Interferon γ-induced GTPase promotes invasion of Listeria monocytogenes into trophoblast giant cells.

Interferon γ-induced GTPase promotes invasion of Listeria monocytogenes into trophoblast giant cells.
复制标题

DOI:
10.1038/srep08195
复制
发表时间:
2015-02-03
期刊:
影响因子:
4.6
通讯作者:
Watarai M
Watarai M
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Tachibana M;Hashino M;Watanabe K;Shimizu T;Watarai M

文献摘要

参考文献

被引文献

相似文献

单核细胞增生李斯特菌是众所周知的有能力越过胎盘屏障,导致胎儿感染和流产。然而,导致感染性流产的机制尚不清楚。在这项研究中,我们证明干扰素γ诱导的GTPase (IGTP)有助于单核增生乳杆菌侵入胎盘免疫细胞滋养层巨细胞(TG)。TG细胞中IGTP的敲低降低了单核增生乳杆菌侵袭的相对效率。此外,在TG细胞中,IGTP在感染的单核增生乳杆菌周围积累。用磷脂酰肌醇3-激酶(PI3K)/Akt抑制剂处理TG细胞也可减少细菌侵袭。PI3K/Akt抑制剂或IGTP敲低可降低磷酸化Akt的量。单唾液四己基神经节苷脂(GM1)神经节苷脂,脂筏标记物,在TG细胞含单核增生乳杆菌液泡膜中积累。此外,使用脂质筏抑制剂治疗可减少细菌侵袭。这些结果表明,igtp诱导的PI3K/Akt信号通路的激活促进了细菌入侵TG细胞。
Listeria monocytogenes is well known for having the ability to cross the placental barrier, leading to fetal infections and abortion. However, the mechanisms leading to infectious abortion are poorly understood. In this study, we demonstrate that interferon γ-induced GTPase (IGTP) contributes to the invasion of L. monocytogenes into trophoblast giant (TG) cells, which are placental immune cells. Knockdown of IGTP in TG cells decreased the relative efficiencies of L. monocytogenes invasion. Moreover, IGTP accumulated around infected L. monocytogenes in TG cells. Treatment of TG cells with phosphatidylinositol 3-kinase (PI3K)/Akt inhibitors also reduced bacterial invasion. PI3K/Akt inhibitor or IGTP knockdown reduced the amount of phosphorylated Akt. Monosialotetrahexosylganglioside (GM1) gangliosides, lipid raft markers, accumulated in the membrane of L. monocytogenes-containing vacuoles in TG cells. Furthermore, treatment with a lipid raft inhibitor reduced bacterial invasion. These results suggest that IGTP-induced activation of the PI3K/Akt signaling pathway promotes bacterial invasion into TG cells.
DOI: 10.1186/1471-2180-5-22
发表时间: 2005-05-04
期刊: BMC microbiology
影响因子: 4.2
作者:
Kim S;Lee DS;Watanabe K;Furuoka H;Suzuki H;Watarai M
通讯作者: Watarai M
DOI: 10.1128/iai.01288-07
发表时间: 2008-11-01
影响因子: 3.1
作者:
Melzer, T.;Duffy, A.;Halonen, S. K.
通讯作者: Halonen, S. K.
DOI: 10.1016/j.cellsig.2006.12.003
发表时间: 2007-05-01
影响因子: 4.8
作者:
Arcaro, Alexandre;Aubert, Muriel;Seckl, Michael J.
通讯作者: Seckl, Michael J.
DOI: 10.1530/rep.1.00214
发表时间: 2004-08-01
期刊: REPRODUCTION
影响因子: 3.8
作者:
Amarante-Paffaro, A;Queiroz, GS;Bevilacqua, E
通讯作者: Bevilacqua, E
DOI: 10.1084/jem.20051047
发表时间: 2005-12-19
期刊: The Journal of experimental medicine
影响因子: --
作者:
Hegazi RA;Rao KN;Mayle A;Sepulveda AR;Otterbein LE;Plevy SE
通讯作者: Plevy SE