west china medical publishers
Author
  • Title
  • Author
  • Keyword
  • Abstract
Advance search
Advance search

Search

find Author "韩佳" 2 results
  • Twist与E-cadherin在结直肠癌中的表达及其意义

    目的探讨Twist和E-cadherin蛋白在结直肠癌组织中的表达及其可能的机理、相互作用以及与结直肠癌预后的关系。 方法应用免疫组化SP法检测63例结直肠癌组织以及21例正常结肠黏膜组织中Twist和E-cadherin蛋白的表达,并分析其与结直肠癌临床病理特征和患者预后的关系。 结果Twist蛋白在结直肠癌组织中的表达阳性率为66.7%(42/63),而在正常结直肠黏膜组织中的表达阳性率为14.2%(3/21),前者高于后者(P<0.01);E-cadherin蛋白在结直肠癌组织中的表达阳性率为20.6%(13/63),而在正常结直肠黏膜组织中的表达阳性率为81.0%(17/21),前者低于后者(P<0.01)。两者的表达与肿瘤的分化程度及T、N和M分期均相关(P<0.05)。相关性分析显示,Twist和E-cadherin蛋白的表达呈负相关关系(r=-0.215,P=0.039)。 结论Twist和E-cadherin蛋白的表达可能与结直肠癌的发生发展和侵袭转移相关,并可作为评价结直肠癌生物学行为和预后的重要指标。Twist和E-cadherin蛋白表达呈负相关关系提示,在上皮-间质转化过程中可能是通过抑制E-cadherin蛋白的表达来实现的。

    Release date: Export PDF Favorites Scan
  • Influence of dexmedetomidine on stress of elderly patients with cardiovascular risk undergoing gastrointestinal laparoscopic surgery

    Objective To evaluate the influence of dexmedetomidine on the stress of elderly patients with cardiovascular risk undergoing gastrointestinal laparoscopic surgery. Methods From August 2014 to December 2015, 210 patients undergoing elective laparoscopic gastrointestinal operations were randomly divided into three groups, including the low concentration group (group D1), the high concentration group (group D2), and the control group (group C), with 70 cases in each group. The patients in group D1 and group D2 were injected with dexmedetomidine (0.4 and 0.8 μg/kg respectively) by infusion pump before anesthesia induction, and were continuously pumped with dexmedetomidine [0.4 and 0.8 μg/(kg·h) respectively] until the end of the surgery. Meanwhile, the patients in group C were injected with normal saline of the equal volumes. The heart rate and mean arterial pressure (MAP) was recorded before anesthesia, after endotracheal intubation and extubation. Myocardial ischemia and cardiovascular adverse events thatneeded to be handled were recorded. The concentrations of dopamine, adrenaline (AD) and noradrenaline (NE) were monitored at 15:00 one day before surgery (Ty), one hour after the beginning of surgery (T0), and at 15:00 of the 1st, 2nd, and 3rd day after surgery (T1, T2, T3). Results A total of 178 patients completed the study and were enrolled in this study, including 60 cases in group D1 and 59 cases in group D2 and C respectively. In group D1 and D2, the heart rates after intubation [(80.4±9.6), (68.2±10.5) times/minutes], extubation [(70.1±6.2), (69.7±7.8) times/minutes] and MAP after extubation [(100.2±12.0), (98.0±13.1) mm Hg (1 mm Hg=0.133 kPa)] were lower than those in group C [(98.4±10.5) and (95.2±7.3) times/minutes; (121.8±10.5) mm Hg], and the differences were significant (P<0.05). The bradycardia and hypotension in group D2 (27.12%, 22.03%) was significantly higher than those in group C (3.39%, 8.47%). Hypertension in group D1 and D2 (5.00%, 1.69%) was significantly lower than that in group C (37.29%), and the differences were significant (P<0.05). Compared with the base value at Ty in the three groups, the concentration of dopamine at T0-T3 in group C, at T0-T1 in group D1, and at T0 in group D2 increased significantly (P<0.05); the AD at T0-T3 in group C, at T0-T2 in group D1, and at T0-T1 in group D2 increased significantly (P<0.05); the NE at T0-T2 in group C, and at T1 in group D1 increased significantly (P<0.05). Compared with group C at the same time, the DA at T3 in group D1 and at T1-T3 in group D2, the AD at T2-T3 in group D1 and at T0-T3 in group D2, the NE at T0-T1 in group D1 and T0-T3 in group D2, decreased significantly (P<0.05). Conclusions Dexmedetomidine can effectively restrain the changes of hemodynamics and catecholamine induced by perioperative stress responses in a dose-dependent manner. During the surgery of elderly patients with cardiovascular risk, the concentration of dexmedetomidine should be controlled moderately to gain the optimal effect.

    Release date:2017-10-27 11:09 Export PDF Favorites Scan
1 pages Previous 1 Next

Format

Content