Programmed cell death 1 suppresses B-1b cell expansion and long-lived IgG production in response to T cell-independent type 2 antigens.
Programmed cell death 1 suppresses B-1b cell expansion and long-lived IgG production in response to T cell-independent type 2 antigens.
复制标题
DOI:
10.4049/jimmunol.1101990
复制
发表时间:
2011-11-15
期刊:
影响因子:
--
通讯作者:
Haas KM
中科院分区:
文献类型:
--
作者:
Haas KM
B1b cells play a key role in producing antibodies (Ab) against T cell-independent type 2 (TI-2) antigens (Ags). However, the factors regulating Ab production by this unique B cell subset are not well understood. In this study, a detailed analysis of the B cell response to TNP-Ficoll was performed using normal mice. TNP-Ficoll delivered i.p. or i.v. induced rapid Ag-specific B-1b cell activation, expansion, isotype switching and plasmablast/plasma cell differentiation. Ag-specific B-1b cell numbers peaked at day 5 and then gradually declined in the spleen but remained elevated in the peritoneal cavity beyond 40 days post-immunization. In addition to expressing CD43, CD44, and CD86, Ag-activated B-1b cells transiently expressed PD-1, which functionally suppressed BCR-induced B-1b cell in vitro proliferation when additional costimulatory signals were lacking. Inhibiting PD-1:PD-1 ligand (PDL) interactions during TNP-Ficoll immunization significantly enhanced Ag-specific B-1b cell expansion and the frequency of IgG isotype switching and plasmablast/plasma cell differentiation. Remarkably, PD-1 mAb blockade during the first week following immunization resulted in significantly increased numbers of both splenic and bone marrow Ag-specific IgG3, but not IgM, secreting cells at both early (day 5) and late (week 6) timepoints. Moreover, Ag-specific serum IgG3, as well as IgG2c, IgG2b, and IgA levels remained significantly elevated in PD-1 mAb-treated relative to control Ab-treated mice for at least 6 weeks post-immunization. Thus, PD-1:PDL interactions occurring shortly after initial TI-2 Ag encounter play a critical role in suppressing Ag-specific B-1b cell expansion and the development of long-term IgG-producing bone marrow and spleen cells.
登录
查看更多内容
影响因子:
--
作者:
Klein Klouwenberg P;Bont L
通讯作者:
Bont L
影响因子:
5.4
作者:
FREER, G;BURKHART, C;ZINKERNAGEL, RM
通讯作者:
ZINKERNAGEL, RM
影响因子:
4.4
作者:
Fairfax, Kirsten A.;Corcoran, Lynn M.;Tarlinton, David M.
通讯作者:
Tarlinton, David M.
影响因子:
32.4
作者:
Haas, KM;Hasegawa, M;Tedder, TF
通讯作者:
Tedder, TF
影响因子:
32.4
作者:
Alugupalli, KR;Leong, JM;Gerstein, RM
通讯作者:
Gerstein, RM