Macropinosome formation by tent pole ruffling in macrophages.
Macropinosome formation by tent pole ruffling in macrophages.
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DOI:
10.1083/jcb.201804137
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发表时间:
2018-11-05
期刊:
影响因子:
--
通讯作者:
Wall AA
中科院分区:
文献类型:
--
作者:
Condon ND;Heddleston JM;Chew TL;Luo L;McPherson PS;Ioannou MS;Hodgson L;Stow JL;Wall AA
Condon et al. use lattice light-sheet microscopy to analyze live macrophages and define a new model of macropinosome formation and closure through tent pole ruffles. The ruffles, which are enhanced by LPS and regulated by Rab13, are erected and supported by F-actin tent poles that cross over and twist to constrict the forming macropinosomes. Pathogen-mediated activation of macrophages arms innate immune responses that include enhanced surface ruffling and macropinocytosis for environmental sampling and receptor internalization and signaling. Activation of macrophages with bacterial lipopolysaccharide (LPS) generates prominent dorsal ruffles, which are precursors for macropinosomes. Very rapid, high-resolution imaging of live macrophages with lattice light sheet microscopy (LLSM) reveals new features and actions of dorsal ruffles, which redefine the process of macropinosome formation and closure. We offer a new model in which ruffles are erected and supported by F-actin tent poles that cross over and twist to constrict the forming macropinosomes. This process allows for formation of large macropinosomes induced by LPS. We further describe the enrichment of active Rab13 on tent pole ruffles and show that CRISPR deletion of Rab13 results in aberrant tent pole ruffles and blocks the formation of large LPS-induced macropinosomes. Based on the exquisite temporal and spatial resolution of LLSM, we can redefine the ruffling and macropinosome processes that underpin innate immune responses.
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影响因子:
4
作者:
Bryant, David M.;Kerr, Markus C.;Stow, Jennifer L.
通讯作者:
Stow, Jennifer L.
影响因子:
3.3
作者:
Bohdanowicz M;Schlam D;Hermansson M;Rizzuti D;Fairn GD;Ueyama T;Somerharju P;Du G;Grinstein S
通讯作者:
Grinstein S
DOI:
10.1083/jcb.201407068
发表时间:
2015-03-02
期刊:
The Journal of cell biology
影响因子:
--
作者:
Ioannou MS;Bell ES;Girard M;Chaineau M;Hamlin JN;Daubaras M;Monast A;Park M;Hodgson L;McPherson PS
通讯作者:
McPherson PS
DOI:
10.1083/jcb.200312118
发表时间:
2004-04-26
期刊:
The Journal of cell biology
影响因子:
--
作者:
Köhler K;Louvard D;Zahraoui A
通讯作者:
Zahraoui A
影响因子:
4.8
作者:
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通讯作者:
McPherson, Peter S.