蛋白磷酸酶2A的癌性抑制因子表达对喉癌细胞株Hep-2增殖的影响及相关机制研究

目的:研究蛋白磷酸酶2A的癌性抑制因子(cancerous inhibitor of protein phosphatase 2A,CIP2A)表达对喉癌细胞株Hep-2增殖的影响及相关分子机制。方法:以特异性si RNA和阴性对照序列转染喉癌Hep-2细胞,实验分为CIP2A si RNA组与Control si RNA组。平板克隆形成实验检测CIP2A在喉癌细胞增殖中的作用;MTT法检测CIP2A对细胞生长曲线及顺铂敏感性影响;流式细胞术检测细胞周期分布和凋亡率的改变。real-time PCR检测CIP2A m RNA表达水平,Western blot检测CIP2A及生长相关蛋白c-myc、AKT、p-AKT、cyclin D1的蛋白表达水平。结果:沉默CIP2A后,CIP2A在基因及蛋白水平的表达量明显降低,Hep-2细胞生长减缓,克隆的形成被抑制,Control si RNA组为339.00±34.00,CIP2A si RNA组为126.00±33.00,差异有统计学意义(t=-7.796,P=0.010);沉默CIP2A可增加喉癌细胞对顺铂的敏感性,Control si RNA组IC50为(6.67±0.54)μg/ml,CIP2A si RNA组为(3.53±0.32)μg/ml,差异有统计学意义(t=8.598,P=0.001);细胞周期阻滞于G1期,Control si RNA组G1期细胞比例为66.860±1.972,CIP2A si RNA组为74.613±3.357,差异有统计学意义(t=3.449,P=0.026);S期细胞比例减少,Control si RNA组为23.713±1.564,CIP2A si RNA组为17.747±1.255,差异有统计学意义(t=-5.153,P=0.007);沉默CIP2A没有引起细胞凋亡率的变化(P=0.216)。Western blot结果显示,沉默CIP2A表达可下调Cyclin D1(t=-4.531,P=0.011)、c-myc(t=-4.522,P=0.011)、pAKT(t=-4.574,P=0.010)的表达,但对总AKT蛋白的表达没有影响(t=0.051,P=0.962)。结论:沉默CIP2A基因可抑制喉癌Hep-2细胞生长,增加喉癌细胞对顺铂的敏感性,其机制可能与下调c-myc、p-AKT、cyclin D1的表达有关。     

Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions

Background:The footprint of most prostheses is designed according to Caucasian data.Total disc replacement (TDR) has been performed widely for cervical degenerative diseases in China.It is essential to...     

HBX在肝癌细胞中通过下调miR-199a增强AKT的表达

目的 探讨乙型肝炎病毒X蛋白(hepatitis B virus X protein,HBX)调节miR-199a的表达在HBV相关性肝癌发生中的分子机制.方法 重组HBX腺病毒(Ad-HBX)感染人肝癌HepG2细胞,HBX的siRNA转染稳定表达HBV基因的人肝癌HepG2.2.15细胞,荧光定量PCR方法检测HBV相关性肝癌组织标本和肝癌细胞中HBX、miR-199a、AKT的mRNA表达水平及运用Western blot检测肝癌组织标本和肝癌细胞中HBX、AKT的蛋白表达水平;分别用miR-199a mimics和miR-199a inhibitor的转染肝癌细胞后,荧光定量PCR方法检测肝癌细胞中AKT的mRNA表达水平及运用Westem blot检测肝癌细胞中AKT的蛋白表达水平.结果 miR-199a在HepG2.2.15细胞中表达水平显著低于HepG2细胞,并且证实其表达下调受到了HBX的调控(P＜0.05),HepG2.2.15细胞中AKT表达水平显著高于HepG2细胞(P＜0.05),在HepG2.2.15细胞中过表达miR-199a能明显下调AKT表达水平以及在HepG2细胞中抑制miR-199a能明显上调的AKT表达水平(P＜0.05),此外,miR-199a的表达量在HBV相关性肝癌组织比相应的癌旁组织表达降低.结论 HBX可以通过miR-199a调节AKT导致HBV相关性肝癌发生.     

急性胸腹部创伤并骨折的螺旋CT应用价值

目的探讨多层螺旋CT对急诊胸腹部创伤并骨折的应用价值。方法回顾分析45例急诊胸腹部创伤且无肺损伤、气胸或液气胸、皮下气肿及腹部脏器损伤患者的CT影像表现。结果 CT显示31例有骨折(占68.89%)。其中肋骨骨折17例(隐匿性骨折11例),胸椎椎体骨折2例,腰椎椎体骨折5例,腰椎横突骨折7例;复合性骨折2例。结论多层螺旋CT薄层横断面结合二维、三维重建技术能够明显提高急诊胸腹部创伤并骨折的诊断准确率,为临床治疗方案及法医伤情鉴定提供重要参考价值。     

Felodipine in patients with chronic heart failure: discrepant haemodynamic and clinical effects.

