Simvastatin与rhG—CSF促进兔颈总动脉球囊损伤后内膜修复的实验研究

目的：观察辛伐他汀及重组人粒细胞集落刺激因子（rhG—CSF）在兔颈总动脉内膜损伤后对血管壁变化及外周血中CD34＋细胞含量的影响。方法：雄性新西兰大白兔48只,随机均分为：单纯损伤组,辛伐他汀组,rhG—CSF组及辛伐他汀和rhG—CSF联合组（简称联合组）,建立兔左颈总动脉内膜球囊导管损伤模型,术后给予辛伐他汀（10mg／kg／d经胃灌入）及rhG．CSF（100μg／a皮下注射）干预治疗,每组分别于术前1d、术后7d、14d、21d、28d抽取静脉血2ml,经流式细胞仪检测外周血中CD34＋细胞含量;4周后处死所有动物取损伤段血管,弹力纤维染色,计算内膜厚度、中膜厚度、管腔面积（S）、内膜面积（si）、中膜面积（Sm）TLSi／Sm比值评价血管再狭窄程度。结果：①术前4组之间相比外周血CD34＋细胞含量无明显差异（P〉0．05）;术后7d时各组外周血CD34＋细胞含量最高,后逐渐下降,28d较低,但仍高于术前含量;rhG—CSF组及联合组与对照组相比外周血CD34＋细胞明显增多（P〈O．01,P〈0．01）;术后7d、14天时辛伐他汀组与单纯损伤组相比外周血cD34＋细胞无明显差别（P〉0．05）。术后21d、28天时辛伐他汀组与单纯损伤组相比外周血CD34＋细胞有显著差异（P〈0．05）。②与单纯损伤组相比辛伐他汀组、rhG—CSF组及联合组Si／Sm比值明显减小（P〈0．05）;辛伐他汀组和rhG—CSF组两组间比较无显著差别（P〉0．05）;联合组分别与辛伐他汀组、rhG-CSF组比较血管内膜增生更少,具有显著性（P〈0．01,P〈0．01）,结论：本实验研究发现辛伐他汀可促进损伤内膜修复及预防血管再狭窄,长期服用可以增加外周血CD34＋细胞;rhG—CSF可明显增加外周血CD34＋细胞及预防血管在狭窄;辛伐他汀与rhG—CSF联合用药可明显增加外周血CD34＋细胞、加速内皮修复与预防再狭窄,较单一用药具有更好的疗效。     

大鼠局灶脑缺血/再灌注后骨髓内皮祖细胞动员轨迹的追踪

目的观察大鼠局灶脑缺血/再灌注后骨髓内皮祖细胞(EPCs)能否动员至外周血进而归巢到缺血脑区。方法线栓法制备局灶脑缺血/再灌注模型。130只SD雄性大鼠完全随机分为模型+生理盐水组、模型+DIL-acLDL组。荧光共聚焦技术观察1d后骨髓腔内细胞摄取DIL-acLDL的情况;1d、2d、3d、7d观察骨髓、外周血CD34+DIL-acLDL+双阳性细胞及缺血大脑皮质区DIL-acLDL+阳性细胞情况;免疫组织化学法比较各组大鼠大脑缺血侧及未缺血侧皮质区CD34+血管表达;荧光定量PCR法比较各组大鼠大脑缺血侧及未缺血侧皮质区CD34mRNA表达。结果生理盐水组荧光共聚焦结果为阴性,DIL-acLDL组1d后骨髓腔内观察到红色标记的DIL-acLDL+阳性细胞,并分别于1d、2d、3d、7d后在骨髓及外周血中观察到CD34+DIL-acLDL+双阳性细胞,在缺血大脑皮质区未检测到DIL-acLD L+阳性细胞,但3d、7d缺血大脑皮质侧CD34+血管及CD34m RNA的表达明显高于未缺血侧(P0.01,P0.05),且表达量均随时间的推移而增多(P0.01)。结论DIL-acLDL可标记活体大鼠骨髓腔内细胞,且骨髓腔内EPCs可动员至外周血并促大脑缺血皮质区血管再生。     

