苦瓜蛋白对BALB/C小鼠柯萨奇B3病毒性心肌炎核因子κB的调节作用

为探讨苦瓜蛋白对BALB／C小鼠柯萨奇B3病毒性心肌炎的治疗作用机制，以核因子κB为对象，来观察苦瓜蛋白的调节作用。从苦瓜果肉中提取苦瓜蛋白后，将动物分为5组：病毒对照组、正常对照组、药物对照组、高剂量治疗组、低剂量治疗组，分别在实验的第0d,3d,7d,14d和第21d处死动物，提取核蛋白，在用BCA方法进行蛋白定量后作凝胶滞留分析（EMSA），测定核因子κB的活性，并进行比较分析。结果发现：（1）病毒对照组在第21天时仍然有一定量的核因子κB活化，且其活化程度明显高于正常对照组；（2）高、低剂量的苦瓜蛋白对核因子κB表现出不同程度的抑制作用，其中高剂量组核因子κB几乎看不到活化，低剂量组比病毒对照组核因子κB活化程度明显降低；（3）正常对照组和药物对照组核因子κB只有低水平活化。结果提示，苦瓜蛋白对病毒性心肌炎的治疗作用可能与其降低核因子κB的活性有关。     

免疫球蛋白κJ区重组信号结合蛋白对CD133阳性室管膜细胞增殖与分化的影响

目的 探讨免疫球蛋白κJ区的重组信号结合蛋白(RBP-JK)对CD133阳性室管膜细胞增殖与分化的影响及可能的机制.方法 分离孕12 d的美国癌症研究所(ICR)胚胎小鼠(3只)侧脑室室管膜细胞进行原代培养,并使用 RBP-Jκ-siRNA 干扰 RBP-JK,以及选用2～3月龄体重为20～25 g 的 CD133-C...     

The test-retest reliability of a revised version of the Readiness for Interprofessional Learning Scale (RIPLS)

The original version of the Readiness for Interprofessional Learning Scale (RIPLS) was published by Parsell and Bligh in []. The only aspect of reliability considered by the authors was the internal consistency. A revised version for use with undergraduate students was published in 2005 (McFadyen et al., []). That paper also reported internal consistency of the revised version. Subsequently a sample from one professional group (n = 65) was used to assess test-retest reliability, over a one week period, of each of the 19 items and of the sub-scale totals, using Weighted Kappa and the intra-class correlation (ICC) respectively, and these results are reported in the present paper. The test-retest reliability of the individual items using Weighted Kappa was satisfactory, with the exception of two items (Items 11 and 12). The ICC results for the sub-scale totals were all in excess of 0.60 with the exception of sub-scale two. This revised version of RIPLS would appear to have good reliability in three of its sub-scales but further research, with larger samples, is required before the fourth sub-scale can be reliably assessed.     

Lenstar LS900测量仪与iTrace视觉功能分析仪测量白内障患者术前Kappa角与Alpha角一致性研究

目的比较Lenstar LS900测量仪与iTrace视觉功能分析仪测量年龄相关性白内障患者术前Kappa角与Alpha角的一致性。方法收集2017年12月至2018年6月在中国医科大学附属第四医院眼科就诊的年龄相关性白内障患者55例(59眼),术前分别应用Lenstar LS900测量仪和iTrace视觉功能分析仪测量以瞳孔为中心的视轴偏心距(Kappa角)和以虹膜为中心的视轴偏心距(Alpha角)。先收集在角膜顶点平面分解的X轴和Y轴坐标,再通过三角函数计算偏心距,最后分别比较X轴、Y轴、瞳孔直径、角膜水平直径、视轴偏心距。两种仪器所测数据的比较采用配对t检验,一致性比较采用Bland-Altman分析。结果 Lenstar LS900测量的Kappa角为(0.270±0.128)mm,Alpha角为(0.349±0.128)mm,瞳孔直径为(4.101±0.773)mm,角膜水平直径(白到白,WTW)为(10.848±0.467)mm,X轴Kappa角为(0.016±0.225)mm,Y轴Kappa角为(0.105±0.185)mm,X轴Alpha角为(0.010±0.353)m...     

应用蛋白质组学研究白斑差异表达蛋白

目的:通过筛选口腔白斑及正常黏膜组织的差异表达蛋白,为研究白斑发生机制提供实验依据。方法:收集口腔白斑组织及正常口腔黏膜组织,提取组织蛋白,进行二维电泳,选择在表达差异量较大的11个点进行质谱和生物信息学分析,确定所分析的蛋白质类型。结果:人口腔白斑及正常黏膜组织的二维电泳图谱的平均蛋白质点数分别为1726±67和1608±73,蛋白质点重复性较好。人口腔白斑与正常黏膜组织的双向凝胶电泳图谱,差异表达蛋白质点数为38个,其中16个点在白斑中为高标达,22个点在白斑中为低表达,选择11个表达差异量较大的蛋白质点进行质谱和生物信息学分析,鉴定出其中的5个点,分别为膜联蛋白A2,角蛋白8,角蛋白1,II型角蛋白亚基,免疫球蛋白(Ig)κ型轻链的恒定区(C区)片段等。结论:膜联蛋白A2,角蛋白8,角蛋白1,II型角蛋白亚基,Igκ型轻链的C区片段等在口腔白斑发生发展过程中发生了改变。     

