分泌抗H_(615)单克隆抗体杂交瘤细胞系的建立

用抗正常615纯系小鼠肝细胞抗体处理的H615瘤细胞免疫Balb/c小鼠、取其脾细胞与小鼠骨髓细胞融合、以间接免疫荧光法和细胞ELISA二种方法检测、建立两株分泌抗H615单克隆抗体的杂交瘤细胞系。两杂交瘤细胞系所产生的单克隆抗体与正常615小鼠的肝、脾、肺、肾、心肌、横纹肌、胸腺的组织细胞和小鼠肿瘤细胞及人肝癌细胞无交叉反应,证明两种单克隆抗体具有一定的特异性。对两种单克隆抗体进行亚类检定均属IgG_1。     

Establishment of anti-thyrotropin monoclonal antibody hybridoma cell lines with extract of human pituitary gland

Theproductionofanti--humanthyroid--stimulatinghormone(anti--hTSH)monoclonalantibody(McAb)isofgreatimportanceinbothmedicalresearchandclinicaldiagnosis.Howeveritwasnoeasyjobproducinganti--hTSHMcAbswithhighspecificityasseveralglycoproteinhormones,includinghumanfollicle--stimulatinghormone(hFSH),humanluteinizinghormone(hLH),humanchorionicgonadotropin(hCG)andhTSH,containthesameasubunit.Inspiteofthis,Josephine['],RidgwayetalLZjhaveobtainedMcAbwithhighspecificityandaffinitybyusingpurehTSHa…     

分泌抗体的杂交瘤细胞株的制备

目的应用杂交瘤技术制备出分泌抗肺癌抗体杂交瘤细胞株,为肺癌的早期诊断和免疫治疗提供可能靶点．方法用肺癌细胞株作免疫原免疫健康BALB／C小鼠,取其脾细胞与小鼠骨髓瘤细胞融合,获得分泌高滴度抗肺癌抗体的杂交瘤细胞株,用间接ELISA和检测单抗体的特异性,双抗体夹心法测定免疫球蛋白同种型．结果通过细胞融合,筛选出2株持续分泌抗肺癌抗体的杂交瘤细胞株C5、B8,其分泌的抗体为IgM亚类,κ亚型,并和肺癌细胞发生特异性反应．结论成功完成细胞融合,制备了分泌抗体的杂交瘤细胞株．     

分泌抗活化小鼠T细胞抗原单克隆抗体杂交瘤细胞株的建立

用Con A活化的小鼠脾脏细胞免疫同品系动物(BALB/c鼠),取免疫鼠的脾细胞与小鼠骨髓瘤细胞(SP2/0)融合,选择了一株有分泌抗活化小鼠T细胞抗原抗体的杂交瘤细胞,经有限稀释法连续4次克隆化。采用ELISA法分析,初步证实该杂交瘤细胞所分泌的单克隆抗体(McAb)与Con A 活化的小鼠脾细胞的结合反应明显高于与未经活化的其他细胞(胸腺细胞、肠系膜淋巴结细胞、脾细胞)的反应。用琼脂双扩散法证明该MeAb属于小鼠IgG类。     

人垂体提取液免疫建立促甲状腺素单抗杂交瘤细胞株

获取分泌结合力和特异性均好的抗人促甲状腺素单克隆抗体的杂交瘤细胞株。方法；用人重体提取液为免疫原，免疫ＢＡＬＢ／ｃ小鼠，以聚乙二醇为融合剂，亚克隆三次。结果；获得２株分泌与ｈＴＳＨ特异性结合的单克隆抗体杂交瘤细胞株，所分泌的免疫球蛋白为ＩｇＧ１，液相中与ｈＴＳＨ的最大备ｈＴＳＨ单克隆抗体；２．此２株单克隆抗体的获得为建立敏感的ｈＴＳＨ测定方法奠定了基础。     

