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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Cell+Mol+Med 2011 ; 15 (5): 1189-99 Nephropedia Template TP
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Identification of a novel antigen cross-presenting cell type in spleen #MMPMID20477902
Tan JKH; Quah BJC; Griffiths KL; Periasamy P; Hey YY; O?Neill HC
J Cell Mol Med 2011[May]; 15 (5): 1189-99 PMID20477902show ga
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?? 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.