head and neck neoplasms/protease

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Collagenase and protease activities in head and neck tumors.

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An analysis of specimens of 43 head and neck tumors revealed that collagenase and protease activities paralleled each other and varied according to the anatomic site; highest activities were in tongues and tonsils, which are known to have low five-year survival rates. The greatest differences in

Human papillomavirus infection in head and neck cancer: the role of the secretory leukocyte protease inhibitor.

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We previously showed that secretory leukocyte protease inhibitor (SLPI) gene and protein expression is significantly lower in metastatic versus non-metastatic head and neck squamous cell carcinoma (HNSCC). However, we did not assess the human papillomavirus (HPV) status of these cases. Since SLPI

Salivary secretory leukocyte protease inhibitor (SLPI) and head and neck cancer: The Cancer Prevention Study II Nutrition Cohort.

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OBJECTIVE Secretory leukocyte protease inhibitor (SLPI) is an innate-immunity protein displaying antimicrobial and anti-inflammatory properties that is found in high concentrations in saliva. The role of extracellular salivary SLPI in head and neck squamous cell carcinoma (HNSCC) remains unclear.

TMPRSS2, a SARS-CoV-2 internalization protease is downregulated in head and neck cancer patients

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Background: SARS-coronavirus-2 enters host cells through binding of the Spike protein to ACE2 receptor and subsequent S priming by the TMPRSS2 protease. We aim to assess differences in both ACE2 and TMPRSS2 expression in normal tissues

Lysosomal proteases cathepsins D, B, H, L and their inhibitors stefins A and B in head and neck cancer.

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In cytosols of tumour and normal tissue of 53 patients suffering from head and neck carcinoma cathepsins D, B, H and L were measured using quantitative immunoreactive assays (ELISA). The values of cathepsins D, B and L were significantly higher in tumour tissue, whereas cathepsin H concentration was

Effect of reoxygenation on the hypoxia-induced up-regulation of serine protease inhibitor PAI-1 in head and neck cancer cells.

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In squamous cell carcinoma of the head and neck (SCCHN), hypoxia is considered a crucial physiological modulator for malignant progression, wherebythe plasminogen activation system is involved in overlapping functions such as moulding of the extracellular matrix, cell proliferation and signal

Remote ischemic preconditioning does not influence lectin pathway protein levels in head and neck cancer patients undergoing surgery.

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Cancer patients who undergo tumor removal, and reconstructive surgery by transfer of a free tissue flap, are at high risk of surgical site infection and ischemia-reperfusion injury. Complement activation through the lectin pathway (LP) may contribute to ischemia-reperfusion injury.

Soluble interleukin-2 receptor and metalloproteinase-9 expression in head and neck cancer: prognostic value and analysis of their relationships.

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In a series of 84 head and neck patients, a statistically significant correlation was observed between high serum soluble interleukin (IL)-2 receptor alpha (sIL-2Ralpha) (P = 0.034) and metalloproteinase-9 (MMP-9) concentrations (P = 0.036) at diagnosis and a shorter survival of these patients. As

[Blood concentration of laminin gamma2 chain in patients with head and neck cancer].

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Laminin gamma2 chain (LN gamma2), expressed in human cancer cells and correlated with cancer malignancy, is cleaved by proteases and secreted into circulation. We measured the blood concentration of LN gamma2 in patients with head and neck cancer by an immuno-fluorescence assay using monoclonal

Salivary concentration of secretory leukocyte protease inhibitor, an antimicrobial protein, is decreased with advanced age.

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BACKGROUND Secretory leukocyte protease inhibitor (SLPI) exhibits antimicrobial activities that, in addition to other well-characterized proteins such as lysozyme and lactoferrin, is thought to play a critical role in mucosal defenses. Although elderly individuals are particularly susceptible to

Development of Bowman-Birk inhibitor for chemoprevention of oral head and neck cancer.

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Leukoplakia in the oral cavity has been used as a putative surrogate marker of head and neck cancer development. A class of chemoprevention compounds, called protease inhibitors, has been shown in vitro and in animal models to effectively suppress premalignant lesions. Bowman-Birk inhibitor (BBI) is

CIITA versus IFN-gamma induced MHC class II expression in head and neck cancer cells.

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A growing body of evidence suggests that optimal induction of systemic anti-tumor immunity requires priming of both the CD4+ and CD8+ T cells that are specific for tumor-associated antigens (TAA). Recently, it was shown that MHC class II positive tumor cells are able to induce tumor-specific CD4+ T

Laminin-derived peptide AG73 regulates migration, invasion, and protease activity of human oral squamous cell carcinoma cells through syndecan-1 and beta1 integrin.

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Squamous cell carcinoma is a prevalent head and neck tumor with high mortality. We studied the role played by laminin alpha1 chain peptide AG73 on migration, invasion, and protease activity of cells (OSCC) from human oral squamous cell carcinoma. Immunohistochemistry and immunofluorescence analyzed

A positive feedback loop between HER2 and ADAM12 in human head and neck cancer cells increases migration and invasion.

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Increased activation of epidermal growth factor receptor (EGFR) family members such as HER2/Erbb2 can result in more aggressive disease, resistance to chemotherapy and reduced survival of head and neck squamous cell carcinoma (HNSCC) patients. In order to identify mechanisms through which these

Disease-relevant signalling-pathways in head and neck cancer: Taspase1's proteolytic activity fine-tunes TFIIA function.

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Head and neck cancer (HNC) is the seventh most common malignancy in the world and its prevailing form, the head and neck squamous cell carcinoma (HNSCC), is characterized as aggressive and invasive cancer type. The transcription factor II A (TFIIA), initially described as general regulator of RNA

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