全反式维甲酸对脐血红系祖细胞增殖过程中HOXB6基因表达的影响

探讨脐血造血干祖细胞向红系增殖过程中HOXB6 mRNA表达及全反式维甲酸对HOXB6 mRNA表达的影响.采用体外培养技术,以全反式维甲酸持续干扰造血干祖细胞,观察集落生成情况,采用实时荧光定量PCR技术检测造血祖细胞增殖分化过程中HOXB6基因的表达水平,用DNA相对拷贝数和RNA表达相对量表示HOXB6基因相对表达量.结果表明,人类造血干祖细胞向红系祖细胞增殖分化过程中,各祖细胞HOXB6基因均表达,与正常对照组比较,全反式维甲酸可上调HOXB6基因的表达,说明HOXB6可能是造血干祖细胞向红系祖细胞正常增殖分化过程中的调控基因之一.     

As2O3对脐血红系祖细胞HOXB6基因表达的调控作用

目的：探讨脐血造血干祖细胞向红系祖细胞增殖过程中HOXB6mRNA表达及As2O3对HOXB6mRNA表达的影响．方法：①采用外培养技术,以As2O3干扰造血干祖细胞,观察HSPC经促红素诱导后,CFU-E集落生成情况．②采用实时荧光定量HR技术检测造血祖细胞增殖分化过程中HOXB6基因的表达．结果：①造血于祖细胞红系祖细胞增殖过程中,各组细胞HOXB6基因均表达,②与正常对照组比较,As2O3可下调HOXB6基因的表达．结论：①HOXB6可能是造血干祖细胞向红系祖细胞增殖分化中的调控基因之一．②As2O3能下调HOXB6基因的表达．     

低剂量辐射后小鼠骨髓造血干、祖细胞的蛋白质组学研究

本文利用双向凝胶电泳方法建立低剂量辐射后不同时间点小鼠骨髓造血干、祖细胞与相应假照组细胞蛋白质组二维凝胶电泳图谱,用图像分析软件分析照射组与假照组差异表达蛋白,并利用MALDI-TOF-MS生物质谱对差异蛋白质进行鉴定分析.结果表明低剂量辐射后骨髓造血干、祖细胞中表达上调的蛋白26个,表达下调的蛋白4个,消失的蛋白4个.其中碳酸酐酶II、蛋白二硫键异构酶、层粘连蛋白受体、嘌呤核苷磷酸化酶、谷胱甘肽过氧化物酶、氯化琥珀胆碱细胞内信号通道蛋白、中心体肌动蛋白-α、磷酸葡萄糖脱氢酶、原纤维蛋白、丝氨酸蛋白酶抑制剂等22种蛋白被鉴定出来.研究表明低剂量辐射使骨髓造血干、祖细胞某些蛋白表达上调或下调,并鉴定出与低剂量辐射作用机制相关的蛋白质.从新的视角探讨了低剂量辐射对造血系统的作用机制,同时也为低剂量辐射作用机制的研究提供了一种新的有效的研究手段.     

失血性贫血小鼠恢复过程中骨髓基质金属蛋白酶变化

目的:观察失血性贫血小鼠恢复过程中骨髓基质金属蛋白酶-2和-9(MMP-2,MMP-9)的变化,并探讨其在造血调控中的作用.方法:采用全自动血细胞分析仪、免疫组化和酶谱电泳法分别检测失血性贫血小鼠恢复过程中外周血RBC和Hb数量、骨髓细胞MMP-2和MMP-9表达以及骨髓造血微环境MMP-2和MMP-9的活性变化.结果:(1)与正常对照组相比外周血RBC和Hb数量失血后第1d急剧下降.随着恢复时间的延长,二者数目逐渐上升,到第9d已接近正常对照组水平.(2)在正常对照组检测到了较弱的MMP-2和MMP-9的表达.与正常对照组相比,失血后1d组、3d、5d和7d组小鼠骨髓细胞中MMP-2和MMP-9表达明显增加,MMP-2和MMP-9表达分别于失血后5d和3d达到峰值.与1d组相比,3d组小鼠骨髓细胞中MMP-2和MMP-9表达以及5d组小鼠骨髓细胞中MMP-2表达明显增加.(3)正常对照组中检测到proMMP-2,proMMP-9和MMP-9 3条酶带,MMP-9的活性最强.失血后1d,proMMP-2,proMMP-9和MMP-9的活性均急剧升高.随着恢复时间的延长,3者的活性逐渐降低,到第9d时恢复到接近正常对照组水平.结论:失血性贫血小鼠可能通过骨髓细胞中MMPs表达增加以及骨髓造血微环境中MMPs活性升高来促进骨髓造血功能增强,使外周血RBC和Hb的数量恢复到正常水平.     

