Mrp1 is involved in lipid presentation and iNKT cell activation by Streptococcus pneumoniae.
Mrp1 is involved in lipid presentation and iNKT cell activation by Streptococcus pneumoniae.
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DOI:
10.1038/s41467-018-06646-8
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发表时间:
2018-10-15
影响因子:
16.6
通讯作者:
Kronenberg M
中科院分区:
文献类型:
--
作者:
Chandra S;Gray J;Kiosses WB;Khurana A;Hitomi K;Crosby CM;Chawla A;Fu Z;Zhao M;Veerapen N;Richardson SK;Porcelli SA;Besra G;Howell AR;Sharma S;Peters B;Kronenberg M
Invariant natural killer T cells (iNKT cells) are activated by lipid antigens presented by CD1d, but the pathway leading to lipid antigen presentation remains incompletely characterized. Here we show a whole-genome siRNA screen to elucidate the CD1d presentation pathway. A majority of gene knockdowns that diminish antigen presentation reduced formation of glycolipid-CD1d complexes on the cell surface, including members of the HOPS and ESCRT complexes, genes affecting cytoskeletal rearrangement, and ABC family transporters. We validated the role in vivo for the multidrug resistance protein 1 (Mrp1) in CD1d antigen presentation. Mrp1 deficiency reduces surface clustering of CD1d, which decreased iNKT cell activation. Infected Mrp1 knockout mice show decreased iNKT cell responses to antigens from Streptococcus pneumoniae and were associated with increased mortality. Our results highlight the unique cellular events involved in lipid antigen presentation and show how modification of this pathway can lead to lethal infection. The CD1d pathway present lipid antigens resulting in the activation of iNKT cells but the complete pathway remains to be fully elucidated. Here, Chandra et al. use an siRNA screen and identify Mrp1 as crucial for CD1d lipid presentation and activation of iNKT in the context of Streptococcus pneumoniae infection.
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影响因子:
32.4
作者:
Garg S;Sharma M;Ung C;Tuli A;Barral DC;Hava DL;Veerapen N;Besra GS;Hacohen N;Brenner MB
通讯作者:
Brenner MB
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Stockinger, H
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通讯作者:
Matkó, J