Abstract:Objective To study the immunologic function of MAN2C1 gene in the transgenic mice.Methods Infection of transgenic mice with H5N1 were performed by nasal dripping.The pathological changes of lung tissues were observed by HE staining and immuno-histochemistry.H5N1 viral load in lung of mice were detected with RT-PCR.Serum antibody against H5N1 was measured with indirect ELISA.Results The pathological changes were more serious in the transgenic lung than that of control mice.The expression levels of H5N1 virus antigen and virus load in the lung tissues of transgenic mice were obviously higher than that in control mice. A decreased level of serum antibody against H5N1 was also observed in the transgenic mice compared with control mice.Conclusion Our results suggest that MAN2C1 gene down-regulates the humoral immunity against virus infection.

Abstract:目的探索有效的纯化大雁卵黄抗体及高效价二抗的方法。方法应用了PEG沉淀,阴离子交换柱,硫酸铵分级沉淀纯化,免疫制备二抗,免疫电泳和免疫双扩散法及western blotting进行效价的测定。结果改良后的硫酸铵沉淀法的纯度远远高于PEG沉淀,相对于离子交换法而言更加简单方便,经济省时。从免疫电泳看已达到了电泳纯,大雁卵黄IgY的相对分子质量为180×103,重链约为66×103,轻链约为24×103。免疫获得的二抗有较强的免疫活性。结论用改良的硫酸铵沉淀法纯化大雁卵黄抗体,效率和纯度显著提高,值得推广。本实验为大雁卵黄抗体及其二抗的应用奠定了基础,也为雁形目其他种类卵黄抗体的纯化提供了参考。

Abstract:Objective To prepare Cholecystokinin(CCK) transgenic mice and investigate the effect of CCK on food intake and metabolism in mice.Methods Transgenic mice were created by the method of microinjection.The genotype of transgenic lines was identified by PCR.The brain specific expression of the CCK gene was analyzed by Western Blotting.The plasma cholesterol and plasma triglyceride were detected and analyzed with a detection kit.Results Three founders of PDGF-CCK transgenic mice were established.Two of PDGF-CCK transgenic independent lines exhibited high-level brain-specific transgene expression compared with that of no-transgenic littermate controls by Western Blotting.The Body weight of the transgenic mice was lower than that of no-transgenic littermate controls,while the plasma cholesterol and plasma triglyceride were not detected obviously different from the controls.Conclusion High expression of CCK in the mouse brain can decrease the action of food intake and decrease body weight of the transgenic mice.

Abstract:目的应用小动物高频超声技术对糜酶转基因小鼠的心功能进行分析,以探索糜酶基因对心脏结构和功能的影响。方法通过VisualSonics Vevo770高分辨率小动物超声系统检测不同年龄的转基因小鼠及对照小鼠包括心壁厚度、主动脉血流速度、左心室内径、左心室容积、每搏输出量、射血分数、短轴缩短率和心输出量等的心脏功能指标的改变进行比较分析。结果随着小鼠年龄的增大,转基因阳性小鼠心壁厚度和主动脉血流速度逐渐增加,至6月龄时,转基因小鼠的左心室前壁收缩期厚度增加37%,增长率是对照小鼠的1.2倍(P<0.05);主动脉血流速度比对照小鼠高29%(P<0.05);转基因阳性小鼠的左心室内径、左心室容积、每搏输出量、射血分数、短轴缩短率和心输出量等的心脏功能指标表现出和以上变化相一致的表型。结论转基因小鼠糜酶表达水平升高,引起心脏AngⅡ形成增多,可使心肌细胞的收缩力提高;心肌细胞肥大,心壁增厚;且有随年龄增加的趋势,可研究建立慢性、老年性肥厚型心脏病模型。

Abstract:Objective To establish a method for purification of IgG from tiger serum with high purity. Methods The tiger serum was subject to precipitation with ammonium sulfate and then purified by Protein-A Affinity Chromatography and anion exchange chromatography,The purity of IgG was identified by SDS-PAGE and Western-Blot methods.Results Eighty-four mg IgG was purified from 80 mL tiger serum using Protein-A Affinity Chromatography and Thirty mg IgG was further purified from the 84mg affinity purification IgG using anion exchange chromatography.Conclusion The method was established for purification of tiger IgG,and provide IgG antigens for the production of polyclonal rabbit anti-tiger-IgG secondary antibody.

