Nohé B, Johannes T, Schmidt V, Schroeder TH, Kiefer RT, Unertl K, Dieterich HJ. Einfluss verminderter Scherkräfte auf Entzündungsreaktionen in vitro.
Anaesthesist 2005;
54:773-80. [PMID:
15870990 DOI:
10.1007/s00101-005-0852-z]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND
During malperfusion and inflammation leukocyte adhesion is common. The purpose of this study was to examine the effects of reduced shear stress on leukocyte-endothelial interactions and subsequent inflammatory reactions such as up-regulation of tissue factor.
METHODS
Isolated neutrophils and monocytes were co-incubated with human umbilical venous endothelium at 0-3 dynes/cm(2) in a flow chamber. Adhesion and tissue factor expression on adherent leukocytes were examined at various flow conditions.
RESULTS
At 2-3 dynes/cm(2) adhesion occurred only on TNFalpha-activated endothelium. Below 1 dyne/cm(2) similarly increased adhesion was also observed on non-activated endothelium. As was observed for leukocyte adhesion, these shear stress-dependent cell interactions also resulted in an up-regulation of tissue factor on adherent monocytes from non-activated co-cultures.
CONCLUSION
Apart from additional activators of inflammation, reduced shear forces may directly contribute to inflammation.
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