生姜醇提物抗肿瘤作用的实验研究

目的研究生姜醇提物对H22实体瘤、S180腹水瘤的生长抑制作用和对荷瘤小鼠免疫调节作用。方法小鼠接种H22实体瘤或S180腹水瘤后随机分组,灌胃给予不同剂量[100、200、400nlg/（kg·d）]的生姜醇提物,以生理盐水和环磷酰胺为空白对照组和阳性对照组,计算生姜醇提物对小鼠H22实体瘤生长的抑制率,脾脏指数和胸腺指数,以及S180腹水型荷瘤小鼠的存活时间。结果给予生姜醇提物灌胃的荷瘤小鼠的脾脏指数和胸腺指数显著增加;低、中、高剂量的生姜醇提物对H22实体瘤的抑瘤率分别是34.90%、43.42%、56.23%;中、高剂量的黄精多糖可以显著延长S180腹水型荷瘤小鼠的存活时间。结论生姜醇提物有显著的抗肿瘤作用和免疫调节活性。     

3种仙人掌多糖抗肿瘤作用的研究

研究3种仙人掌多糖对S180、H22荷瘤小鼠的抗肿瘤作用.通过腹腔注射给药,以抑瘤率、生命延长率及胸腺指数和脾指数为指标比较3种仙人掌多糖对荷瘤小鼠(S180和H22)的抑瘤作用.结果表明,3种多糖(食用仙人掌、药用仙人掌、仙人球)对S180荷瘤小鼠肿瘤有抑制作用,最大抑瘤率分别为46 38%,33 82%,36 23%;其对H22荷瘤小鼠有延长存活时间的作用,最大生命延长率分别为56 98%,45 53%,78 89%;另外,除药用仙人掌多糖低剂量组(50mg/kg)的胸腺指数及脾指数与生理盐水组无差异外(P>0 05),其他各多糖组的胸腺指数及脾指数均与生理盐水组及5-Fu组有显著差异(P<0 05,P<0 01).     

竹节参总皂苷的抗肿瘤作用和毒性研究

为评价竹节参总皂苷对移植性H22荷瘤小鼠的肿瘤抑制作用和对其免疫系统的毒性,用SPF级雄性小鼠接种肝癌H22瘤株建立移植性肝癌H22小鼠模型,观察不同剂量的竹节参总皂苷对移植性H22荷瘤小鼠给药12d后的抑瘤率、小鼠体重和免疫器官指数.结果表明:40,80,160 mg/kg竹节参总皂苷对移植性H22荷瘤小鼠的抑制率分别为30.7％,38.6％,48％,竹节参总皂苷能增加H22荷瘤小鼠小鼠体重,但对其免疫系统无明显毒性.说明竹节参总皂苷具有较显著的抗肿瘤作用,可成为抗癌新药.     

新生牛肝中低分子抑瘤物体内抑瘤作用的研究

采用离子交换柱分离分子量小于1.0 kD的新生牛肝提取液,得到9份样品.在体外抑制肿瘤细胞增殖的基础上,选用体外抑瘤明显的离子交换柱层析获得的〈5〉组分进行体内对荷S-180肉瘤小鼠的肉瘤生长抑制实验.并从白细胞数、胸腺指数和脾指数三个角度分析了低分子抑瘤物对荷瘤小鼠免疫功能的影响;同时用斑点印记法,比较荷瘤前后重要脏器和肉瘤细胞内p27/k ip1细胞周期调控蛋白表达水平的变化.实验结果表明低分子新生牛肝提取液和经离子交换柱层析分离得到的〈5〉组分对荷S-180肉瘤小鼠的肉瘤生长有明显的抑制作用,实验同时发现来源于新生牛肝中的低分子抑瘤物,可通过增强荷瘤小鼠的免疫力,升高肉瘤细胞中的p27/k ip1蛋白表达水平的方式抑制肉瘤细胞的增殖,阻碍瘤细胞向正常组织的浸润和转移.     

龙葵多糖对荷瘤小鼠脾指数和胸腺指数的影响

研究龙葵多糖对荷瘤小鼠脾指数和胸腺指数的影响,从免疫学角度初步探讨龙葵多糖的抗肿瘤药效学作用.实验采用MTT法观察龙葵多糖对Hep G-2和SGC-7901两种人肿瘤细胞的生长抑制作用.测定S180小鼠瘤重,H22荷瘤小鼠生存时间以及胸腺指数、脾指数等.实验结果表明龙葵多糖对Hep G-2细胞和SGC-7901细胞的IC50分别为189.60μg/m L和186.56μg/m L.龙葵多糖能够显著降低S180荷瘤小鼠平均瘤重,与阴性对照组比较具有显著性差异(P0.01),龙葵多糖能明显延长H22荷瘤小鼠的生存时间(P0.05或P0.01),显著提高荷瘤小鼠的胸腺指数和脾指数(P0.05或P0.01).表明龙葵多糖的肿瘤作用是通过改善机体免疫力实现的,而不是通过细胞毒作用发挥的.     

