帕金森病患者合并认知功能障碍与血清Aβ1-42、胱抑素C、尿酸水平的关系

目的:探讨帕金森病(PD)患者合并认知功能障碍与血清Aβ1-42、胱抑素C(CysC)、尿酸(UA)水平的关系。方法:收集108例散发型PD患者(PD组)及同期就诊于本院体检中心的108例健康体检者(对照组)的血清,记录人口学资料及血CysC、UA的检验结果,采用ELISA法检测2组血清的Aβ1-42水平。结果:PD组的血清Aβ1-42水平、UA水平低于对照组(P0.05),CysC水平高于对照组,差异均有统计学意义(P0.001)。中晚期PD患者较早期PD患者的CysC水平升高(P0.05)。随认知障碍加重,Aβ1-42水平呈现降低趋势,CysC呈升高趋势,但差异均无统计学意义(P0.05)。PD组的血清CysC水平与Mo CA评分中命名部分呈显著正相关(P0.01);PD组的UA水平与UPDRSⅢ评分负相关(P0.05),与MMSE评分、Mo CA评分正相关(P0.05)、视空间与执行功能、命名呈显著正相关(P0.01)。结论:PD患者血清Aβ1-42水平及血尿酸水平降低,CysC水平升高。     

IL-8对肺癌NCI-H157细胞增殖和迁移的影响

目的 研究IL-8对肺癌细胞增殖和迁移的影响,初步探讨IL-8调控肺癌细胞的分子机制.方法 体外培养肺癌NCI-H157细胞,用不同浓度的IL-8刺激肺癌细胞,分别用MTT法检测IL-8对肺癌细胞的增殖作用;划痕损伤实验和Transwdl小室两种方法检测肺癌细胞的迁移能力;Western blot检测Rac1和Cdc 42蛋白的表达变化.结果 IL-8促进NCI-H157细胞增殖,但随浓度增加,细胞增殖活性差异无统计学意义;细胞划痕损伤和Transwell实验均表明IL-8可诱导NCI-H157细胞迁移,且具有浓度依赖性;Western blot结果显示,随着IL-8浓度增加,Rac1和Cdc 42的表达水平逐渐升高,以Cdc42变化最为显著.结论 IL-8可促进肺癌细胞增殖和迁移,可能与Rac1和Cdc42表达有关.     

Cdc42: Role in Cancer Management

Contribution of Cdc42, a member of Rho family, has been characterized for the beginning of variety of cellular responses including cellular transformation, cell division, cell invasion, migration, invadopodia formation, enzyme activity, filopodia formation, and cell polarity in cells. Deregulation of Cdc42 can alter the normal functioning of the cells, responsible for the initiation of signaling pathways and is correlated with several pathogenic processes such as cancer. Therefore, maintaining the level of Cdc42 and its effectors in cells, tumor progression can be controlled. Therefore, it can be suggested that deeper understanding about the Cdc42 contribution in cancer cell progression at molecular level can approach to the development of Cdc42 inhibitors in cancer management.     

电针对局灶性脑缺血再灌注大鼠皮质Slit-Robo三磷酸鸟苷酶激活蛋白-1和细胞分裂周期蛋白42表达的影响

目的:观察电针对大脑中动脉闭塞(MCAO)模型大鼠皮质Slit-Robo三磷酸鸟苷酶激活蛋白-1(Slit-Robo GTPase-activating protein-1,srGAP 1)和细胞分裂周期蛋白42(cell division-cycle 42,Cdc 42)表达的影响,探讨srGAP 1和Cdc 42在电针治疗MCAO后神经恢复中的作用。方法:雄性SD大鼠随机分为正常组、模型组、非经穴组和电针组,每组12只。利用改进的Longa法复制MCAO模型。电针组取"曲池""足三里"穴,非经穴组取手足阳明经与少阳经之间非经穴处,每日1次,每次30min,共14d。分别在术后1、3、7、14d时间点对各组大鼠进行神经功能评分(mNSS),并利用免疫荧光法检测缺血侧大脑皮质中srGAP 1和Cdc 42的荧光强度及分布,用免疫印迹(Western blot)法检测大鼠梗死区周围大脑皮质中srGAP1和Cdc 42蛋白表达。结果:神经功能评分显示,在术后7、14d时电针组较模型组、非经穴组同时间段的mNSS评分显著降低(P0.01)。免疫荧光检测结果显示,srGAP 1和Cdc 42主要在细胞质表达;模型组srGAP 1高于正常组(P0.01),而电针组显著低于模型组和非经穴组(P0.01);模型组Cdc 42显著低于正常组(P0.01),而电针组明显高于模型组和非经穴组(P0.01)。Western blot检测结果显示,模型组srGAP 1蛋白表达量较正常组明显升高(P0.01),电针组srGAP 1蛋白表达显著低于模型组及非经穴组(P0.01);模型组Cdc 42蛋白表达量与正常组的差异无统计学意义(P0.05),而电针组Cdc 42蛋白表达显著高于模型组和非经穴组(P0.01)。结论:局灶性脑缺血再灌注后大鼠脑损区周围皮质srGAP 1明显增高,而Cdc 42明显减少,这可能与srGAP 1使Cdc 42失活有关;电针治疗后srGAP 1显著下调,而Cdc42上调,可能是电针促进脑梗死后神经功能恢复的机制之一。     

Transcatheter Aortic Valve Replacement for Severe Aortic Regurgitation With Acute Refractory Cardiogenic Shock

From January 2013 to January 2017, 686 consecutive patients were referred to our centre for transcatheter aortic valve replacement, including 5 subjects with severe aortic regurgitation and acute refractory cardiogenic shock. These patients were contraindicated for surgical treatment by the heart team because of high surgical risk (median logistic EuroSCORE: 74.6/Society of Thoracic Surgeons score: 37.9). The success rate of valve implantation was 100% through transfemoral access with self-expandable devices. The observed 30-day mortality rate was 20%. Hence, the transcatheter aortic valve replacement procedure might represent a successful and life-saving intervention for treatment of patients with severe aortic regurgitation who present with acute refractory cardiogenic shock.