保肝Ⅰ号抗CCl4联合高脂饲料所致大鼠肝纤维化研究

研究保肝Ⅰ号（BGYH）对四氯化碳（CCl₄）和高脂饮食联合诱导的大鼠肝纤维化的治疗作用. 40% CCl₄-大豆油灌胃联合高脂饲料建立肝纤维化模型. 建模结束后模型组重新分组后用BGYH高、中、低剂量灌胃连续治疗17 d,进行肝脏病理和血清学检测. 检测结果表明BGYH能够减轻肝纤维化大鼠的脂肪变性和组织增生,降低肝纤维化模型大鼠血清中谷草转氨酶（AST）、谷丙转氨酶（ALT）含量,增加血清白蛋白（ALB）,降低血清中透明质酸（HA）,肝脏中羟脯氨酸（Hyp）和Ⅰ型胶原蛋白（Col Ⅰ）的. BGYH能够降低肝纤维化大鼠肝脏中的转氨酶水平,保护肝功能,减轻肝脏脂肪变性和纤维组织增生,具有显著抗肝纤维化的作用.      

羊耳菊水提物对CCl4、D-GaLN致小鼠急性肝损伤的保护作用

为研究羊耳菊水提物对CCl_4、D-GalN致小鼠急性肝损伤的保护作用。通过腹腔注射0. 08%CCl_4花生油溶液建立小鼠急性肝损伤模型,测定小鼠血清中天门冬酸氨基转移酶(AST)、丙氨酸氨基转移酶(ALT)含量,肝匀浆中总超氧化物歧化酶(SOD)、谷胱甘肽-过氧化物酶(GSH-Px)活力,以及肿瘤坏死因子-α(TNF-α)、白介素-1(IL-1)的含量; HE染色肝切片,显微镜观察肝组织病理改变;腹腔注射D-GalN(500 mg/kg)花生油溶液建立小鼠急性肝损伤模型,测定小鼠血清中AST、ALT含量。结果表明:羊耳菊水提液可降低CCl_4所致小鼠急性肝损伤小鼠血清中ALT、AST含量(P 0. 01),升高肝匀浆中SOD、GSH-Px活力(P 0. 01或P 0. 05)及降低TNF-α、IL-1的含量(P 0. 05);病理切片显示,羊耳菊三个剂量组动物肝细胞坏死、变性,细胞浆聚集及炎症细胞的浸润程度均较模型组减轻。羊耳菊水提液也可降低D-GalN所致小鼠急性肝损伤小鼠血清ALT、AST含量(P 0. 01或P 0. 05)。可见羊耳菊水提物对CCl_4、D-GalN所诱导的小鼠急性肝损伤具有一定的保护作用。     

桑葚总多糖对对乙酰氨基酚诱导小鼠急性肝损伤的保护作用

目的:研究桑葚总多糖(MFP)对APAP引起的HepG2肝细胞毒性的缓解效应,探讨MFP对APAP诱导小鼠急性肝损伤的保护作用及可能机制.方法:采用MTT法检测MFP对细胞活力的影响,将32只小鼠随机分为正常组、模型组、MFP低、高剂量组(50, 150 mg·kg~(-1)),腹腔注射300 mg·kg~(-1) APAP建立小鼠急性肝损伤模型,检测血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)和乳酸脱氢酶(LDH)活力,肝组织中丙二醛(MDA)、还原型谷胱甘肽(GSH)、总超氧化物歧化酶(T-SOD)和总抗氧化能力(T-AOC)水平;用ELISA测定肝组织中肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)和白细胞介素-6(IL-6)水平;HE染色法观察肝脏组织的病理学变化;用Western blot检测小鼠肝组织中核因子-κB(NF-κB)p65、血红素加氧酶(HO-1)和葡萄糖-6-磷酸脱氢酶(G6PD)的表达水平.结果:MFP可剂量依赖性地缓解APAP诱导的HepG2细胞死亡(P<0.01).与模型组相比,MFP能显著地降低肝损伤小鼠血清中ALT, AST, LDH水平(P<0.05或P<0.01),下调肝组织中MDA, TNF-α, IL-1β, IL-6的含量(P<0.05或P<0.01),改善APAP诱导的小鼠肝组织病变.此外,MFP还能明显上调模型小鼠肝组织中GSH, T-SOD, T-AOC水平(P<0.05或P<0.01),明显下调NF-κB p65蛋白的表达水平(P<0.05或P<0.01),上调HO-1和G6PD蛋白的表达水平(P<0.05或P<0.01).结论:MFP能保护APAP诱导的小鼠急性肝损伤,这与增强肝脏抗氧化能力,抑制肝脏炎症反应有关.     

