参七胶囊的制备及质量控制

目的 建立参七胶囊的制备工艺及其质量控制的薄层色谱(TLC)法。方法 将三七、人参、丹参用适宜的方法提取并制成胶囊。采用TLC法，对参七胶囊进行定性鉴别。以三氯甲烷-甲醇-水(65：35：10)为展开剂，10％硫酸乙醇溶液为显色剂，检测人参皂苷Rb1、Rg1，三七皂苷R1；以甲苯-醋酸乙酯-甲酸(8：5：0．8)为展开剂，2％三氯化铁溶液与1％铁氰化钾溶液(1：1)为显色剂，检测原几茶醛。结果 用TLC法分别检出参七胶囊中含人参皂苷Rb1、Rg1，三七皂苷R1及原儿茶醛。结论 本品制备工艺可靠，质量可控。     

实验性隐睾术后大鼠附睾的反应性变化

本研究描述了实验性隐睾术后大鼠附睾的形态学变化。结果表明,隐睾术后由于腹温作用和附皋管管腔内容物的改变,附睾管上皮细胞的形态和功能明显改变。术后早期上皮细胞出现无丝分裂相,上皮细胞的分泌和吞噬功能加强,胞质内含PAS阳性颗粒的细胞增多。随术后时间的延长,附睾上皮细胞变化逐渐趋于稳定。[     

趋化因子及其受体在肿瘤侵袭转移中的作用

近年来陆续发现了许多新的趋化因子和受体，研究发现趋化因子及其受体参与机体的多种生理和病理过程，并在肿瘤的侵袭转移中通过不同机制发挥着重要作用。本文对其进行简要综述。     

组织工程心肌补片对黑山羊陈旧性心肌梗死心功能和建立侧支循环的影响

目的探讨自体骨髓间充质干细胞(m arrow m esenchym a l stem ce lls,M SC s)-小肠黏膜下层(sm a llin testina l subm ucosa,S IS)构建的组织工程心肌补片,移植于陈旧性心肌梗死区后对心功能及缺血区建立侧支循环的影响。方法将已建立急性心肌梗死模型后6周的黑山羊16只,随机分为实验组和对照组,实验组抽取自体骨髓,经体外分离M SC s,进行培养、传代,以第3代细胞行5-B rdU标记并与S IS支架材料复合培养5 d,制备M SC s-S IS组织工程心肌补片。将其缝合至陈旧性心肌梗死区;对照组仅行假手术处理。于植入后6周,采用超声心动图观察两组动物心功能变化,数字减影血管造影选择性左冠状动脉造影观察缺血心肌侧支循环的建立。结果术后6周实验组及对照组:心博出量、左心室射血分数分别为42.81±4.91、37.06±4.75 m l和59.20%±5.41%和44.56%±4.23%,组间差异均有统计学意义(P<0.05);左心室舒张末期容积、左室收缩末期容积分别为72.55±8.13、83.31±8.61 m l和29.75±5.98、46.25±6.68 m l,组间差异均有统计学意义(P<0.05);左心室舒张功能各项指标分别为:E峰最大速度分别为54.85±6.35 cm/s和43.14±4.81cm/s(P<0.01);A峰最大速度分别为52.33±6.65 cm/s和56.91±6.34 cm/s(P>0.05)。超声心动图显示对照组左室腔扩张明显,室壁运动明显减弱,梗死区呈瘤样扩张,局部室壁反常运动;实验组左室腔明显小于对照组,室壁运动较对照组强,心尖梗死区扩张不明显。选择性左冠状动脉造影见实验组左冠状动脉前降支远端与回旋支间明显侧支循环建立。结论M SC s-S IS构建的组织工程心肌补片移植于黑山羊陈旧性心肌梗死区后侧支循环建立,心功能有明显改善作用。     

老年胼胝体压部FLAIR序列异常高信号发生机制的探讨

目的在磁共振液体衰减翻转恢复（FLAIR）序列图像，胼胝体压部出现高信号通常被认为是病理变化。本研究的目的是分析这种病理改变在老年患者中的发生率及其可能的病理机制，并综述该MR表现的鉴别诊断。方法回顾性复习132例疑诊神经系统疾病的患者（男56例，女76例，年龄9～90岁，平均59岁）的FLAIR序列图像。分别观察胼胝体压部、深部脑白质改变、梗死及脑萎缩的情况。结果在132例患者中，33例（平均年龄59岁）患者的FLAIR像上胼胝体压部可见异常高信号改变，这种异常改变与年龄、脑白质的异常、脑萎缩及认知障碍的表现显著相关。结论FLAIR像上胼胝体压部高信号在老年患者中是常见的表现，多见于有认知障碍的老年患者。其病理变化通常被称之为“脑白质疏松症”。了解该异常表现发生的机制及该表现的鉴别诊断可避免不必要的有创诊断和治疗。     

