Linked Life Data

12200635

Source:http://linkedlifedata.com/resource/pubmed/id/12200635

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2002-8-29
pubmed:abstractText
Neutrophil adhesion to coronary endothelium is a key event for cardiac reperfusion injury. Adhesion is proposed to be a multi-step event, consisting of selectin-mediated rolling, chemotactic activation, and subsequent integrin-mediated firm attachment. However, it is not clear whether this sequence also occurs in the coronary circulation with its unique hemodynamic properties (turbulent flow, flow reversal). We have studied neutrophil adhesion in the coronary system of isolated perfused guinea pig hearts under basal and reperfusion conditions (15 min global ischemia). Adhesion was manipulated by an anti-CD18 antibody (blocking firm adhesion) and fucoidin (reducing rolling). Neutrophil behavior during coronary passage was assessed by measurement of CD11b expression, forward scatter (FSC, indicating polarization), and sideward scatter (SSC, measure for granularity) via flow cytometry. Adhesion rose from 21 % (basal) to 35 % after ischemia. Anti-CD18 decreased adhesion to 11 % and 14 %, respectively; fucoidin altered only the postischemic increase (23 %). CD11b was unchanged by passage through the non-ischemic coronaries, but rose postischemically (139 % increase). CD18 blockade did not reduce the postischemic rise of CD11b, while fucoidin was inhibitory (24 % increase). FSC did not differ between controls and ischemic hearts in any group, while SSC decreased most in postischemic hearts after CD18 blockade. Blockade of rolling and of firm attachment both reduce neutrophil retention, while only inhibition of rolling reduces intracoronary activation. Thus, rolling seems to be mandatory for endothelial-leukocyte communication in the coronary system.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0300-8428
pubmed:author
pubmed:issnType
Print
pubmed:volume
97
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
359-64
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Selectin-mediated rolling of neutrophils is essential for their activation and retention in the reperfused coronary system.
pubmed:affiliation
Department of Physiology, Ludwig Maximilians University, Schillerstr 44, 80336 Munich, Germany. s.zahler@lrz.uni-muenchen.de
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't