proteinase/kanser

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Changes of proteases and proteinase inhibitors in androgen-dependent advanced prostate cancer patients with alpha2-macroglobulin deficiency.

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BACKGROUND It is thought that the quantitative imbalance between proteases and their inhibitors is a causative factor in invasion and metastasis of cancer cells. We previously reported on a number of androgen-dependent advanced prostate cancer (PCa) patients in which serum alpha2-macroglobulin

On the prevention of haematogenous tumor metastases rats. The role of the proteinase inhibitor "Trasylol".

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All malignant tumors shed cells into the circulation. The number of circulating tumor cells bears no relation to the extent of secondary growth. This is determined by the number of tumor cells that cross the vessel wall and implant in extravascular sites. The rate of cellular emigration is regulated

Tumor cell-platelet aggregation: induced by cathepsin B-like proteinase and inhibited by prostacyclin.

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The ability of tumor cells to metastasize may be related to their ability to promote aggregation of host platelets. The use of inhibitors of cysteine proteinases resulted in parallel inhibition of B16 amelanotic melanoma-induced platelet aggregation and of a cathepsin B activity. The antimetastatic

Inhibition of proteinase-like peptidase activities in serum and tissue from breast cancer patients.

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The inhibitory profiles of several proteinase-like peptidases active on synthetic peptide (MCA) substrates, present in sera and 100,000g supernatants of malignant tissue from patients with breast cancer, have been studied using a series of known inhibitors including epoxysuccinyl peptides (E-64,

[Activity of cytoplasmic proteinases from rat liver in Heren's carcinoma during tumor growth and treatment with medicinal herbs].

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The dynamics of the acid and neutral proteinases general enzymes activity change in the hepatocytes postnuclear fraction in the rats suffering from the Heren's carcinoma was investigated. It was determined that in the tumor development of the enzyme activity level of both the acid and neutral

Isolation and characterization of a cDNA that encodes a novel proteinase inhibitor I from a tobacco genetic tumor.

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We have isolated a cDNA clone, designated GTI, by screening a tobacco genetic tumor cDNA library with a tumor-specific "subtracted" cDNA probe. The cDNA contained the entire coding sequence for a 94-amino-acid polypeptide that exhibited significant homology to members of the proteinase inhibitor I

A novel aspartyl proteinase from apocrine epithelia and breast tumors.

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GCDFP-15 (gross cystic disease fluid protein, 15 kDa) is a secretory marker of apocrine differentiation in breast carcinoma. In human breast cancer cell lines, gene expression is regulated by hormones, including androgens and prolactin. The protein is also known under different names in different

Glycosylation of alpha-1-proteinase inhibitor and haptoglobin in ovarian cancer: evidence for two different mechanisms.

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The change in glycosylation of the two acute-phase proteins, alpha-1-proteinase inhibitor (API) and haptoglobin (Hp), in progressive ovarian cancer is different. This has been shown by monosaccharide analysis and lectin-binding studies of proteins purified from serum. In the glycan chains of API,

Serum alpha-1-proteinase inhibitor with abnormal properties in ovarian cancer.

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It was previously reported that sera from ovarian cancer patients contained abnormal forms of alpha-1-proteinase inhibitor (API) that predicted unresponsiveness to chemotherapy. These molecules were detected by extracting the sera with the fucose-specific lectin, lotus tetragonolobus, and analysing

Decreased branching, increased fucosylation and changed sialylation of alpha-1-proteinase inhibitor in breast and ovarian cancer.

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Proteolytic enzymes could be very important in spread of cancer, but the role of the body's natural inhibitors of these enzymes in this process is unknown. One such inhibitor is the serum glycoprotein, alpha-1-proteinase inhibitor (API). In previous studies we showed that the fucose-specific lectin,

Anesthetic agents modify tissue proteinase inhibitor content and tumor behavior.

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Anesthetic agents may modify the tissue content of low molecular weight proteinase inhibitors (mol wt less than 50,000) and affect the colonization and proliferation of B16-F10 melanoma cells in lungs. Lungs of female mice exposed to halothane in oxygen had significantly greater low molecular weight

Photodynamic therapy combined with a cysteine proteinase inhibitor synergistically decrease VEGF production and promote tumour necrosis in a rat mammary carcinoma.

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OBJECTIVE Photodynamic therapy (PDT) and inhibition of cathepsin B proteases by cystatin (cysteine proteinase inhibitor, CPI) are potential new tumour treatment modalities. We have investigated the efficacy of PDT and CPI alone and in combination on a solid mammary carcinoma transplanted into Wistar

Primary tumor growth and formation of spontaneous lung metastases in mice bearing Lewis carcinoma treated with proteinase inhibitors.

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The differential effects on primary tumor growth and on the formation of spontaneous pulmonary metastases have been determined for a series of proteinase inhibitors. The substances included the gold compounds, aurothioglucose and aurothiomalate, D(-)penicillamine, phosphoramidon and an egg-white

Proteinases and proteinase inhibition by cytotoxic and antimetastatic drugs in transplantable solid metastasizing tumors in mice.

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The tissue levels of two proteolytic enzymes, plasminogen activator and cathepsin B - like cysteine proteinase, which were found to be increased in malignant tumors and to be proportional to tumor metastatic potential in some instances, have been determined in a panel of solid metastasizing tumors

Are proteinase inhibitors potentially useful in tumor therapy?

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Within the last 15 years a vast literature has arisen, which associates increased levels of proteinase activity with most in vitro transformed malignant cells and many tumor cells in vivo. As a consequence, proteinase inhibitors have been widely proposed as potential candidates for therapeutic use.

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