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    Helicobacter pylori in bronchiectasis: A polymerase chain reaction assay in bronchoalveolar lavage fluid and bronchiectatic lung tissue
    (Elsevier Science Inc, 2007) Gülhan, Meral; Özyılmaz, Ezgi; Tarhan, Gülnur; Demirag, Funda; Capan, Nermin; Ertürk, Arzu; Ahmed, Kamruddin
    Background. A number of studies have implicated an association between H. pylori and diverse extra-gastroduodenal pathologies. Chronic inflammation and increased immune response have been observed in bronchiectasis, likely gastroduodenal inflammatory diseases. H. pylori has been found in the trachea-bronchial aspirates of mechanically ventilated patients. Furthermore, the seroprevalence of H. pylori was found to be significantly higher in patients with bronchiectasis than in the control group. The present study was performed to investigate the possible role of H. pylori in the pathogenesis of bronchiectasis. Methods. Prospectively, bronchoalveolar lavage fluid (BALF) was obtained from patients with bronchiectasis (n = 26) and control (n = 20). BALF was subjected to polymerase chain reaction (PCR) to determine the presence of H. pylori and serum IgG against H. pylori was determined with micro-ELISA kit. In addition, PCR was performed to determine H. pylori in surgically removed lung tissues from patients with bronchiectasis (n = 97). Results. H. pylori DNA was not detected in the BALF or in lung tissue samples. In addition, anti-H. pylori IgG level in patients with bronchiectasis did not show statistically significant difference from that of the control. Conclusions. Our study provided evidence that there might be no direct association between H. pylori and bronchiectasis; however, the indirect role of soluble products of H. pylori could not be excluded. (C) 2007 IMSS. Published by Elsevier Inc.
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    The role of CD14 gene promoter polymorphism in tuberculosis
    (Academic Press Ltd- Elsevier Science Ltd, 2011) Ayaslioglu, Ergin; Kalpaklioglu, Fusun; Kavut, Ayse Bascioglu; Erturk, Arzu; Capan, Nermin
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    The role of CD14 gene promoter polymorphism in tuberculosis susceptibility
    (Elsevier Taiwan, 2013) Ayaslioglu, Ergin; Kalpaklioglu, Fusun; Kavut, Ayse Baccioglu; Erturk, Arzu; Capan, Nermin; Birben, Esra
    Background: CD14 is expressed principally by cells of monocyte/macrophage lineage and plays a pivotal role in the innate immunity to intracellular infections. Recent research findings have revealed an association between the CD14 gene promoter polymorphism and several major infectious diseases. Objective: The aim of the present study was to investigate the association between the CD14-159C/T polymorphism and tuberculosis in a Turkish population. Methods: For this purpose, 88 consecutive patients with tuberculosis (63 pulmonary, 25 extra-pulmonary) and 116 control subjects were enrolled into a prospective study. We determined CD14-159 genotypes by polymerase chain reaction - restriction fragment length polymorphism analysis and also measured serum concentrations of soluble CD14 (sCD14) by using a quantitative sandwich enzyme immunoassay technique. Results: There was no significant difference in terms of genotype distribution between patients with tuberculosis (CC 18.2%, CT 48.9%, TT 33.0%) and controls (CC 12.9%, CT 50.9%, TT 36.2%) or between patients with pulmonary and extrapulmonary tuberculosis. Serum levels of sCD14 were significantly increased in patients with active tuberculosis compared to those with inactive tuberculosis and healthy controls (p < 0.001). However, levels of sCD14 were not associated with any genotypes of CD14-159. Conclusion: The genotyping findings of the present study do not support a role for the CD14-159C/T polymorphism in the development of tuberculosis, at least in the geographical region of central Anatolia. Significantly elevated serum sCD14 levels in patients with active disease reflect the importance of the mononuclear phagocytic system activation in tuberculosis. Copyright (C) 2012, Taiwan Society of Microbiology. Published by Elsevier Taiwan LLC. All rights reserved.