锌、硒、锗对小鼠免疫功能的影响

用灌胃法观察了微量元素锌、硒、锗对小鼠免疫功能的影响。结果 :锌 (8mg/ kg)、硒 (0 .1mg/kg)、锗 (10 0 mg/ kg)均可显著提高小鼠巨噬细胞吞噬百分率及吞噬指数 ,且加锌组较加锗组的作用更为明显 (P <0 .0 1) ;亦可显著提高小鼠 E-花结形成、淋巴细胞增殖反应和 IL - 6活性 (P <0 .0 1)。各实验组之间无明显差异。提示 :适量的锌、硒、锗可提高机体巨噬细胞吞噬功能 ,增强细胞免疫功能和IL - 6活性。     

EFFECTS OF QUERCETIN ON MEMBRANE FLUIDITY OF INJURED VASCULAR ENDOTHELIAL CELLS WITH HYPOXIA AND THE LACK OF GLUCOSE

Vascularendothelialcellsinhypoxiaandthelackofglucosecanproducealotofactiveoxygen ,whichresultsinthedamageofendothelialcells .Furthermore,dysfunctionofvascularendothelialcellsistheinitiativestepofatherosclerosisandmayleadtosomeofcardiovasculardiseases[1 ,2 ] .So ,theprotectionofendothelialcellsfromtheinjuryplaysanimportantroleinthepreventionandtreatmentofatherosclerosis,hypertension ,hyperc holesterolaemiaandsoon .Therefore,manyre searchershavebeenlookingforamedicinethatcanhelptomaintainthenorm…     

生血丸对小鼠造血干细胞的影响

本文用外源性脾结节法,体内扩散盒半固体培养法以及体内血浆凝块法,观察了中药生血丸对小鼠多能干细胞,粒系祖细胞及红系祖细胞的影响。实验结果表明,生血丸对小鼠多能干细胞,粒系及红系祖细胞有刺激其增殖的作用。故推测中药生血丸治疗贫血的机理,可能与该药对造血干细胞的影响有关。     

In Vitro Model of Human Choroidal Neovascular

Choroidal capillary endothelia cell (CEC) plays a critical role in the development of choroidal neovascularization which is one of the major causes of blindness. An effective method for CEC cultivation was proposed. The isolation of human choroidal CECs using micro dissection followed by the use of superparamagnetic beads (Dynabeads) coated with the CD 31, which selectively binds to the endothelial cell surface. Cells bound to beads were isolated using a magnetic particle concentrator. The CECs were planted into type IV collagen coated 24 well plates. The results show that the primary cultured CEC is induced to tube formation in collagen IV coated environment, which can be presented as an in vitro model of choroidal neovascularization.     

hGDF5基因转染对骨髓间充质干细胞增殖和分化的影响

目的探讨人生长分化因子5(hGDF5)基因转染对骨髓间充质干细胞(BMSCs)增殖及分化的影响。方法采用脂质体介导方法将hGDF5基因转入体外培养的兔BMSCs,用逆转录多聚酶链反应(RT-PCR)、间接免疫荧光检测hGDF5 mRNA和蛋白质的表达,并通过检测碱性磷酸酶活性、细胞增殖能力(MTT法)、Ⅱ型胶原(ColⅡ)以及蛋白多糖(PG)的表达,分析转染hGDF5对BMSCs增殖、分化的影响。结果hGDF5 mRNA及蛋白在基因转染细胞内得到正确表达;hGDF5基因转染组和对照组相比,ColⅡ、PG表达水平显著增高(P<0.01,P<0.01),而碱性磷酸酶活性和细胞增殖能力无明显变化(P>0.05)。结论外源基因转染可以使BMSCs表达有生物活性的hGDF5。高表达的hGDF5可以促进BMSCs向软骨表型分化,但对细胞增殖和碱性磷酸酶活性无明显影响。     

高压变频矢量控制系统的仿真

以单元串联型高压变频器作为研究对象,根据载波移相SPWM和矢量控制的原理,建立了高压变频矢量控制系统仿真模型,并对其进行了仿真分析,结果证明了该系统具有良好的动态特性.     

B－CELL APOPTOSIS INDUCED BY ANTIGEN RECEPTOR CROSSLINKING IS BLOCKED BY A T－CELL SIGNAL THROUGH CD40

Ｂ－ＣＥＬＬＡＰＯＰＴＯＳＩＳＩＮＤＵＣＥＤＢＹＡＮＴＩＧＥＮＲＥＣＥＰＴＯＲ　ＣＲＯＳＳＬＩＮＫＩＮＧＩＳＢＬＯＣＫＥＤＢＹＡＴ－ＣＥＬＬＳＩＧＮＡＬＴＨＲＯＵＧＨＣＤ４０ＴａｋｅｓｈｉＴｓｕｂａｔａ，ＷｕＪｉｎｇ；ＴａｓｕｋｕＨｏｎｊｏ（Ｄｅｐａ...     

The experimental observation on the repairing spinal cord injury by olfactory ensheathing cells allograft of different sources

Objecttive To observe the repaired effect of distinct source olfactory ensheathing cells （OECs） on spinal cord injury （SCI） rats. Methods These OECs were dissociated from olfactory bulb and olfactory mucosa of SD rats and transplanted to the injuried region of spinal cord injury rats. The function of nerve, motor evoked potential of hind legs and the histopathlogical diversities of injuried spinal cord were observed. Results The OECs grafts into the SCI area could survive longer time. The BBB scale, incubation stage of EP and histopathologic manifestations showed that the group with transplanted OECs regained more improvement in hindlimb than the control group. Conclusion The OECs of two sources have the same ability to regain and improve the axonal function which can promote axons regeneration of SCI.     

骨骼肌中存在CDla^＋细胞

目的 研究骨骼肌中CDla^ 细胞的形态、分布及功能。方法 4例人骨骼肌样本采用CDla抗体进行免疫组织化学染色．光镜观察。结果 骨骼肌纤维之间、肌束膜和肌外膜的血管壁、神经纤维、脂肪组织中的CDla^ 细胞呈带状、灶状或散在分布。CDla^ 细胞大小不等，形态多样，常有突起。突起粗细、长短、多少不等，其突起可与周围或远处的CDla^ 细胞或突起相连；骨骼肌纤维之间的CDla^ 细胞也可与肌膜紧密相连。结论 骨骼肌纤维之间的CDla^ 细胞可能是肌卫星细胞的某一分化阶段；骨骼肌中各种组织内的CDla^ 细胞也可能是相应组织成熟细胞的前体状态，并参与相应组织结构的形成和维持。     

硒与锌对培养人胚心肌细胞~3H-TdR参入DNA的影响

本文应用不同浓度的硒(0.50、0.75、1.00μg/ml)和锌(0.10、0.50、1.00μg/ml)分别加入心肌细胞培养液中,观察两者对~3H-TdR 对 DNA 参入率的影响.实验结果显示,加入 Se 0.50μg/ml 及 Zn 0.50～1.00μg/ml,能增加~3H-TdR 的参入率。