颈椎术后病人首次下床活动的感受及需求的调查

早期下床活动的必要性已得到大家认可,但术后早期病人常常较虚弱,且下床活动时会引发一些不适,病人也会有一些担心和顾虑,这在一定程度上会影响病人下床活动的积极性。颈椎手术本身有其特殊性,术后对颈部的稳定要求较高,因此此类病人活动有其特点。本研究以颈椎术后已下床活动的病人为研究对象,通过问卷调查,了解颈椎手术后病人首次下床的感受和相关需求,为进一步提高颈椎术后护理质量提供依据。1资料和方法1.1对象采用方便取样,选取2005年4月—2005年6月在某三甲医院因颈椎病入院、术后已下床活动的病人75例。其中男54例,女21例;年龄28岁~7…     

Using rare earth element tracers and neutron activation analysis to study rill erosion process.

Spatially averaged soil erosion data provide little information on the process of rill erosion. The dynamically varied data on the temporal and spatial distributions in the rill erosion process are needed to better understand the erosion process and reveal its innate characteristics. The objectives of this study were to examine the feasibility and effectiveness of rare earth element (REE) tracers and the neutron activation analysis (NAA) method on the study of the rill erosion process and to reveal quantitatively the relationships and characteristics of temporal and spatial distributions of sediment yield in rill erosion. Four REEs were used to study the changeable process of rill erosion at 4 slope positions. Four water inflow rates were applied to a 0.3 x 5 m soil bed at 3 slopes of 10.5%, 15.8% and 21.2% in scouring experiments. All of the runoff was collected in the experiment. Each sample was air-dried and well mixed. Then 20 g of each sample was sieved through 100-mesh and about a 50 mg sample was weighed for analysis of the four elemental compositions by NAA. Results indicate that the REE tracers and NAA method can be used to not only quantitatively determine soil erosion amounts on different slope segments, but also to reveal the changeable process of rill erosion amount. All of the relative errors of the experimental results were less than 25%, which is considered satisfactory on the study of rill erosion process.     

中西医结合治疗急性缺血性中风的临床研究

随着我国社会的日益老龄化，人们生活水平的不断提高和生活方式的改变，中风病的发病率逐年上升，严重危害人类生命与健康，给家庭和社会带来沉重的负担。笔者近二年来，对急性缺血性中风患者100例分别采用中西医结合治疗及单纯西药治疗，并进行了临床观察研究，现将结果报告如下。     

Fat-Derived Hormone Adiponectin Combined with FTY720 Significantly Improves Small-for-Size Fatty Liver Graft Survival

Owing to the discrepancy between organ donation and the demand for liver transplantation, expanding the liver donor pool is of vital importance. However, marginal liver grafts, such as small-for-size and/or fatty grafts, were associated with primary graft nonfunction or poor function. Therefore, novel combination therapies to rescue small-for-size fatty liver grafts should be investigated. In this study, we applied a combination therapy using a fat-derived hormone adiponectin (anti-steatosis) plus immunomodulator FTY720 (anti-inflammatory) in a rat liver transplantation model using small-for-size fatty liver grafts, and investigated the underlying protective mechanism such as anti-steatosis, intra-graft energy metabolism, hepatic microcirculatory changes, cell signaling cascades for survival, apoptosis and inflammation. The current study demonstrated that even a single treatment of adiponectin or FTY720 improved the 7-day graft survival from 0% to 62.5% (p = 0.001). The combination therapy significantly increased the 7-day graft survival rate to 100% by remarkable attenuation of graft steatosis and acute phase inflammatory response, significant activation of cell survival Akt pathway and maintenance of intra-graft adenosine triphosphate metabolism and improvement of hepatic microcirculation. In conclusion, the fat-derived hormone adiponectin combined with FTY720 might be a novel combination drug therapy for prevention of small-for-size fatty liver graft injury.     

Proteasome Inhibitors Sensitize Hepatocellular Carcinoma Cells to TRAIL

A poptosis, an evolutionarily conserved form of cell suicide, oc- curs in two physiological stages: commitment and execution.[1] It has been found that several Bcl-2 family proteins are located in the outer mitochondrial membrane, where they control relea…