基因免疫制备抗SARS病毒N蛋白单克隆抗体

目的通过基因免疫方法,制备抗SAILS病毒N蛋白的单克隆抗体并对单抗进行初步鉴定。方法将含有N蛋白的编码基因的真核重组质粒pSecTagB／N免疫BALB／c小鼠,然后取鼠脾细胞与骨髓瘤细胞融合,用原核表达的SARS病毒N蛋白筛选阳性克隆。然后通过免疫印迹法进一步证明抗体对N蛋白的特异性,用ELISA方法检测抗体对灭活SARS全病毒的免疫反应。结果筛选得到10株抗N蛋白的单克隆抗体,ELISA和免疫印迹结果表明这些抗体特异性针对N蛋白上的抗原决定簇,且有7株抗体对SARS灭活病毒有阳性反应。结论所得的单克隆抗体特异针对N蛋白。     

岩沙海葵毒素单克隆抗体的制备及其鉴定

目的建立岩沙海葵毒素（Palytoxin,PTX）高特异性单克隆抗体杂交瘤细胞株。方法将PTX偶联成具有免疫功能的PTX-PDP-KLH完全抗原,免疫雌性6—8周龄Balb／c小鼠,利用传统杂交瘤技术制备PTX单克隆抗体。并通过间接酶联免疫吸附测定（ELISA）方法筛选克隆阳性杂交瘤细胞株。结果获得能稳定分泌抗PTX单克隆抗体的杂交瘤细胞株B8,与载体蛋白没有发生交叉反应。SDS—PAGE分析表明,McAb B8在50KD和25KD处各出现一条条带,与IgG的重链和轻链的大小相符。结论研究制备了特异性单克隆抗体PTX,为进一步建立快速检测、鉴定海产品中岩沙海葵毒素的方法,奠定有效的实验基础。     

应用细胞芯片捕获人正常胃细胞系、胃癌细胞系细胞并检测其细胞表面CD表型的差异

目的 构建一种细胞芯片,根据芯片表面固定的CD抗体与细胞膜表面CD抗原免疫结合原理捕获细胞,检测人正常胃黏膜细胞系GES-1、胃腺癌细胞系7901细胞表面CD抗原表达的差异.方法 将64种CD抗体蛋白固定在化学修饰醛基玻片上制成抗体阵列,将GES-1、7901细胞用胶原酶消化制成单个细胞悬液,用吖啶橙荧光标记后与芯片进行孵育,洗去芯片上游离的细胞,激光扫描仪检测芯片上CD抗体各点捕获到细胞的荧光信号,以此判定GES-1、7901细胞膜表面CD表型情况.结果 发现CD9、CD13、CD29、CD44、CD49、CD55、CD71、CD95抗体点均捕获到GES-1、7901细胞;CD15、CD24抗体点仅捕获到GES-1细胞;CD77、CD133、CD103、CD64抗体点仅捕获到7901细胞.结论 CD15和CD24可能是人正常胃黏膜细胞系GES-1细胞的表面标志物,CD77、CD133、CD103、CD64可能是人胃癌细胞系7901细胞的标志物.     

应用蛋白质组学技术筛选鉴定锌指蛋白139调控的胃癌转移相关蛋白质

目的以胃癌SGC7901细胞原位移裸鼠模型为对象,通过荧光双向差异凝胶电泳（2D-DIGE）结合液质联用（LC-MS）质谱
分析技术鉴定ZNF139 调控的胃癌转移相关蛋白质。方法合成针对ZNF139 的小干扰RNA（ZNF139-siRNA）,以
ZNF139-siRNA转染人胃癌细胞株SGC7901,G418筛选。以ZNF139-siRNA质粒转染的胃癌细胞、阴性质粒转染的胃癌细胞
及普通胃癌细胞分别进行裸鼠胃癌原位移植。造模成功后取出原位移植瘤及腹腔转移淋巴结。荧光双向差异凝胶电泳
（2D-DIGE）技术分别分离ZNF139-siRNA 各组原位移植瘤及腹腔转移淋巴结蛋白质;选定差异点,胶内酶解后,液质联用
（LC-MS）质谱分析技术鉴定蛋白质。蛋白印迹（Western blot）技术验证差异蛋白质的表达。结果转染ZNF139-siRNA质粒后
SGC7901细胞中ZNF139的表达受到有效抑制。与阴性质粒组及空白组比较,阳性质粒组原位移植瘤生长更慢（P<0.05）,且腹
腔淋巴结转移率更低（P<0.05）。蛋白质组学结果发现在阳性质粒组原发灶中Fascin、hnRNPA2/B1表达下调,ANXA1表达上
调;阳性质粒组转移淋巴结中ANXA5表达下调（P<0.05）。Western blot验证结果与蛋白质组学结果相符。结论ZNF139可能
通过调节Fascin、hnRNPA2/B1、ANXA1、ANXA5促进胃癌淋巴结转移。
     

