白血病相关抑制物对正常人T淋巴细胞集落形成的影响

通过收集16例急性非淋巴细胞白血病(ANLL)病人的血清和外周血白血病细胞条件培养液(LCM),对血清和LCM中的白血病相关抑制物(LAI)对正常人T淋巴细胞集落(CFU-TL)形成的影响进行研究。发现16例病人的LAI对正常人CFU-TL均有抑制作用,而缓解期病人的LAI抑制作用甚弱。追踪观察11例病人:其中抑制率高于30％的6例患者治疗效果差;抑制率低于25％的5例患者治疗效果较好,达到完全缓解或部分缓解。结果提示ANLL病人的细胞免疫功能缺陷与LAI的存在有关。     

实时定量PCR检测B细胞恶性肿瘤中BCL11A基因的表达水平

目的:建立B细胞淋巴瘤/白血病BCL11A基因的定量检测方法,并分析其在B细胞恶性肿瘤中的表达水平。方法:利用实时定量RT-PCR分析B细胞淋巴瘤(18例)、B细胞性慢性淋巴细胞白血病(B-CLL,8例)、T细胞性急性淋巴细胞白血病(T-ALL,8例)和正常对照(15例)外周血单个核细胞(PBMC)中BCL11A基因的表达水平,以甘油醛-3-磷酸脱氢酶(GAPDH)基因作为内对照。结果:B-CLL组和B细胞淋巴瘤组患者PBMC中BCL11A表达水平均明显高于正常对照(P=0.000)和T-ALL组(P=0.000);T-ALL组和正常对照组BCL11A表达水平无显著差别(P=0.084);B-CLL组和B细胞淋巴瘤组BCL11A表达水平无显著差别(P=0.776)。在B细胞淋巴瘤不同的病例中,BCL11A表达水平有较大差异,其中最小值为0.04,最大值为9.70,中位值为1.00。结论:成功建立BCL11A基因的定量检测方法。     

PCR检测白血病患者外周血中EB病毒的DNA

目的：了解白血病患者ＥＢ病毒感染情况。方法：收集２１例急性淋巴细胞白血病、１例慢性淋巴细胞白血病、１５例急性粒细胞白血病、８例慢性粒细胞白血病患者及３２例正常对照组的外周血,分离单个核细胞,提取ＤＮＡ,应用ＰＣＲ方法检测ＥＢ病毒ＤＮＡ。结果：在１例初诊慢性粒细胞白血病病人样本中发现ＥＢ病毒阳性,余均为阴性。结论：白血病患者存在ＥＢ病毒感染情况,但并不普遍。     

PPP2R5C转录本在正常人和血液肿瘤病人中的分布情况

目的:建立分析不同PPP2R5C转录本检测方法,分析正常人和血液肿瘤病人中5种PPP2R5C基因转录本的表达特点.方法:根据PPP2R5C基因的结构特点,设计4对引物,利用RT-PCR方法分析9例正常人、7例T细胞-非霍奇金淋巴瘤(T-NHL)、11例B细胞-急性淋巴细胞白血病(B-ALL)和8例急性髓细胞白血病(AML)病人外周血单个核细胞(PBMC)中PPP2R5C基因的表达情况.结果:所设计的4对引物,均可在样本中扩增到预期PCR产物,其中第1对引物可扩增两个不同大小PCR产物(包含12+13+14外显子的大片段及仅含12+14外显子的小片段),而另3对对引物所扩增的产物分别为10+11+12+12a外显子,Ⅲ+2外显子和Ⅳ+2外显子的基因片段,所有PCR产物均通过核苷酸序列分析证实.结果显示所有样本均表达全部PPP2R5C转录本.结论:初步建立区分不同PPP2R5C转录本的方法,各转录本在正常人和不同血液肿瘤病人中的分布情况基本一致.     

淋系白血病中人类疱疹病毒6型的感染情况

目的 :了解淋巴系统白血病患者人类疱疹病毒 - 6型 (HHV - 6)的感染情况。方法 :患者 38例 ,包括急性淋巴细胞白血病 (ALL) 31例、慢性淋巴细胞白血病 (CLL) 4例、淋巴瘤白血病 (LL) 3例 ,正常对照 38例。取抗凝外周血 ,分离单个核细胞 ,提取DNA ,用巢式PCR方法检测目标DNA。结果 :HHV - 6DNA阳性检出率在全部患者中为 63% ,其中在ALL患者中为 68% ,均明显低于正常对照的阳性检出率 92 % (P <0 .0 5 ) ,另外 ,4例CLL患者有 1例阳性 ,3例LL患者中 2例阳性。结论 :在淋巴系统恶性疾病中HHV - 6的感染率低于正常人群 ,其临床意义有待进一步研究。     

