抗T-2毒素单克隆抗体的制备及特性

目的 :建立敏感、特异和快速的针对T 2毒素的ELISA检测方法 ,形成具有我国自主知识产权的快速检测试剂盒。方法 :利用B细胞杂交瘤技术 ,建立抗T 2毒素的单克隆杂交瘤细胞株。结果 :用T 2 羊免疫球蛋白 (T 2 GIgG)偶联物免疫 8～ 10周龄雌性BALB/c小鼠后 ,取脾细胞与小鼠骨髓瘤细胞系Sp2 /0融合 ,经过 3～ 4次亚克隆建立了 2个稳定分泌抗T 2毒素抗体的杂交瘤细胞株 ,分别命名为 2A7和 6E4。将上述 2株杂交瘤细胞分别注入BALB/c小鼠腹腔 ,获得含抗T 2毒素单克隆抗体的腹水 ,并将腹水用饱和硫酸铵法进行纯化 ,得到 2A7和 6E4单克隆抗体。两株单克隆抗体的Ig亚类为IgG1,腹水中抗体的滴度分别为 6 .4× 10 6和 1.1× 10 7,参考工作浓度分别为1.0× 10 6和 3.2× 10 6。纯化后 2A7抗体的IgG含量为 16 .4g/L ,亲和常数为 8× 10 -8mol/L。 2A7抗体与其他结构类似物无交叉反应 ,具有较高的特异性。结论 :制备了具有高特异性和亲和力的抗T 2毒素单克隆抗体 ,初步建立了针对T 2毒素的ELISA检测方法。     

破伤风毒素单克隆抗体的制备及鉴定

目的 一株抗破伤风毒素鼠源单克隆抗体的制备与鉴定.方法 从实验室前期以破伤风类毒素为抗原筛选得到的6株稳定细胞株中选取4E12进行制备及鉴定,首先将4E12细胞株扩大培养后腹腔注射BALB/c小鼠制备腹水,经Protein G柱和PD10脱盐柱两步纯化鼠源单抗;其次通过SDS-PAGE电泳检测抗体纯度并通过分型试剂盒鉴定抗体轻重链亚型,免疫印迹法鉴定抗体结合区域及表位类型,非竞争ELISA法测定抗体亲和力常数以及小鼠中和实验评价抗体中和活性.结果 获得能稳定分泌抗体的杂交瘤细胞株4E12,其细胞培养上清效价为4×103,抗体轻重链分别为κ型和IgG1型,CDR3序列分别为SQSTHVPPT和ARKGTGTGFNY;4E12腹水抗体效价为3.2×104,抗体经纯化后纯度＞95％,以线性表位与TeNT/Hc结构域特异性结合,两者的亲和力常数为3.6×10-10 mol/L,小鼠中和实验结果显示,4E12抗体可部分中和破伤风毒素.结论 筛选到一株高亲和力的鼠源单抗,为破伤风毒素检测及中和抗体研发奠定了基础.     

抗PSMA7单克隆抗体的制备和初步鉴定

目的制备抗蛋白酶体α7亚基(PSMA7)的单克隆抗体,为PSMA7的功能研究奠定基础。方法以纯化的重组蛋白PSMA7为抗原免疫BALB/c小鼠,运用杂交瘤技术制备PSMA7单克隆抗体,并用间接ELISA法和Western blot法对单克隆抗体的特性进行鉴定。结果成功建立两株稳定分泌抗PSMA7蛋白的单克隆抗体杂交瘤细胞株,分别命名为B013和B001。检测杂交瘤细胞培养上清抗体效价为1∶128和1∶256,腹水效价为1∶25600和1∶32000。两株单克隆抗体的免疫球蛋白亚类均为IgG1。Westernblot及免疫组化实验证实,两株单克隆抗体均能特异性结合真核细胞内源性PSMA7蛋白。结论成功建立了两株效价高、特异性好的抗PSMA7单克隆抗体杂交瘤细胞,制备的单克隆抗体可用于PSMA7蛋白的鉴定,为其生物学功能研究奠定了基础。     

抗鸡蛋黄IgY单克隆抗体的制备和初步鉴定

以纯化的鸡蛋黄IgG(IgY)为免疫原,免疫BACB/c小鼠.取其脾细胞与小鼠Sp/o骨髓瘤细胞融合,经间接EIISA筛选,3次克隆化后,获得2株能稳定分泌抗IgY单克隆抗体的杂交瘤细胞IGII和3A6.用琼脂双扩散法鉴定,两者均为IgG_1亚类.特异性鉴定表明,IGII和3A6两株单克隆抗体均与鸡血清IgG及鸡蛋黄IgG起强反应,而不与鸭蛋黄、鹌鹑蛋黄、小鼠血清、大鼠血清、兔血清、羊血清、马血清,以及人血清的IgG起反应.IGII与3A6的腹水效价分别为3.1×10~(-6)和6.4×10~(-6).     