抗HER2/neu单克隆抗体的制备及其对乳腺癌细胞生长的抑制性

目的 制备抗HER2／neu的特异性单克隆抗体，筛选出能够分泌抑制p185 HER2／neu蛋白过表达的肿瘤细胞生长的单抗杂交瘤细胞株。方法 原核表达含全长neu蛋白的融合蛋白，免疫Balb／c雌性小鼠后取效价高的小鼠尾静脉加强后行脾细胞与SP2／0细胞进行细胞融合。以ELISA、免疫细胞化学、免疫组织化学、细胞免疫荧光和MTT法进行筛选。结果 共获得8株稳定分泌HER2／neu单抗的杂交瘤细胞株，其中5株细胞产生的抗体体外实验能够抑制乳腺癌细胞HBT133的生长。结论 能够抑制HBT133细胞生长的5株杂交瘤细胞株可以用作人源化，具有较高的临床应用价值。     

GENERATION AND PARTIAL CHARACTERIZATION OF MONOCLONAL ANTIBODIES AGAINST SOLUBILIZED MEMBRANE FRACTION OF HUMAN SPERMATOZOA

Human sperm membrane antigens extracted by deoxycholate (DOC) were used to immunizeBALB/c mice.Hybrid cell lines secreting sperm-specific monoclonal antibodies were generatedby cell fusion in a semi-solid medium and screened by indirect immunofluorescent assay usinglive and methanol-fixed sperm.Out of 850 hybrid clones from cell fusion,28 were shownto secrete sperm-specific antibodies which reacted with the acrosome,equatorial segment,whole surface plasma membrane or tail of spermatozoa.Finally,seven hybrid cell lineswere established and shown to secrete monoclonal antibodies which had no cross-reactivitywith arty human tissues other than testis and sperm.The majority were also shown toinhibit fertilization of mouse oocytes in vitro and human sperm penetration of zona-freehamster ova.Western blot analysis revealed that some of these antibodies reacted withsperm membrane antigens of distinct molecular size.     

人膀胱肿瘤细胞的荧光标记及其移植模型的整体荧光成像

目的对人膀胱移行细胞癌T24细胞进行荧光标记并建立其可在活体荧光成像系统下直接观察肿瘤生长及转移的简便、可靠的原位移植模型。方法以绿色荧光蛋白作为标记基因导入人类膀胱移行细胞癌T24细胞株中,经梯度浓度G418筛选获得稳定表达绿色荧光蛋白的细胞克隆并扩大培养,然后接种于裸小鼠膀胱壁内及颈部皮下,活体荧光成像系统直接观察肿瘤的生长与转移,并与常规石蜡切片苏木素-伊红(HE)染色比较。结果经绿色荧光蛋白标记的人膀胱肿瘤T24细胞在荧光显微镜下发出绿色荧光,并可在体内、外持续稳定表达。膀胱原位接种5×105个转染后的膀胱肿瘤细胞后1周即可在荧光成像系统下观察到下腹部新生膀胱肿瘤发出绿色荧光,2周后膀胱肿瘤可被触及,4周后经解剖可在荧光成像系统下观察到腹膜后及盆腔淋巴结等远处转移。结论绿色荧光蛋白能够在T24人膀胱肿瘤细胞中长期稳定表达,用绿色荧光蛋白标记的人膀胱肿瘤T24细胞建立的裸鼠原位移植模型为进一步研究膀胱肿瘤提供了一种简便、可行的新方法。     

