gag protein (a high-molecular-mass substrate) was found to
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