重组人红细胞生成素单克隆抗体的制备

本文应用常规淋巴细胞杂交瘤技术制备了４株能稳定分泌抗人重组红细胞生成素（ｒＨｕＥＰＯ）单克隆抗体（ＭｃＡｂ）的小鼠杂交瘤细胞系ＢⅡ１Ｂ５、ＤⅡ６Ｂ９、ＭⅡ１Ｈ４和ＧＩ３Ｅ７。用鼠单克隆抗体分型试剂盒鉴定，其分泌的ＭｃＡｂ的类分别是ＩｇＭ、ＩｇＭ、ＩｇＧ１和ＩｇＧ２ａ。间接ＥＬＩＳＡ法测定细胞上清的效价为１×１０－２～１．２５×１０－４，腹水效价为１×１０－２～１×１０－８。培养上清经ＥＬＩＳＡ鉴定，与ＩＬ－２、ＧＭ－ＣＳＦ、ＩＦＮ－α等细胞因子均无交叉反应，只与ｒＨｕＥＰＯ特异性结合。     

抗B-CLL Id x抗CD3双特异性抗体的制备及其特性研究

应用无筛选标记细胞株杂交瘤·杂交瘤细胞直接融合法制备了２株分泌抗慢性Ｂ淋巴细胞白血病（Ｂ－ＣＬＬ）Ｉｄｘ抗ＣＤ３双特异性抗体（ＢｓＡｂ）的四价体瘤细胞株。采用间接ＥＬＩＳＡ试验与间接免疫荧光试验证明了该ＢｓＡｂ能分别与Ｂ－ＣＬＬ患者血清及带ＣＤ３标记的细胞特异性结合,经细胞结合试验证明该ＢｓＡｂ同时具备与Ｉｄ及ＣＤ３两种抗原结合能力,经酶桥联法证明该ＢｓＡｂ亚类为ＩｇＧ１×ＩｇＧ２ａ,用ＭＴＴ法证实ＢｓＡｂ能诱导Ｔ细胞活化增殖     

分泌抗金黄色葡萄球菌C1型肠毒素杂交瘤细胞系的建立及初步应用

应用常规方法建立了３株稳定分泌抗金黄色葡萄球菌Ｃ１型肠毒素（ＳＥＣ１）单克隆抗体（ＭｃＡｂ）的小鼠杂交瘤细胞系Ｂ３、Ｃ４和Ｇ８。其中Ｂ３和Ｃ４均为ＩｇＧ１（ｋ），Ｇ８为ＩｇＧ２ａ（ｋ）。Ｂ３和Ｇ８与ＳＥＡ，ＳＥＢ及ＳＥＤ均无交叉反应；Ｃ４虽与ＳＥＡ和ＳＥＤ无交叉反应，但与ＳＥＢ有交叉反应。间接ＥＬＩＳＡ测定小鼠腹水效价为１０＾－５～１０＾－８。应用识别不同表位的ＭｃＡｂ建立了双ＭｃＡｂ夹心ＥＬＩＳ     

rhIL－2调节离体boPBMC增殖和分泌Ig的作用

应用￣３Ｈ－ＴｄＲ掺入法、ＥＬＩＳＡ和ＦＡＣＳ研究了ｒＨＩＬ－２调节离体奶牛外周血单核细胞（ｂｏＰＢＭＣ）免疫应答的特点。ｒｈＩＬ－２能诱导细胞持续性增殖和分泌Ｉｇ，尤其是分泌ＩｇＡ和ＩｇＧ＿２（与ＰＷＭ相比，Ｐ＜０．０１）；还能增强ＰＷＭ诱导的Ｉｇ分泌，但不改变ＳＥＢ抑制Ｉｇ分泌的作用。细胞表型也表明，ｒｈＩＬ－２对ＰＷＭ或ＳＥＢ诱导的ｂｏＰＢＭＣ中ＣＤ４￣＋或ＣＤ８￣＋细胞增殖作用无选择性。     