Abstract:目的纯化长爪沙鼠血清IgG,制备兔抗长爪沙鼠IgG抗血清。方法采用Hitrap Protein G亲和层析预装柱来纯化长爪沙鼠血清IgG;通过SDS-PAGE电泳和Western-Blotting免疫印迹法对长爪沙鼠血清IgG进行纯度鉴定,免疫兔子制备抗血清。结果7 mL长爪沙鼠血清纯化得到11 mg IgG;电泳和免疫印迹测定,IgG纯度大于95%;用纯化的IgG作抗原制备了兔抗血清,免疫双扩散测定效价达1∶32。结论建立了长爪沙鼠血清IgG的纯化方法,制备了长爪沙鼠IgG抗血清,证实长爪沙鼠血清IgG和Protein G具有较高的亲和性。

Abstract:目的分离纯化黄鳝血清免疫球蛋白,制备其兔抗血清,并检测抗血清的特异性。方法用Protein A亲和层析的方法纯化黄鳝血清免疫球蛋白,通过SDS-聚丙烯酰胺凝胶电泳检测蛋白的纯度,免疫大耳白兔制备抗血清,利用免疫双扩散检测抗血清的效价,通过western blotting检测抗血清的特异性。结果纯化了黄鳝血清免疫球蛋白,免疫双扩散法测定兔抗黄鳝免疫球蛋白血清效价为1∶32,western blotting结果显示抗血清具有很好的特异性。结论成功纯化了黄鳝免疫球蛋白,制备了兔抗黄鳝IgM抗血清,为建立黄鳝的血清学检测系统奠定了基础。

Abstract:目的分离纯化乌鳢血清免疫球蛋白,并制备其兔抗血清。方法用Protein A亲和层析的方法纯化乌鳢血清免疫球蛋白,通过SDS-聚丙烯酰胺凝胶电泳检测蛋白的纯度,测定其重链、轻链的分子量,免疫大耳白兔制备抗血清,利用免疫双扩散检测抗血清的效价。结果纯化了乌鳢血清免疫球蛋白,SDS-PAGE测定其重链和轻链的相对分子质量分别为78×103和27×103左右,免疫双扩散法测定兔抗乌鳢免疫球蛋白抗血清效价为1∶32。结论成功纯化了乌鳢免疫球蛋白,制备了兔抗乌鳢IgM抗血清,为研究乌鳢的免疫机制、建立乌鳢的血清学检测系统奠定了基础。

Abstract:Objective To purify the IgYs from the egg yolk of peacock and quail and ladyhood-chicken.Rabbits were immunized with the purified IgYs.Methods We employed the methods of water dilution affinity chromatograph and salt precipitation.The antiserum were characterized by double immunodiffusion(DID).Results The purified products were identified by SDS-PAGE.The molecular weight of egg yolk antibodies of peacock and quail and ladyhood-chicken was 180 KD.The titer of the antiserum is high.Conclusion The purification methods for IgYs from peacock,quail and ladyhood-chicken were established.

Abstract:目的纯化黑线毛足鼠和金仓鼠血清IgG,制备兔抗金仓鼠和黑线毛足鼠血清IgG的抗血清。方法用Hitrap Protein G亲和层析纯化黑线毛足鼠和金仓鼠血清IgG,经SDS-PAGE电泳鉴定纯度,标准免疫方法免疫兔子制备抗血清。结果黑线毛足鼠和金仓鼠血清IgG对protein G有很高的亲合性,用Hitrap Protein G亲和层析纯化,得到高纯度黑线毛足鼠和金仓鼠IgG,利用纯化的IgG作抗原制备了高效价的抗血清,免疫双扩散测定效价达1∶32和1∶16。结论证实黑线毛足鼠和金仓鼠IgG和Protein G具有很高的亲和性,Protein G亲和层析是纯化黑线毛足鼠和金仓鼠IgG有效的方法之一,制备了黑线毛足鼠和金仓鼠IgG的抗血清。

