Kupffer Cells Express Type I TGF-beta Receptors, Migrate to TGF-beta and Participate in Streptococcal Cell Wall Induced Hepatic Granuloma Formation

被引:12
作者
Kossman, Thomas [1 ]
Manthey, Carl L. [1 ]
Brandes, Mary E. [1 ]
Morganti-Kossmann, Maria C. [1 ]
Ohura, Kiyoshi [1 ]
Allen, Janice B. [1 ]
Mergenhagen, Sttephan E. [1 ]
Wahl, Sharon M. [1 ]
机构
[1] NIDR, Cellular Immunol Sect, Lab Immunol, NIH, Bethesda, MD 20892 USA
关键词
Kupffer cell; inflammation; liver; chemotaxis; granuloma;
D O I
10.3109/08977199209023939
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Intraperitoneal injection of Group A streptococcal cell wall (SCW) fragments into female Lewis rats results in the induction of an acute hepatic inflammation that progresses to granulomatous lesions. Kupffer cells have been shown to rapidly clear circulating SCW which triggers production of TGE-beta. In this study, we examined Kupffer cells for the expression of TGF-beta receptors to determine if these cells might be modulated in an autocrine/paracrine fashion by TGE-beta during SCW-hepatic inflammation. By receptor crosslinking and subsequent SDS-PAGE analysis we demonstrate that Kupffer cells express Type I TGE-beta receptors, but not Types II and III. Scatchard analysis indicated a receptor density of approximately 1100 receptors per cell. Functionally, TGF-beta was found to be chemotactic for Kupffer cells in vitro and this chemotactic response was higher in cells isolated from rats 1-21 days post SCW-injection. Although TGE-beta 1 mRNA is constitutively expressed by Kupffer cells, in vitro stimulation of the cultures with purified TGF-beta augments the expression of TGE-beta 1 mRNA and protein synthesis suggesting autocrine/paracrine regulation. These results indicate that TGF beta secreted by Kupffer cells during SCW-induced hepatic inflammation may amplify its own expression and regulate Kupffer cell functions relevant to the formation of granulomatous lesions within the liver.
引用
收藏
页码:73 / 83
页数:11
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