非霍奇金淋巴瘤患者外周血中CD4+CD25+ 调节性T 细胞 亚群变化初探

目的:检测非霍奇金淋巴瘤(non-Hodgkin’s lymphoma,NHL)患者外周血中CD4+CD25+调节性T细胞(CD4+CD25+regulatoryT cell,Treg)的改变,探讨Treg与NHL的相关性。方法:病例组(n=60)为本院收治的初诊NHL患者,对照组(n=60)为本院健康体检者,用流式细胞技术联合标记CD4、CD25检测对照组及病例组化疗前、化疗后的外周血中CD4+CD25+调节性T细胞的分布特点。结果:(1)病例组化疗前外周血中CD4+细胞比例显著低于对照组(P<0.05),CD4+CD25+调节性T细胞比例显著高于对照组(P<0.05);(2)病例组化疗后,CD4+细胞比例明显高于化疗前(P<0.05),CD4+CD25+调节性T细胞比例明显低于化疗前(P<0.05);(3)病例组化疗后CD4+细胞比例与对照组无显著差异(P>0.05),而CD4+CD25+调节性T细胞比例显著高于对照组(P<0.05)。结论:非霍奇金淋巴瘤患者外周血中CD4+CD25+调节性T细胞比例升高,存在机体免疫抑制,化疗可降低CD4+CD25+调节性T细胞比例。     

脐带间充质干细胞联合UM171对脐血源CD34~+细胞的扩增效果研究

目的研究脐带间充质干细胞联合UM171对脐血来源CD34~+细胞的扩增效果。方法脐血来源CD34~+细胞及脐带来源间充质干细胞分为以下4组进行体外扩增培养10 d:对照组、UM171培养组、间充质干细胞共培养组、UM171联合间充质干细胞共培养组,采用方差分析比较不同组别间细胞扩增倍数及流式表型和集落培养情况。结果脐带间充质干细胞CD105,CD73,CD90,不表达CD14,CD34,CD19,CD45,HLA-DR,经过诱导可以向成骨细胞、脂肪细胞、软骨细胞分化。CD34~+细胞在不同条件下体外培养10 d后,UM171培养组总有核细胞数扩增14倍,CD34~+细胞扩增13.5倍;MSCs共培养组总有核细胞数扩增11倍,CD34~+细胞扩增10倍;联合培养组总有核细胞数扩增达22倍,CD34~+细胞扩增21倍。联合培养组扩增后细胞CD34~+CD38~-比例达(91.49±2.67)﹪,较间充质干细胞培养组(78.11±2.35)﹪及UM171培养组(91.49±2.68)﹪相比差异具有统计学意义(P均0.01)。扩增后细胞集落培养14 d后,各系集落形成良好,UM171扩增组细胞较MSCs扩增组在红系及粒系形成能力方面存在优势。结论脐带血间充质干细胞作为细胞滋养层可提高CD34~+细胞体外扩增效果,UM171在扩增过程中可较好的保持细胞干性,二者联合应用扩增效果最佳,建立的脐带间充质干细胞联合UM171对脐血源CD34~+细胞的扩增方法可用于CD34~+细胞体外扩增培养。     

rhG-CSF 动员对供者CD4+ T 细胞免疫表型和功能影响

目的:研究重组人粒细胞集落刺激因子(rhG-CSF)动员对供者CD4+T细胞表面分子淋巴细胞功能相关抗原-1(LFA-1)、细胞间黏附分子-1(ICAM-1)、L-选择素(LAM-1)和人整合素-4(VLA-4)的表达及其介导的CD4+T细胞功能的影响,探讨外周血干细胞移植过程中CD4+T细胞免疫耐受机制。方法:使用三色荧光标记检测动员前及动员后第5天供者外周血LFA-1、ICAM-1、LAM-1和VLA-4的表达率,ELISA方法检测动员前后CD4+T细胞分泌IFN-γ和IL-4能力,免疫磁性分选法分离纯化CD4+T细胞,检测动员前后CD4+T细胞对基质细胞衍生因子-1α(SDF-1α)的迁移能力和对ICAM-1的黏附能力。结果:动员前后CD4+T细胞LFA-1(CD11a)和VLA-4(CD49d)表达率差异无统计学意义(P>0.01),动员前后CD4+T细胞LAM-1(CD62L)和ICAM-1(CD54)的表达率差异均有统计学意义,动员前显著高于动员后(P<0.01);动员前后CD4+T淋巴细胞向SDF-1α的迁移率差异无统计学意义(P>0.01);动员后CD4+T细胞对ICAM-1的黏附率降低(P<0.01);动员后IL-4和IFN-γ两个细胞因子在外周血血清的浓度均降低(P<0.01)。结论:rhG-CSF动员不影响CD4+T细胞LFA-1和VLA-4表达及CD4+T细胞迁移,但影响CD4+T细胞ICAM-1和LAM-1表达以及CD4+T细胞通过LFA-1对ICAM-1的黏附能力影响,并可能影响CD4+T细胞分泌细胞因子IL-4及IFN-γ的功能。     

