Lectin-like cell adhesion molecule 1 mediates leukocyte rolling in mesenteric venules in vivo.

Abstract:

:During the inflammatory response, granulocytes and other leukocytes adhere to and emigrate from small venules. Before firm attachment, leukocytes are observed rolling slowly along the endothelium in venules of most tissues accessible to intravital microscopy. The molecular mechanism underlying this early type of leukocyte-endothelial interaction is unknown. Leukocyte rolling was investigated in venules (diameter, 40 microns) of the exposed rat mesentery. Micro-infusion of a recombinant soluble chimera (LEC-IgG) of the murine homing receptor lectin-like cell adhesion molecule 1 (LEC-CAM 1; gp90MEL) into individual venules reduced the number of rolling leukocytes by 89% +/- 2% (mean +/- SEM, n = 20 venules), while a similar CD4 chimera (CD4-IgG) had no effect (inhibition 14% +/- 7%, n = 25). Rolling was also greatly reduced by a polyclonal serum against LEC-CAM 1 (inhibition 84% +/- 3%, n = 35); preimmune serum was ineffective (11% +/- 13% inhibition, n = 28). These findings indicate that LEC-CAM 1 mediates the adhesive interaction underlying leukocyte rolling and thus may play an important role in inflammation and in pathologic conditions involving leukocytes.

journal_name

Blood

journal_title

Blood

authors

Ley K,Gaehtgens P,Fennie C,Singer MS,Lasky LA,Rosen SD

subject

Has Abstract

pub_date

1991-06-15 00:00:00

pages

2553-5

issue

12

eissn

0006-4971

issn

1528-0020

journal_volume

77

pub_type

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