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  • Hindawi Limited  (2)
  • 1
    In: Gastroenterology Research and Practice, Hindawi Limited, Vol. 2016 ( 2016), p. 1-5
    Abstract: Background . Persistent Helicobacter pylori infection may induce several upper gastrointestinal diseases. Two major virulence factors of H. pylori , vacuolating cytotoxin A (VacA) and cytotoxin-associated gene A (CagA), are thought to be associated with the severity of disease progression. The distribution of vacA and cag -pathogenicity island ( cag -PAI) alleles varies in H. pylori isolated from patients in different geographic regions. Aim . To assess the association between mixed infection of H. pylori clinical isolates from Taiwanese patients and the severity of gastrointestinal diseases. Methods . A total of 70 patients were enrolled in this study. Six distinct and well-separated colonies were isolated from each patient and 420 colonies were analyzed to determine the genotypes of virulence genes. Results . The prevalence of mixed infections of all H. pylori -infected patients was 28.6% (20/70). The rate of mixed infections in patients with duodenal ulcer (47.6%) was much higher than that with other gastrointestinal diseases ( P 〈 0.05 ). Conclusions . H. pylori mixed infections show high genetic diversity that may enhance bacterial adaptation to the hostile environment of the stomach and contribute to disease development.
    Type of Medium: Online Resource
    ISSN: 1687-6121 , 1687-630X
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2016
    detail.hit.zdb_id: 2435460-0
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  • 2
    Online Resource
    Online Resource
    Hindawi Limited ; 2013
    In:  The Scientific World Journal Vol. 2013 ( 2013), p. 1-6
    In: The Scientific World Journal, Hindawi Limited, Vol. 2013 ( 2013), p. 1-6
    Abstract: The purpose of this study was to develop and optimize an isotretinoin oil-based capsule with specific dissolution pattern. A three-factor-constrained mixture design was used to prepare the systemic model formulations. The independent factors were the components of oil-based capsule including beeswax ( X 1 ), hydrogenated coconut oil ( X 2 ), and soybean oil ( X 3 ). The drug release percentages at 10, 30, 60, and 90 min were selected as responses. The effect of formulation factors including that on responses was inspected by using response surface methodology (RSM). Multiple-response optimization was performed to search for the appropriate formulation with specific release pattern. It was found that the interaction effect of these formulation factors ( X 1 X 2 , X 1 X 3 , and X 2 X 3 ) showed more potential influence than that of the main factors ( X 1 , X 2 , and X 3 ). An optimal predicted formulation with Y 10  min , Y 30  min , Y 60  min , and Y 90  min release values of 12.3%, 36.7%, 73.6%, and 92.7% at X 1 , X 2 , and X 3 of 5.75, 15.37, and 78.88, respectively, was developed. The new formulation was prepared and performed by the dissolution test. The similarity factor f 2 was 54.8, indicating that the dissolution pattern of the new optimized formulation showed equivalence to the predicted profile.
    Type of Medium: Online Resource
    ISSN: 1537-744X
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2013
    detail.hit.zdb_id: 2075968-X
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