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B Induction
By
From the Scripps Research Institute, Department of Immunology, La Jolla, California 92037
Epstein-Barr virus (EBV), an oncogenic human herpesvirus, binds to and infects normal human
B lymphocytes via CD21, the CR2 complement receptor. Studies of the mechanisms that enable EBV to infect nonactivated, noncycling B cells provide compelling evidence for a sequence of events in which EBV binding to CD21 on purified resting human B cells rapidly activates the NF-
B transcription factor, which, in turn, binds to and mediates transcriptional activation of Wp, the initial viral latent gene promoter. Thus, EBV binding to its cellular receptor on resting B cells triggers an NF-
B-dependent intracellular signaling pathway which is
required for infection.
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