Silibinin polarizes Th1/Th2 immune responses through the inhibition of immunostimulatory function of dendritic cells.

Abstract:

:Silibinin is the primary active compound in silymarin. It has been demonstrated to exert anti-carcinogenic effects and hepato-protective effects. However, the effects of silibinin on the maturation and immunostimulatory activities exhibited by dendritic cells (DCs) remain, for the most part, unknown. In this study, we have attempted to determine whether silibinin can influence surface molecule expression, dextran uptake, cytokine production, capacity to induce T-cell differentiation, and the signaling pathways underlying these phenomena in murine bone marrow-derived DCs. Silibinin was shown to significantly suppress the expression of CD80, CD86, MHC class I, and MHC class II in the DCs, and was also associated with impairments of LPS-induced IL-12 expression in the DCs. Silibinin-treated DCs proved highly efficient with regard to Ag capture via mannose receptor-mediated endocytosis. Silibinin also inhibited the LPS-induced activation of MAPKs and the nuclear translocation of the NF-kappaB p65 subunit. Additionally, silibinin-treated DCs evidenced an impaired induction of Th1 response, and a normal cell-mediated immune response. These findings provide new insight into the immunopharmacological functions of silibinin, especially with regard to their impact on the DCs. These findings expand our current understanding of the immunopharmacological functions of silibinin, and may prove useful in the development of therapeutic adjuvants for acute and chronic DC-associated diseases.

journal_name

J Cell Physiol

authors

Lee JS,Kim SG,Kim HK,Lee TH,Jeong YI,Lee CM,Yoon MS,Na YJ,Suh DS,Park NC,Choi IH,Kim GY,Choi YH,Chung HY,Park YM

doi

10.1002/jcp.20852

subject

Has Abstract

pub_date

2007-02-01 00:00:00

pages

385-97

issue

2

eissn

0021-9541

issn

1097-4652

journal_volume

210

pub_type

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