期刊
JOURNAL OF CELLULAR AND MOLECULAR MEDICINE
卷 15, 期 5, 页码 1189-1199出版社
WILEY
DOI: 10.1111/j.1582-4934.2010.01089.x
关键词
dendritic cells; antigen presentation; spleen
资金
- National Health and Medical Research Council of Australia
- ANU
Antigen-presenting cells (APC), like dendritic cells (DC), are essential for T-cell activation, leading to immunity or tolerance. Multiple DC subsets each play a unique role in the immune response. Here, a novel splenic dendritic-like APC has been characterized in mice that has immune function and cell surface phenotype distinct from other, described DC subsets. These were identified as a cell type continuously produced in spleen long-term cultures (LTC) and have an in vivo equivalent cell type in mice, namely 'L-DC'. This study characterizes LTC-DC in terms of marker phenotype and function, and compares them with L-DC and other known splenic DC and myeloid subsets. L-DC display a myeloid dendritic-like phenotype equivalent to LTC-DC as CD11cloCD11bhiMHC-II-CD8 alpha- cells, distinct by high accessibility and endocytic capacity for blood-borne antigen. Both LTC-DC and L-DC have strong antigen cross-presentation ability leading to strong activation of CD8+ T cells, particularly after exposure to lipopolysaccharide. However, they have weak ability to stimulate CD4+ T cells in antigen-specific responses. Evidence is presented here for a novel DC type produced by in vitro haematopoiesis which has distinct antigen-presenting potential and reflects a DC subset present also in vivo in spleen.
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