areca catechu/l tyrosine

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Ingredients contribute to variation in production of reactive oxygen species by areca quid.

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Areca quid (AQ) chewing has been implicated an independent risk factor for the development of oral cancer. Taiwanese areca quid (AQ) refers to a combination of areca nut (AN), lime, and inflorescence of Piper betle Linn. (IPB) or Piper betle leaf (PBL). Studies of AQ in other countries reported that

Hydroxyl radical formation and oxidative DNA damage induced by areca quid in vivo.

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Chewing areca quid (AQ) has been implicated as a major risk factor for the development of oral squamous-cell carcinoma (OSCC). Recent studies have suggested that AQ-generated reactive oxygen species (ROS) is one of the contributing factors for oral carcinogenesis. However, the AQ used in Taiwan is

EGFR protein overexpression and mutation in areca quid-associated oral cavity squamous cell carcinoma in Taiwan.

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BACKGROUND Epidermal growth factor receptor (EGFR)-targeted therapy has been extensively assessed in human cancer treatment. We appraised the possible role of tyrosine kinase inhibitors (TKIs) in areca quid (AQ)-associated oral cavity squamous cell carcinomas (OSCCs) by examining EGFR protein

Establishment and characterization of a tumorigenic cell line from areca quid and tobacco smoke-associated buccal carcinoma.

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A cell line, TW2.6, has been established from the surgically resected specimen of an untreated primary squamous cell carcinoma of the buccal mucosa from a 48-year-old man who was an areca quid chewer and tobacco smoker. TW2.6 cells exhibited morphological features of keratinocytes and replicated

Stimulation of MMP-9 of oral epithelial cells by areca nut extract is related to TGF-β/Smad2-dependent and -independent pathways and prevented by betel leaf extract, hydroxychavicol and melatonin.

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There are 200-600 million betel quid (BQ) chewers in the world. BQ increases oral cancer risk. Matrix metalloproteinase-9 (MMP-9) is responsible for matrix degradation, cancer invasion and metastasis. Whether areca nut extract (ANE), a BQ component, stimulates MMP-9 secretion, and the

β-catenin expression in areca quid chewing-associated oral squamous cell carcinomas and upregulated by arecoline in human oral epithelial cells.

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OBJECTIVE Nuclear localization of β-catenin is known to associate with malignant transformation of many squamous cell carcinomas. The aim of this study was to compare β-catenin expression in normal human oral epithelium and areca quid chewing associated oral squamous cell carcinomas (OSCCs) and

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