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• W2083132841 abstract "Background This study was aimed to assess the pleiotropic effects of non-hematopoietic doses of erythropoietin (Epo) on post-ischemic microcirculatory dysfunction and inflammation in murine cardiac allografts. Methods Epo was given intraperitoneally 2 hours prior to explantation (Epo-donor) or 2 hours prior to the onset of reperfusion (Epo-recipient). Controls were not treated. Intravital fluorescence microscopy (IVM) was used to assess post-ischemic coronary microcirculatory dysfunction. Results IVM exhibited decreasing capillary blood flow velocities and functional capillary densities (FCD) in controls. Capillary diameters and venular blood flow characteristics showed no significant changes over time. Epo-treatment had no effect on coronary microhemodynamics. Post-ischemic inflammation was characterized by augmented macromolecular leakage. Microvascular permeability decreased in the Epo-donor group (p < 0.05). Leukocyte rolling in coronary post-capillary venules decreased during reperfusion from 64 ± 16 to 19 ± 16 cells/min/mm, whereas firm adhesion increased from 333 ± 135 to 479 ± 154 cells/mm2 in controls. Capillary leukocyte plugging remained stationary over time with approximately 4 to 6 cells/HPF. Firm adhesion was inhibited in the Epo-recipient group, resulting in 84 ± 34 cells/mm2 at 6 hours of reperfusion (p < 0.05). Capillary leukocyte plugging was also reduced in the Epo-recipient group (p < 0.05). Epo exerted no effect on leukocyte rolling. Histology revealed significant myocardial edema formation in allografts, without any alteration by Epo treatment. Immunohistochemistry indicated the involvement of resident cardiac mast cells. Allograft rejection was not affected by Epo treatment. Conclusions We demonstrate that non-hematopoietic treatment with Epo inhibits acute post-ischemic myocardial leukocyte sequestration, without affecting microcirculatory dysfunction and allograft rejection. This study was aimed to assess the pleiotropic effects of non-hematopoietic doses of erythropoietin (Epo) on post-ischemic microcirculatory dysfunction and inflammation in murine cardiac allografts. Epo was given intraperitoneally 2 hours prior to explantation (Epo-donor) or 2 hours prior to the onset of reperfusion (Epo-recipient). Controls were not treated. Intravital fluorescence microscopy (IVM) was used to assess post-ischemic coronary microcirculatory dysfunction. IVM exhibited decreasing capillary blood flow velocities and functional capillary densities (FCD) in controls. Capillary diameters and venular blood flow characteristics showed no significant changes over time. Epo-treatment had no effect on coronary microhemodynamics. Post-ischemic inflammation was characterized by augmented macromolecular leakage. Microvascular permeability decreased in the Epo-donor group (p < 0.05). Leukocyte rolling in coronary post-capillary venules decreased during reperfusion from 64 ± 16 to 19 ± 16 cells/min/mm, whereas firm adhesion increased from 333 ± 135 to 479 ± 154 cells/mm2 in controls. Capillary leukocyte plugging remained stationary over time with approximately 4 to 6 cells/HPF. Firm adhesion was inhibited in the Epo-recipient group, resulting in 84 ± 34 cells/mm2 at 6 hours of reperfusion (p < 0.05). Capillary leukocyte plugging was also reduced in the Epo-recipient group (p < 0.05). Epo exerted no effect on leukocyte rolling. Histology revealed significant myocardial edema formation in allografts, without any alteration by Epo treatment. Immunohistochemistry indicated the involvement of resident cardiac mast cells. Allograft rejection was not affected by Epo treatment. We demonstrate that non-hematopoietic treatment with Epo inhibits acute post-ischemic myocardial leukocyte sequestration, without affecting microcirculatory dysfunction and allograft rejection." @default.
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• W2083132841 date "2010-10-01" @default.
• W2083132841 modified "2023-09-23" @default.
• W2083132841 title "Erythropoietin inhibits post-ischemic leukocyte adhesion but does not affect rejection in murine cardiac allografts" @default.
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• W2083132841 doi "https://doi.org/10.1016/j.healun.2010.05.035" @default.
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