TLR2, TLR4 and the MyD88 Signaling Are Crucial For the In Vivo Generation and the Longevity of Long-Lived Antibody-Secreting Cells

被引:15
|
作者
Komegae, Evilin Naname
Grund, Lidiane Zito
Lopes-Ferreira, Monica
Lima, Carla [1 ]
机构
[1] Univ Sao Paulo, Butantan Inst, Special Lab Appl Toxinol, Immunoregulat Unit, Sao Paulo, Brazil
来源
PLOS ONE | 2013年 / 8卷 / 08期
关键词
TOLL-LIKE RECEPTORS; MEMORY B-CELLS; NATTERERI FISH VENOM; PLASMA-CELLS; THALASSOPHRYNE-NATTERERI; TRANSCRIPTION FACTOR; B-1; CELLS; KININOGENASE ACTIVITY; ACQUIRED-IMMUNITY; GENE-EXPRESSION;
D O I
10.1371/journal.pone.0071185
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
This study was undertaken to gain better insights into the role of TLRs and MyD88 in the development and differentiation of memory B cells, especially of ASC, during the Th2 polarized memory response induced by Natterins. Our in vivo findings demonstrated that the anaphylactic IgG1 production is dependent on TLR2 and MyD88 signaling, and that TLR4 acts as adjuvant accelerating the synthesis of high affinity-IgE. Also, TLR4 (MyD88-independent) modulated the migration of innate-like B cells (B1a and B2) out of the peritoneal cavity, and the emigration from the spleen of B1b and B2 cells. TLR4 (MyD88-independent) modulated the emigration from the spleen of Bmem as well as ASC B220(pos). TLR2 triggered to the egress from the peritoneum of Bmem (MyD88-dependent) and ASC B220(pos) (MyD88-independent). We showed that TLR4 regulates the degree of expansion of Bmem in the peritoneum (MyD88-dependent) and in BM (MyD88-independent) as well as of ASC B220(neg) in the spleen (MyD88-independent). TLR2 regulated the intensity of the expansion of Bmem (MyD88-independent) and ASC B220(pos) (MyD88-dependent) in BM. Finally, TLR4 signals sustained the longevity of ASC B220(pos) (MyD88-independent) and ASC B220(neg) into the peritoneum (MyD88-dependent) and TLR2 MyD88-dependent signaling supported the persistence of B2 cells in BM, Bmem in the spleen and ASC B220(neg) in peritoneum and BM. Terminally differentiated ASC B220(neg) required the cooperation of both signals through TLR2/TLR4 via MyD88 for longevity in peritoneum, whereas Bmem required only TLR2/MyD88 to stay in spleen, and ASC B220(pos) rested in peritoneum dependent on TLR4 signaling. Our data sustain that earlier events on memory B cells differentiation induced in secondary immune response against Natterins, after secondary lymph organs influx and egress, may be the key to determining peripheral localization of innate-like B cells and memory B cells as ASC B220(pos) and ASC B220(neg)
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页数:19
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