抗重组人乳腺珠蛋白单克隆抗体的制备及其特异性鉴定

目的通过杂交瘤技术获得特异性抗hMAM单克隆抗体,为进一步研制基于hMAM的乳腺癌早期诊断试剂盒奠定基础。方法以纯化的重组蛋白为抗原免疫Balb/c小鼠,运用杂交瘤技术制备、间接ELISA法及免疫组化法筛选出能稳定分泌特异性抗hMAM的单克隆抗体细胞株。结果通过杂交瘤技术获得了2株能分泌特异性抗hMAM单克隆抗体的杂交瘤细胞株hMAM-A2及hMAM-B7,其分泌的单克隆抗体亚类均属于IgG1,Western blotting结果显示2株细胞分泌的单克隆抗体特异性强能与34kDa处的hMAM抗原形成单一的蛋白质显色条带,免疫组化结果显示其仅与乳腺癌组织呈阳性反应,与其他肿瘤组织不发生交叉反应。结论利用鼠-鼠杂交瘤技术成功的制备了2株稳定分泌高效价、高特异性抗hMAM的杂交瘤细胞株。     

与人胃癌反应的单克隆抗体GL—013

应用B-细胞杂交瘤技术,以胃癌转移淋巴结中的癌细胞为免疫原,经ABC-免疫组织化学方法筛选,研制出一种鼠单克隆抗体GL-013。免疫亲和层析纯化抗原,Western Blot鉴定抗原分子量约大于200kd的糖蛋白,抗原对1%过碘酸处理敏感,与CEA、NCA和血型前体Lewisy抗原不相关。免疫组化研究表明抗体与胃癌有较高的特异性,抗原的表达与转移相关。     

人胃癌细胞悬液裸小鼠原位移植模型建立及其部分生物学特性

目的 建立人胃癌裸小鼠原位移植模型,观察其部分生物学特性。方法 用人胃低分化腺癌细胞（ＳＧＣ－７９０１）悬液种植于小裸小鼠胃壁,观察原位移植瘤的生长情况、移植成功率和自发转移的发生率。结果 原位移植成功率（成瘤率）为６７％。移植瘤的局部淋巴结转移率８５％,远处淋巴结转移率５０％,肝转移发生率３０％。荷瘤鼠的中位生存期为１６周,晚期出现消瘦和全身衰竭。结论 该裸小鼠原位移植模型具有人胃癌自然生长过程     

抗人心肌肌凝蛋白轻链Ⅰ单克隆抗体的制备和鉴定

以人心肌肌凝蛋白轻链I免疫Balb/c小鼠,取其脾淋巴细胞与NS-1细胞融合,经过筛选、克隆化和再克隆已获得3-D_3、2-D_9、1-E_(10)和2-E_(10)等4个分泌特异性单克隆抗体的杂交瘤细胞株。经免疫酶标和放免方法测定抗体工作滴度为1:1万。流动式荧光密度计检测NS-1、小鼠脾和杂交瘤细胞DNA的含量,结果表明杂交瘤细胞的DNA含量相当于NS-1和小鼠脾细胞DNA含量之和。杂文瘤细胞传代半年以上稳定地分泌特异性的单克隆抗体。用两个单抗进行了抗原双决定簇的放免測定,并制备了高效价的小鼠腹水。     

Studies on monoclonal antibody against recombinant human granulocyte colony-stimulating factor.

Three hybridoma cell lines producing monoclonal antibodies (McAb) against recombinant human granulocyte colony-stimulating factor (rhG-CSF) have been established by fusing mouse myeloma cell line SP2/0 cells with spleen cells from a BALB/c mouse immunized with rhG-CSF. Ascites was obtained from BALB/c mice by injecting the hybridoma cells intraperitoneally. Three McAbs were purified by the caprylic acid-ammonium sulfate method. For each, the IgG subclass, valence and activity, molecular weight, specificity and affinity were determined. The applications of McAbs against rhG-CSF in the clinic and laboratory are discussed.     

