| First Author | van Montfoort N | Year | 2012 |
| Journal | Eur J Immunol | Volume | 42 |
| Issue | 3 | Pages | 598-606 |
| PubMed ID | 22488363 | Mgi Jnum | J:187782 |
| Mgi Id | MGI:5438184 | Doi | 10.1002/eji.201141613 |
| Citation | van Montfoort N, et al. (2012) Circulating specific antibodies enhance systemic cross-priming by delivery of complexed antigen to dendritic cells in vivo. Eur J Immunol 42(3):598-606 |
| abstractText | Increasing evidence suggests that antibodies can have stimulatory effects on T-cell immunity. However, the contribution of circulating antigen-specific antibodies on MHC class I cross-priming in vivo has not been conclusively established. Here, we defined the role of circulating antibodies in cross-presentation of antigen to CD8(+) T cells. Mice with hapten-specific circulating antibodies, but naiotave for the T-cell antigen, were infused with haptenated antigen and CD8(+) T-cell induction was measured. Mice with circulating hapten-specific antibodies showed significantly enhanced cross-presentation of the injected antigen compared with mice that lacked these antibodies. The enhanced cross-presentation in mice with circulating antigen-specific antibodies was associated with improved antigen capture by APCs. Importantly, CD11c(+) APCs were responsible for the enhanced and sustained cross-presentation, although CD11c(-) APCs had initially captured a significant amount of the injected antigen. Thus, in vivo formation of antigen-antibody immune complexes improves MHC class I cross-presentation, and CD8(+) T-cell activation, demonstrating that humoral immunity can aid the initiation of systemic cellular immunity. These findings have important implications for the understanding of the action of therapeutic antibodies against tumor-associated antigens intensively used in the clinic nowadays. |
