brain neoplasms/protease

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Detection of cathepsin S cysteine protease in human brain tumour microdialysates in vivo.

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Microdialysis enables the chemistry of extracellular fluid in body tissues to be measured. Extracellular proteases such as the cysteine protease, cathepsin S (CatS), are thought to facilitate astrocytoma invasion. Microdialysates obtained from human brain tumours in vivo were subjected to cathepsin

Activity of cysteine protease inhibitors in human brain tumors.

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BACKGROUND Cysteine proteases (mainly cathepsins B and L) are thought to play an important role in the progress of cancer, including brain tumors. Together with other proteases, they hydrolyze the extracellular matrix and basement membrane proteins, thus enabling the tumor to grow and spread.

Serpin inhibitors of urokinase and thrombin in normal rat brain and the 9L brain tumor: evidence for elevated expression of protease nexin I-like inhibitor and a novel sodium dodecyl sulfate-activated tumor antithrombin.

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Increasing attention is being paid to alterations of the hemostatic balance in tumors, in general, and brain tumors, in particular. Apparently divergent results, showing excess fibrinolysis (i.e., increased plasminogen activator activity) or its inhibition (i.e., increased inhibitor activity), have

Activities, localizations, and roles of serine proteases and their inhibitors in human brain tumor progression.

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The plasminogen activation system consists of plasminogen activators and their inhibitors, serine proteases, and serpins. The proteases and inhibitors regulate a variety of processes in tissue morphogenesis, differentiation, cell migration, and cancer cell invasiveness and metastasis. One of the

Proteases and their inhibitors in human brain tumours: a review.

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Proteases such as matrix metalloproteinases (MMPs), cysteine- and serine-proteinases are capable of degrading extracellular matrix and basement membranes and have been implicated in human brain tumours. MMPs are a homologous family of zinc-dependent proteases. Within this group, attention has been

Expression of ADAMTS-8, a secreted protease with antiangiogenic properties, is downregulated in brain tumours.

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Angiogenesis and extracellular matrix degradation are key events in tumour progression, and factors regulating stromal-epithelial interactions and matrix composition are potential targets for the development of novel anti-invasive/antiangiogenic therapies. Here, we examine the expression of

A pharmacologic inhibitor of the protease Taspase1 effectively inhibits breast and brain tumor growth.

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The threonine endopeptidase Taspase1 has a critical role in cancer cell proliferation and apoptosis. In this study, we developed and evaluated small molecule inhibitors of Taspase1 as a new candidate class of therapeutic modalities. Genetic deletion of Taspase1 in the mouse produced no overt

Proteases in brain tumour progression.

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Local invasion of tumour cells is characteristic of brain tumour progression. It is associated with increased motility and a potential to hydrolyse macromolecular components of the extracellular matrix. The peptidases that have been most investigated, and are induced during this process, are

The role of intracellular proteases in brain tumor.

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Ubiquitin-specific protease 4 promotes glioblastoma multiforme via activating ERK pathway.

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Glioblastoma multiforme (GBM) is one of the most common brain tumors in adults. Current treatments cannot increase survival to a large extent, as the glioblastoma development mechanisms remain unknown. It has been well documented that ubiquitination contributes to tumor initiation

Anosmin-1 contributes to brain tumor malignancy through integrin signal pathways.

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Anosmin-1, encoded by the KAL1 gene, is an extracellular matrix (ECM)-associated protein which plays essential roles in the establishment of olfactory and GNRH neurons during early brain development. Loss-of-function mutations of KAL1 results in Kallmann syndrome with delayed puberty and anosmia.

Immunohistochemical demonstration of bikunin, a light chain of inter-alpha-trypsin inhibitor, in human brain tumors.

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The presence and localization of bikunin (HI-30, or acid-stable protease inhibitor), a light chain of inter-alpha-trypsin inhibitor, was examined in 30 brain tumors employing immunohistochemical methods. The brain tumors involved 13 kinds of histological diagnosis. Bikunin immunoreactivity was

ADAM23 methylation and expression analysis in brain tumors.

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The ADAMs comprises a family of cell surface proteins with putative roles in cell-cell and/or cell-matrix interactions and in protease activities. In this work, we have examined the expression level and the methylation status of the 5' upstream region of the adhesion molecule ADAM23 in two brain

Cathepsin B and its inhibitor stefin A in brain tumors.

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Cysteine protease cathepsin B (CatB) and its endogenous inhibitor stefin A (StA) play an important role in tumor progression. Increase of CatB expression and lower levels of its inhibitors were associated with tumor malignancy in brain tumors. In this study of 100 patients, CatB was localized by

Expression of cysteine protease inhibitors in human gliomas and meningiomas.

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Increased levels of human cysteine proteases have been implicated in the progression of tumors from the premalignant to the malignant state. The physiological activities of these proteases are regulated by their interactions with specific inhibitors. To our knowledge there have been no previous

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