重组CPTα的亲和纯化及其单克隆抗体的制备

目的 :制备抗A型产气荚膜梭菌毒素α(CPTα)单克隆抗体 (mAb)并鉴定其生物学特性。方法 :利用工程菌株E .coliM15 /pQE30 CPTα表达的重组A型CPTα带有 6个组氨酸 (6×his)标签的特性 ,经Ni NTA螯合亲和层析方法纯化后 ,用纯化的重组CPTα免疫BALB/c鼠 ,以常规杂交瘤细胞融合技术、HAT选择性培养和间接ELISA进行筛选 ,并分析其亚类及中和保护作用。结果 :获得一株能稳定分泌抗CPTα的mAb杂交瘤细胞株 4E2 ,其分泌抗体亚类为IgG1。该mAb与重组CPTα和天然CPTα均可发生特异性反应 ,并可保护小鼠抵抗 2倍最小致死剂量CPTα的攻击 ,属中和性抗体。结论 :应用纯化的重组CPTα成功地获得了特异性的中和抗体mAb 4E2 ,为A型CPTα诊断抗体和治疗性抗体的研制奠定了基础。     

赭曲霉毒素A单克隆抗体的制备及直接竞争酶联免疫吸附法的建立

目的 建立快速且灵敏的赭曲霉毒素A(OTA)直接竞争酶联免疫吸附检测(cdELISA)方法.方法 采用OTA与卵清蛋白(OVA)偶联作为抗原免疫BALB/c小鼠,取小鼠脾细胞与小鼠骨髓瘤细胞SP2/0进行细胞融合、克隆筛选,获得鼠抗OTA的杂交瘤细胞株;以ELISA方法测定抗体效价并鉴定抗体的IgG及亚类;用辣根过氧化物酶(HRP)标记OTA,建立cdELISA方法.结果 获得了3株稳定分泌高效价抗OTA单克隆抗体的杂交瘤细胞株(S-17-8、S-212-7和S-225-11),3株重链均为IgG1亚型,轻链为κ亚型;建立了cdELISA检测方法,检测下限为0.5ng/ml.结论 以抗OTA单克隆抗体和OTA-HRP为基础,建立了灵敏且省时的检测OTA的cdELISA方法,为进一步OTA快速筛查提供了条件.     

抗—HIV单克隆抗体的的筛选与鉴定

我们用HIV抗体阳性者血浆包被聚苯乙烯条，加入纯化的HIV组织培养抗原，通过夹心ELISA法，筛选出3株能分泌抗HIV单克隆抗体杂交瘤细胞，传代稳定。培养上清经Westernblot染色鉴定含有抗-HIVgag蛋白，夹心ELISA法测得杂交瘤细胞培养上清中单克隆抗体滴达到1：6400，接种BALB/C小鼠获腹水抗体效价为1：2430000。实验表明，用此单克隆抗体检测HIV病人血清抗体敏感、特异、稳定、重复性好，是一种良好的试剂。     

抗-HIV单克隆抗体的筛选与鉴定

我们用HIV抗体阳性者血浆包被聚苯乙烯条,加入纯化的HIV组织培养抗原,通过夹心ELISA法,筛选出3株能分泌抗HIV单克隆抗体杂交瘤细胞,传代稳定。培养上清经Western blot染色鉴定含有抗-HIV gag蛋白。夹心ELISA法测得杂交瘤细胞培养上清中单克隆抗体滴度达到1∶6400,接种BALB/C小鼠获腹水抗体效价为1∶2430000。实验表明,用此单克隆抗体检测HIV病人血清抗体敏感、特异、稳定、重复性好,是一种良好的试剂。     

盐酸克仑特罗单克隆抗体的制备及特性鉴定

目的:制备抗盐酸克仑特罗(clenbuterol ,CL)的单克隆抗体并进行免疫学特性鉴定.方法:用重氮化法将盐酸克仑特罗偶联于载体牛血清白蛋白(BSA),形成的结合抗原BSA-CL作为免疫原免疫BALB/c小鼠,同时将CL与卵清白蛋白(OVA)偶联制备检测原(OVA-CL).应用杂交瘤技术建立分泌抗盐酸克仑特罗单克隆抗体的杂交瘤细胞株,体内诱生腹水并进行纯化.用竞争性ELISA法测定抗体的亲和常数及交叉反应性.结果及结论:获得了18株稳定分泌抗盐酸克仑特罗单克隆抗体的杂交瘤细胞株,挑选其中E9-C11、C11-E3、E7-G8三株高亲和力的细胞株进行免疫学特性鉴定.三株抗体的亚类均为IgG1.细胞上清的间接ELISA效价分别为1:1 280、1:1 000、1:800,三株腹水效价都约为1×10-6.亲和常数分别为2.4×10-8mol/L、2.83×10 -8 mol/L 、3.28×10-8 mol/L .E9-C11单抗对CL的IC50为6.1035μg/L;对沙丁胺醇的IC50大于781.25 μg/L,交叉反应性小于0.78%;对肾上腺素、去甲肾上腺素、异丙肾上腺素、莱克多巴胺及部分维生素和抗生素均无交叉反应性.蛋白免疫印迹分析证明三株单抗特异性均很高,可用于与其相关的免疫检测或应用研究.     