Abstract:目的纯化鹭科具有代表性的夜鹭及鸬鹚科具有代表性的鸬鹚的卵黄抗体IgY。方法采用了水稀释法和硫酸铵分级沉淀法粗提IgY,再过HiTrap IgY Purification HP柱子进一步纯化。结果经两步纯化,得到了纯化的鸬鹚和夜鹭的卵黄抗体IgY,经SDS-PAGE检测为电泳纯,夜鹭和鸬鹚的卵黄抗体的相对分子质量约为180×103。结论证实了鸬鹚和夜鹭的卵黄抗体IgY的存在及其特性,为这两种鸟类的卵黄抗体IgY纯化,二级抗体制备提供了参考。

Abstract:目的制备高纯度貉血清IgG和兔抗貉IgG抗血清,作为建立多种动物抗体检测技术的储备。方法采用Hitrap Protein A亲和层析及盐析再沉淀法纯化貉血清IgG,通过PAGE电泳和Western-Blot免疫印迹法对IgG作纯度及免疫活性检测;常规免疫法制备兔抗貉IgG血清。结果貉血清IgG与Protein G虽有较强的结合力,但同时也结合血清中其他杂蛋白;用二步纯化法可从5 mL貉血清中纯化IgG约7 mg,电泳和免疫印迹测定显示,IgG纯度大于95%,常规免疫法制备抗血清免疫双扩散效价达1∶32。结论建立了可行的貉血清IgG的纯化方法和高效价的兔抗貉血清IgG抗血清,为貉血清IgG二级抗体酶联物的制备储备了资源。

Abstract:目的利用不同剂量的冷冻保护剂,对ICR和Km小鼠不同发育期的胚胎进行冷冻和解冻实验。探讨Nakagata小鼠胚胎玻璃化冷冻管方法,使用不同剂量的冷冻保护剂等因素对冷冻效果的影响。方法2细胞期胚胎在KSOM微滴培养液内分别培养到2细胞4、细胞和8细胞期胚胎,分别加入50μL,100μL,200μL的DAP213冷冻保护剂,利用Nakagata方法冷冻,解冻以及观测解冻后培养至囊胚期胚胎的冷冻效果。结果冷冻保护剂DAP213剂量和ICR,KM小鼠胚胎不同细胞发育期对冷冻效果具有显著的交互影响(P<0.01)。相对而言,冷冻保护剂剂量对结果的影响(P>0.05)低于胚胎细胞发育期对冷冻效果的影响(P<0.01)。结论冷冻保护剂的剂量和胚胎细胞发育期均会影响冷冻实验的结果。胚胎的细胞发育期对冷冻效果的影响更大。对2细胞期,4细胞期和8细胞期的胚胎进行冷冻。8细胞期胚胎的冷冻效果最好,4细胞期胚胎冷冻效果最差。利用Nakagata冷冻管方法建立小鼠胚胎冷冻库,100μL冷冻保护剂效果较好。不同小鼠的品系也可影响冷冻结果。

Abstract:目的为了在大肠杆菌中融合表达人β防御素-3基因。方法根据大肠杆菌对精氨酸密码子使用的偏爱性,设计搭桥引物,并通过PCR扩增法合成了人β防御素的全基因序列,克隆进pGEX-4T-2中构建pGEX-4T-2-hBD-3融合表达载体。将表达载体转化E.coli宿主菌DH5α,进行IPTG诱导表达。将菌体反复冻溶使细胞膜穿孔,释放可溶性蛋白。融合蛋白GST-hBD-3经凝血酶切割。结果研究得到了重组人防御素蛋白,琼脂孔穴扩散抑菌法检测表明,重组人β防御素3对金黄色葡萄球菌有抗菌活性,抑菌效价为0.843 U。结论人β防御素-3基因在大肠杆菌中得到了融合表达。