Monoclonal anti-idiotype antibody bearing the internal image of nasopharyngeal carcinoma associated antigen

目的　制备和鉴定具有鼻咽癌相关抗原内影像的抗独特型单克隆抗体 (Ab2 )。方法　用鼻咽癌单抗 (Ab1)免疫小鼠 ,免疫鼠脾细胞与骨髓瘤细胞SP2 / 0融合获得杂交瘤细胞系。用SandwichELISA和结合抑制试验筛选阳性克隆。为进一步证实Ab2是否具有鼻咽癌相关抗原的内影像 ,用Ab2免疫小鼠获得抗血清 ,以ELISA和竞争抑制试验检测Ab3。用迟发性变态反应和T细胞增殖试验检测Ab2诱导的细胞免疫反应。结果　选用两株抗鼻咽癌单抗FC2、HNL5 (Ab1)为免疫原 ,制备两株抗相应Ab1独特型的抗独特型抗体 2H4和5D3(Ab2 )。 2H4、5D3能分别与FC2、HNL5特异性结合 ,并能抑制相应Ab1与靶细胞HNE2的反应 ,诱导产生能与相应Ab1竞争结合靶抗原的抗抗独特型抗体 (Ab3)。并能诱发特异性迟发型超敏反应 (DTH)和细胞增殖反应。结论　抗独特型抗体 2H4、5D3具有鼻咽癌相关抗原的内影像 (Ab2 β) ,能模拟鼻咽癌相关抗原诱导体液和细胞免疫反应。     

Characterization and evaluation of a novel anti-MUC-1 monoclonal antibody: induction of the idiotypic network in experimental mice

Objective To investigate the anti-idiotypic effect induced by a monoclonal antibody. Methods A conventional fusion method was used to obtain hybridoma cells produing monoclonal antibody, which were detected by flow cytometry. ELISA were used to detect the humoral response induced by the antibody in mice. Cytotoxic and proliferation experiments were used to detect the cellular response induced by the antibody in mice. Results CS20 is a MUC-1 specific monoclonal antibody that strongly reacts with MUC-1 antigen expressed on the cell surface of breast cancer cells. The antibody could not kill tumor cells directly through complement-dependant cytotoxicity or antibody-dependant cell-mediated cytotoxicity. However, after 6 administrations of mAb CS20-KLH (keyhole limpet hemocyanin) conjugated to BALB/c mice (n=5) at a dose of 50 μg/mouse, anti-idiotypic antibodies and anti-anti-idiotypic antibodies were induced. T cells derived from CS20-KLH-immunized mice responded to mAb CS20, indicating the existence of idiotype-specific T cells. Conclusion These data indicated the possibility of using MUC-1 specific antibody for active immunotherapy of breast cancer.     

Studies on monoclonal anti-idiotypic antibodies to human B cell leukemia

Murine immunocytoma cell line, NS-1, was fused with spleen cells of Balb/C mice which had been stimulated by tolerogenic disaggregated human gamma globulin and immunized by purified serum IgM from the patient with chronic B cell leukemia (B-CLL). 10 hybridoma cell lines secreting monoclonal anti-idiotype (anti-Id) antibodies to human CLL were obtained. The McAbs were subclasses belonging to IgM and of IgG mouse. Specificity and biologic characters of the monoclonal anti-Id antibodies from culture fluid or ascites were assayed by ELISA, indirect mixed ELISA sandwich, ELISA inhibition, immunofluorescence (IF) and IF inhibition. The study also proved that monoclonal anti-Id antibodies could react with homologous IgM, but not with Ig from normal donors or a panel of patients with myeloma. The results of IF and IF inhibition assay showed that monoclonal anti-Id antibodies were bound to lymphocytes of patient with B-CLL. Their reactivity was inhibited by homologous IgM, but not by lymphocytes of patients with ALL or lymphoma. Monoclonal anti-Id antibodies were heterogenous reactive patterns with cell lines in vitro.