黄芪多糖对大鼠口腔溃疡治疗作用研究

本研究旨在探讨黄芪多糖对患有口腔溃疡大鼠(recurrent aphthous ulcer,RAU)的表皮细胞生长因子(epidermal growth factor,EGF)水平及T淋巴细胞亚群的影响。根据溃疡面的直径计算愈合率及HE染色观察溃疡组织病理学改变,酶联免疫吸附法(ELISA)测定EGF的水平,流式细胞仪检测大鼠外周血CD4+T细胞、CD8+T细胞亚群的百分率。实验结果显示治疗20 d后,黄芪多糖组大鼠溃疡面积减小,愈合率为87.5%～100%。与正常对照组相比,模型对照组大鼠CD4+T细胞数减少、CD8+T细胞数升高,CD4+/CD8+比值降低(P<0.05)。与模型对照组相比,黄芪多糖组大鼠外周血CD4+T细胞数升高、CD8+T细胞数降低,CD4+/CD8+比值回升(P<0.05)。EGF水平在造模后出现明显下降,黄芪多糖灌胃治疗后有升高。提示黄芪多糖能够提高RAU实验性大鼠EGF的水平和改善T细胞亚群的失衡状态,具有明显地促进口腔溃疡愈合的作用。     

四君子汤加减对乳腺癌术后化疗患者肠道菌群及细胞免疫功能的影响CSCD

目的 分析四君子汤加减对乳腺癌术后化疗效果以及患者肠道菌群、细胞免疫功能的影响。方法选取2021年1月至2023年1月我院收治的150例乳腺癌患者,均符合手术指征,且接受术后化疗。采用简单随机抽签分组的方法,规定抽取奇数的为单纯化疗组(n=70),偶数的为中药联合组(n=80)。单纯化疗组：术后2周开始化疗,选择CEF(环磷酰胺+表阿霉素+氟尿嘧啶)方案化疗：第1 d环磷酰胺600mg/m2+第1 d表阿霉素60 mg/m2+第1、8 d氟尿嘧啶500 mg/m2,静脉滴注,21 d为1个化疗周期间隔,共治疗6个周期。中药联合组：在上述化疗基础上服用四君子汤汤剂,1剂/d,疗程同单纯化疗组。评估两组患者中医证候疗效,检测化疗前后肠道菌群与免疫细胞的变化,观察毒副作用。结果中药联合组脾气虚证证候疗效优于单纯化疗组(Z=2.394,P=0.017)。化疗后,中药联合组的双歧杆菌和乳杆菌数量增加且多于单纯化疗组(P<0.001),肠杆菌和肠球菌数量减少且低于单纯化疗组(P<0.001),CD3+T细胞、CD4+T细胞、CD4+/CD8+T细胞水平高于单纯化疗组(P<0.001)。中药联合组的胃肠反应发生率低于单纯化疗组(χ2=5.133,P=0.023)。结论四君子汤加减对乳腺癌术后化疗效果有提升作用,可改善患者术后中医脾气虚证相关证候,调节肠道菌群及细胞免疫功能,毒副作用小。     

香菇多糖注射液对直肠癌根治术后患者纤维蛋白水平及免疫功能的影响

目的:研究香菇多糖注射液对直肠癌根治术后患者纤维蛋白水平及免疫功能的影响。方法:将2010年5月-2014年10月期间在我院接受直肠癌根治术的患者随机分为两组,观察组术后接受香菇多糖联合FOLFOX-4化疗,对照组术后接受FOLFOX-4化疗,观察两组患者化疗过程中的不良反应,测定化疗前后纤维蛋白水平及免疫功能指标。结果:观察组患者在化疗过程中消化道反应、肝功能损伤、骨髓抑制、周围神经毒性、口腔黏膜损伤、脱发的发生率均显著低于对照组(P0.05);化疗后,对照组患者外周血中CD3~+CD4~+CD8~-细胞、CD3~+CD4~-CD8~+细胞、CD19~+细胞、CD3~-CD56~+细胞的含量以及血清Ig M、Ig A、Ig G、FIB的含量显著低于化疗前(P0.05),观察组患者外周血中CD3~+CD4~+CD8~-细胞、CD3~+CD4~-CD8~+细胞、CD19~+细胞、CD3~-CD56~+细胞的含量以及血清Ig M、Ig A、Ig G的含量与化疗前无显著性差异(P0.05),血清FIB含量显著低于化疗前(P0.05);观察组患者化疗后外周血中CD3~+CD4~+CD8~-细胞、CD3~+CD4~-CD8~+细胞、CD19~+细胞、CD3~-CD56~+细胞的含量以及血清Ig M、Ig A、Ig G、FIB的含量显著高于对照组(P0.05),血清FIB含量显著低于对照组(P0.05)。结论:香菇多糖注射液辅助治疗能够减轻直肠癌根治术后FOLFOX-4化疗的毒副作用、改善免疫功能。     

