Abstract:
:The bone and immune systems are closely related through cellular and molecular interactions. Because bone-resorbing osteoclasts (OCs) are derived from the monocyte/macrophage lineage, similar to dendritic cells (DCs), we hypothesized that OCs could serve as antigen-presenting cells (APCs) to activate T cells. In this study, OCs were generated from human monocytes with stimulation by receptor activator of nuclear factor kappaB ligand (RANKL) and macrophage colony-stimulating factor (M-CSF). Results showed that, similar to DCs, OCs express major histocompatibility complex (MHC) classes I and II, and CD80, CD86, and CD40; and uptake soluble antigens. OCs secrete interleukin-10 (IL-10), transforming growth factor-beta (TGF-beta), IL-6, and tumor necrosis factor-alpha (TNF-alpha), but not IL-12p70. OCs present allogeneic antigens and activate both CD4+ and CD8+ alloreactive T cells in an MHC-restricted fashion. OCs also present soluble protein tetanus toxoid to activate autologous CD4+ T cells. These findings indicate that OCs can function as APCs and activate both CD4+ and CD8+ T cells. Thus, our study provides new insight into the effect of OCs on the immune system and may help develop novel strategies for treating diseases such as rheumatoid arthritis and multiple myeloma, which affect both the bone and immune systems.
journal_name
Bloodjournal_title
Bloodauthors
Li H,Hong S,Qian J,Zheng Y,Yang J,Yi Qdoi
10.1182/blood-2009-11-255026subject
Has Abstractpub_date
2010-07-15 00:00:00pages
210-7issue
2eissn
0006-4971issn
1528-0020pii
blood-2009-11-255026journal_volume
116pub_type
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