Abstract:目的通过对4周龄昆明白小鼠腹腔内单次注射白消安来制作精原干细胞移植受体鼠模型。方法将实验动物分为4组,A、B、C组注射白消安的剂量分别是30 mg/kg4、0 mg/kg5、0 mg/kg体重,D组为对照组。注射后每天记录小鼠的存活情况,注射白消安后的20 d3、0 d4、0 d称量睾丸重量、测定血常规、制作并观察睾丸组织学切片、统计曲细精管的中空率。结果A、B、C、D组的死亡率分别是25.00%3、1.58%、80.00%、0.00%,注射白消安后30 d各组小鼠曲细精管中空率分别是45.25%、75.25%、1.50%、0.00%,白细胞、红细胞、血小板数量等血常规指标均恢复正常。结论腹腔内单次注射30 mg/kg或40 mg/kg剂量的白消安,死亡率较低(25.00%、31.58%),30 d后曲细精管中空率较高(45.25%7、5.25%)、血常规指标恢复正常,适合做精原干细胞移植受体。

Abstract:Objective To evaluate the procedures to purify IgG with simple and rapid,high purity and high biological activity from Paguma larvate serum. Methods The Paguma larvate serum IgG was purified by Hitrap Protein A affinity chromatography and 8% non-reduced SDS-PAGE. The purity was identified by 12% SDS-PAGE, and compared the method on purification of IgG from Paguma larvate serum. The purification efficiency of the two methods was compared by amino black staining and protein A-HRP blotting. Results The IgG purified from Protein A affinity chromatography showed a high protein A- HRP binding activity, but purity is lower than non-reduced SDS-PAGE and the IgG from non-reduced SDS-PAGE also showed same levels of protein A-HRP binding activity. Conclusion For Paguma larvate serum IgG, purification by 8% non-reduced SDS-PAGE is an ideal method.

Abstract:The reptiles can generate prompt and powerful antibody response to either soluble or particulate antigens.High molecular weight immunoglobulin and more than one low molecular weight immunoglobulins have been found in the serum of the reptiles.Transmission of specific immunoglobulins(IgY) from mothers to their offspring via the egg has been proven recently.Salt out of saturated(NH_4)_2SO_4,exclusion chromatography,ion exchange chromatography and protein A affinity chromatography were usually used in the purification for immunoglobulins of reptiles.The research for Humoral immunity in reptiles has significance to the evolution of animal immunology and the control for pathogeny.

Abstract:卵黄抗体性能稳定,具有较强抵抗热酸、碱的能力,室温下可保持6个月的活性,4℃下放置几年活性不减,易于大规模生产等许多优点,卵黄免疫球蛋白的纯化方法和哺乳动物的纯化方法不同,包括有机物沉淀法,有机溶剂抽提法,天然胶法和水稀释法等粗提方法;凝胶过滤层析,离子交换层析和亲和层析等精细纯化方法。本文就卵黄抗体的分离和纯化方法的优缺点作一比较。

Abstract:Along with the rise of the research of neurpeptide in neurobiology field,Peptidic neurotransm itters-somatostain becomes the hot spot of researching the pathogenesis of depression.In this article we comprehensively summarize the documents of the structure and distribution of somatostain,the type and distribution of somatostain receptor,the effect of somatostain,the change of somatostain content and,the pathogenesis in depression and the adjusting function of TCM on the animal model's somatostain.

Abstract:Animal model is an indispensable way for diseases research,pathology mechanism investigate,clinic medicine therapy experiments.At present,HIV,HBV still damage human healthy seriously because there are no proper animal models infected by such human viruses to research procedure of diseases which are causes by HIV and HBV.If human stem cells,which grow and differentiate outside of human bodies,were engrafted into laboratory animals' bodies to form chimerism successfully,human would culture animal models AIDS and other serious diseases to do more deep research and make out appreciate therapy protocols. Now sheep,mice are chief laboratory animals for human stem cells engraftment,we will introduce the developmental status on human stem cells engraftment.

Abstract:Green fluorescent protein is a new report molecule found in Aequorea victaria.The protein and its ramifications can be expressed in many organisms and emits fluorescence.It has been widely studied and used in biology.It provides effective methods to deeply unravel the mechanism of physiological and pathological processes of tumor detect and monitor cancer and their treatments in real-time,dynamic,subtle,non-invasive,targeting way.