Antigen presentation by monocytes and monocyte-derived cells

Gwendalyn J. Randolph, Claudia Jakubzick, Chunfeng Qu

Research output: Contribution to journalReview article

136 Scopus citations

Abstract

Monocytes are circulating mononuclear phagocytes with a fundamental capacity to differentiate into macrophages. This differentiation can, in the presence of the right environmental cues, be re-directed instead to dendritic cells (DCs). Recent advances have been made in understanding the role of monocytes and their derivatives in presenting antigen to drive immune responses, and we review this topic herein. We briefly discuss the heterogeneity of monocytes in the blood and subsequently raise the possibility that one of the major monocyte phenotypes in the blood corresponds with a population of 'blood DCs' previously proposed to drive T-independent antibody reactions in the spleen. Then we evaluate the role of monocytes in T-dependent immunity, considering their role in acquiring antigens for presentation before exiting the bloodstream and their ability to differentiate into macrophages versus antigen-presenting DCs. Finally, we review recent literature on the role of monocyte-derived cells in cross-presentation and discuss the possibility that monocyte-derived cells participate critically in processing antigen for cross-priming, even if they do not present that antigen to T cells themselves.

Original languageEnglish
Pages (from-to)52-60
Number of pages9
JournalCurrent Opinion in Immunology
Volume20
Issue number1
DOIs
StatePublished - Feb 1 2008
Externally publishedYes

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