肿瘤碱性蛋白单克隆抗体免疫学特性的研究及其应用

应用淋巴细胞杂交瘤技术，建立了４株抗人血清肿瘤碱性蛋白（Ｔｕｍｏｕｒｂａｓｉｃｐｒｏ－ｔｅｉｎ，ＴＢＰ）杂交瘤细胞株（１Ｃ３、４Ｆ４、５Ｆ４、３Ｇ９），并以制备的单克隆抗体（ＭｃＡｂ）对其抗原决定簇及免疫学特性进行了分析。Ｉｇ亚类测定：均为ＩｇＧ２ａ，腹水效价为１×１０－６～１×１０－８。特异性测定：ＴＢＰＭｃＡｂ与ＩｇＧ、ＩｇＡ、ＩｇＭ和Ａｌｂ无交叉反应。单抗相加试验证实：５Ｆ４、４Ｆ４和１Ｃ３为识别ＴＢＰ上同一抗原决定簇，３Ｇ９则为识别ＴＢＰ上另一抗原决定簇。分别利用单株和混合株ＭｃＡｂ标酶建立了可应用于人血清ＴＢＰ含量测定的ＥＬＩＳＡ双抗体夹心法，并用于人血清ＴＢＰ含量测定。     

人源性TPO单克隆抗体杂交瘤细胞株的建立

用人源性ＴＰＯ（ｈｕＴＰＯ）皮下免疫ＢＡＬＢ／ｃ小鼠，取脾细胞与ＳＰ２／０实体瘤细胞融合，建立了２株稳定分泌抗ＴＰＯ单克隆抗体的杂交瘤细胞株，分别命名为１９Ｄ１２和４９Ａ５，并对其进行了初步鉴定，采用简易正辛酸法从腹水中纯化单克隆抗体。结果：细胞融合率为８２％，杂交瘤细胞染色体数目正常，分泌的抗体为ＩｇＧ，腹水抗体效价为０．６￣１．２×１０＾－３，与ＥＰＯ、ＧＭ－ＣＳＦ无交叉反应，连续培养生物性状     

抗凝血酶受体单克隆抗体的制备与鉴定

采用杂交瘤技术，获得了４株稳定分泌抗凝血酶受体单克隆抗体（ＭｃＡｂ）杂交瘤细胞株。４株ＭｃＡｂ均为ＩｇＧ１κ链。ＥＬＩＳＡ交叉试验结果表明，该ＭｃＡｂ不与人凝血酶、凝血酶原和ＨＣＶ多肽反应。４株杂交瘤细胞培养上清液效价为３．２×１０－２～１．２８×１０－３，腹水效价为１．６×１０－６～５．１２×１０－７。     

人心肌肌钙蛋白T单克隆抗体的研制及鉴定

以人心肌肌钙蛋白Ｔ（ｃＴｎＴ）为抗原，采用脾内免疫法，免疫ＢＡＬＢ／ｃ小鼠，取其脾淋巴细胞与小鼠Ｓｐ２／０细胞融合，经间接ＥＬＩＳＡ法筛选，三次克隆化后获得５株能稳定分泌抗ｃＴｎＴ单克隆抗体（ＭｃＡｂ）的杂交瘤细胞Ｇ３、Ｇ８、Ｇ１０、Ａ５和Ａ７。免疫球蛋白亚类鉴定其中１株为ＩｇＧ２ａ，４株为ＩｇＭ。染色体数目９２～１１０条。将Ｇ３、Ｇ８、Ｇ１０、Ａ５的单克隆抗体腹水做１：１００稀释与ＬＤＨ、ＣＫ、ＣＫＭＢ和ＧＯＴ等心肌酶均无交叉反应。５株ＭｃＡｂ的腹水效价为３．２×１０－６～１．６×１０－７。ＭｃＡｂ相加试验表明，Ａ５和Ｇ３可识别不同的抗原表位。     

分泌抗金黄色葡萄球菌C1型肠毒素杂交瘤细胞系的建立及初步应用

应用常规方法建立了３株稳定分泌抗金黄色葡萄球菌Ｃ１型肠毒素（ＳＥＣ１）单克隆抗体（ＭｃＡｂ）的小鼠杂交瘤细胞系Ｂ３、Ｃ４和Ｇ８。其中Ｂ３和Ｃ４均为ＩｇＧ１（ｋ），Ｇ８为ＩｇＧ２ａ（ｋ）。Ｂ３和Ｇ８与ＳＥＡ、ＳＥＢ及ＳＥＤ均无交叉反应；Ｃ４虽与ＳＥＡ和ＳＥＤ无交叉反应，但与ＳＥＢ有交叉反应。间接ＥＬＩＳＡ测定小鼠腹水效价为１０－５～１０－８。应用识别不同表位的ＭｃＡｂ建立了双ＭｃＡｂ夹心ＥＬＩＳＡ法检测ＳＥＣ１，敏感性可达１ｎｇ／ｍｌ。     

