Abstract:
:Gamma interferon (IFN-gamma)-primed human gingival fibroblasts (HGF) have been shown to produce higher levels of interleukin-8 (IL-8) upon stimulation with bacterial products and inflammatory cytokines than nonprimed controls. In this study, we examined whether priming of HGF with IFN-gamma up-regulates IL-8 production by the cells in response to purified lipopolysaccharide (LPS). The priming effect of IFN-gamma was clearly observed in the high-CD14-expressing (CD14(high)) HGF but not in the low-CD14-expressing (CD14(low)) HGF. The CD14(high) HGF were most effectively primed with IFN-gamma (1,000 IU/ml) for 72 h. To elucidate the mechanism of the priming effects of IFN-gamma for the LPS response by HGF, we examined whether IFN-gamma regulated expression of CD14, Toll-like receptor 2 (TLR2), TLR4, MD-2, and MyD88, all of which are molecules suggested to be associated with LPS signaling. In CD14(high) HGF, IFN-gamma markedly up-regulated CD14 and MyD88 but not TLR4 protein and MD-2 mRNA expression, while in CD14(low) HGF, IFN-gamma slightly increased MyD88 and scarcely affected CD14, TLR4 protein, and MD-2 mRNA levels. LPS-induced IL-8 production by IFN-gamma-primed CD14(high) HGF was significantly inhibited by monoclonal antibodies (MAbs) against CD14 and TLR4, but not by an anti-TLR2 MAb. These findings suggested that IFN-gamma primed CD14(high) HGF to enhance production of IL-8 in response to LPS through augmentation of the CD14-TLR system, where the presence of membrane CD14 was indispensable for the response of HGF to LPS.
journal_name
Infect Immunjournal_title
Infection and immunityauthors
Tamai R,Sakuta T,Matsushita K,Torii M,Takeuchi O,Akira S,Akashi S,Espevik T,Sugawara S,Takada Hdoi
10.1128/iai.70.3.1272-1278.2002keywords:
subject
Has Abstractpub_date
2002-03-01 00:00:00pages
1272-8issue
3eissn
0019-9567issn
1098-5522journal_volume
70pub_type
杂志文章abstract::Mesocricetus auratus (golden hamsters) infected with leishmania developed characteristic B cell immune responses that depended on the infecting species of leishmania. Thus, hamsters infected with viscerotropic leishmania (Leishmania donovani) developed antileishmania antibodies and hypergammaglobulinemia due to polycl...
journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.38.3.871-876.1982
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journal_title:Infection and immunity
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doi:10.1128/IAI.62.12.5491-5497.1994
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.58.1.205-213.1990
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journal_title:Infection and immunity
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.55.8.1774-1778.1987
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journal_title:Infection and immunity
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doi:10.1128/IAI.64.12.4940-4945.1996
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.46.2.429-434.1984
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.37.2.558-567.1982
更新日期:1982-08-01 00:00:00
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journal_title:Infection and immunity
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更新日期:2008-01-01 00:00:00
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journal_title:Infection and immunity
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.65.7.2861-2867.1997
更新日期:1997-07-01 00:00:00
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/iai.71.6.3125-3130.2003
更新日期:2003-06-01 00:00:00
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.59.8.2767-2773.1991
更新日期:1991-08-01 00:00:00
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.40.2.670-674.1983
更新日期:1983-05-01 00:00:00
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journal_title:Infection and immunity
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doi:10.1128/IAI.54.3.886-892.1986
更新日期:1986-12-01 00:00:00
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journal_title:Infection and immunity
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doi:10.1128/IAI.32.1.169-172.1981
更新日期:1981-04-01 00:00:00
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journal_title:Infection and immunity
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更新日期:2007-01-01 00:00:00
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journal_title:Infection and immunity
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doi:10.1128/IAI.59.10.3451-3462.1991
更新日期:1991-10-01 00:00:00
abstract::As an intracellular protozoan parasite, Toxoplasma gondii is likely to exploit proteases for host cell invasion, acquisition of nutrients, avoidance of host protective responses, escape from the parasitophorous vacuole, differentiation, and other activities. T. gondii serine protease inhibitor 1 (TgPI1) is the most ab...
journal_title:Infection and immunity
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journal_title:Infection and immunity
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doi:10.1128/IAI.14.4.970-975.1976
更新日期:1976-10-01 00:00:00
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.21.2.678-680.1978
更新日期:1978-08-01 00:00:00
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journal_title:Infection and immunity
pub_type: 杂志文章
doi:10.1128/IAI.64.5.1842-1845.1996
更新日期:1996-05-01 00:00:00
abstract::The protective efficacy of Mycobacterium bovis BCG can be markedly augmented by stable integration of Mycobacterium tuberculosis genomic region RD1. BCG complemented with RD1 (BCG::RD1) encodes nine additional proteins. Among them, 10-kDa culture filtrate protein (CFP-10) and ESAT-6 (6-kDa early secreted antigenic tar...
journal_title:Infection and immunity
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doi:10.1128/iai.72.4.2170-2176.2004
更新日期:2004-04-01 00:00:00