一种新的粒毛盘菌多糖对小鼠急性肝损伤的保护作用

为了研究一种新的粒毛盘菌YM38多糖(LEP-1a)对顺铂诱导急性肝损伤的保护作用，文章将ICR小鼠随机分为正常组、模型组、阳性组、LEP-1a低剂量组(100 mg/kg)、LEP-1a高剂量组(200 mg/kg)共5组，每组6只。给予顺铂(45 mg/kg)建立急性肝损伤模型，测定小鼠各项生理指标。结果表明：与模型组相比，LEP-1a能够显著降低小鼠肝指数以及肝组织中甘油三酯(TG)、总胆固醇(TC)、谷丙转氨酶(ALT)、谷草转氨酶(AST)、碱性磷酸酶(AKP)、丙二醛(MDA)和过氧化氢酶(CAT)的水平，增强超氧化物歧化酶(SOD)的活性；抑制血清中炎性因子肿瘤坏死因子-α(TNF-α)和白细胞介素-1β(IL-1β)的表达水平，减轻肝组织中炎性细胞浸润。因此，LEP-1a通过抑制氧化应激和炎症反应从而对顺铂诱导的急性肝损伤起到保护作用。     

藏药波棱瓜子总木脂素对刀豆球蛋白(ConA)致免疫性肝损伤小鼠保护作用及其机制探讨

目的:波棱瓜子是常见的用于治疗肝病的藏药,疗效确切.前期研究表明,总木脂素是波棱瓜子抗肝损伤的有效部位,但疗效尚不明确.本研究拟考察藏药波棱瓜子总木脂素对ConA致小鼠免疫性肝损伤的保护作用,并进一步探讨其对抗肝损伤的作用机制.方法:采用尾静脉注射一次性ConA(20mg/kg)诱发小鼠免疫性肝损伤,造模8h后取血样和肝脏,考察不同剂量的波棱瓜子总木脂素对各组小鼠脏器系数、血清丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)、碱性磷酸酶(ALP)、骨过氧化物酶(MPO)、一氧化氮(NO)、一氧化氮合酶(NOS)及肝组织匀浆中超氧化物歧化酶(SOD)、丙二醛(MDA)、谷胱甘肽过氧化物酶(GSH-Px)等生化指标活力或水平的影响;以HE染色对肝组织进行组织病理学检查;免疫组织化学法检测波棱瓜子总木脂素对各组小鼠肝脏中肿瘤坏死因子-α(TNF-α)、干扰素-γ(IFN-γ)、白细胞介素-4(IL-4)、白细胞介素-10(IL-10)、核转录因子-κB(NF-κB)表达的影响.结果:波棱瓜子总木脂素可以降低ConA所致免疫性肝损伤小鼠肝脏系数及血清ALT、AST、ALP活力,显示出较好的保肝作用.同时波棱瓜子总木脂素也可降低肝损伤小鼠血清NO水平和MPO、NOS活力,并减少肝组织匀浆中MDA的含量,增强SOD和GSH-Px活性,表现出良好的抗氧化作用;免疫组化结果显示,波棱瓜子总木脂素还能抑制诸如TNF-α、IFN-γ、IL-4、NF-κB等促炎症因子的表达,促进抗炎症因子IL-10的表达,从而抑制肝脏炎症反应而发挥其保肝作用.病理观察结果也表明,波棱瓜子总木脂素能减轻ConA对肝组织的损伤.结论:波棱瓜子总木脂素对ConA致小鼠免疫性肝损伤都具有一定的保护作用,其保肝作用可能与其抗炎、抗氧化能力有关.     

小鼠腹腔注射卡介苗加脂多糖建立急性免疫性肝损伤的实验研究

目的比较卡介苗(BCG)加脂多糖(LPS)小鼠腹腔注射和尾静脉注射建立急性免疫性肝损伤模型的优劣。方法用不同剂量BCG和LPS腹腔注射诱导昆明小鼠建立急性免疫性肝损伤模型,与BCG 0.5 mg/只和LPS 7.5μg/只联合尾静脉注射诱导昆明小鼠建立急性免疫性肝损伤模型比较;以小鼠血清丙氨酸转氨酶(ALT)和天冬氨酸转氨酶(AST)水平变化及肝脏病理学检查指标作为肝损伤判断标准。结果BCG+LPS小鼠腹腔注射所造急性免疫性肝损伤模型,ALT和AST随注射剂量增加均逐步增高;第6组(BCG 0.5 mg/只+LPS7.5μg/只)和第13组(BCG1 mg/只+LPS15μg/只)相对较高。与空白组比较,ALT升高约3倍,AST升高1~3倍;肝组织病理损伤则随着BCG和LPS剂量增加逐渐升高。第5组大部分小鼠出现Ⅰ级或Ⅰ级以上肝细胞损害;第13组大部分小鼠出现Ⅱ级或Ⅱ级以上肝细胞损害。但与尾静脉注射造模相比,小鼠腹腔注射造模肝细胞损伤的特异性实验室指标ALT和AST表达不高,肝组织病理损伤较轻。结论"BCG+LPS"小鼠尾静脉注射建立急性免疫性肝损伤模型优于腹腔注射建立免疫性肝损伤模型。     

