...
首页> 外文期刊>Science Immunology >Intranasal priming induces local lung-resident B cell populations that secrete protective mucosal antiviral IgA
【24h】

Intranasal priming induces local lung-resident B cell populations that secrete protective mucosal antiviral IgA

机译:鼻内启动会诱导局部肺居民B细胞群体分泌保护性粘膜抗病毒IgA

获取原文
获取原文并翻译 | 示例
           

摘要

Antibodies secreted at the mucosal surface play an integral role in immune defense by serving to neutralize the pathogen and promote its elimination at the site of entry. Secretory immunoglobulin A (IgA) is a predominant Ig isotype at mucosal surfaceswhose epithelial cells express polymeric Ig receptor capable of transporting dimeric IgA to the lumen. Although the role of IgA in intestinal mucosa has been extensively studied, the cell types responsible for secreting the IgA that protects the host against pathogens in the lower respiratory tract are less clear. Here, using a mouse model of influenza virus infection, we demonstrate that intranasal, but not systemic, immunization induces local IgA secretion in the bronchoalveolar space. Using single-cell RNA sequencing, we found a heterogeneous population of IgA-expressing cells within the respiratory mucosa, including tissue-resident memory B cells, plasmablasts, and plasma cells. IgA-secreting cell establishment within the lung required CXCR3. An intranasally administered protein-based vaccine also led to the establishment of IgA-secreting cells in the lung, but not when given intramuscularly or intraperitoneally. Last, local IgA secretion correlated with superior protection against secondary challenge with homologous and heterologous virus infection than circulating antibodies alone. These results provide key insights into establishment of protective immunity in the lung based on tissue-resident IgA-secreting B cells and inform vaccine strategies designed to elicit highly effective immune protection against respiratory virus infections.
机译:粘膜表面分泌的抗体在免疫防御中起着不可或缺的作用,通过中和病原体并促进其在入境部位消除。分泌免疫球蛋白A(IgA)是粘膜表面的主要Ig同种型,上皮细胞表达能够将二聚体IgA转运到管腔的聚合物Ig受体。尽管已经对IgA在肠粘膜中的作用进行了广泛的研究,但负责分泌IgA的细胞类型可保护宿主免受下呼吸道中的病原体免受病原体的影响。在这里,使用流感病毒感染的小鼠模型,我们证明了鼻内但没有全身性免疫,可诱导支气管肺泡空间中的局部IgA分泌。使用单细胞RNA测序,我们发现呼吸粘膜内的IGA表达细胞的异质群,包括组织居住的记忆B细胞,浆膜和血浆细胞。 IGA分泌细胞在肺中的建立需要CXCR3。鼻内给药的基于蛋白质的疫苗还导致在肺中建立了IgA分泌细胞,但在肌肉内或腹膜内进行时没有。最后,与单独循环抗体相比,局部IGA分泌与对同源和异源病毒感染的次要挑战相关。这些结果为基于组织居住的IGA分泌B细胞建立保护性免疫的关键见解,并为旨在引发高效免疫保护抗衡呼吸道病毒感染的疫苗策略提供了信息。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号