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Registros recuperados: 6
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Association among H. pylori virulence markers dupA, cagA and vacA in Brazilian patients J. Venom. Anim. Toxins incl. Trop. Dis.
Pereira,Weendelly Nayara; Ferraz,Mariane Avante; Zabaglia,Luanna Munhoz; Labio,Roger William de; Orcini,Wilson Aparecido; Ximenez,João Paulo Bianchi; Caleman Neto,Agostinho; Payão,Spencer Luiz Marques; Rasmussen,Lucas Trevizani.
Background:Only a few Helicobacter pylori-infected individuals develop severe gastric diseases and virulence factors of H. pyloriappear to be involved in such clinical outcomes. Duodenal ulcer promoting gene A (dupA) is a novel virulence factor ofHelicobacter pylori that is associated with duodenal ulcer development and reduced risk for gastric carcinoma in some populations. The aims of the present study were to determine the presence ofdupA gene and evaluate the association amongdupA and other virulence factors includingcagA and vacA in Brazilian patients. Gastric biopsies were obtained from 205 dyspeptic patients (100 children and 105 adults). DNA was extracted and analyzed for the presence of H. pylori and its virulence factors using the polymerase...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helicobacter pylori; DupA; CagA; VacA; Gastroduodenal diseases; PCR.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200319
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cagA positive Helicobacter pylori in Brazilian children related to chronic gastritis BJID
Gatti,Luciano Lobo; Lábio,Roger de; Silva,Luiz Carlos da; Smith,Marília de Arruda Cardoso; Payão,Spencer Luiz Marques.
Helicobacter pylori is a spiral-shaped Gram-negative bacterium. It colonizes the gastric mucosa of humans and persists for decades if not treated. Helicobacter pylori infection affects more than half of the world's population and invariably results in chronic gastritis. The cagA gene is present in about 60 to 70% of H. pylori strains; it encodes a high-molecular-weight protein (120 to 140 kDa) and several investigators have noted a correlation between strains that possess cagA and the severity of gastric mucosal inflammation. We examined the relation between cagA status in H. pylori strains and chronic gastritis with inflammatory processes in children from Marília, São Paulo, Brazil. One-hundred-twenty-one children were analyzed histopathologically and by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helicobacter pylori infection; CagA; Inflammatory infiltrate.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702006000400008
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Comparison of histological and molecular diagnosis of Helicobacter pylori in benign lesions and gastric adenocarcinoma BJM
César,Ana Cristina Gobbo; Cury,Patrícia Maluf; Payão,Spencer Luiz Marques; Liberatore,Paula Rahal; Silva,Ana Elizabete.
Helicobacter pylori colonization is associated with chronic gastritis, peptic ulcers, intestinal metaplasia, adenocarcinoma and lymphoma of the stomach. The objective of this study was to compare the results of the routinely used histology with molecular diagnosis for the detection of H. pylori. Eighty samples from gastric lesions (chronic gastritis, atrophic gastritis, gastric ulcer, and intestinal metaplasia), 18 gastric adenocarcinoma and 10 normal mucosa H. pylori-negative (control) samples were obtained. All samples were examined histologically (hematoxylin-eosin and Giemsa staining), and PCR amplifications of the species-specific antigen gene (H3H4) and urease A gene segment (H5H6) of H. pylori were made, using the human gene CYP1A1 for DNA quality...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helicobacter pylori; Gastric lesions; Adenocarcinoma; Histological diagnosis; PCR.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000100003
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Interleukin 8 (-251 T>A) polymorphism in children and teenagers infected with Helicobacter pylori J. Venom. Anim. Toxins incl. Trop. Dis.
Saes,Marina; Labio,Roger Willian de; Rasmussen,Lucas Trevizani; Payão,Spencer Luiz Marques.
Abstract Background Helicobacter pylori (H. pylori) is a gram-negative bacterium that colonizes the human stomach and causes a variety of gastric diseases. This study evaluated the correlations between the -251 (T>A) (rs4073) polymorphism of interleukin-8 (IL-8), the etiology of gastric disease, and H. pylori infection in pediatric and adolescent patients. Methods DNA samples were obtained from 285 gastric biopsies from pediatric patients. H. pylori was detected by PCR, whereas PCR-RFLP was used to characterize the -251 (T>A) polymorphism of IL-8. Results The histological analysis revealed the presence of gastritis in 158 patients (55.44%). H. pylori was found in 71 samples (24.9%). The -251 (T>A) polymorphism revealed that 58 (29.47%)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Helicobacter pylori Interleukin 8 Polymorphism -251 (T> A) Gastric disease.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992017000100601
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Interleukin-8-251T > a, interleukin-1α-889C > t and apolipoprotein e polymorphisms in Alzheimer's disease Genet. Mol. Biol.
Vendramini,Alex Augusto; Lábio,Roger Willian de; Rasmussen,Lucas Trevizani; Reis,Nathali Mattiuzo dos; Minett,Thais; Bertolucci,Paulo Henrique Ferreira; Pinhel,Marcela Augusta de Souza; Souza,Dorotéia Rossi Silva; Mazzotti,Diego Robles; Smith,Marília de Arruda Cardoso; Payão,Spencer Luiz Marques.
An inflammatory process has been involved in numerous neurodegenerative disorders such as Parkinson's disease, stroke and Alzheimer's disease (AD). In AD, the inflammatory response is mainly located in the vicinity of amyloid plaques. Cytokines, such as interleukin-8 (IL-8) and interleukin-1α (IL-1α), have been clearly involved in this inflammatory process. Polymorphisms of several interleukin genes have been correlated to the risk of developing AD. The present study investigated the association of AD with polymorphisms IL-8 -251T > A (rs4073) and IL-1α-889C > T (rs1800587) and the interactive effect of both, adjusted by the Apolipoprotein E genotype. 199 blood samples from patients with AD, 146 healthy elderly controls and 95 healthy young...
Tipo: Info:eu-repo/semantics/article Palavras-chave: IL-8; IL-1α; Alzheimer's Disease; APOE; Inflammatory response.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000100001
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Lack of association among TNF-α gene expression, -308 polymorphism (G > A) and virulence markers of Helicobacter pylori J. Venom. Anim. Toxins incl. Trop. Dis.
Zabaglia,Luanna Munhoz; Ferraz,Mariane Avante; Pereira,Weendelly Nayara; Orcini,Wilson Aparecido; Labio,Roger Willian de; Caleman Neto,Agostinho; Wisnieski,Fernanda; Oliveira,Juliana Garcia de; Smith,Marilia de Arruda Cardoso; Payão,Spencer Luiz Marques; Rasmussen,Lucas Trevizani.
Abstract Background Tumor necrosis factor plays a critical role in the pathogenesis of gastric diseases such as gastric cancer, and an abnormal inflammatory response has frequently been observed in dyspeptic patients. Helicobacter pylori infection can induce a gastric mucosal inflammatory response that may be influenced by -308 (G > A) polymorphisms and gene expression of theTNF-α gene. Methods One hundred and thirty-four gastric biopsy samples were collected from patients of both genders (61♂ and 73♀, mean age 40.3 ± 24.2 years) with gastric symptoms. The -308 (G > A) polymorphism of TNF-α was characterized using polymerase chain reaction (PCR) and restriction fragment length polymorphism (RFLP). The expression level was measured using real-time...
Tipo: Info:eu-repo/semantics/article Palavras-chave: H. pylori; TNF-α Gene expression; Gastric cancer cagA.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992015000100355
Registros recuperados: 6
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