Previous open studies have suggested that felodipine, a selective calcium antagonist and vasodilator, may be useful in the treatment of heart failure. A double blind placebo controlled crossover trial was therefore conducted to investigate the clinical and haemodynamic effects of felodipine in 15 patients with chronic ischaemic heart failure in New York Heart Association symptom class III. Felodipine significantly increased resting and exercise (25W bicycle ergometry) cardiac output without producing concomitant changes in resting or exercise heart rate or right and left ventricular filling pressures. Felodipine did not significantly improve symptom scores or exercise capacity in the group as a whole. It also resulted in significant fluid retention as shown by a rise in ankle circumference, body weight, and a fall in haematocrit. Further research is required to elucidate the mechanism that is responsible for the discrepancy between the haemodynamic and clinical effects of felodipine in patients with moderately severe heart failure.     

Clinical and psychological correlates of quality-of-life in polycystic ovary syndrome

OBJECTIVE: Polycystic ovary syndrome (PCOS) has been shown to cause a reduction in quality of life. This study examines the extent of different PCOS symptoms on quality-of-life, psychosocial well-being and sexual satisfaction. METHODS: Complete metabolic, hormonal, clinical and psychosocial data were obtained from a total of 120 women with PCOS. Patients were compared with 50 healthy women to establish reductions in quality-of-life and emotional well-being. In addition, the correlation between psychosocial variables and the major clinical PCOS features obesity (body mass index (BMI)), excessive body hair (hirsutism score), acne, hyperandrogenism (serum testosterone levels), disturbed insulin regulation (area under the insulin response curve and homeostasis model assessment of insulin resistance), menstrual cycle disturbances and infertility were analyzed. RESULTS: PCOS patients showed significant reductions in quality-of-life, increased psychological disturbances, and decreased sexual satisfaction when compared with healthy controls. BMI and hirsutism scores, but not the presence of acne, were associated with physical aspects of quality-of-life and sexual satisfaction. No clear effect of androgens or insulin resistance on psychosocial variables was detected. Similarly, the type of menstrual cycle disturbances or infertility had no impact on psychological well-being. CONCLUSION: In PCOS, changes in appearance, particularly obesity and hirsutism, reduce physical dimensions of quality-of-life and decrease sexual satisfaction. The role of biochemical, endocrine and metabolic parameters as well as menstrual irregularities and infertility appeared to be less important. Clinicians should pay attention to the psychosocial dimensions of PCOS on an individual basis, regardless of symptom severity or treatment response.     

心痛灵滴丸预适应对兔心肌缺血再灌注损伤保护作用的研究

目的：探讨心痛灵滴丸预适应对兔心肌缺血再灌注损伤的保护作用。方法：采用冠状动脉粥样硬化(AS)家兔在体心肌缺血再灌注损伤模型，观察心痛灵滴丸预适应对兔心肌组织形态结构和脂质过氧化的影响。结果：心痛灵滴丸预适应能减轻缺血再灌注时心肌组织及细胞超微结构的形态学损伤，能显著提高兔血清超氧化物歧化酶(SOD)活性，降低血清丙二醛(MDA)含量，而且能加强缺血预适应对兔心肌缺血再灌注损伤的保护作用。结论：心痛灵滴丸预适应能诱导缺血预适应样心脏保护作用，其机制可能与清除氧自由基、抑制脂质过氧化反应有关。     

宜兴市胃癌手术患者临床特征分析1022例

目的:探讨江苏省宜兴市地区胃癌病例临床特征的变化趋势,为防治胃癌提供依据.方法:宜兴市人民医院1999-2006经病理证实的胃癌手术患者1022例,分析逐年收治病例的临床病理特征及变化趋势,按手术时间先后分成两组:1999-2002组(A组)和2003-2006组(B组).比较两组病例性别、年龄、肿瘤大小、发生部位、分化程度、临床分期和术后辅助化疗情况的差异结果:两组患者发病部位均以胃体、贲门和胃窦处为常见.与A组相比,B组胃癌发生于胃体处患者比例明显下降(X2=21.59,P＜0.05),而发生于胃角的比例升高(X2=33.16,P＜0.05).两组胃癌患者肿瘤分化程度都以低分化及中分化为主,B组低分化比例较A组明显下降(X2=46.11,P＜0.05),而中分化胃癌比例明显升高(X2=37.68,P＜0.05).两组病例的肿瘤直径和pTNM分期构成比方面均无显著差异.结论:宜兴市胃癌发病人数呈逐年上升趋势,而其肿瘤细胞的分化呈逐步升高的趋势.