GCF低表达宫颈癌HeLa细胞系的构建及辐射对其调控IER5基因表达的初步探究

目的 构建GCF低表达的宫颈癌HeLa细胞系,在⁶⁰Co γ射线照射下初步探究其细胞增殖以及调控宫颈癌放射敏感基因IER5的表达。 方法 经带有荧光标记的GCF低表达的质粒稳定转染HeLa细胞, G418筛选,蛋白印迹法、实时定量PCR法鉴定得到GCF-shRNA-HeLa单克隆细胞系。倒置显微镜观察细胞形态变化,CCK-8法探究不同剂量照射后的细胞增殖情况,在不同照射剂量下用蛋白印迹法检测GCF-shRNA-HeLa及对照细胞中IER5蛋白的表达情况。 结果 成功构建稳定表达的GCF-shRNA-HeLa单克隆细胞系,显微镜下观察GCF-shRNA-HeLa细胞比正常HeLa细胞体积小,细胞间隙较大,其中梭形细胞较多。蛋白印迹法及实时定量PCR验证了GCF-shRNA-HeLa的蛋白表达及mRNA转录水平均低于对照组(P<0.05)。辐射情况下实验结果显示在同一照射剂量、同一时间下GCF-shRNA-HeLa细胞比control对照细胞增殖缓慢(P=0.014)。不同剂量照射情况下蛋白印迹法检测HeLa细胞、control-shRNA-HeLa与GCF-shRNA-HeLa细胞IER5蛋白表达情况,结果同一辐照剂量下GCF沉默的细胞系中IER5的表达量比对照细胞高, 4Gy照射的GCF-shRNA-HeLa的IER5表达量最高(P<0.05)。 结论 本实验构建了低表达GCF的HeLa细胞系,初步探讨GCF作为IER5基因抑制性转录因子的作用。结合临床基因靶向治疗,可寻求可以降低GCF表达的方式,通过上调IER5表达这一双效途径来加速宫颈癌细胞凋亡。     

综合ICU患者死亡相关因素分析

分析进入ICU患者死亡相关因素分析，91例死因：①中枢性呼吸循环衰竭；②休克；③多系流器官功能衰竭；④猝死     

小麦胚营养价值的研究

对小麦胚进行了营养成分分析以及动物试验。小麦胚蛋白质含量高,氨基酸比值亦较理想。多不饱和脂肪酸的含量为67.23%,多不饱和脂肪酸/饱和脂肪酸(P/S)为3.89。动物试验可见麦胚组大鼠食量大,体重增长快,蛋白质功效比值与对照组无差别。蛋白质的真消化率低于对照组,生物学价值高于对照组,净蛋白质利用率与对照组无显著差异。     

神经白塞病临床特点分析并文献复习

目的 分析神经白塞病(neuro-Behcet's disease,NBD)的临床特点及治疗.方法 回顾分析航天中心医院2006年1月至2018年1月12例NBD患者的临床表现、实验室检查、影像学资料、治疗及预后.结果 12例患者,男7例,女5例;诊断NBD时的年龄16～55岁,平均(30±12)岁;均有白塞病(Behcet's disease,BD)的基本临床表现;口腔溃疡11例,生殖器溃疡7例,眼部病变5例,针刺反应阳性5例,结节红斑5例,发热4例.83％(10例)患者神经系统症状出现在BD其他系统首发表现之后平均(52±31)个月.神经系统症状以肢体无力(7例,58％)、头痛(6例,50％)、肢体活动障碍(5例,42％)、感觉障碍(4例,33％)、视力下降(3例,25％)等最为常见.9例患者行腰椎穿刺检查,3例存在脑脊液压力升高(33％).MRI可见长T1或等T1、长T2的异常信号,Flair像呈高信号.病灶可累及半球(50％)、脑干(25％)、小脑(8.3％)、脊髓(8.3％)、颅内静脉窦(8.3％))等多个部位.糖皮质激素联合免疫抑制剂治疗有效,好转9例(75％),病情反复3例(25％).结论 NBD临床表现多样,以累及中枢神经系统为主,肢体无力、头痛、感觉障碍为主要症状,需早期识别、及时诊断,经积极治疗后,大多预后良好.     