高效凝胶色谱一步法制备级纯化单克隆抗体

作者采用Ｐｈａｒｍａｃｉａ Ｓｅｐｈａｃｒｙｌ Ｓ－３００凝胶色谱柱，建立了ＩｇＧ类ＭｃＡｂ的一步法制备级纯化方法。该法是将ＭｃＡｂ腹水直接上样，用ｐＨ７．４１０ｍｍｏｌ／Ｌ ＰＢＳ洗脱（流速０．５ｍｌ／ｍｉｎ），即得到纯化的ＭｃＡｂ。一次上样量４０￣５０ｍｌ腹水，回收率为８５％￣９０％。整个纯化周期４ｈ。纯化的ＭｃＡｂ经ＳＤＳ－ＰＡＧＥ测定，纯度〉９０％，免疫组化ＡＢＣ法测定活性为１：８００００     

TheMspI restriction fragment length polymorphism of human aldolase B gene on chromosome 9q21.3–q22.2

The probe containing the exon 9 of human aldolase B gene revealedMspI polymorphism involving two fragments 6.5 and 3.0 kb long with the high frequency of heterozygosity (21%). The two alleles can be distinguished efficiently by the DNA PCR-restriction fragment length polymorphism procedure.     

刚地弓形虫醛缩酶蛋白的表达及其多克隆抗体的纯化

目的:体外制备弓形虫醛缩酶(aldolase)蛋白及其多克隆抗体.方法:以弓形虫cDNA链为模板,PCR扩增醛缩酶基因,构建aldolase/pET30a原核表达系统;IPTG诱导表达aldolase-His6蛋白;用纯化的蛋白加免疫佐剂免疫SD大鼠,收集抗血清,制备多克隆抗体,亲和层析纯化并分析抗体的效价.结果:构建了aldolase原核表达系统,表达并纯化了aldolase-His6蛋白;获得了抗该蛋白的大鼠源性抗血清,纯化后的多克隆抗体效价为1∶4 000.结论:在体外制备并纯化了aldolase-His6蛋白及其多克隆抗体,为后续研究aldolase的功能奠定了基础.     

Congruence of zebrin II expression and functional zones defined by climbing fiber topography in the flocculus

The cerebellum is organized into parasagittal zones with respect to the topography of climbing fiber (CF) afferents and the expression of molecular markers such as zebrin II. Zebrin is expressed by a subset of Purkinje cells that are distributed as a parasagittal array of immunopositive and immunonegative stripes. Several studies in rodents suggest that, in general, CFs to the zebrin negative stripes convey somatosensory information, whereas CFs to the zebrin positive stripes convey information from visual and other sensory systems. The pigeon flocculus consists of four pairs of zebrin+/- stripes (P4 +/- through P7 +/-), however the CF input consists entirely of visual inputs. Thus, because the correspondence of zebrin expression and CF information must be different from that proposed for rodents, we investigated this relationship in the pigeon flocculus. Floccular Purkinje cells respond to patterns of optic flow resulting from self-rotation about one of two axes: either the vertical axis (zones 0 and 2), or a horizontal axis (zones 1 and 3). Visual CF afferents projecting to the flocculus arise from the medial column of the inferior olive (mcIO). Zones 0 and 2 receive input from the caudal mcIO, whereas zones 1 and 3 receive input from the rostral mcIO. We injected a fluorescent anterograde tracer into the rostral and/or caudal mcIO and visualized zebrin expression. There was a strict concordance between CF organization and zebrin labeling: caudal mcIO injections resulted in CFs in zebrin bands P4 +/- and P6 +/-, whereas rostral mcIO injections resulted in CFs in zebrin bands P5 +/- and P7 +/-. Thus, zebrin stripes P4 +/- and P6 +/- correspond to the vertical axis zones 0 and 2, whereas P5 +/- and P7 +/- correspond to the horizontal axis zones 1 and 3. This is the first explicit demonstration that a series of zebrin stripes corresponds with functional zones in the cerebellum.     

Saccharomyces cerevisiae phosphoglucose isomerase and fructose bisphosphate aldolase can be replaced functionally by the corresponding enzymes of Escherichia coli and Drosophila melanogaster

Two glycolytic enzymes, phosphoglucose isomerase and fructose-1,6-bisphosphate aldolase, of Saccharomyces cerevisiae could be replaced by their heterologous counterparts from Escherichia coli and Drosophila melanogaster. Both heterologous enzymes, which show respectively little and no sequence homology to the corresponding yeast enzymes, fully restored wild-type properties when their genes were expressed in yeast deletion mutants. This result does not support notions of an obligatory formation of glycolytic multi-enzyme aggregates in yeast; nor does it support possible regulatory functions of yeast phosphoglucose isomerase.