Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Jenh, C.H. et al.

Jenh, Cox, Hipkin, Lu, Pugliese-Sivo, Gonsiorek, Chou, Narula, Zavodny,

Human B cell-attracting chemokine 1 (BCA-1; CXCL13) is an agonist for the human CXCR3 receptor.

The CXC chemokine CXCL13, known as BCA-1 (B cell-attracting chemokine 1) or BLC ( B-lymphocyte chemoattractant), has been identified as an efficacious attractant selective for B lymphocytes. The chemokine receptor BLR1 (Burkitt's lymphoma receptor 1)/CXCR5 expressed by all mature B cells has to date been identified as the only known receptor for BCA-1. As the loss of the BLR1/ CXCR5 receptor is sufficient to disrupt organization of follicles in spleen and Peyer's patches, BCA-1 may act as a B cell homing chemokine. Nonetheless, BCA-1 has not been tested against all known chemokine receptors. In this study, we report that human BCA-1 competes with radiolabeled interferon gamma ( IFN-gamma) inducible protein 10 ( IP-10) for binding to the human CXCR3 receptor expressed in Ba/F3 and 293EBNA cell lines. Furthermore, human BCA-1 is an efficacious attractant for human CXCR3 transfected cells; BCA-1- induced chemotaxis is inhibited by a monoclonal antibody against human CXCR3. In these cells, as in human B lymphocytes expressing CXCR5, BCA-1 does not induce a calcium flux. Indeed, BCA-1 attenuates the calcium flux induced by IP-10. In addition, human BCA-1 is an agonist in stimulating GTP gamma S binding. Together these data suggest that human BCA-1 is a specific and functional G-protein- linked chemotactic ligand for the human CXCR3 receptor. The biological significance of this new finding is supported by our recent observation that human BCA-1 induces chemotaxis of activated T cells and the BCA-1- induced chemotaxis is inhibited by a monoclonal antibody against human CXCR3.[1]

References

Human B cell-attracting chemokine 1 (BCA-1; CXCL13) is an agonist for the human CXCR3 receptor. Jenh, C.H., Cox, M.A., Hipkin, W., Lu, T., Pugliese-Sivo, C., Gonsiorek, W., Chou, C.C., Narula, S.K., Zavodny, P.J. Cytokine (2001) [Pubmed]

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