急性病毒性肝炎患者外周血T 细胞亚群的检测和分析

目的:检测急性甲、乙型病毒性肝炎患者外周血T淋巴细胞亚群变化,探讨其对疗效和预后意义。方法:采用APAAP桥联酶标法检测115例急性甲、乙型病毒型肝炎患者外周血CD3+、CD4+、CD8+T细胞亚群比例,计算CD4+/CD8+值。并检测了34例患者治疗前后T淋巴细胞亚群变化。结果:115例急性甲、乙型病毒性肝炎患者外周血CD3+、CD4+T细胞比例及CD4+/CD8+值均低于正常对照组(P<0.05),而CD8+T细胞比例均高于正常对照组(P<0.01)。6例无明显疗效者,各亚群比例在治疗前后无显著差异(P>0.05)。28例有明显疗效者,治疗后各亚群比例恢复正常水平,与治疗前相比差别具有统计学意义(P<0.05)。结论:急性甲、乙型病毒性肝炎患者外周血CD4+/CD8+T细胞比值可在一定程度上反映疗效及预后。     

心理干预对非小细胞肺癌患者免疫功能及心理状态的临床研究

目的:研究心理干预对非小细胞肺癌患者免疫功能及心理状态的影响。方法:70例NSCLC患者随机分为治疗组(n=36)和阳性对照组(n=34),另设正常对照组(n=30),治疗组进行心理干预,阳性对照组和正常对照组不给予干预,30天后,计算患者的EORTC QLQ-C30积分并测定T细胞亚群CD3+、CD4+、CD8+、CD4+/CD8+指标。结果:治疗组患者干预后的生存质量(一般情况、躯体功能、社会功能等)及CD3+、CD4+、CD8+含量较干预前均有差异(P<0.01或P<0.05),治疗组患者干预后的生存质量及CD3+、CD4+、CD8+含量较阳性对照组干预后均有差异(P<0.01或P<0.05)。结论:心理干预对非小细胞肺癌患者的心理状态有积极作用,同时能提高患者的免疫力。     

六种藓类植物茎的比较解剖学研究

通过对6种藓类植物,即褶叶青藓(Brachythecium salebrosum(Web.et Mohr.)B.S.G.)、湿地匐灯藓(Plagiomnium acutum(Lindb.)Kop.)、侧枝匐灯藓(Plagiomnium maximoviczii(Lindb.)Kop.)、大凤尾藓(Fissidensnobilis Griff.)、大羽藓(Thuidium cymbifolium(Doz.et Molk.)B.S.G.)和大灰藓(Hypnum plumaeforme Wils.)嫩茎和老茎的石蜡切片和显微观察发现,同一藓类植株的嫩茎和老茎,茎结构稳定,不同种藓类植物茎横切面具有不同特征.植物体茎横切面形状、表层细胞的层数、细胞大小和细胞壁厚薄、皮层细胞大小和形状、中轴的有无以及比例等特征可以作为藓类植物的分科分类依据之一.     

Cause of Senescence of Nine Sorts of Flowers

The levels of endogenous phytohormones and respiratory rate in nine sorts of flowers such as Cymbidium faberi Rolfe, Nopalxochia ackermannii Kunth and others were investigated both at full bloom and senescence and meanwhile the effect of exogenous phytohormones on prolonging the blossoms and promoting ethylene production were tested. There is a high content of endogenous ethylene in all the long-lived flowere, about 3–16 folds higer than the short-lived ones. There is a high level of ABA at full blooming flowers of short-lived flowers, in which there is no or only some cytokinins in it, but the ratio of CTK (6BA+zeatin)/ABA is smaller(l.7). The endogenous ABA reached a much higher level at senescence in all nine sorts of flowers, so it is reasonable to consider that it is ABA which plays an important role of regulation in controlling flower's senescence. There is a much higher level of GA3 and zeatin in the long-lived flowers which is not demonstrated in the shortlived ones. The respiratory rate is one of the factors controtling the longevity of flowers, but it does not play a decided role. Application of 6BA and zeatin prolongs distinctly orchid’s longevity, however exogenous IAA through the promotive action on ethylene production, evidently extends the longevity of the flowers of the Nopalxochia ackermannii Kunth.     