胸腺素对增强Sarcoma180小鼠免疫力的研究

本文报道小鼠荷瘤后,随肿瘤细胞的增长,瘤鼠体重、瘤重、脾重及脾细胞数/克,胸腺重及胸腺细胞数/克,有丝分裂指数的变化,并用~3H-TdR掺入法测定胸腺淋巴细胞在ConA作用下的淋转反应,从酵母多糖混合玫瑰花形成试验观察胸腺淋巴细胞亚群的动态变化;同时,观察外源性胸腺素在胸腺淋巴细胞增殖速度和抑癌观察中的作用,结果表明:外源性胸腺素对S_(180)小鼠胸腺淋巴细胞具有增殖作用,并提高瘤鼠免疫力,从而抑制瘤细胞的增殖。     

酒制对瑞香狼毒抗肿瘤活性及毒性反应的影响

实验对比了瑞香狼毒(stellera chamaejasme)生药和酒制品的体内抑瘤活性及毒性反应差异,并对其抑瘤机制进行了初步探讨.以灌胃的给药方式,对比不同浓度的酒制及生药瑞香狼毒溶液对小鼠S180皮下移植瘤的抑制作用.采用免疫组化法检测肿瘤组织Ki-67、Caspase-3的表达水平,探讨药物的抑瘤作用机制.结果表明:酒制瑞香狼毒组与生药组相比,抑瘤率有显著性差异(P<0.05);与空白对照组相比,酒制组脾指数、胸腺指数无统计学差异(P>0.05);酒制瑞香狼毒组S180荷瘤小鼠肿瘤组织中的Ki-67的表达显著下降(P<0.01),Caspase-3的表达增强(P<0.01).因此,酒制能增强瑞香狼毒对S180荷瘤小鼠的抑瘤活性,同时能减轻生药对小鼠脾指数的影响;其抗肿瘤作用机制可能与S180细胞中Ki-67的表达下降以抑制其增殖,Caspase-3的表达增强以促进细胞凋亡有关.     

有氧运动结合黄芪多糖对小鼠Lewis肺癌免疫调节研究

探究有氧运动结合不同剂量黄芪多糖对肺癌小鼠免疫调节机制。将Lewis肺癌细胞接种C57BL/6小鼠右侧腋下作为荷瘤模型,荷瘤小鼠被随机分为模型组,阳性药组(环磷酰胺,20 mg/kg),黄芪多糖高(400 mg/kg)、低(100mg/kg)剂量组,黄芪多糖高剂量(400 mg/kg)辅助游泳运动30 min组,黄芪多糖低剂量(100 mg/kg)辅助游泳运动30 min组,每组10只小鼠。通过计算公式统计各组小鼠的胸腺指数和脾指数,用蛋白免疫印迹法检测瘤块中RORγt和FOXP3蛋白的表达,流式细胞法检测外周血CD4+/CD8+的水平,免疫组化法检测瘤块中IDO的表达。实验结果表明:黄芪多糖能显著稳定增加小鼠脾脏指数(P <0.05),保持胸腺指数稳定;阳性药组显著抑制脾脏和胸腺的生长(P <0.05);有氧运动结合黄芪多糖组可显著降低RORγt的蛋白和m RNA水平(P <0.05),能有效地提高FOXP3的蛋白和mRNA水平(P <0.05)。有氧运动结合黄芪多糖可有效有氧调节肺癌小鼠的免疫,为有氧运动结合黄芪多糖的临床应用提供了依据,也为肿瘤的治疗提供了新的思路。     

桑黄菌丝体对H22荷瘤小鼠肿瘤生长的影响

观察桑黄菌丝体对荷H22小鼠实体瘤生长的影响,探讨其抑瘤作用。采用小鼠移植瘤模型,随机分为5组,分别为荷瘤对照组、环磷酰胺对照组、桑黄菌丝体6.0 g/kg,3.0g/kg,1.5 g/kg剂量组,灌胃给药10 d后对荷瘤小鼠瘤重进行测量。桑黄菌丝体6.0,3.0,1.5 g/kg剂量对荷H22小鼠实体瘤3批小鼠的平均抑瘤率分别为43.6%,36%,26%。结果表明该品6.0,3.0 g/kg剂量组3批试验对荷H22小鼠实体瘤的平均抑瘤率达到30%以上,且重复性良好,说明桑黄菌丝体具有明显的抑瘤作用。     

扶正升血颗粒对荷H22瘤小鼠免疫功能影响的实验研究

目的:通过观察扶正升血颗粒对荷H22瘤小鼠免疫器官(胸腺、脾脏)重量、脾淋巴细胞增殖活性及细胞因子(IL-2)分泌的影响,探讨扶正升血颗粒对荷瘤小鼠免疫系统的调节作用.方法:采用荷H22(肝癌)实体瘤小鼠模型,用免疫器官重量法计算胸腺指数(TI)和脾脏指数(SI),用MTT比色法测定淋巴细胞增殖反应,用双抗体夹心ELISA法测定脾淋巴细胞培养上清液中IL-2的浓度.结果:扶正升血颗粒大、中、小剂量组荷瘤小鼠胸腺指数、脾脏指数均高于模型组,其中大剂量组TI、SI分别为18.9mg/10g、76.3mg/10g,较模型组分别增长36.0％、17.9％(p＜0.05);中剂量组TI为18.0mg/10g,较模型组增长29.5％(p＜0.05).扶正升血颗粒各剂量组荷瘤小鼠脾淋巴细胞增殖活性均高于模型组,以大剂量组作用最优,与模型组比较有显著性差异(p＜0.05).扶正升血颗粒各剂量组小鼠脾淋巴细胞培养上清液中IL-2的浓度均较模型组增高,大剂量组IL-2的浓度为61.6pg/ml,与模型组比较有显著性差异(p＜0.05).结论:扶正升血颗粒对荷H22瘤小鼠免疫器官胸腺、脾脏具有增重作用,能够增强脾淋巴细胞增殖活性,促进荷瘤小鼠细胞因子IL-2的分泌,表明扶正升血颗粒能明显增强荷瘤小鼠机体的免疫功能.     

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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