补肾和解复方对再障患者CD34+细胞造血干/祖细胞调节作用的实验研究

目的:探索补肾和解方对再障患者CD34 造血干/祖细胞的刺激增殖和诱导分化作用.方法:采用免疫磁珠法(MACS)分离纯化再障患者骨髓CD34 细胞,造血细胞半固体和液体培养体系加入不同度补和解方制剂,检测对CD34 造血干/祖细胞增殖,形成祖细胞集落的提高率,并用流式细胞仪检测液体培养后细胞表面标记的变化.结果:补肾和解复方制剂(5～100μg.mL)能提高BFU-E、CFU-E、CFU-GEMM集落产率,补肾和解复方制剂50μg/mL是液体培养刺激CD34 细胞体外增殖的最佳浓度.补肾和解复方制剂诱导细胞14天后,细胞表面表达CD334 细胞随补肾和解复方制剂的浓度升高而增加,在补肾和解复方制剂的浓度升高而增加,在补肾和解复方制剂100μg/mL时以CD15 细胞数最高,CD71 细胞和G-A 细胞数仅在50μg/mL高于未加补肾和解复方制剂的对照组.结论:补肾和解复方制剂不但能促进再障患者CD34 造血干/祖细胞的增殖,并且能诱导定向分化,具有类生长因子和协同生长因子的作用.     

小鼠颌下腺合成造血相关细胞因子的研究

作者对小鼠颌下腺合成的与造血相关的细胞因子进行了研究 ,免疫组化研究结果显示 ,正常雄性和雌性小鼠颌下腺部分分泌导管的上皮细胞有bFGF ,IGF Ⅱ免疫活性 ,说明小鼠颌下腺导管的上皮细胞能生成上述细胞因子 ;小鼠颌下腺未能显示EPO ,GM CSF ,IL 6免疫活性 ,提示小鼠颌下腺没有生成上述因子或生成量达不到可检出水平 .RT PCR检测结果显示 ,所有小鼠颌下腺样本均有bFGF ,IGF ⅡmRNA的表达 ;10例样本有 3例有IL 6mRNA的表达 .所有样本均未检测到EPO ,GM CSF ,TPOmRNA的表达 .上述结果提示 ,小鼠颌下腺似乎可能不是通过分泌EPO ,GM CSF ,TPO来促进造血 ,而可能通过分泌其它已知 (bFGF ,IGF Ⅱ及IL 6 )或未知的细胞因子促进造血 .     

TNF-α、INF-γ和EPO与肿瘤伴ACD造血功能低下的相关性

目的:探讨肿瘤坏死因子α(TNF-α)、干扰素γ(INF-γ)和红细胞生成素(EPO)对肿瘤伴慢性病贫血(ACD)造血功能的影响.方法:检测肿瘤患者铁代谢参数;ELISA法检测患者血清TNF-α、IFN-γ和EPO水平;观察3种细胞因子及患者血清对骨髓红系集落生成单位(CFU-E)生成的影响.结果:肿瘤伴ACD患者血清EPO水平高于正常对照,而低于IDA患者;血清TNF-α、IFN-γ水平显著升高,且与血球压积、血清铁水平负相关;TNF-α、IFN-γ可抑制正常骨髓CFU-E生成,患者血清可抑制自身骨髓CFU-E生成,rhEPO可部分纠正细胞因子对CFU-E的抑制.结论:TNF-α、IFN-γ和EPO与肿瘤伴ACD造血功能低下有关.     

外周血内皮祖细胞在去细胞猪主动脉瓣膜上种植的体外观察

为在体外观察外周血内皮祖细胞种植到去细胞猪主动脉瓣上的生长情况.采用TritonX-100联合胰蛋白酶、核酸酶去除猪主动脉瓣膜细胞.从志愿者外周血中分离培养内皮祖细胞,免疫荧光鉴定细胞后.将从外周血培养的EPC种植到去细胞猪主动脉瓣膜上,用HE、免疫组化染色和免疫荧光染色观察种植效果.结果显示猪主动脉瓣内的细胞去除彻底,但纤维支架保存良好.人外周血培养出的细胞,免疫荧光染色示ac-LDL和UEA-1阳性,提示为内皮祖细胞,种植后行HE染色可见到去细胞猪主动脉瓣膜表面单层内皮细胞生长,并且表达von Willebrand因子和CD31.     

