| First Author | Ichikawa D | Year | 2015 |
| Journal | J Immunol | Volume | 194 |
| Issue | 2 | Pages | 606-14 |
| PubMed ID | 25480561 | Mgi Jnum | J:280411 |
| Mgi Id | MGI:6363375 | Doi | 10.4049/jimmunol.1402383 |
| Citation | Ichikawa D, et al. (2015) Natural anti-intestinal goblet cell autoantibody production from marginal zone B cells. J Immunol 194(2):606-14 |
| abstractText | Expression of a germline VH3609/D/JH2 IgH in mice results in the generation of B1 B cells with anti-thymocyte/Thy-1 glycoprotein autoreactivity by coexpression of Vk21-5/Jk2 L chain leading to production of serum IgM natural autoantibody. In these same mice, the marginal zone (MZ) B cell subset in spleen shows biased usage of a set of Ig L chains different from B1 B cells, with 30% having an identical Vk19-17/Jk1 L chain rearrangement. This VH3609/Vk19-17 IgM is reactive with intestinal goblet cell granules, binding to the intact large polymatrix form of mucin 2 glycoprotein secreted by goblet cells. Analysis of a mukappa B cell AgR (BCR) transgenic (Tg) mouse with this anti-goblet cell/mucin2 autoreactive (AGcA) specificity demonstrates that immature B cells expressing the Tg BCR become MZ B cells in spleen by T cell-independent BCR signaling. These Tg B cells produce AGcA as the predominant serum IgM, but without enteropathy. Without the transgene, AGcA autoreactivity is low but detectable in the serum of BALB/c and C.B17 mice, and this autoantibody is specifically produced by the MZ B cell subset. Thus, our findings reveal that AGcA is a natural autoantibody associated with MZ B cells. |
