thyroid neoplasms/protease

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Interspecies differences in membrane-associated protease activities of thyrocytes and their relevance for thyroid cancer studies.

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BACKGROUND To understand the role of proteases involved in human thyroid cancer progression and tissue invasion, thyrocytes from other species could potentially be used provided their characteristics are similar. It is not known whether dipeptidyl peptidase IV and aminopeptidase N activities, which

Invasion by cultured human follicular thyroid cancer correlates with increased beta 1 integrins and production of proteases.

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A recognized model of tumor invasion requires cells to adhere to epithelial basement membrane and extracellular matrix components triggering release of proteases thus allowing cancer cells to invade the substrate. This adhesion is mediated by beta 1 integrins, a family of receptors to substrates

Transmembrane protease serine 4 promotes thyroid cancer proliferation via CREB phosphorylation.

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BACKGROUND Transmembrane protease serine 4 (TMPRSS4), one of the type II transmembrane serine proteases (TTSPs), is elevated in various cancers and is associated with multiple malignant phenotypes. However, the expression pattern and biologic significance of TMPRSS4 in thyroid cancer are largely

The HIV protease inhibitor nelfinavir down-regulates RET signaling and induces apoptosis in medullary thyroid cancer cells.

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BACKGROUND Mutations of RET tyrosine kinase are associated with the development of medullary thyroid cancer (MTC). The heat shock protein (HSP) 90 chaperone is required for folding and stability of RET mutants. HSP90 is a molecular target for the HIV protease inhibitor nelfinavir (NFV). OBJECTIVE We

Elevated Concentrations of SERPINE2/Protease Nexin-1 and Secretory Leukocyte Protease Inhibitor in the Serum of Patients with Papillary Thyroid Cancer.

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Introduction. SERPINE2 and secretory leukocyte protease inhibitor (SLPI) are proteins with anticoagulant properties which could promote solid tumor growth. However, their role in the pathogenesis of thyroid cancer has not been determined. Materials and Methods. The aim of this study was to assess

Changes in expression of human serine protease HtrA1, HtrA2 and HtrA3 genes in benign and malignant thyroid tumors.

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Human HtrA proteins are serine proteases involved in essential physiological processes. HtrA1 and HtrA3 function as tumor suppressors and inhibitors of the TGF-β signaling pathway. HtrA2 regulates mitochondrial homeostasis and plays a pivotal role in the induction of apoptosis. The aim of the study

Silencing of the maspin gene by promoter hypermethylation in thyroid cancer.

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Maspin (mammary serpin) is a serine protease inhibitor member of the serpin family and a class II tumor suppressor, whose expression is lost in many advanced cancers. Maspin has been shown to inhibit cell motility, invasion, and metastasis; however, its precise role still remains to be verified.

Relationship of gangliosides to the structure and function of thyrotropin receptors: their absence on plasma membranes of a thyroid tumor defective in thyrotropin receptor activity.

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Plasma membranes derived from rat thyroid tumor (1-8R) which is unresponsive to thyrotropin but is responsive to dibutyryl adenosine 3':5'-cyclic monophosphate bind less than 20% of the [125I] thyrotropin which can be bound to plasma membranes from normal rat thyroids under conditions which optimize

Diagnostic and extent of disease multigene assay for malignant thyroid neoplasms.

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BACKGROUND Approximately 30% of fine-needle aspiration (FNA) biopsies of thyroid nodules are indeterminate, nondiagnostic, or suspicious. The purpose of the current study was to determine the accuracy of novel candidate diagnostic markers to distinguish benign from malignant thyroid neoplasms, and

Expression of serine peptidase inhibitor Kunitz type 1 in differentiated thyroid cancer.

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SPINT1, also known as HAI-1, is a Kunitz-type serine protease inhibitor that inhibits multiple proteases including hepatocyte growth factor (HGF) activator and matriptase. SPINT1 has been shown to modulate HGF/MET activation in certain cancer types. In the present study, we analyzed microarray

Pleiotropic effects of thyroid stimulating hormone in a differentiated thyroid cancer cell line. Studies on proliferation, thyroglobulin secretion, adhesion, migration and invasion.

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Thyroid stimulating hormone (TSH) causes differentiation and epidermal growth factor (EGF) causes dedifferentiation of thyroid cells in vitro. In undifferentiated thyroid cancer cell lines, TSH stimulates tumor cell migration and invasion, a dedifferentiated function, presumably due to an escape of

Gene expression profile of epithelial-mesenchymal transition mediators in papillary thyroid cancer

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Purpose: Platelet derived growth receptor alpha (PDGFRA) promotes the epithelial-mesenchymal transition (EMT) in thyroid follicular cells and is linked to lymphatic metastases in papillary thyroid cancer (PTC). We probed the regulatory

[Preliminary approach towards construction of peptide libraries as potential tools for diagnosis of malignant thyroid tumors].

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BACKGROUND Cancer of thyroid gland is the most common malignancy of the endocrine system. The treatment improvement could be achieved by early diagnosis. The aim of the study was to identify cancer specific antigenes with use of peptide libraries. METHODS The material from 6 patients with thyroid

Nelfinavir inhibits proliferation and induces DNA damage in thyroid cancer cells.

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The HIV protease inhibitor Nelfinavir (NFV) inhibits PI3K/AKT and MAPK/ERK signaling pathways, emerging targets in thyroid cancers. We examined the effects of NFV on cancer cells that derived from follicular (FTC), papillary (PTC) and anaplastic (ATC) thyroid cancers. NFV (1-20 µM) was tested in

Differentiated thyroid cancer cell invasion is regulated through epidermal growth factor receptor-dependent activation of matrix metalloproteinase (MMP)-2/gelatinase A.

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Mechanisms of invasion in thyroid cancer remain poorly understood. We hypothesized that signaling via the epidermal growth factor receptor (EGFR) stimulates thyroid cancer cell invasion by altering the expression and cleavage of matrix metalloproteinases (MMPs). Papillary and follicular carcinoma

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