RDP-p53融合蛋白对小鼠炎症细胞因子的影响

研究不同剂量RDP-p53融合蛋白对小鼠炎症细胞因子的影响。通过大肠杆菌Rosetta表达蛋白并纯化,SDS-PAGE确定RDP-p53融合蛋白准确性。同时,将昆明小鼠分为空白对照组和RDP-p53融合蛋白高、中、低剂量组,经腹腔注射给药,摘眼球取血,用酶联免疫吸附法(ELISA)测定血清中白细胞介素1β(IL-1β)、白细胞介素6(IL-6)和肿瘤坏死因子α(TNF-α)的含量。RDP-p53融合蛋白在上清和沉淀中均获得表达。ELISA测定结果表明,与对照组比较,低、中剂量组小鼠血清炎症因子水平没有明显变化(P0.05),高剂量组的IL-1β和TNF-α含量显著升高(P0.05)。成功制备RDP-P53融合蛋白,并为进一步研究RDP-p53融合蛋白抗神经胶质瘤药理作用时给药剂量的确定提供了实验依据。     

夏枯草对四氯化碳肝损伤小鼠的保护作用

将60只小鼠随机分为空白对照组、模型对照组和三个给药组.给药组按0.5、1、2g/kg的剂量灌胃,空白组和模型组以等体积的生理盐水灌胃,每天一次.给予药物第15 d将各组动物隔夜禁食16 h(自由饮水)后,模型组和给药组按10mL/kg剂量腹腔注射1％四氯化碳(用植物油稀释),空白对照组注射等量的植物油.造模24 h后,摘取眼球取血,按试剂盒的方法分别检测各组小鼠血清中的谷丙转氨酶(ALT)、谷草转氨酶(AST)的活性,及肝组织匀浆中丙二醛(MDA)、超氧化物歧化酶(T-SOD)的水平,并进行肝组织病理学镜检.结果表明:夏枯草水提物显著降低因四氯化碳所致的急性肝损伤小鼠血清中ALT、AST的活性,降低小鼠肝匀浆MDA的水平,升高T-SOD活性,肝组织病理学镜检接近于空白组.夏枯草水提物对四氯化碳诱导的小鼠急性肝损伤具有一定的保护作用.     

油橄榄叶提取物对非酒精性脂肪肝的保护作用

观察油橄榄叶提取物(OLE)对非酒精性脂肪肝(NAFLD)的防治作用。用高脂饮食9周建立小鼠NAFLD模型,造模第2周起用OLE(250,500,1000 mg/kg)进行灌胃治疗8周,利用生物显微技术观察肝脏组织结构的变化,全自动生化分析仪检测血清甘油三酯(TG)、胆固醇(CHOL)、谷丙转氨酶(ALT)、谷草转氨酶(AST)水平,用放射免疫法检测肝脏肿瘤坏死因子α(TNF-α)、白细胞介素1(IL-1β)、白细胞介素10(IL-10)含量,比色法检测肝脏超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽还原酶(GR)活性及丙二醛(MDA)含量。研究结果显示,与模型组比较,OLE治疗后,血清TG、CHOL、ALT、AST水平降低;肝脏TNF-α、IL-1β、MDA的含量显著降低,IL-10、SOD、CAT、GR水平均显著升高,肝组织损伤明显减轻。OLE可改善肝脏脂质代谢,减少自由基损伤,缓解肝脏脂肪变性和炎症因子反应,抑制NAFLD的进展。     

单增李斯特菌致流产小鼠子宫中Th1和Th2细胞因子的变化

为探讨Th1和Th2细胞因子在单增李斯特菌(Listeria monocytogenes,LM)致小鼠流产中的作用,用LM感染妊娠小鼠和小鼠巨噬细胞,统计胚胎存活率,酶联免疫测定(enzyme linked lmmuno sorbent assay,ELISA)小鼠子宫组织中和巨噬细胞培养基中主要的Th1和Th2细胞因子水平.结果显示,LM诱导的流产小鼠子宫中Th1细胞因子水平显著增加,溶血素O(listeriolysin O,LLO)基因缺陷型(Δ hly)LM感染组胚胎存活率和子宫中Th1、Th2细胞因子水平无显著变化;LM感染的巨噬细胞分泌的Th1细胞因子和白细胞介素-4(interleukin, IL-4)水平显著增加,IL-10水平显著降低,Δ hly LM感染组Th1和Th2细胞因子水平无显著变化.因此,LM感染后子宫中Th1/Th2细胞因子失衡诱导了小鼠流产,这可为临床防治LM诱导的流产提供科学依据.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.