Linked Life Data

21314733

Source:http://linkedlifedata.com/resource/pubmed/id/21314733

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pubmed-article:21314733pubmed:abstractTextPrevotella intermedia is an important periodontal pathogen that induces various inflammatory and immune responses. In this study, we investigated the effects of P. intermedia on the plasminogen system in human periodontal ligament (hPDL) cells and explored the signaling pathways involved. Using semi-quantitative reverse transcription (RT)-PCR and quantitative real-time RT-qPCR, we demonstrated that P. intermedia challenge increased tissue-type plasminogen activator (tPA) and plasminogen activator inhibitor (PAI)-2 expression in a concentration- and time-dependent manner, but exerted no influence on urokinase-type plasminogen activator and PAI-1mRNA expression in hPDL cells. Prevotella intermedia stimulation also enhanced tPA protein secretion as confirmed by enzyme-linked immunosorbent assay. Western blot results revealed that P. intermedia treatment increased phosphorylation of extracellular signal-regulated kinase (ERK), c-Jun N-terminal kinase (JNK) and p38 kinase (p38). ERK, JNK and protein kinase C inhibitors significantly attenuated the P. intermedia-induced tPA and PAI-2 expression. Furthermore, p38 and phosphatidylinositol 3-kinase inhibitors markedly decreased PAI-2 expression, whereas they showed no or little inhibition on tPA expression. In contrast, inhibition of protein kinase A greatly enhanced the upregulatory effect of P. intermedia on tPA and PAI-2 expression. Our results suggest that P. intermedia may contribute to periodontal tissue destruction by upregulating tPA and PAI-2 expression in hPDL cells via multiple signaling pathways.lld:pubmed
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pubmed-article:21314733pubmed:authorpubmed-author:ZhangMingMlld:pubmed
pubmed-article:21314733pubmed:authorpubmed-author:GuanSu-MinSMlld:pubmed
pubmed-article:21314733pubmed:authorpubmed-author:HeJian-JunJJlld:pubmed
pubmed-article:21314733pubmed:authorpubmed-author:ShuLeiLlld:pubmed
pubmed-article:21314733pubmed:copyrightInfo© 2011 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved.lld:pubmed
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pubmed-article:21314733pubmed:volume62lld:pubmed
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pubmed-article:21314733pubmed:year2011lld:pubmed
pubmed-article:21314733pubmed:articleTitlePrevotella intermedia stimulates tissue-type plasminogen activator and plasminogen activator inhibitor-2 expression via multiple signaling pathways in human periodontal ligament cells.lld:pubmed
pubmed-article:21314733pubmed:affiliationDepartment of Preventive Dentistry and Infection Control Office, School of Stomatology, The Fourth Military Medical University, Xi'an, China. jchsmg@fmmu.edu.cnlld:pubmed
pubmed-article:21314733pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:21314733pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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