CD40 employs p38 MAP kinase in IgE isotype switching
IgE switching requires the prior induction of CE germline transcripts which is mediated by the concerted binding of STAT-6 and NF kappaB to the CE promoter. These transcription factors are regulated by IL-4 and CD40, respectively. However the latter can effect other signaling pathways and the present study explores the role of p38 MAPK in induction of CE germline transcripts. CD40 and IL-4, both a