Hes-1-targeting siRNA inhibits the maturation of murine myeloid-derived dendritic cells

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Abstract

Activation of Notch by Jagged-1 may plays a pivotal role in maturation of dendritic cells (DCs), but the mechanism has not been completely defined. In the present study, Hes-1 (Hairy/enhancer-of-split)-targeting siRNA was used to confirm a role of Jagged-1-Notch signaling pathway activation in maturation of murine bone marrow-derived DCs and to search for a target that plays a critical role. The results showed that compared with the control, lipopolysaccharide or Zymosan A groups, Jagged-1 (a soluble Jagged 1/Fc chimera protein) effectively increased expression of Hes-1 and Deltex-1 mRNA, which could be reversed by DAPT (2, 4-diamino-5-phenylthiazole), a specific inhibitor of the Notch signaling pathway. Hes-1-targeting siRNA could successfully down-regulate the endogenous Hes-1 expression in the DCs. Concurrently, a significant down-regulation of CD40, CD80, CD86 and MHC-II expressions on the surface of the DCs was found with the reduction of IL-12 yielded by the DCs. Our results demonstrate that Hes-1-targeting siRNA can inhibit the maturation of the DCs induced by Jagged-1, indicating Hes-1 may be an important target of Notch signaling mediating the maturation of DCs. © 2013 Versita Warsaw and Springer-Verlag Wien.

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Chen, G., Yu, C., Xing, F., You, P., Di, J., Zeng, S., & Liu, J. (2013). Hes-1-targeting siRNA inhibits the maturation of murine myeloid-derived dendritic cells. Central European Journal of Biology, 8(11), 1102–1111. https://doi.org/10.2478/s11535-013-0231-8

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