THE ADHESION MOLECULES USED BY MONOCYTES FOR MIGRATION ACROSS ENDOTHELIUM INCLUDE CD11A/CD18, CD11B/CD18, AND VLA-4 ON MONOCYTES AND ICAM-1, VCAM-1, AND OTHER LIGANDS ON ENDOTHELIUM

被引:0
|
作者
MEERSCHAERT, J
FURIE, MB
机构
[1] SUNY STONY BROOK,SCH MED,DEPT PATHOL,STONY BROOK,NY 11794
[2] SUNY STONY BROOK,SCH MED,PROGRAM MOLEC & CELLULAR BIOL,STONY BROOK,NY 11794
来源
JOURNAL OF IMMUNOLOGY | 1995年 / 154卷 / 08期
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暂无
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
CD11/CD18 and VLA-4 integrins mediate interactions of monocytes with HUVEC cultured on human amniotic tissue. In the present study, the roles of individual CD11/CD18 integrins and endothelia[ adhesion molecules were examined using blocking mAbs and peptides. After 20 min of incubation, monocyte adhesion to and migration across unstimulated endothelium was dependent primarily on CD11a/CD18. When incubation was extended to 2 h to allow for completion of migration, either CD11a/CD18 or CD11b/CD18 could be used. Similarly, either CD11a/CD18 or CD11b/CD18 could be used by monocytes to bind to and traverse IL-l P-stimulated endothelium. Although both CD11a/CD18 and CD11b/CD18 are known to bind to ICAM-1, results of Ab-mixing experiments suggest that alternative ligands on HUVEC for CD11/CD18 integrins also may be used during transendothelial migration of monocytes. Our previous studies indicate that VLA-4 on monocytes interacts primarily with VCAM-1 on unstimulated endothelium. In contrast, migration of monocytes across IL-lp-stimulated endothelium was less dependent on VCAM-1. mAbs directed against binding sites for VLA-4 in domain 1 and domain 4 of VCAM-1 did not, by themselves, inhibit interactions of monocytes with stimulated HUVEC. VLA-4-dependent migration across IL-lp-stimulated endothelium was markedly inhibited only when mAbs to VCAM-1 were added in combination with peptides of fibronectin. Therefore, VLA-4 can interact with either VCAM-1 or alternative ligands on IL-1 beta-stimulated HUVEC-amnion cultures to mediate transendothelial migration of monocytes.
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页码:4099 / 4112
页数:14
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