Cross-presentation of antigen by diverse subsets of murine liver cells

Mohammad R. Ebrahimkhani, Isaac Mohar, Ian N. Crispe

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

Antigen cross-presentation is a principal function of specialized antigen-presenting cells of bone marrow origin such as dendritic cells. Although these cells are sometimes known as "professional" antigen-presenting cells, nonbone marrow-derived cells may also act as antigen-presenting cells. Here, using four-way liver cell isolation and parallel comparison of candidate antigen-presenting cells, we show that, depending on the abundance of antigen-donor cells, different subsets of liver cells could cross-present a hepatocyte-associated antigen. This function was observed in both liver sinusoidal endothelial cells and Kupffer cells even at very low antigen concentration, as well as when using soluble protein. Antigen cross-presentation by liver cells induced efficient CD8+ T-cell proliferation in a similar manner to classical dendritic cells from spleen. However, proliferated cells expressed a lower level of T-cell activation markers and intracellular interferon-gamma levels. In contrast to classical spleen dendritic cells, cross-presentation by liver antigen-presenting cells was predominantly dependent on intercellular adhesion molecule-1. Conclusion: Hepatic sinusoids are an environment rich in antigen cross-presenting activity. However, the liver's resident antigen-presenting cells cause partial T-cell activation. These results clarify how the liver can act as a primary site of CD8+ T-cell activation, and why immunity against hepatocyte pathogens is sometimes ineffective.

Original languageEnglish (US)
Pages (from-to)1379-1387
Number of pages9
JournalHepatology
Volume54
Issue number4
DOIs
StatePublished - Oct 2011

ASJC Scopus subject areas

  • Hepatology

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    Ebrahimkhani, M. R., Mohar, I., & Crispe, I. N. (2011). Cross-presentation of antigen by diverse subsets of murine liver cells. Hepatology, 54(4), 1379-1387. https://doi.org/10.1002/hep.24508