Roles of cells in the liver in occurrence of liver dysfunction in vivo

本研究旨在阐明梗阻性黄疸对肝脏微循环和枯否细胞活性的影响。对C57 BL/6小鼠进行胆总管结扎以诱导阻塞性黄疸。术后1周、2周行肝活体显微镜检查，观察白细胞滚动、粘附及肝窦血流情况。还使用FITC标记的珠粒定量吞噬活性。胆管结扎后1周和2周白细胞滚动显著增加，达对照组的409.5%.肝窦血流量，评价为每个显微镜视野中含有血流量的血窦数量，与胆管结扎后吞噬活性增加显著相关。这些数据表明，阻塞性黄疸导致白细胞粘附和枯否细胞活性增加，这可能损害肝脏微循环，并使宿主容易发生肝功能衰竭。

The aim of this study was to clarify the effect of obstructive jaundice on hepatic microcirculation and Kupffer cell activities. Common bile duct ligation was performed on C57BL/6 mice to induce obstructive jaundice. One and 2 weeks after the operation, Leukocyte rolling and sticking, and hepatic sinusoidal blood flow were evaluated using hepatic intravital microscopy. Phagocytic activities were also quantitated using FITC-labeled beads. Leukocyte rolling increased significantly 1 and 2 weeks after bile duct ligation upto 409.5 % of control. Hepatic sinusoidal blood flow, evaluated as the number of sinusoids containing blood flow per microscopic field, decreased significantly associated with increased phagocytic activities after bile duct ligation. These data suggest that obstructive jaundice results in increased leukocyte adhesion and Kupffer cell activities, which may impair hepatic microcirculation, and make a host susceptible to hepatic failure.