Published in:
Open Access
01-01-2004 | Proceedings
Beta2-glycoprotein I inhibition of mouse Kupffer cells respiratory burst depends on liver architecture
Authors:
Ligia F Gomes, Paula R Knox, Karin A Simon-Giavarotti, Virginia BC Junqueira, Jorge Sans, Luis A Videla
Published in:
Comparative Hepatology
|
Special Issue 1/2004
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Excerpt
Kupffer cells play important roles in the modulation of immune response, phagocytosis, and senescent cell removal [
1,
2]. Hydrolytic enzymes and reactive species produce the killing effects of Kupffer cells and some degree of adjacent tissue damage [
1,
3]. Liver macrophages are constantly exposed to antigens from portal circulation, to which development of full inflammatory response is useless and potentially harmful [
4]. Neither tissue damage nor inflammation follows senescent cell removal by Kupffer cells, due to the physiological control of inflammation events during antigen processing [
2,
5]. Apolipoproteins can modulate macrophage function [
6]. Among them, beta
2-glycoprotein I (beta
2GPI) decreases Kupffer cells respiratory burst while increases efficiency of
C. albicans killing [
7]. Beta
2GPI also binds phosphatidylserine (PS) residues on the surface of senescent cells, targeting them to clearance [
8]. In order to get an insight on the role of beta
2GPI in the silent antigen removal by Kupffer cells, perfused mouse liver was used as a model of Kupffer cell-dependent phagocytosis and related respiratory burst activity, and results were correlated with those obtained in isolated mouse non-parenchymal cells. …