Linked Life Data

1934331

Source:http://linkedlifedata.com/resource/pubmed/id/1934331

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1991-11-29
pubmed:abstractText
At the onset of the inflammatory process, leukocytes roll along venular but not arteriolar walls before they firmly attach and emigrate. To test whether differences in hydrodynamic flow conditions are responsible for the preferential occurrence of leukocyte rolling in venules, we varied wall shear rate, gamma w, between 30 and 2,000 sec-1 by selective micro-occlusion of side branches in venules and arterioles (diameter, 20-37 microns) of the exposed mesentery of anesthetized rats. In venules, 39% (range, 6-77%) of all passing leukocytes were found interacting with the endothelium (rolling), whereas this fraction was only 0.6% in arterioles. The fraction of rolling leukocytes in venules decreased from 49 +/- 13% at gamma w less than 100 sec-1 (N = 12) to 24 +/- 13% at gamma w greater than 400 sec-1 (N = 12). Mean leukocyte rolling velocity in venules increased with gamma w, but the most frequent rolling velocity class was 20-40 microns/sec at all shear rates. In arterioles, even prolonged (up to 90 minutes) conditions of reduced flow (gamma w less than 150 sec-1) did not induce leukocyte rolling. Radial distribution of freely flowing leukocytes not different in arterioles and venules. The data indicate that hemodynamic factors are not responsible for the difference of leukocyte adhesion between arterioles and venules. The venular endothelium appears to be specialized to support leukocyte adhesion during inflammation. This finding correlates with reports on preferential expression of various endothelial-leukocyte adhesion molecules on venular endothelial cells.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0009-7330
pubmed:author
pubmed:issnType
Print
pubmed:volume
69
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1034-41
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1991
pubmed:articleTitle
Endothelial, not hemodynamic, differences are responsible for preferential leukocyte rolling in rat mesenteric venules.
pubmed:affiliation
Freie Universität Berlin, Department of Physiology, FRG.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't