TNF-alpha induces selectin-mediated leukocyte rolling in mouse cremaster muscle arterioles

被引:57
作者
Kunkel, EJ [1 ]
Jung, US [1 ]
Ley, K [1 ]
机构
[1] UNIV VIRGINIA, SCH MED, DEPT BIOMED ENGN, CHARLOTTESVILLE, VA 22908 USA
来源
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY | 1997年 / 272卷 / 03期
关键词
tumor necrosis factor-alpha; microcirculation; inflammation; shear rate; in vivo;
D O I
10.1152/ajpheart.1997.272.3.H1391
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Leukocyte rolling is commonly restricted to venules and mediated by selectins expressed both on leukocytes (L-selectin) and the vascular endothelium (P- and E-selectin). We show here that 2- to 3-h tumor necrosis factor-alpha (TNF-alpha) stimulation of the mouse cremaster muscle induces rolling in arterioles (diameters 30-70 mu m; wall shear rates 225-1,770 s(-1)). Weak P-selectin expression was detected on arteriolar endothelium of TNF-alpha-stimulated cremaster muscles. No rolling was observed in arterioles smaller than 30 mu m (wall shear rates 1,500-3,250 s(-1)). The arteriolar rolling flux fraction in wild-type mice averaged similar to 5% and rolling was blocked by the P-selectin monoclonal antibody (MAb) RB40.34. Rolling in L- and E-selectin deficient mice was similar to that in wild-type mice and was also blocked by the MAb RB40.34. Rolling was completely absent in arterioles of P-selectin-deficient mice. The average rolling velocity in arterioles of wild-type and L-selectin-deficient mice was similar to 50 mu m/s but increased to similar to 110 mu m/s in E-selectin-deficient mice and after injection of the blocking E-selectin MAb 9A9 in wild-type mice. We conclude that TNF-alpha treatment induces P-selectin-dependent rolling in arterioles that requires E-selectin for rolling at normal velocities.
引用
收藏
页码:H1391 / H1400
页数:10
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