急性白血病T淋巴细胞及其亚群的研究

应用McAb检测31例急性白血病患者外周血T细胞及其亚群的改变。结果表明总T细胞(T_1)、T辅助细胞(T_4)和T抑制细胞(T_8)百分率均明显低于正常对照组(P<0.01～0.001),且伴有T_4:T_8值的下降(P<0.05)。经化疗缓解后,部分缓解组T细胞及其亚群均恢复正常,完全缓解组T_4细胞仍稍低于正常值(P<0.05)。化疗无效组T细胞及其亚群的改变与未治疗组类似(P>0.05)。急淋T-ALL型时,外周血T细胞及其亚群的改变与一般白血病表现不同,其T细胞标记及T_4:T_8值反而增高。病情缓解时逐渐恢复正常急淋其它型患者,其T细胞及亚群的改变与急非淋患者类似。结果提示,动态观察T细胞及其亚群变化,有助于对白血病患者疗效及预后的判定。     

淋巴瘤白血病患者TCR Vβ亚家族T细胞的分布及其克隆性

目的:了解B细胞淋巴瘤白血病(LL)患者TCR Vβ亚家族T细胞的分布及其克隆性.方法:利用RT-PCR分别扩增3例LL患者外周血单个核细胞的 TC R Vβ 24个亚家族基因的CDR3,以了解患者各Vβ亚家族的利用情况,然后将阳性的PCR产物进一步经荧光素标记和基因扫描分析产物的CDR3长度,了解T细胞克隆性.结果:患者中仅存在2～6个Vβ亚家族T细胞.基因扫描分析显示,2例患者外周血中的Vβ1 、Vβ 3或Vβ4亚家族出现克隆性增殖T细胞. 结论:LL患者外周血存在倾斜性分布和克隆性增殖的Vβ亚家族T细胞,这可能是机体T细胞受白血病细胞相关抗原的刺激作用而引起机体产生相应的特异性抗白血病的免疫反应.     

成人急性白血病淋巴细胞HSP70蛋白及mRNA的表达研究

研究热休克蛋白70(HSP70)在成人急性白血病淋巴细胞中的表达。用W estern blot法检测化疗前、后及正常人HSP70的蛋白表达,RT-PCR法检测其HSP70mRNA的表达。化疗前成人急性白血病淋巴细胞HSP70蛋白表达明显低于正常人(P<0.05);其HSP70mRNA表达的灰度值为(0.112±0.005),明显低于正常(人0.198±0.002)(P<0.05);而化疗后,成人急性白血病淋巴细胞HSP70及其mRNA(0.287±0.001)明显高于正常人(0.198±0.002)(P<0.05)。HSP70在成人急性淋巴细胞白血病淋巴细胞中高表达,对癌细胞起保护作用。     

人类T淋巴细胞白血病1型病毒的感染复制及致病机制研究进展

主要针对人类T淋巴细胞白血病1型病毒(human T-cell leukemia virus type 1,HTLV-1)及其与成人T淋巴细胞白血病(adult T-cell leukemia,ATL)的关系,尤其是人类T淋巴细胞白血病1型病毒的感染、复制及致病机制进行了综述.HTLV-1属于逆转录病毒,它的感染可导致成人T细胞白血病.HTLV-1病毒主要通过细胞与细胞间接触进行传播,并通过促进其感染细胞的增殖增加病毒拷贝数.病毒基因的调控及宿主免疫系统共同决定了体内HTLV-1病毒的载量.病毒编码的HBZ和Tax蛋白在ATL发生过程中发挥着至关重要的作用,它们在功能上相互配合,共同调节病毒的复制,诱导感染细胞增殖及病毒传播.对于HTLV-1病毒与ATL关系的深入研究,将对认识病毒和宿主的相互作用及相关传染性疾病的防治带来新的启示.     

靶向多肽R8-HBAP抑制成人T细胞白血病细胞恶性增殖

成人T细胞白血病(Adult T-cell leukemia,ATL)是与人类T淋巴细胞白血病1型病毒(Human T-cell leukemia virus type 1,HTLV-1)感染密切相关的恶性淋巴细胞白血病.HTLV-1反义编码的HBZ(HTLV-1 b ZIP factor)蛋白在ATL发生过程中扮演极为重要的角色.为了寻找治疗成人T细胞白血病的方法,设计了能与HBZ蛋白形成二聚体,从而封闭HBZ蛋白功能的靶向多肽R8-HBAP.通过免疫共沉淀实验,发现R8-HBAP可以有效抑制HBZ蛋白与下游靶蛋白c-Jun的结合,报告基因实验显示,R8-HBAP能阻遏HBZ蛋白对AP-1信号通路的调控作用.MTT和流式细胞术实验发现,R8-HBAP能抑制ATL细胞的恶性增殖并促进细胞凋亡.因此,靶向多肽R8-HBAP通过阻遏HBZ蛋白的功能从而抑制白血病细胞的恶性增殖,为R8-HBAP的开发利用及成人T细胞白血病的治疗提供一定的实验依据.     

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.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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