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

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Complementary signaling through flt3 and interleukin-7 receptor alpha is indispensable for fetal and adult B cell genesis.

Extensive studies of mice deficient in one or several cytokine receptors have failed to support an indispensable role of cytokines in development of multiple blood cell lineages. Whereas B1 B cells and Igs are sustained at normal levels throughout life of mice deficient in IL-7, IL-7Ralpha, common cytokine receptor gamma chain, or flt3 ligand (FL), we report here that adult mice double deficient in IL-7Ralpha and FL completely lack visible LNs, conventional IgM+ B cells, IgA+ plasma cells, and B1 cells, and consequently produce no Igs. All stages of committed B cell progenitors are undetectable in FL-/- x IL-7Ralpha-/- BM that also lacks expression of the B cell commitment factor Pax5 and its direct target genes. Furthermore, in contrast to IL-7Ralpha-/- mice, FL-/- x IL-7Ralpha-/- mice also lack mature B cells and detectable committed B cell progenitors during fetal development. Thus, signaling through the cytokine tyrosine kinase receptor flt3 and IL-7Ralpha are indispensable for fetal and adult B cell development.[1]

References

  1. Complementary signaling through flt3 and interleukin-7 receptor alpha is indispensable for fetal and adult B cell genesis. Sitnicka, E., Brakebusch, C., Martensson, I.L., Svensson, M., Agace, W.W., Sigvardsson, M., Buza-Vidas, N., Bryder, D., Cilio, C.M., Ahlenius, H., Maraskovsky, E., Peschon, J.J., Jacobsen, S.E. J. Exp. Med. (2003) [Pubmed]
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