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- W2086550669 abstract "The mechanisms mediating leukocyte recruitment into the cerebral nervous system during inflammation are still poorly understood. The objective of this study was to investigate the leukocyte recruitment in the brain microcirculation by intravital microscopy. Superfusion of the brain with artificial cerebrospinal fluid did not induce leukocyte rolling or adhesion. However, intraperitoneal tumor necrosis factor-alpha (TNF-alpha) caused marked leukocyte rolling and adhesion in the brain microcirculation. Histology revealed that the recruitment was primarily of neutrophils. Both E- and P-selectin were required for TNF-alpha-induced leukocyte recruitment, as rolling was reduced after treatment with either anti-E- or anti-P-selectin antibody and eliminated in E- or P-selectin-deficient mice. A significant increase in brain P- and E-selectin expression was seen after TNF-alpha treatment, but both were an order of magnitude less than in any other tissue. We observed significant platelet paving of TNF-alpha-stimulated endothelium and found that anti-platelet antibody reduced leukocyte rolling and adhesion, as did acetylsalicylic acid (aspirin). However, depletion of platelets did not reduce cerebral P-selectin expression. Moreover, chimeric mice lacking P-selectin on endothelium but not platelets had significantly decreased P-selectin expression and reduced leukocyte recruitment in the brain. This suggests a role for endothelial P-selectin in cerebral leukocyte recruitment. In conclusion, TNF-alpha-induced neutrophil recruitment into the brain requires both endothelial E-selectin and P-selectin as well as platelets, but platelet P-selectin was not a major contributor to this process." @default.
- W2086550669 created "2016-06-24" @default.
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- W2086550669 date "2000-12-08" @default.
- W2086550669 modified "2023-10-11" @default.
- W2086550669 title "A Role for Platelets and Endothelial Selectins in Tumor Necrosis Factor-α–Induced Leukocyte Recruitment in the Brain Microvasculature" @default.
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- W2086550669 doi "https://doi.org/10.1161/01.res.87.12.1141" @default.
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