期刊
JOURNAL OF IMMUNOLOGY
卷 188, 期 10, 页码 4759-4768出版社
AMER ASSOC IMMUNOLOGISTS
DOI: 10.4049/jimmunol.1102754
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类别
资金
- National Institutes of Health/National Institute of Allergy and Infectious Diseases [R21AI088363, R01AI091797]
- Department of Surgery at the University of Missouri
- University of Missouri Research Board
Sphingosine analogues display immunosuppressive activities and thus have therapeutic potential in the treatment of autoimmune diseases. In this study, we investigated the effects of the sphingosine analogue AAL-R (FTY720 derivative) on dendritic cell (DC) response upon TLR stimulation. Unlike its known immunosuppressive activity, AAL-R increased TLR7-mediated DC responses by elevating the levels of MHC class I and costimulatory molecules and type I IFN expression and by enhancing the capacity of DCs to induce CD84(+) T cell proliferation. Importantly, the stimulatory activity of AAL-R was dependent on type I IFN signaling, as type I IFN receptor-deficient DCs failed to respond to AAL-R. Also, AAL-R activated p38 MAPK to increase type I IFN synthesis and TLR7-mediated DC maturation. These findings enhance our understanding of sphingosine regulation of the host immune system, in particular upon pathogenic infections. The Journal of Immunology, 2012, 188: 4759-4768.
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