基于抗炎和促红细胞生成作用的九味补血口服液改善血虚证小鼠造血功能的机制研究

为探讨九味补血口服液改善血虚证小鼠造血功能的作用及机制,采用超高效液相色谱串联四级杆飞行时间质谱(UPLC-Q-TOF-MS/MS)技术鉴定九味补血口服液中的化学成分;利用蛋白互作和网络分析手段筛选九味补血口服液治疗贫血的关键网络靶点,并对关键网络靶点进行基因本体(GO)分析、京都基因与基因组百科全书(KEGG)通路富集分析;同时采用分子对接技术将潜在活性成分与关键网络靶点对接,评估活性分子与靶点的结合能力。在动物实验中,采用环磷酰胺建立小鼠血虚模型,设立对照组和模型组,复方阿胶浆口服液组(30 mL/kg)及九味补血口服液高、中、低剂量组(10.0、5.0、2.5 mL/kg),每天灌胃给药1次,连续32 d。检测全血中红细胞(RBC)、血红蛋白(HGB)和红细胞压积(HCT)水平,并利用qRT-PCR法和免疫印迹法对关键靶点及通路在血虚证小鼠肾脏的表达进行验证。结果显示,在91种鉴定的九味补血口服液化学成分中,满足口服生物利用度(OB)≥30%和药物相似性(DL)≥0.18的条件,且具有相应靶点的潜在活性成分共计15个。分析九味补血口服液成分-血虚疾病靶点网络,获得九味补血口服液治疗贫血的关键靶点15个,主要富集于核因子-κB (NF-κB)信号通路(NF-κB signaling pathway)、代谢通路(Metabolic pathway)、缺氧诱导因子-1(HIF-1)信号通路(HIF-1 signaling pathway)、Toll样受体信号(Toll-like receptor signaling pathway)通路等。分子对接结果显示,甘草苷、橙皮素与Toll样受体4(TLR4)具有强烈的结合能力。动物实验结果显示,与对照组相比,血虚证小鼠RBC、HGB和HCT水平明显降低,TLR4/NF-κB p65介导的炎性信号增强,缺氧诱导因子-1α (HIF-1α)/促红细胞生成素(Erythropoietin,EPO)介导的促红细胞生成信号受抑制(P<0.05或P<0.01)。与模型组相比,九味补血口服液各剂量组可显著升高血虚证小鼠RBC、HGB和HCT水平,不同程度地逆转TLR4、NF-κB p65变化,并上调HIF-1α、EPO mRNA或蛋白的表达水平(P<0.05或P<0.01)。因此,九味补血口服液可以改善血虚证小鼠的贫血状态,其机制可能与促进肾脏中HIF-1α/EPO介导的促红细胞生成作用、减少TLR4/NF-κB p65介导的肾脏炎症反应相关。     

穿心莲内酯对小鼠T淋巴细胞体外活化、增殖及细胞周期的影响

目的:研究穿心莲内酯对小鼠T淋巴细胞体外活化、增殖及细胞周期的影响,并对其免疫调节作用进行初步探讨.方法:分离小鼠淋巴结细胞,以双色荧光抗体染色技术结合流式细胞术检测在刀豆蛋白A(Con A)的刺激下,穿心莲内酯对T淋巴细胞早期活化抗原CD69表达的影响;用羧基荧光素乙酰乙酸(CFDA-SE)染色分析穿心莲内酯对T淋巴细胞增殖的影响;用碘化丙锭染色分析细胞周期的分布.结果:终浓度为10、20、30、40 μmol/L的穿心莲内酯对Con A刺激的早期活化抗原CD69的表达具有明显的抑制作用(P<0.01);对Con A刺激的T淋巴细胞增殖具有明显的抑制作用(P<0.01);并明显阻止T淋巴细胞进入S期,且呈剂量依赖性.结论:穿心莲内酯对小鼠T淋巴细胞的体外活化及增殖均具有明显的抑制作用,并抑制T淋巴细胞进入分裂周期.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has