Effect of CpG oligonucleotides on vaccine-induced B cell memory.

Effect of CpG oligonucleotides on vaccine-induced B cell memory.
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DOI:
10.4049/jimmunol.181.8.5785
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发表时间:
2008-10-15
期刊:
Journal of immunology (Baltimore, Md. : 1950)
影响因子:
--
通讯作者:
Klinman DM
Klinman DM
中科院分区:
其他
文献类型:
--
作者:
Tross D;Klinman DM

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将含有未甲基化CpG基序的合成寡脱氧核苷酸(ODN)添加到吸附的炭疽疫苗(AVA,许可的人类疫苗)中增加所得Ab应答的速度和幅度。抗体滴度在保护范围内持续>1年,显著长于单独接种AVA的动物。出乎意料的是,大多数用含CpG佐剂的AVA免疫的小鼠即使在它们的Ab滴度下降到亚保护范围后也保持对炭疽感染的抗性。这些动物的存活是由攻击后立即重新刺激的高亲和力记忆B细胞重新产生保护性抗体介导的。因此,以前未认识到的CpG ODN佐剂的益处是它们扩增长寿命记忆B细胞群的能力。目前的研究结果表明,CpG佐剂的AVA介导的保护,通过刺激一个强大的/持久的血清抗体反应,并通过产生一个高亲和力的记忆B细胞的长寿池。
Adding synthetic oligodeoxynucleotides (ODN) containing unmethylated CpG motifs to Anthrax Vaccine Adsorbed (AVA, the licensed human vaccine) increases the speed and magnitude of the resultant Ab response. Ab titers persist in the protective range for >1 year, significantly longer than in animals vaccinated with AVA alone. Unexpectedly, a majority of mice immunized with CpG-adjuvanted AVA maintained resistance to anthrax infection even after their Ab titers had declined into the sub-protective range. The survival of these animals was mediated by the de novo production of protective Abs by high affinity memory B cells re-stimulated immediately after challenge. Thus, a previously unrecognized benefit of CpG ODN adjuvants is their ability to expand the long-lived memory B cell population. Current findings demonstrate that CpG-adjuvanted AVA mediates protection both by stimulating a strong/persistent serum Ab response and by generating a high-affinity long-lived pool of memory B cells.
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