非小细胞肺癌的16层螺旋CT TNM分期与其病理相关性的研究

目的探讨16层螺旋CT(16-SCT)在诊断非小细胞肺癌TNM分期与病理TNM分期的相关一致性。方法选用由16-SCT检查并经手术治疗的84例非小细胞肺癌病例,采用国际肺癌TNM分期(1997年)标准进行诊断,将16-SCT诊断的TNM分期结果与手术、病理分期结果进行比较,分析16-SCT诊断分期结果与手术病理TNM分期相关一致性。结果16-SCT诊断肺癌的TNM分期与病理分期有良好的一致性。在总的TNM分期中,16-SCT的符合率、灵敏度、特异度分别达到91.7%、82.2%、93.7%。16-SCT在诊断非小细胞肺癌T、N分期中,与病理的Kappa值分别为0.84、0.79。结论16-SCT能够准确诊断非小细胞肺癌TNM分期,16-SCT为非小细胞肺癌的诊断治疗提供重要的影像学资料。     

Functional implications of kappa opioid receptor-mediated modulation of glutamate transmission in the output regions of the basal ganglia in rodent and primate models of Parkinson's disease

Parkinson's disease is characterized by an increased excitatory amino acid transmission in the internal segment of the globus pallidus and the substantia nigra pars reticulata. The effects of the kappa receptor agonist enadoline (CI-977) on glutamate transmission were investigated in vitro. Enadoline reduced the K⁺-evoked release of glutamate from slices of substantia nigra in a concentration-dependent manner (maximum effect: 78% inhibition at 200 μM). This effect was blocked by the selective kappa receptor antagonist nor-binaltorphimine. The endogenousm ligand for kappa receptors i sthought to be dynorphin. Dynorphin released from terminals of striato-pallidal and striato-nigral pathways might thus act as an endogenous modulatory agent on glutamatergic transmission in the basal ganglia. In vivo experiments were carried out in rodent and primate models of Parkinson's disease to assess the potential of manipulating kappa receptors as a potential treatment for Parkinson's disease. Enadoline reduced reserpine-induced akinesia when injected in the entopeduncular nucleus of the rat. Similarly, injections of CI-977 in the internal segment of globus pallidus (GPi) of the MPTP-treated marmoset alleviated parkinsonian symptoms and allowed the animal to recover its locomotor activity. This suggest that reducing the overactive glutamatergic transmission in the output regions of the basal ganglia by activating kappa receptors might potentially form the basis of a novel anti-parkinsonian therapy.     

Effects of repeated ritanserin on middle-aged poor sleepers

The present study was designed to investigate the effect of U-50, 488H, a highly selective kappa opioid agonist, on ipsilateral and contralateral circling behavior induced by methamphetamine and by apomorphine, respectively. U-50, 488H (3.2–10 mg/kg IP) by itself failed to induce either ipsilateral or contralateral circling in rats with unilateral nigral lesions produced by an injection of 6-hydroxydopamine. U-50, 488H produced a significant dosedependent inhibition of methamphetamine (1.0 mg/kg SC)elicited ipsilateral circling. However, it had no effect on contralateral circling induced by apomorphine (0.5 mg/kg SC). The present results indicate that U-50, 488H presynaptically inhibits the release of dopamine in the rat striatum.     

Expression of immunoglobulin kappa and lambda chains in mink

The ratio of ? and λ chains of immunoglobulins varies significantly from one species to another. It has previously been thought that λ was only type expressed in mink. We tested mink immunoglobulin light chains using two monoclonal antibodies G80 and G88. It has been shown that G80 and G88 specifically recognize two antigenically different subpopulations of the light chains. Immunochemical analysis of these subpopulations separated by affinity chromatography suggested that they represent λ and ? types of light chains, respectively. Screening of a mink cDNA library with monoclonal antibody G88 resulted in the isolation of clone pIGK-1 containing ? chain-encoding sequence. The cDNA insert of pIGK-1 included most of the V segment, as well as the J, C and 3′ untranslated sequences. Mink V? sequence shown the highest homology with the human V?II subgroup genes (76-79%). Mink C? sequence was 53-63% homologous to C? of other species. The striking feature of mink C? chain is the presence of glutamine in the C-terminal position. Southern blot analysis suggested that mink haploid genome has one C? gene and multiple V? genes. The ?: λ chain ratio in the 12 minks studied was, on the average, 46:54. The same ratio was observed for the ?- and X-producing cells in the mesenteric lymph nodes. The five previously identified mink light chain allotypes were assigned to the λ chains, thereby confirming that λ chains in this species are additionally subdivided into several subtypes.