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

Costimulation of T-cell proliferation by anti-L-selectin antibody is associated with the reduction of a cdk inhibitor p27.

In this study, we investigated the costimulatory activity of l-selectin in primary mouse T cells. Proliferation induced by immobilized anti-CD3 antibody was enhanced by immobilized anti-l-selectin antibody. In contrast to the anti-CD28 antibody, anti-l-selectin antibody did not enhance interleukin-2 (IL-2) expression. One of the cyclin-dependent kinase ( cdk) inhibitors, p27, was reduced by costimulation with anti-l-selectin antibody, as with anti-CD28 antibody, suggesting that the enhancement of T-cell proliferation is the result of a reduced p27 level. Since anti-l-selectin antibody enhanced the activation of extracellular signal-regulated protein kinase ( ERK) induced by anti-CD3 antibody, ERK plays an important role in signal integration during costimulation. These results suggest that the mechanism of T-cell costimulation is at least partially different between CD28 and l-selectin, although the two mechanisms share a common downstream event, a reduction of p27 level, as a critical biochemical event in the cell cycle progression of T cells.[1]

References

  1. Costimulation of T-cell proliferation by anti-L-selectin antibody is associated with the reduction of a cdk inhibitor p27. Nishijima, K., Ando, M., Sano, S., Hayashi-Ozawa, A., Kinoshita, Y., Iijima, S. Immunology (2005) [Pubmed]
 
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