Title : Protein tyrosine phosphorylation is mandatory for CD40-mediated rescue of germinal center B cells from apoptosis.

Pub. Date : 1993 Oct

PMID : 7691610






2 Functional Relationships(s)
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1 Cross-linking the surface CD40 of GC B cells with mAb consistently resulted in enhanced tyrosine phosphorylation on a number of distinct substrates: this process could be blocked, in a dose-dependent fashion, by pre-treating GC B cells with the selective protein tyrosine kinase(s) (PTK) inhibitor, herbimycin A. herbimycin protein tyrosine kinase 2 beta Homo sapiens
2 Pre-incubation with the PTK inhibitor herbimycin A (5 microM) abrogated anti-CD40-mediated rescue of GC B cells from apoptosis, while genistein (40 microM) and the tyrphostins AG490 (10 microM) and AG814 (25 microM) significantly inhibited this process. herbimycin protein tyrosine kinase 2 beta Homo sapiens