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- Title
Ia binding ligands and cAMP stimulate nuclear translocation of PKC in B lymphocytes.
- Authors
Cambier, John C.; Newell, M. Karen; Justement, Louis B.; McGuire, James C.; Leach, Karen L.; Chen, Zheng Z.
- Abstract
Altered subcellular distribution and activity of protein kinase C (PKC) is associated with transmembrane signalling in a variety of systems in which receptor occupancy leads to increased hydrolysis of polyphosphoinositides. Here we report evidence that in B lymphocytes, cyclic-cAMP-generating signal transduction pathways can activate translocation of PKC from the cytosol to the nucleus. Elevated cAMP levels and translocation of PKC to the nucleus are induced by antibodies against la antigens in normal B lymphocytes. Further, cAMP analogues mediate the translocation of PKC to the nucleus of these cells. These findings suggest that in physiological situations, ligation of B-lymphocyte la molecules by helper T cells leads to increased cAMP production which in turn causes PKC translocation to the nucleus. In view of recent observations that antibodies against la antigens induce differentiation of B cells, we conclude that nuclear PKC may function in the regulation of gene expression.
- Publication
Nature, 1987, Vol 327, Issue 6123, p629
- ISSN
0028-0836
- Publication type
Article
- DOI
10.1038/327629a0