Abstract:
:The adhesion of highly activated neutrophils to cerebral microvascular endothelial cells (MVECs) may contribute to disruption and hyperpermeability of the blood-brain barrier (BBB) after cardiac surgery with prolonged cardiopulmonary bypass (CPB). A correlation between CPB duration and neutrophil-mediated BBB damage has not been investigated on the cellular level yet. Therefore, we studied the effects of neutrophils from cardiac surgery patients with CPB time <80 min (group I; n=8) and >80 min (group II; n=8) on the integrity of cultured porcine MVEC. Ex vivo, neutrophils of group II but not of group I significantly degraded the zonula adherens molecule beta-catenin whereas VE-cadherin and occludin were not modified. The transendothelial electric resistance as a measure for the integrity of the endothelial monolayers was reduced over time in both groups. In conclusion, prolonged CPB time entails neutrophil-mediated decrease in MVEC beta-catenin expression, and thus may be an important trigger for BBB disruption.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Schuller AM,Windolf J,Blaheta R,Cinatl J,Kreuter J,Wimmer-Greinecker G,Moritz A,Scholz Mdoi
10.1016/j.bbrc.2005.02.019subject
Has Abstractpub_date
2005-04-08 00:00:00pages
616-23issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(05)00250-0journal_volume
329pub_type
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