Affiliation:
1. From the Department of Microbiology and Immunology, School of Medicine, the Lineberger Comprehensive Cancer Center, and the Curriculum in Oral Biology, University of North Carolina at Chapel Hill.
Abstract
AbstractInterleukin-10 (IL-10) has potent immunoregulatory effects on the maturation and the antigen-presenting cell (APC) function of dendritic cells (DCs). The molecular basis underlying these effects in DCs, however, is ill defined. It is well established that the transcription factor NF-κB is a key regulator of DC development, maturation, and APC function. This study was initiated to determine the effects of IL-10 on the NF-κB signaling pathway in immature DCs. IL-10 pretreatment of myeloid DCs cultured from bone marrow resulted in reduced DNA binding and nuclear translocation of NF-κB after anti-CD40 antibody or lipopolysaccharide (LPS) stimulation. Furthermore, inhibited NF-κB activation was characterized by reduced degradation, phosphorylation, or both of IκBα and IκBϵ but not IκBβ and by reduced phosphorylation of Ser536, located in the trans-activation domain of p65. Notably, IL-10–mediated inhibition of NF-κB coincided with suppressed IκB kinase (IKK) activity in vitro. Furthermore, IL-10 blocked inducible Akt phosphorylation, and inhibitors of phosphatidylinositol 3-kinase (PI3K) effectively suppressed the activation of Akt, IKK, and NF-κB. These findings demonstrate that IL-10 targets IKK activation in immature DCs and that suppressing the PI3K pathway in part mediates blockade of the pathway.
Publisher
American Society of Hematology
Subject
Cell Biology,Hematology,Immunology,Biochemistry
Reference58 articles.
1. Banchereau J, Steinman RM. Dendritic cells and the control of immunity. Nature. 1998;392: 245-252.
2. Moser M. Dendritic cells in immunity and tolerance—do they display opposite functions? Immunity. 2003;19: 5-8.
3. Enk AH, Angeloni VL, Udey MC, Katz SI. Inhibition of Langerhans cell antigen-presenting function by IL-10. J Immunol. 1993;151: 2390-2398.
4. De Smedt T, Van Mechelen M, De Becker G, Urbain J, Leo O, Moser M. Effect of interleukin-10 on dendritic cell maturation and function. Eur J Immunol. 1997;27: 1229-1235.
5. Steinbrink K, Wolfl M, Jonuleit H, Knop J, Enk AH. Induction of tolerance by IL-10 treated dendritic cells. J Immunol. 1997;159: 4772-4780.
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