期刊
ATHEROSCLEROSIS
卷 199, 期 2, 页码 257-264出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.atherosclerosis.2007.12.002
关键词
oxidized low-density lipoprotein; macrophage; dendritic cell; atherosclerosis
资金
- National Natural Science Foundation [30670880, 30600242]
- Shanghai Municipal Natural Science Foundation [05JC14037, B 14047]
Dendtritic cells (DCs) are potent antigen-presenting cells and have an important role in the pathogenesis of atherosclerosis. Recent data suggests oxidized low-density lipoprotein (oxLDL) promotes the transition of a differentiating monocyte to a mature dendritic cell. In this study, we examined whether oxLDL could induce the differentiation of mature macrophages into DCs. After 48 h treatment with oxLDL. RAW264.7 cells increased in cell size and exhibited dendritic morphology. At the optimal oxLDL dose (10 mu g/ml), approximately 74% of RAW264.7 cells differentiated into dendritic-like cells. Flow cytometric analysis detected dendritic cell surface markers (CD83, CD40, CD86. MHC Class II, and CD1d), and their expression increased in a dose- and time-dependent manner. Moreover, oxLDL-treated RAW264.7 cells showed functional changes including reduced endocytic activity, increased allostimulatory activity, and IL-12 production. The findings of the present work demonstrate that RAW264.7 cells, incubated with oxLDL, acquire some dendritic cell features. (C) 2007 Elsevier Ireland Ltd. All rights reserved.
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