Activin A down-regulates the phagocytosis of lipopolysaccharide-activated mouse peritoneal macrophages in vitro and in vivo.

Abstract:

:Activin A is a multifunctional factor of the transforming growth factor-beta (TGF-beta) superfamily and acts as an anti-inflammatory cytokine produced by microglia and macrophages. In this study, we investigated the regulatory effect and possible mechanism of activin A on activation of lipopolysaccharide (LPS)-induced mouse peritoneal macrophages. The results showed that activin A could decrease NO release in LPS-activated mouse peritoneal macrophages, and suppressed phagocytosis and pinocytosis of mouse peritoneal macrophages stimulated by LPS in vitro and in vivo. Furthermore, activin A remarkably inhibited the expressions of CD14 and MHC II on LPS-induced mouse peritoneal macrophages, but had no significant effect on the expression of MHC I and the proliferation of mouse peritoneal macrophages. These findings suggest that activin A can down-regulate inflammatory mediator production and phagocytosis of LPS-activated macrophages via suppressing CD14 expression, and may influence the presentation of exogenous antigens via inhibiting MHC II expression. Thus, activin A might have the potential for treatment of macrophage-mediated inflammatory diseases through modulating both innate and adaptive immune responses.

journal_name

Cell Immunol

journal_title

Cellular immunology

authors

Zhou J,Tai G,Liu H,Ge J,Feng Y,Chen F,Yu F,Liu Z

doi

10.1016/j.cellimm.2008.11.001

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

69-75

issue

1-2

eissn

0008-8749

issn

1090-2163

pii

S0008-8749(08)00193-7

journal_volume

255

pub_type

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