Size-Dependent Segregation Controls Macrophage Phagocytosis of Antibody-Opsonized Targets.
Size-Dependent Segregation Controls Macrophage Phagocytosis of Antibody-Opsonized Targets.
复制标题
大小依赖性分离控制巨噬细胞对抗体调理靶标的吞噬作用。
DOI:
10.1016/j.cell.2018.05.059
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发表时间:
2018-06-28
期刊:
影响因子:
64.5
通讯作者:
Fletcher DA
中科院分区:
文献类型:
--
作者:
Bakalar MH;Joffe AM;Schmid EM;Son S;Podolski M;Fletcher DA
Macrophages protect the body from damage and disease by targeting antibody-opsonized cells for phagocytosis. Though antibodies can be raised against antigens with diverse structures, shapes, and sizes, it is unclear why some are more effective at triggering immune responses than others. Here we define an antigen height threshold that regulates phagocytosis of both engineered and cancer-specific antigens by macrophages. Using a reconstituted model of antibody-opsonized target cells, we find that phagocytosis is dramatically impaired for antigens that position antibodies >10 nm from the target surface. Decreasing antigen height drives segregation of antibody-bound Fc receptors from the inhibitory phosphatase CD45 in an integrin-independent manner, triggering Fc receptor phosphorylation and promoting phagocytosis. Our work shows that close contact between macrophage and target is a requirement for efficient phagocytosis, suggesting that therapeutic antibodies should target short antigens in order to trigger Fc receptor activation through size-dependent physical segregation. The size of an antigen is a critical determinant of efficient macrophage phagocytosis
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影响因子:
15.3
作者:
Fitzer-Attas, C J;Lowry, M;Crowley, M T;Finn, A J;Meng, F;DeFranco, A L;Lowell, C A
通讯作者:
Lowell, C A
影响因子:
46.9
作者:
Doench JG;Fusi N;Sullender M;Hegde M;Vaimberg EW;Donovan KF;Smith I;Tothova Z;Wilen C;Orchard R;Virgin HW;Listgarten J;Root DE
通讯作者:
Root DE
影响因子:
20.3
作者:
Cordoba, Shaun-Paul;Choudhuri, Kaushik;van der Merwe, P. Anton
通讯作者:
van der Merwe, P. Anton
影响因子:
48
作者:
Gibson, Daniel G.;Young, Lei;Smith, Hamilton O.
通讯作者:
Smith, Hamilton O.
影响因子:
64.8
作者:
Cho, HS;Mason, K;Leahy, DJ
通讯作者:
Leahy, DJ