The function and regulation of immunoglobulin D

Kang Chen, Andrea Cerutti

Research output: Contribution to journalReview articlepeer-review

60 Scopus citations

Abstract

Recent discoveries of IgD in ancient vertebrates suggest that IgD has been preserved in evolution from fish to human for important immunological functions. A non-canonical form of class switching from IgM to IgD occurs in the human upper respiratory mucosa to generate IgD-secreting B cells that bind respiratory bacteria and their products. In addition to enhancing mucosal immunity, IgD class-switched B cells enter the circulation to 'arm' basophils and other innate immune cells with secreted IgD. Although the nature of the IgD receptor remains elusive, cross-linking of IgD on basophils stimulates release of immunoactivating, proinflammatory and antimicrobial mediators. This pathway is dysregulated in autoinflammatory disorders such as hyper-IgD syndrome, indicating that IgD orchestrates an ancestral surveillance system at the interface between immunity and inflammation.

Original languageEnglish
Pages (from-to)345-352
Number of pages8
JournalCurrent Opinion in Immunology
Volume23
Issue number3
DOIs
StatePublished - Jun 2011

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