TgMAPK1 is a Toxoplasma gondii MAP kinase that hijacks host MKK3 signals to regulate virulence and interferon-γ-mediated nitric oxide production.
TgMAPK1 is a Toxoplasma gondii MAP kinase that hijacks host MKK3 signals to regulate virulence and interferon-γ-mediated nitric oxide production.
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DOI:
10.1016/j.exppara.2013.03.016
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发表时间:
2013-07
影响因子:
2.1
通讯作者:
Curiel, Tyler J.
中科院分区:
文献类型:
--
作者:
Brumlik, Michael J.;Pandeswara, Srilakshmi;Ludwig, Sara M.;Jeansonne, Duane P.;Lacey, Michelle R.;Murthy, Kruthi;Daniel, Benjamin J.;Wang, Rong-Fu;Thibodeaux, Suzanne R.;Church, Kristina M.;Hurez, Vincent;Kious, Mark J.;Zhang, Bin;Alagbala, Adebusola;Xia, Xiaojun;Curiel, Tyler J.
The parasite Toxoplasma gondii controls tissue-specific nitric oxide (NO), thereby augmenting virulence and immunopathology through poorly-understood mechanisms. We now identify TgMAPK1, a Toxoplasma mitogen-activated protein kinase (MAPK), as a virulence factor regulating tissue-specific parasite burden by manipulating host interferon (IFN)-γ-mediated inducible nitric oxide synthase (iNOS). Toxoplasma with reduced TgMAPK1 expression (TgMAPK1lo) demonstrated that TgMAPK1 facilitates IFN-γ-driven p38 MAPK activation, reducing IFN-γ-generated NO in an MKK3-dependent manner, blunting IFN-γ-mediated parasite control. TgMAPK1lo infection in wild type mice produced ≥ten-fold lower parasite burden versus control parasites with normal TgMAPK1 expression (TgMAPK1con). Reduced parasite burdens persisted in IFN-γ KO mice, but equalized in normally iNOS-replete organs from iNOS KO mice. Parasite MAPKs are far less studied than other parasite kinases, but deserve additional attention as targets for immunotherapy and drug discovery.
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DOI:
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发表时间:
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影响因子:
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