CXCR7对HeLa细胞增殖、粘附和侵袭能力的影响

基质细胞衍生因子-1(SDF-1)在肿瘤侵袭、转移过程中起着重要的调控作用.此前认为SDF-1是通过其唯一受体CXCR4来起作用.近年来发现SDF-1还有另一作用受体——CXCR7,SDF-1/CXCR7在部分肿瘤侵袭转移过程中起重要作用,但其在宫颈癌HeLa细胞中的作用目前尚未明确.通过Western blotting检测HeLa细胞中CXCR4和CXCR7的表达,阻断CXCR4或CXCR7后,通过MTT法评价细胞增殖能力,细胞粘附实验评价细胞粘附能力,Transwell实验评价细胞侵袭能力.结果表明,CXCR4和CXCR7在HeLa细胞中表达.阻断CXCR4或CXCR7后,SDF-1诱导的HeLa细胞增殖、侵袭和与内皮细胞的粘附能力均被阻断.结果提示CXCR7在SDF-1诱导HeLa细胞增殖、侵袭和与内皮细胞的粘附过程中起着重要作用,将有望成为治疗宫颈癌转移的新靶点.     

CD_(44)拼接变异体在宫颈癌中表达及相关分析

CD44是细胞表面粘附分子，在介导淋巴细胞归集中起着重要作用，探讨CD44变异体与肿瘤转移的关系从而对预后进行预测，对指导治疗有着重要意义。本研究采用免疫组化方法检测CDu变异体V6（CD44V）在宫颈癌的的表达，发现：宫颈癌淋巴结转移组中呈明显过表达，阳性率为78．9％，结果表明CD44V与肿瘤转移密切相关。     

P-选择素与肿瘤转移

综述了P-选择素(platelet-selectin,P-selectin)与肿瘤转移的研究进展.P-选择素作为与肿瘤细胞黏附密切相关的分子,其所介导的肿瘤细胞与内皮细胞及血小板间的黏附在肿瘤的发生发展中起着至关重要的作用.P-选择素配体拮抗剂作为肿瘤转移治疗中一个安全有效的新疗法,值得进一步深入研究.     

低氧通过HIF-2α诱导CCNE2表达的初步研究

低氧是肿瘤发生侵袭转移必经的过程之一,它促进了肿瘤致癌基因的表达,从而使肿瘤细胞发生远处转移.低氧环境对于调节肿瘤的EMT过程具有重要作用,刺激肿瘤的恶化和转移,也可促进血管激活因子的表达从而促进肿瘤血管的形成.CCNE2作为调节细胞周期的关键基因,在肿瘤发生和转移过程中的作用已经得到广泛研究,在多种癌细胞中都发现CCNE2蛋白是高表达的.为此在MCF-7细胞中通过一系列的实验证明了CCNE2是一个新的低氧靶基因,并证明了低氧通过刺激HIF-2α促进了CCNE2的表达.     

低氧通过HIF-2α诱导CCNE2表达的初步研究

低氧是肿瘤发生侵袭转移必经的过程之一,它促进了肿瘤致癌基因的表达,从而使肿瘤细胞发生远处转移.低氧环境对于调节肿瘤的EMT过程具有重要作用,刺激肿瘤的恶化和转移,也可促进血管激活因子的表达从而促进肿瘤血管的形成.CCNE2作为调节细胞周期的关键基因,在肿瘤发生和转移过程中的作用已经得到广泛研究,在多种癌细胞中都发现CCNE2蛋白是高表达的.为此在MCF-7细胞中通过一系列的实验证明了CCNE2是一个新的低氧靶基因,并证明了低氧通过刺激HIF-2α促进了CCNE2的表达.     

血管内皮生长因子表达及微血管密度与头颈肿瘤发展和转移的关系

研究血管内皮细胞生因子(VBGV)的表达及微血管密度(MVD)与头颈肿瘤发展及转移的关系.应用免疫组织化学S-P法,检测32例头颈恶性肿瘤、20例头颈良性肿瘤、16例头颈部无瘤组织石蜡标本组织中的血管内皮细胞生长因子(VEGF)的表达、微血管密度(MVD).头颈恶性肿瘤组织VEGF的表达及MVD明显高于头颈良性肿瘤及头颈无瘤组织(P<0.05),转移组比较非转移组高(P<0.05).此外,在头颈肿瘤的发展及转移中VEGF的表达及MVD具有显著的正相关关系(r=0.398,<0.05).VEGF与头颈肿瘤血管生成有密切关系;VEGF的表达和MVD的增高对头颈肿瘤发展及转移有促进作用,其检测有可能作为头颈肿瘤预后的指标.     

血管内皮生长因子、微血管密度与大肠癌浸润转移及预后的关系

大肠癌是最常见消化道肿瘤之一,大多数大肠癌患者多死于肿瘤的转移与扩散,而血管新生是大肠癌恶性演变过程中最重要的环节之一,血管内皮生长因子能特异性作用于血管内皮细胞,促进其有丝分裂,使部分血管形成和增加血管通透性,在大肠癌的生长、浸润和转移过程中发挥重要作用.     

急性胰腺炎全身炎症反应中核因子κB的关系及作用

急性胰腺炎(acute pancreatitis,AP),特别是重症急性胰腺炎(severe acute pancreatitis,SAP)病情凶险,病死率高.过度活化的炎性细胞及其表达的炎症因子决定了急性胰腺炎的临床进程.近年研究证实细胞因子、粘附分子在急性胰腺炎的发病中起着非常重要的作用,     

乳腺癌血管内皮生长因子-C和微血管密度的表达及其意义

探讨乳腺癌血管内皮生长因子-C(VEGF-C)、肿瘤血管生成的表达与淋巴结转移的生物学行为关系,应用免疫组化PV9000二步法检测50例乳腺癌组织VEGF-C和微血管密度(MVD)的表达。结果表明,淋巴结转移组的VEGF-C和MVD明显高于淋巴结无转移组(p<0.05)。其中,VEGF-C阳性表达组33例,MVD值为31.67±7.85;VEGF-C阴性表达组17例,MVD值为26.84±7.03,两者之间具有相关性,差异显著(p=0.03)。乳腺癌的淋巴结转移与VEGF-C的表达、微血管密度密切相关。由此可见,VEGF-C在乳腺癌的淋巴管、血管生成中起着重要的作用,VEGF-C和MVD与乳腺癌淋巴结转移有关,并可能协同作用淋巴结转移过程。     

血管内皮生长因子(VEGF)与肝再生

血管内皮生长因子(vascularendothelialgrowthfactor,VEGF)能特异地直接作用于血管内皮细胞,刺激血管内皮细胞的分裂、增殖并诱导血管的形成.它通过与血管内皮细胞的受体结合发挥作用.肝受到各种损伤包括部分肝切除后,肝再生就得以启动.在肝再生过程中,VEGF对内皮细胞的生长增殖起有效促进作用,并且能诱导组织胶原酶、血纤维蛋白酶原的激活,增加血管的通透性,这对血管再生起着极其重要的作用.而血管再生是肝再生的一个重要组成部分,它不仅能给肝细胞提供血液支持,而且能促进肝脏结构的重构.因此VEGF在肝再生过程中具有重要的作用.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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