浙江平湖首次发现大麝鼩

食虫目中的鼩鼱科是一个比较大的科,在长期以来的卫生防病工作中一直很重视这个类群,因为它与啮齿类(老鼠)在传病意义上相同,但是,长期以来许多口岸卫生检疫部门将捕获的鼩鼱一律称之为臭鼩鼱,实际是错误的。鉴于此,并于2006年10月对浙江省嘉兴地区的平湖市邬桥进行了调查采集,所获得之鼩鼱科动物,经过反复严谨的鉴定,确认全部为大麝鼩,此次发现为浙江省首次报道(见表1、图1、图2)。     

Test and Microstructural Analysis of a Steel Slag Cement-Based Material Using the Response Surface Method

In this study, the silica fume replacement rate, fly ash replacement rate, and curing temperature were regarded as the independent variables, and the compressive and flexural strengths were regarded as the response values. The response surface method was used to construct the response surface polynomial regression model and obtain the optimal preparation parameters of a steel slag cement-based gel slurry (SCGS). The univariate and multivariate effects on the SCGS’s strength were investigated via analysis of variance and a three-dimensional surface model, and the hydration products and strength development law were characterized via scanning electron microscopy and X-ray diffraction. The actual compressive strengths at 3 and 28 d of age were 31.78 and 53.94 MPa, respectively, which were close to the predicted values (32.59 and 55.81 MPa, respectively), demonstrating that the optimized strengths were accurate and reliable. Further, the hydration reaction rate of SiO₂ in the silica fume and the physical filling effect of the inert components of fly ash and steel slag under the optimal parameters were the key factors for the early strength of the material. Moreover, continuous C₃S hydration in steel slag and the continuous excitation of the volcanic ash properties of fly ash were important factors for the later strength.     

不孕症肝郁病理的生殖内分泌实质研究

目的 :探讨肝郁的病理实质及其与下丘脑—垂体—性腺系统功能紊乱———排卵障碍之间的相关性。方法 :选择原发性不孕症患者 70例 ,正常已产妇女 19例作对照 ,以肝郁病理积分、性激素检测为指标。结果 :1.不孕症患者肝郁积分及肝郁分级均显著高于对照组 (P <0 .0 1)。 2 .月经周期第 10天 ,肝郁 3级E2 较 0级、2级显著降低 (P <0 .0 5 ) ;肝郁分级与性激素间无相关性 ;而PRL与E2 、P、P/E2 呈负相关 (P <0 .0 5～P <0 .0 1) ;PRL与LH、LH/FSH呈正相关 (P <0 .0 5 )。 3.月经周期第2 0天 ,肝郁 1级、3级LH较 0级显著降低 (P <0 .0 1) ;肝郁 3级P较 0级、2级显著增高 ;肝郁 3级PRL较 0级、2级显著升高(P <0 .0 5 ) ;肝郁分级与PRL呈正相关 (P <0 .0 5 ) ,PRL与LH/FSH呈正相关 (P <0 .0 5 )。结论 :“肝为生殖之枢” ,肝郁是不孕症的重要病理环节 ,肝郁———下丘脑—垂体—性腺系统功能紊乱———排卵障碍之间可能存在轴性相关     

小肠灌肠双重对比造影(附84例报告)

本文着重对应用日本全硅双腔气囊小肠导管行SBE检查的技术方法、小肠造影的正常表现,以气体或0.5％甲基纤维素溶液作为对比剂优缺点等问题进行阐述和讨论。84例检查结果表明,SBE检查不失为一种安全、准确的检查方法。     

Dysregulation of the TGF-β Postreceptor Signaling Pathway in Cell Lines Derived from Primary or Metastatic Ovarian Cancer

Transforminggrowthfactor β (TGF β)isamul tifunctionalhomodimeric polypeptide ,whichmaycausecellcyclearrest ,terminaldifferentiation ,orapoptosisandactsasanegativegrowthregulatorinmostnormalepithelialandendothelialcelltypes ,whereasmostmalignantcelllines…     

Effects of extract of Ginkgo biloba with venlafaxine on brain injury in a rat model of depression

Background Recent studies have indicated that chronic stress may give rise to brain damage,which is related to the genesis of depression. The purpose of this study is to investigate the effects of extract of Ginkgo biloba (EGb) and venlafaxine on depression. Methods Rats were treated with chronic and comprehensive stress to create a depression model. Immunohistochemistry was used to detect the expression of brain-derived neurotrophic factor (BDNF) in the hippocampal CA3 neurons of rats treated with different drugs. Behavioral changes of these rats were also examined.Results The expression of BDNF in the hippocampal CA3 neurons of the depression model decreased with a reduction in exploring behavior and a significant increase in fecal production. The expression of neuron nitricoxide synthase (nNOS) protein also increased in the rats compared to normal controls. The rats treated with EGb and venlafaxine showed an increase in expression of BDNF and exploring behavior compared to untreated rats, but a decrease in nNOS and fecal production. Conclusions Rats sustain damage to the brain after being subjected to chronic and comprehensive stress. Our research has indicated that combined EGb with venlafaxine enhances the protection of neurons and decreases damage to the brain, while relieving the side effects of synthetic antidepressants.