产毒大肠杆菌不耐热肠毒素单克隆抗体杂交瘤细胞系的建立及初步应用

用亲和层析纯化的产毒大肠杆菌(ETEC)不耐热肠毒素(LT)免疫BALB/C小鼠,将小鼠脾细胞与SP_(2/0)骨髓瘤细胞(1:8)在PEG(MW1000)作用下融合,采用ELISA筛选抗-LT抗体阳性孔,细胞融合率为50％,抗体阳性率为4.5％,经3～5次克隆后筛选出2株分泌抗-LT杂交瘤细胞株(2D_、2E_5),用ELISA测定杂交瘤细胞培养上清及腹水的效价,后者约为前者的100倍,高达90万～110万。通过平板免疫溶血试验和ELISA双抗夹心法分别对2株杂交瘤分泌的抗LT单克隆抗体(McAb)的特异性进行了试验,结果表     

Knee injury and Osteoarthritis Outcome Score (KOOS) - validation of a Swedish version

The Knee injury and Osteoarthritis Outcome Score (KOOS) is a self-administered instrument measuring outcome after knee injury at impairment, disability, and handicap level in five subscales. Reliability, validity, and responsiveness of a Swedish version was assessed in 142 patients who underwent arthroscopy because of injury to the menisci, anterior cruciate ligament, or cartilage of the knee. The clinimetric properties were found to be good and comparable to the American version of the KOOS. Comparison to the Short Form-36 and the Lysholm knee scoring scale revealed expected correlations and construct validity. Item by item, symptoms and functional limitations were compared between diagnostic groups. High responsiveness was found three months after arthroscopic partial meniscectomy for all subscales but Activities of Daily Living.     

Endovascular management of carotid-cavernous fistulas

Objective To investigate endovascular treatment of traumatic direct carotid-cavernous fistulas （CCF） and their complications such as pseudoaneurysms. Methods： Over a five-year period, 22 patients with traumatic direct CCFs were treated endovascularly in our institution. Thirteen patients were treated once with the result of CCF occluded, 8 twice and 1 three times. Treatment modalities included balloon occlusion of the CCF, sacrifice of the ipsilateral internal carotid artery with detachable balloon, coll embolization of the cavernous sinus and secondary pseudoaneurysms, and covered-stem management of the pseudoaneurysms. Results All the direct CCFs were successfully managed endovascularly. Four patients developed a pseudoaneurysm after the occlusion of the CCF with an incidence of pseudoaneurysm formation of 18.2% （4/22）. A total number of 8 patients experienced permanent occlusion of the ICA with a rate of ICA occlusion reaching 36.4% （8/22）. Followed up through telephone consultation from 6 months to 5 years, all did well with no recurrence of CCF symptoms and signs. Conclusion Traumatic direct CCFs can be successfully managed with endovascular means. The pseudoaneurysms secondary to the occlusion of the CCFs can be occluded with stent-assisted coiling and implantation of covered stents.     

The acutely limping child

Acute limping may be the result of multiple pathologies in children. The differential diagnosis varies based on the age of the child. Irrespective of age, the initial imaging work-up includes AP and frog leg radiographs of the pelvis and ultrasound; MRI may sometimes be helpful. In children less than 3 years, infections and trauma are most frequent. MRI is the imaging modality of choice when osteomyelitis is clinically suspected. Between the ages of 3 and 10 years, transient synovitis of the hip and Legg-Calvé-Perthes disease are main considerations but infection, inflammation and focal bony lesions are also considered. In children over 10 years, slipped capital femoral epiphysis also is considered.     

The role of interventional radiology in trauma

Introduction Interventional Radiology has evolved into a specialty having enormous input into the care of the traumatized patient.In all hospitals,regardless of size,the Interventional Radiologist must consider their relationships with the trauma service in order to     

人体中的镭-226、镭-228、钋-210、铅-210

本文报道了广东阳江高本底地区6名、对照地区8名人尸体的骨²²⁶Ra、²²⁶Ra的浓度以及部分居民内脏器官中。²¹⁰Po、²¹⁰Pb的浓度。结果轰明阳江高本底地区和对照地区居民骨镭-226、镭-228的浓度分别为29.9pCi/kg, 26.9pCi/kgl 8.7pCi/kg, 8.2pCi/kg.由此估算出阳江高本底地区屠民骨中²²⁶Ra、²²⁸Ra的负薄璧及对骨衬、骨髓所产生的剂量当量分别为对照地区民民的3.4倍, 3.3倍。两地区居民内脏器官中^{210Po、210Pb的测定分析铡数较少但仍看出, 高本底地区均明显高于对照地区.}     

Do Balance Board Training Programs Reduce the Risk of Ankle Sprains in Athletes?

Introduction Ankle sprains are the most common musculo-skeletal injury that occurs in athletes,particularly in sports that require jumping and landing on one foot such as soccer,and basketball(1-4).These injuries often result in significant time loss from participation,long-term disability,and have a major impact on health care costs and resources(5-8).