Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김정목 | - |
dc.date.accessioned | 2018-04-16T02:52:23Z | - |
dc.date.available | 2018-04-16T02:52:23Z | - |
dc.date.issued | 2011-10 | - |
dc.identifier.citation | Clinical & Experimental Immunology. Vol.166, No.1 [2011], pp34-45 | en_US |
dc.identifier.issn | 0009-9104 | - |
dc.identifier.uri | http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2249.2011.04447.x/abstract? | - |
dc.identifier.uri | http://hdl.handle.net/20.500.11754/67613 | - |
dc.description.abstract | Helicobacter pylori induces an infiltration of dendritic cells (DCs) into the infected gastric mucosa. Although DCs play an important role in the regulation of inflammation, the effects of H. pylori vacuolating cytotoxin (VacA) on DC maturation process have not yet been elucidated. The role of VacA in DC maturation following co-exposure to Escherichia coli lipopolysaccharide (LPS) was investigated. The treatment of immature DCs with LPS up-regulated the expression of surface molecules [e.g. CD40, CD80, CD86 and major histocompatibility complex (MHC) class II], as well as the production of cytokines [e. g. interleukin (IL)-1 beta, IL-12p70 and tumour necrosis gactor (TNF)-alpha] compared with those of unstimulated controls. Co-stimulation with H. pylori VacA significantly reduced the up-regulated DC maturation markers induced by LPS. In addition, VacA sustained the immature state of DCs with high endocytosis and low migratory capacity. The LPS-induced down-regulation of E2F1 expression in DCs was recovered by co-stimulation with VacA. Moreover, suppression of E2F1 by small interfering RNA resulted in a significant recovery of the inhibited DC maturation by VacA. In contrast, VacA did not affect nuclear factor (NF)-kappa B responses to LPS and the NF-kappa B signal was not associated with VacA-induced inhibition of DC maturation. These results suggest that the exposure of DCs to H. pylori VacA negatively regulates DC maturation via the restoration of E2F1. The immunomodulatory action of VacA on DCs may contribute to the ability of VacA-producing H. pylori to establish a persistent infection in the gastric mucosa. | en_US |
dc.description.sponsorship | We thank Dr Patrice Boquet for VacA purification, Dr Martin F. Kagnoff for providing p beta-actin-and pRSV-beta-galactosidase luciferase plasmids and standard beta-actin RNA, Dr Tae Woo Kim for assistance with the DC2.4 cells and Jiyoung Kim, Hye Ri Park and Han-Jin Lee for the excellent technical help. This research was supported by a grant from the Basic Science Research Program through the National Research Foundation of Korea (NRF) (313-2008-2-E00154) and by a grant from the NRF of Korea Grant funded by the Korean Government (MEST) (MRC program no. 2010-0029507). | en_US |
dc.language.iso | en | - |
dc.publisher | Blackwell Publishing Ltd | en_US |
dc.subject | dendritic cells | en_US |
dc.subject | E2F1 | en_US |
dc.subject | H. pylori vacuolating cytotoxin | en_US |
dc.subject | maturation | en_US |
dc.title | Stimulation of dendritic cells with Helicobacter pylori vacuolating cytotoxin negatively regulates their maturation via the restoration of E2F1 | en_US |
dc.type | Article | en_US |
dc.relation.no | 1 | - |
dc.relation.volume | 166 | - |
dc.identifier.doi | 10.1111/j.1365-2249.2011.04447.x | - |
dc.relation.page | 34-45 | - |
dc.relation.journal | CLINICAL AND EXPERIMENTAL IMMUNOLOGY | - |
dc.contributor.googleauthor | Kim, J. M. | - |
dc.contributor.googleauthor | Kim, J. S. | - |
dc.contributor.googleauthor | Yoo, D. Y. | - |
dc.contributor.googleauthor | Ko, S. H. | - |
dc.contributor.googleauthor | Kim, N. | - |
dc.contributor.googleauthor | Kim, H. | - |
dc.contributor.googleauthor | Kim, Y. J. | - |
dc.relation.code | 2011201973 | - |
dc.sector.campus | S | - |
dc.sector.daehak | COLLEGE OF MEDICINE[S] | - |
dc.sector.department | DEPARTMENT OF MEDICINE | - |
dc.identifier.pid | jungmogg | - |
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