Photoregulation of seed germination of wild-type and of an aurea-mutant of tomato

Seed germination of an aurea mutant of tomato ( Lycopersicon esculentum Mill.) is promoted by continuous irradiation with red, far-red or long-wavelength far-red (758 nm) light as well as by cyclic irradiations (5 min red or 5 min far-red/25 min darkness). Far-red light applied immediately after each red does not change the germination behaviour. Seed germination of the isogenic wild-type, cv. UC-105, is promoted by continuous and cyclic red light while it is inhibited by continuous and cyclic far-red light and by continious 758 nm irradiation. Far-red irradiation reverses almost completely the promoting effect of red light. The promoting effect (in the aurea mutant) and the inhibitory effect (in the wild-type) of continuous far-red light do not show photon fluence rate dependency above 20 nmol m⁻² s⁻¹. It is concluded that phytochrome controls tomato seed germination throgh low energy responses in both the wild type and the au mutant. The promoting effect of continuous and cyclic far-red light in the au mutant can be attributed to a greater sensitivity to P_fr.     

龙胆科药用植物化学成分的研究现状

龙胆科植物在我国的分布范围很广,且多数为药用植物,其多数种属的药用植物,至今其化学成分尚未被系统研究。综述了目前龙胆科药用植物的化学成分的研究现状及一般提取方法,对近年来发现的环烯醚萜及裂环烯醚萜类化合物进行了总结,为本科药用植物的更深入研究提供了参考。     

The effects of glutamine of the maintenance of embryogenic cultures of Cryptomeria japonica

Summary Embryogenic tissues of sugi (Cryptomeria japonica) were induced on a modified Campbell and Durzan (CD) medium containing 1 μM 2,4-dichlorophenoxyacetic acid (2,4-D) and 600 mg l⁻¹ glutamine, and subcultured in the medium of the same composition for over 1 yr. This resulted in a mixed culture of embryogenic and non-embryogenic cells. When embryogenic cells were isolated and cultured independently, their capacity to form embryogenic aggregates was lost. Thus, the non-embryogenic cells present within a mixed culture system were essential to the formation of embryogenic aggregates. When embryogenic tissues were isolated and cultured independently on a high glutamine-containing (2400 mg l⁻¹) medium, dry weights and endogenous levels of glutamine increased, and the tissue could generate a large number of embryogenic aggregates. Amino acid analysis of embryogenic and non-embryogenic cells from the maintenance culture indicated a higher level of glutamine was present in the latter. The high endogenous level of glutamine in the non-embryogenic portion of mixed cell masses may be the supplier of glutamine for maintaining the embryogenic property of the tissues.     

Specificity of action of piperidylcholine derivatives as substrates of cholinesterases of various origin

The review deals with study of enzymologic properties of a novel highly specific acetylcholinesterase substrate, N-(β-acetoxyethyl) piperidinium iodomethylate (“piperidylcholine”), and its 30 derivatives that were tested as effectors of cholinesterases of mammals and various species of Pacific squids. It was proven for the first time that responsible for specificity of action was structure of cyclic ammonium grouping of the alcohol part of molecule of the ester substrate. Analysis of specificity is performed based on enzymatic hydrolysis parameters—activity of catalytic center of cholinesterases and bimolecular constant of the reaction rate that are determined at optimal and low substrate concentrations. Among the specially synthesized group of thioester compounds there is revealed one more highly specific acetylcholinesterase substrate—N-(β-acetoxyethyl) piperidinium.     

Interconnection of parameters of regulation system of lipid peroxidation and of morphophysiological parameters of mouse liver

A complex analysis of seasonal fluctuations of the mean group parameters of the system of regulation of lipid peroxidation has been performed in liver of Balb/c mice. Association of lipid characteristics and morphophysiological parameters is studied in the Balb/c mouse liver. An inter-connection is revealed between the liver index and the amount of lysoforms of phospholipids, the scale and character of the interconnection differing essentially depending on proportion of phos-phatidylcholine in mouse liver phospholipids.     

真菌类遗传学分析的知识结构教学

本文以认知结构理论为指导,讨论了真菌类遗传分析与高等动植物遗传分析的内在联系,认为利用这种内在联系进行教学可收到好的效果并说明了作者的具体教学过程。 Abstract:In the paper, the relationship between genetic analysis of Fungi and genetic analysis of high animal and plant was discussed.A good results were obtained when we adopted this method in the teaching.