Opposing regulation of B cell receptor‐induced activation of mitogen‐activated protein kinases by CD45
Open Access
- 9 February 2001
- journal article
- Published by Wiley in FEBS Letters
- Vol. 490 (1-2) , 97-101
Abstract
In this study, we examined the contribution made by CD45 to B cell antigen receptor (BCR)‐induced activation of mitogen‐activated protein kinase (MAPK) family members. We found that CD45 negatively regulated BCR‐induced c‐Jun NH2‐terminal kinase (JNK) and p38 activation in immature WEHI‐231 cells, whereas in mature BAL‐17 cells, CD45 positively regulated JNK and p38 activation and negatively regulated extracellular signal‐regulated kinase activity. Furthermore, cooperative action of JNK and p38 dictated BCR‐induced inhibition of growth. Thus, CD45 appears to differentially regulate BCR‐induced activation of MAPK members, and can exert opposing effects on JNK and p38 in different cellular milieu, controlling the B cell fate.Keywords
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