NSAID对胰腺癌中COX-2的表达及其生长活力的影响

目的 :检测胰腺癌中COX 2表达 ,探讨COX 2抑制剂非甾体类消炎药 (NSAID)的抑癌机制。方法 :胰腺癌组织和细胞株中的COX 2检测分别采用免疫组化和细胞免疫化学分析 ,并使用MTT法及流式细胞仪检测细胞株生长活力和凋亡。结果 :胰腺癌组织中COX 2的表达增强 ,阳性率 73.3% (P <0 .0 5 )。SW 1 990和Capan 2细胞株均有COX 2表达 ,前者高表达 ,后者低表达。两种NSAID(NS398及ASA)均可抑制两种细胞株的生长 ,诱导细胞凋亡率显著升高 ,并与细胞株COX 2表达强度有关 ;对SW 1 990细胞株的作用强于Capan 2 ,NS398的抑制作用又强于ASA。结论 :COX 2在胰腺癌组织和细胞株中表达增强 ,NSAID抗胰腺癌机制可能是通过抑制COX 2活性 ,诱导胰腺癌细胞凋亡     

Apnoea induced by airflow obstruction

Total obstruction of the airways caused all respiratory efforts to stop on 15 occasions in 10 preterm babies. This was not seen in 60 studies on 38 term babies. These findings suggest that failure to achieve an oral airway may not be the only mechanism by which upper airway obstruction might cause the cot death syndrome.     

Leptin concentrations in the follicular phase of spontaneous cycles and cycles superovulated with follicle stimulating hormone

It has been reported that oestradiol may play a role in the production of leptin from adipocytes. To investigate this relationship further, nine normally ovulating women were studied during two menstrual cycles, i.e. an untreated spontaneous cycle and a cycle treated with follicle stimulating hormone (FSH) from cycle day 2 until the day of human chorionic gonadotrophin (HCG) injection. Serum leptin values on cycle day 2 did not differ significantly between the spontaneous and the FSH cycles. In the spontaneous cycles, leptin values declined gradually and significantly up to day 7 and then increased progressively up to the day of luteinizing hormone (LH) surge onset, at which point they achieved the highest values. In the FSH cycles, serum leptin values increased gradually and significantly up to day 6, remaining stable thereafter, and were in the midfollicular phase significantly higher than in the spontaneous cycles. Significant positive correlations were found between mean values of leptin and mean values of oestradiol during the second half of the follicular phase in the spontaneous cycles and during the first half in the FSH cycles. A significant negative correlation was found between these two parameters in the spontaneous cycles during the first half of the follicular phase. Serum leptin levels were significantly higher in the midluteal than in the follicular phase in both cycles. These results demonstrate for the first time significant changes in leptin values during the follicular phase of the human menstrual cycle and a significant increase during superovulation induction with FSH. It is suggested that oestradiol may be involved in the regulation of leptin production in women.      

Current and future status of ovulation induction in polycystic ovary syndrome

Great progress has been achieved during the last 20 years inthe field of ovulation induction in patients with polycysticovary syndrome (PCOS). Clomiphene citrate remains the firstline of treatment for all anovulatory women with PCOS, sincein properly selected patients the cumulative pregnancy rateapproaches that in normal women. Human urinary gonadotrophinshave been used extensively for ovulation induction but the developmentof low-dose regimens has opened a new era in the managementof anovulation related to PCOS. This article discusses the mainadvantages and disadvantages of the principal methods and regimenscurrently used for ovulation induction in patients with PCOSincluding clomiphene citrate, gonadotrophins, pulsatile gonadotrophin-releasinghormone (GnRH) and GnRH agonists. It also discusses new drugsdiscovered recently, particularly recombinant gonadotrophinsand GnRH antagonists, and provides some thoughts regarding theiruse in future protocols. Finally, based on the discovery ofnew ovarian substances which specifically control luteinizinghormone (LH) secretion, this article develops assumptions onpossible implications of these substances in the pathophysiologyof PCOS and their potential use in the management of the syndrome.     

真菌感染在新生儿疾病中的护理方法探讨

目的探讨综合护理方法在新生儿真菌感染类疾病中的护理效果。方法回顾性总结我院收治的发生真菌感染类疾病新生儿的护理资料56例,按照护理方法不同分为两组:选择综合护理方法护理的30例为观察组,常规护理方法的26例为对照组,各组患儿分别在护理后按照本研究统计指标进行统计并比较差异性。结果观察组治愈29例(96.7%),死亡1例(3.3%);对照组治愈15例(57.7%),死亡11例(42.3%),两组护理结果差异具有统计学意义(P<0.05)。结论对真菌感染新生儿治疗过程中,采取综合性护理措施(集中操作、加强监护、强化无菌意识和积极治疗等)具有更优秀的临床护理效果。     

实验性高胆固醇血症兔离体主动脉功能变化的研究

目的探讨高胆固醇血症对血管功能的影响。方法20只新西兰雄性兔随机分为2组正常饮食组(normal cholesterol,NC)10只及高胆固醇饮食组(hypercholesterol,HC)10只。4周后取出每只兔的降主动脉,5mm宽动脉环放置于含有25mlKreb液的组织－器官水浴系统中。分别测量游离血管对乙酰胆碱（10-10～10-5mol/L)的舒张反应及对去甲肾上腺素（10-10～10-5mol/L）的收缩反应。结果2组兔血胆固醇有显著差异,其中NC组（30.1±11.2）mg/dl,HC组（987.3±110.0)mg/dl(P<0.01);HC组血管对乙酰胆碱舒张反应与NC组比较明显减弱,HC组最大为（58.50±6.17）％,NC组最大为(103.2±6.9)％(P<0.01）;HC组血管对去甲肾上腺素反应增强,最大收缩力HC组为(4.15±0.56)g,NC组为(2.9±0.3)g(P<0.05）。2组动脉病理学检查无动脉硬化的改变。结论高胆固醇血症降低血管内皮依赖性舒张反应,增加血管对去甲肾上腺素的收缩反应。高胆固醇血症时血管内皮功能改变早于动脉粥样硬化的结构改变。     

2型糖尿病患者血浆同型半胱氨酸水平与冠心病的关系

目的探讨2型糖尿病患者血浆同型半胱氨酸（homocysteine,Hcy）水平与冠心病是否相关。方法回顾性分析169例2型糖尿病并已行选择性冠脉造影的患者,按冠脉狭窄程度分为对照组,单支组,双支组和多支病变组,分析不同组别Hcy及其他临床生化指标。结果冠心病各亚组Hcy均高于对照组（P〈0.05）,Hcy随冠脉病变程度的加重而升高,多支病变组Hcy明显高于单支组,与之呈正相关（P〈0.05）;多元逐步回归分析显示血浆同型半胱氨酸与冠脉狭窄程度明显相关（P〈0.05）。结论2型糖尿病患者血浆同型半胱氨酸水平升高有可能加重冠脉粥样硬化。     

Anti-glomerular basement membrane disease and dual positivity for antineutrophil cytoplasmic antibody in a patient with membranous nephropathy

We present the case of a 50-year-old man who underwent kidney biopsy for nephrotic syndrome. In addition to a membranous pattern, anti-glomerular basement membrane (anti-GBM) staining was noted before manifestations of anti-GBM disease. Hematuria and renal failure ensued 2 weeks later. In addition, he had simultaneous circulating levels of anti-GBM antibody and both perinuclear (P-) and cytoplasmic (C-) antineutrophil cytoplasmic antibody (ANCA).