Published online
doi:10.1084/jem.20071006
The Journal of Experimental Medicine, Vol. 204, No. 11, 2655-2665
The Rockefeller University Press, 0022-1007 $30.00
© Bende et al.
Germinal centers in human lymph nodes contain reactivated memory B cells
Richard J. Bende,
Febe van Maldegem,
Martijn Triesscheijn,
Thera A.M. Wormhoudt,
Richard Guijt, and
Carel J.M. van Noesel
Department of Pathology, Academic Medical Center, 1105 AZ Amsterdam, Netherlands
CORRESPONDENCE C.J.M. van Noesel: c.j.vannoesel{at}amc.uva.nl
To reveal migration trails of antigen-responsive B cells in lymphoid tissue, we analyzed immunoglobulin (Ig)M-VH and IgG-VH transcripts of germinal center (GC) samples microdissected from three reactive human lymph nodes. Single B cell clones were found in multiple GCs, one clone even in as many as 19 GCs. In several GCs, IgM and IgG variants of the same clonal origin were identified. The offspring of individual hypermutated IgG memory clones were traced in multiple GCs, indicating repeated engagement of memory B cells in GC reactions. These findings imply that recurring somatic hypermutation progressively drives the Ig repertoire of memory B cells to higher affinities and infer that transforming genetic hits in non-Ig genes during lymphomagenesis do not have to arise during a single GC passage, but can be collected during successive recall responses.
Abbreviations used: Ag, antigen(ic); CDR3, complementarity determining region 3; CSR, class-switch recombination; FM, follicular mantle zone; GC, germinal center; IgV, Ig variable region; SHM, somatic hypermutation; TZ, T cell zone.

CiteULike
Complore
Connotea
Del.icio.us
Digg
Facebook
Reddit
Technorati
Twitter What's this?
Related Article
-
Germinal centers are free for all
- Hema Bashyam
J. Exp. Med. 2007 204: 2497.
[Full Text]
[PDF]
This article has been cited by other articles:
-
Bende, R. J., van Maldegem, F., van Noesel, C. J.M.
(2009). Chronic inflammatory disease, lymphoid tissue neogenesis and extranodal marginal zone B-cell lymphomas. haematol
94: 1109-1123
[Abstract]
[Full Text]
-
Caron, G., Le Gallou, S., Lamy, T., Tarte, K., Fest, T.
(2009). CXCR4 Expression Functionally Discriminates Centroblasts versus Centrocytes within Human Germinal Center B Cells. J. Immunol.
182: 7595-7602
[Abstract]
[Full Text]
-
Willis, S. N., Mallozzi, S. S., Rodig, S. J., Cronk, K. M., McArdel, S. L., Caron, T., Pinkus, G. S., Lovato, L., Shampain, K. L., Anderson, D. E., Anderson, R. C. E., Bruce, J. N., O'Connor, K. C.
(2009). The Microenvironment of Germ Cell Tumors Harbors a Prominent Antigen-Driven Humoral Response. J. Immunol.
182: 3310-3317
[Abstract]
[Full Text]