Expression and release of angiopoietin-1 from human neutrophils: intracellular mechanisms.

作者: Paul-Eduard Neagoe , Alexandre Brkovic , Fadi Hajjar , Martin G. Sirois

DOI: 10.3109/08977190903155043

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摘要: We recently demonstrated that Tie2 receptor activation on human neutrophils by both angiopoietins (Ang1 and Ang2) promoted platelet-activating factor synthesis, β2-integrin activation, cell migration. Herein, we wanted to assess if express further delineate their mechanisms of release. Employing Reverse transcriptase-polymerase chain reaction, Real time quantitative FACScan analysis ELISA approaches, observed Ang1 but not Ang2. For each condition, vascular endothelial growth (VEGF) detection was performed as positive control. Using nitrogen cavitation, is localized in the cytosolic fraction whereas VEGF found β-granules. Treatment with phorbol myristate acetate (PMA), N-Formyl-Met-Leu-Phe (fMLP) tumor necrosis factor-α (TNF-α) induced Maximal effect PMA (80 nM) stimulation inducing a complete release c...

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