Objective To observe the protective effects of unfractionated heparin (UFH) on high-mobility group box-1 protein (HMGB1) induced increased permeability of endothelial cells, and investigate the protective mechanism of UFH on HMGB1 induced defective expression of zonula occludens-1 (ZO-1). Methods Human umbilical vascular endothelial cells (HUVECs) were culturedin vitro and divided into 4 groups (n=5), namely a control group, a HMGB1 group (100 ng/ml), a heparin group (UFH 10 U/ml), a HMGB1/heparin group (100 ng/ml HMGB1 + UFH 10 U/ml). Endothelial cell viability was measured by methyl thiazolyl tetrazolium (MTT) colorimetric method. Endothelial permeability was determination by Transwell chamber method. Immunofluorescence and laser confocal microscopy were used to assess the distribution of ZO-1. The protein expressions of tight junction protein ZO-1 and nuclear factor kappa B (NF-κB) were detected by Western blot. Results HMGB1 (100 ng/ml) had no inhibitory effect on endothelial cell viability (P＞0.05). UFH pretreatment could reduce the permeability increment of endothelial cells induced by HMGB1. UFH pretreatment could reduce the close loop reduction and damage of ZO-1 induced by HMGB1, enhance the fluorescence intensity and expression of ZO-1, and decrease the NF-κB translocation. Conclusions UFH can protect HMGB1-mediated defect of ZO-1 expression and increased permeability of the endothelial cells. The mechanism may be related to the decreased nuclear translocation of NF-κB.
目的 探讨腹腔镜胆囊切除术（laparoscopic cholecystectomy，LC）中不同CO2气腹压力对患者肝功能、动脉血气及对颈、肩痛的影响。方法 选择行择期LC术患者120例，采用随机数字表法，按住院先后顺序对应入组，随机均分为气腹压力10mmHg （1 mm Hg=0.133kPa）组、12mmHg组及14mmHg组3组；对比分析3组患者手术后肝功能、血气指标以及术后当天、第1和第2天恶心、呕吐及颈肩部疼痛的发生率。结果 3组患者术前各参数组间比较差异均无统计学意义（P＞0.05）。术后肝功能及血气分析指标的改变3组间的差异有统计学意义（P＜0.05），气腹压力越大，其术后AST、ALT及TBIL水平升高越明显，而pH及PO2的下降越明显，PCO2的升高也越明显；术后患者颈、肩痛及恶心呕吐发生率3组间比较差异也有统计学意义（P＜0.05），气腹压力越大，术后颈、肩痛及恶心呕吐发生率越高。结论 CO2气腹压力对术后肝功能及动脉血气指标的改变以及术后颈、肩痛和恶心呕吐发生率有明显影响。
目的总结困难腹腔镜胆囊切除术（LC）中造成操作困难的原因，探讨各种情况下的手术技巧。 方法回顾性分析2004年12月至2013年12月期间我院为128例LC术中遇有操作困难的患者施行手术的临床资料。 结果128例患者中113完成LC，住院时间为5～7 d（平均5.50 d）；15例中转开腹完成，住院时间为7～9 d（平均7.46 d）。术后发生胆汁漏1例，经保守治疗治愈，余术中、术后均未发生严重并发症。128例患者术后随访3个月～2年（平均19.4个月），无并发症发生。 结论术中仔细解剖，谨慎操作，采用适当的手术技巧，多数困难LC能顺利完成，遇复杂情况果断中转开腹是避免LC严重并发症的关键措施。