Inhibition of IgG1 and IgE production by stimulation of the B cell CTLA-4 receptor

C. Pioli, L. Gatta, V. Ubaldi, G. Doria

Research output: Contribution to journalArticlepeer-review


Although a large amount of information is available on the activity of CTLA-4 in T cells, the role of this receptor in B cells has not been previously characterized. Our results show that CD40 or LPS stimulation in the presence of IL-4 induces CTLA-4 expression in purified B cells; the maximum level is reached in both membrane and intracellular compartments after 48-72 h. Engagement of the B cell CTLA-4 by immobilized mAb inhibits IgG1 and IgE production and reduces the frequency of IgG1- and IgE-expressing B cells. Cε and Cγ1 germline mRNA expression as well as NF-κB and STAT6 activation, events required for isotype switching, are also inhibited by CTLA-4 engagement. Together these findings show the critical role of CTLA-4 in the control of IL-4-driven isotype switching and suggest new approaches for modulating immediate-type hypersensitivity responses.

Original languageEnglish
Pages (from-to)5530-5536
Number of pages7
JournalJournal of Immunology
Issue number10
Publication statusPublished - Nov 15 2000

ASJC Scopus subject areas

  • Immunology


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