نتایج جستجو برای: gastric epithelial cells
تعداد نتایج: 1520855 فیلتر نتایج به سال:
Background and purpose: Angiogenesis provides proper nutrition and helps to the development and spread of cancer cells. Cancer stem cells are a rare population of tumor cells responsible for initiation, spreading and growth of cancer. Angiogenesis occurs more in cancer stem cells compared with other cancer cells. Ibuprofen, as a member of nonsteroidal anti-inflammatory drugs (NSAIDs) group is u...
IFN-g mediates responses to bacterial infection and autoimmune disease, but it is also an important tumor suppressor. It is upregulated in the gastric mucosa by chronic Helicobacter infection; however, whether it plays a positive or negative role in inflammation-associated gastric carcinogenesis is unexplored. To study this question, we generated an Hþ/Kþ-ATPase-IFN-g transgenic mouse that over...
The persistence of Helicobacter pylori in the human gastric mucosa implies that immune response fails to clear infection. We found H. compromises antigen presentation ability macrophages, because decline presenting molecules HLA-II. Here, we reveal main bacterial factor responsible for this effect is ADP-heptose, an intermediate metabolite biosynthetic pathway lipopolysaccharide (LPS) elicits a...
Two mouse urokinase-type plasminogen activator receptor (muPAR) cDNAs were isolated: muPAR1 is homologous to the human urokinase-type plasminogen activator receptor while muPAR2 codes for a 199 residue protein sharing the first 133 residues with muPAR1. Mouse genomic DNA sequencing indicates that the two different mRNAs arise by alternative splicing. In situ hybridization showed differential ex...
Helicobacter pylori and nonsteroidal anti-inflammatory drugs (NSAIDs) are two well-known important causative factors of gastric damage. While H. pylori increases apoptosis and the proliferation of gastric epithelial cells and is an important factor in peptic ulcer and gastric cancer, NSAIDs induce cell apoptosis and have antineoplastic effects. We investigated the effects of NSAIDs (a nonselect...
Persistent colonization of the gastric mucosa by Helicobacter pylori (Hp) elicits chronic inflammation and aberrant epithelial cell proliferation, which increases the risk of gastric cancer. Here we examine the ability of microRNAs to modulate gastric cell proliferation in response to persistent Hp infection and find that epigenetic silencing of miR-210 plays a key role in gastric disease progr...
The expression of a 60-kDa heat shock protein (HSP60) on the cell surface of Helicobacter pylori was analysed by flow cytometry with polyclonal antibody directed to HSP60. All 13 strains of H. pylori examined expressed HSP60 on the cell surface, although the intensity of expression was different among the strains and depended on culture conditions. There was a correlation between the intensity ...
The gastric epithelium is sustained by a population of stem cells that replenish the various mature epithelial lineages throughout adulthood. Regulation of stem and progenitor cell proliferation occurs via basic developmental signaling pathways, including the Notch pathway, which recently was described to promote gastric stem cell proliferation in both mice and human beings. Current cancer theo...
Previous studies of chimeric animals demonstrate that multipotential stem cells play a role in the development of the gastric epithelium; however, despite much effort, it is not clear whether they persist into adulthood. Here, chemical mutagenesis was used to label random epithelial cells by loss of transgene function in adult hemizygous ROSA26 mice, a mouse strain expressing the transgene lacZ...
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