A requirement for FcγR in antibody-mediated bacterial toxin neutralization.
A requirement for FcγR in antibody-mediated bacterial toxin neutralization.
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DOI:
10.1084/jem.20100995
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发表时间:
2010-10-25
期刊:
影响因子:
--
通讯作者:
Casadevall A
中科院分区:
文献类型:
--
作者:
Abboud N;Chow SK;Saylor C;Janda A;Ravetch JV;Scharff MD;Casadevall A
Constant regions of antibodies influence toxin neutralization in a manner dependent on FcγR. One important function of humoral immunity is toxin neutralization. The current view posits that neutralization results from antibody-mediated interference with the binding of toxins to their targets, a phenomenon viewed as dependent only on antibody specificity. To investigate the role of antibody constant region function in toxin neutralization, we generated IgG2a and IgG2b variants of the Bacillus anthracis protective antigen–binding IgG1 monoclonal antibody (mAb) 19D9. These antibodies express identical variable regions and display the same specificity. The efficacy of antibody-mediated neutralization was IgG2a > IgG2b > IgG1, and neutralization activity required competent Fcγ receptor (FcγR). The IgG2a mAb prevented lethal toxin cell killing and mitogen-activated protein kinase/extracellular signal-regulated kinase kinase cleavage more efficiently than the IgG1 mAb. Passive immunization with IgG1 and IgG2a mAb protected wild-type mice, but not FcγR-deficient mice, against B. anthracis infection. These results establish that constant region isotype influences toxin neutralization efficacy of certain antibodies through a mechanism that requires engagement of FcγR. These findings highlight a new parameter for evaluating vaccine responses and the possibility of harnessing optimal FcγR interactions in the design of passive immunization strategies.
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影响因子:
4.8
作者:
Abboud, Nareen;De Jesus, Magdia;Casadevall, Arturo
通讯作者:
Casadevall, Arturo
影响因子:
5.4
作者:
BALDRIDGE, JR;BUCHMEIER, MJ
通讯作者:
BUCHMEIER, MJ
影响因子:
3.8
作者:
Markine-Goriaynoff, D;Hulhoven, X;Coutelier, JP
通讯作者:
Coutelier, JP
影响因子:
2.2
作者:
GREENE, G;HODOUS, J;DINTZIS, HM
通讯作者:
DINTZIS, HM
DOI:
10.1083/jcb.98.4.1163
发表时间:
1984-04
期刊:
The Journal of cell biology
影响因子:
--
作者:
Mellman I;Plutner H;Ukkonen P
通讯作者:
Ukkonen P