Subcapsular sinus macrophages limit dissemination of West Nile virus particles after inoculation but are not essential for the development of West Nile virus-specific T cell responses.

Subcapsular sinus macrophages limit dissemination of West Nile virus particles after inoculation but are not essential for the development of West Nile virus-specific T cell responses.
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DOI:
10.1016/j.virol.2013.12.021
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发表时间:
2014-02
期刊:
影响因子:
3.7
通讯作者:
Milligan, Gregg N.
Milligan, Gregg N.
中科院分区:
医学3区
文献类型:
--
作者:
Winkelmann, Evandro R.;Widman, Douglas G.;Xia, Jingya;Johnson, Alison J.;van Rooijen, Nico;Mason, Peter W.;Bourne, Nigel;Milligan, Gregg N.

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Macrophages encounter flaviviruses early after injection by arthropod vectors. Using in vivo imaging of mice inoculated with firefly luciferase-expressing single-cycle flavivirus particles (FLUC-SCFV), we examined the initial dissemination of virus particles in the presence or absence of lymph node (LN) -resident macrophages. Higher luciferase activity, indicating higher SCFV gene expression, was detected in the footpad of macrophage-depleted mice after 24 hours post infection (hpi). Moreover, FLUC-SCFV particles disseminated to the spleen within 14 hpi in macrophage-depleted, but not control mice. Although macrophages presented SCFV to naïve T cells in vitro, depletion of subcapsular sinus (SCS) macrophages did not alter the magnitude or effector function of the WNV-specific CD8+ T cell response. Together, these results indicate that SCS macrophages play a role in limiting the dissemination of SCFV early in infection but are not required for the generation of a polyfunctional WNV-specific CD8+ T cell response in the draining LN.
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