Alexander Vilkin

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We have identified an alternative pathway of tumorigenesis in sporadic colon cancer, involving microsatellite instability due to mismatched repair methylation, which may be driven by mutations in the BRAF gene (V600E). Colorectal cancer (CRC) is the most common cancer in the world, and African Americans show a higher incidence than other populations in the(More)
Mucin is a high molecular weight glycoprotein that plays an important role in protecting the gallbladder epithelium from the detergent effect of bile. However, it also participates in gallstone formation. There is little information about a possible relationship between gallbladder inflammation and mucin expression or gallbladder stones' characteristics.(More)
The glucose regulated heat shock protein 78 (GRP78) is a central regulator of ER (endoplasmic reticulum) stress due to its pro-survival property. Up regulated GRP78 expression in tumor cells has been correlated with aggressive malignancies whereas some reports have predicted an improved prognosis. Over-expression of GRP78 in the ER promotes its localization(More)
BACKGROUND The identification of new biomarkers is required for early diagnosis of colorectal carcinoma patients (CRC), since about 20% of these patients are initially diagnosed with a distant metastatic disease. GRP78, a heat shock protein, functions also as a cell surface signaling receptor of cells under physiological stress. GRP78 was found to be(More)
The position paper recommends specific guidelines for surveillance of patients with atrophic gastritis, gastric intestinal metaplasia and dysplasia. Although gastric atrophy and intestinal metaplasia are recognized as premalignant conditions, there is insufficient data to recommend routine endoscopic surveillance. However, when endoscopy is performed, it(More)
AIM To investigate the pattern of mucin expression and concentration in bile obtained during endoscopic retrograde cholangiography (ERC) in relation to gallstone disease. METHODS Bile samples obtained at ERC from 29 consecutive patients, 17 with and 12 without gallstone disease were evaluated for mucin content by gel filtration on a Sepharose CL-4B(More)
BACKGROUND Patients infected by Helicobacter pylori who have first-degree relatives with gastric cancer have an 8-fold increased risk of developing gastric cancer themselves. Mucins are high-molecular-weight glycoproteins that play a cardinal role in the protective mechanism of the gastric epithelium. AIM To study gastric acid and mucin secretion in(More)
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