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  • 1
    ISSN: 1436-2813
    Keywords: Key Words: Plummer-Vinson syndrome ; gastric cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1436-2813
    Keywords: Plummer-Vinson syndrome ; gastric cancer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We report herein the unusual case of a 59-year-old woman with Plummer-Vinson syndrome who developed gastric cancer. The patient had a longstanding history of dysphagia and iron deficiency anemia, for which she has sporadically taken iron deficiency anemia, for which she had sporadically taken iron supplements that improved the dysphagia to some extent, but not completely. Owing to her tolerance of the dysphagia, she had not been taking iron supplements for the past 17 years. On admission, she was in fair nutritional condition and not anemic. Blood chemistry results were all normal, including the serum iron level. Gastrointestinal radiographic series demonstrated cervical esophageal webs and advanced gastric cancer. Her dysphagia was successfully treated by endoscopic bougienage through the webs, and a distal partial gastrectomy with nodal dissection was performed. Histology of the resected stomach revealed atrophic mucosal change and, by chance, an adenomatous lesion in addition to adenocarcinoma. Her postoperative course was uneventful and she is now well, without any signs of recurrence. Although Plummer-Vinson syndrome is known to be associated with upper alimentary tract cancers, gastric cancer is extremely rare. A discussion on the etiology of Plummer-Vinson syndrome and its link with potential carcinogenesis follows this case report.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1435-5922
    Keywords: Key words: gallbladder cancer ; anomalous junction of the pancreaticobiliary duct ; cytokine ; obstructive jaundice ; carcinogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract: We report a case of anomalous junction of the pan creaticobiliary duct (AJPBD) associated with gallbladder cancer and obstructive jaundice in a patient with high serum and bile cytokine levels. The patient was a 63-year-old woman who complained of right hypochondralgia. Ultrasound, computed tomography, percutaneous transhepatic cholangiography, and endoscopic retrograde cholangio-pancreatatography revealed dilation of the bile ducts, an elevated lesion of the gallbladder, and AJPBD. She underwent percutaneous transhepatic cholangio-drainage (PTCD) for obstructive jaundice. However, the total bilirubin concentration remained high 7 days after PTCD. Her serum interleukin 6 level was 57 359 pg/ml before PTCD, and gradually decreased to 10 pg/ml after PTCD. Bile interleukin 6 level was 10 pg/ml before PTCD, 8997 pg/ml 3 h after PTCD and gradually decreased there after. Serum and bile levels of tumor necrosis factor α and hepatocyte growth factor were high before and after PTCD. The patient underwent an extended cholecystectomy and resection of the extrahepatic bile duct. The resected specimen showed two elevated lesions of the gallbladder which, microscopically, revealed moderately differentiated tubular adenocarcinoma. These findings suggest that pre-existing inconspicuous inflammation of the biliary tract due to reflux of pancreatic juice is involved in elevation of serum and bile cytokines, and that cytokines may participate in gallbladder carcinogenesis associated with AJPBD.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1617-4623
    Keywords: RGD sequence ; Protein-primed DNA replication
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Primer protein (PP) of bacteriophages M2 and ϕ29 contains an Arg-Gly-Asp (RGD) sequence. The RGD-mediated protein-protein interaction in protein-primed DNA replication of M2 was studied in vitro using three purified and indispensable components: PP, DNA polymerase (POL) and template DNA linked to terminal protein (TP). PP competed with a synthetic RGD peptide for binding to the template DNA-TP complex (TP-DNA). In addition, POL bound to template TP-DNA only when complexed with PP. These results indicate that the RGD sequence of PP is responsible for the interaction of the PP-POL complex with TP-DNA, which contains the initiation site for the protein priming of DNA synthesis. At the moment when PP converts to TP upon linking the first deoxynucleotide, a conformational change results in exposure of the RGD binding site.
    Type of Medium: Electronic Resource
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