抗人胎盘酸性铁蛋白McAb的制备及其鉴定

本文应用人胎盘酸性铁蛋白免疫ＢＡＬＢ／ｃ小鼠，经细胞融合制备出３株抗人胎盘酸性铁蛋白（ＰＡＦ）的单克隆抗体（ＭｃＡｂ）。采用酶联免疫吸附试验（ＥＬＩＳＡ）检测证明，此单抗对人胎盘酸性铁蛋白的酸性部分反应较强，而与碱性部分反应较弱；间接免疫荧光法检测此单抗与体外培养的肝癌细胞株７７２１起反应，而与白血病细胞株Ｄａｕｄｉ、肺癌细胞株９２６，以及外周血单个核细胞均不起反应。     

血清酸性铁蛋白测定对肝癌诊断价值的探讨

血清酸性铁蛋白测定对肝癌诊断价值的探讨段永强，卓汉宁人酸性铁蛋白（ａｃｉｄｉｃｉｓｏｆｅｒｒｉｔｉｎＡＩＦ）是铁蛋白的一种异构体，存在于肝癌组织和心肌细胞内。免疫组织化学发现正常肝组织富含硷性铁蛋白（是ＳＦ的另一种异构体），而肝癌组织内ＡＦ含量明显升...     

人Ⅳ型胶原蛋白提取及其单克隆抗体的制备与鉴定

从人胎盘提取Ⅳ型胶原（ＣＯＬⅣ）为抗原，免疫ＢＡＬＢ／ｃ小鼠，取其脾细胞与Ｓｐ２／０骨髓瘤细胞融合，获得３株分泌抗ＣＯＬⅣ单克隆抗体的杂交瘤细胞。间接ＥＬＩＳＡ测定表明，３株ＭｃＡｂ与ＣＯＬⅣ有较强的反应，而与其它３种胶原及４种测试蛋白均无交叉反应。其中２株ＭｃＡｂ的亲和力都在１０（１１）以上。关键词     

酸性同功铁蛋白单克隆抗体免疫学特性的研究

目的：探讨抗不同组织酸性同功铁蛋白（ＡＩＦ）单克隆抗体（ＭｃＡｂ）的免疫学特性。方法：和聚焦层析技术分别从人胎盘和原发性肝癌组织中分离出低ｐＩ值的ＡＩＦ,常规制备ＭｃＡｂ和进行免疫组织化学测定。结果：共筛先到５株抗人胎盘ＡＩＦ和２株抗人原发性肝癌（ＰＨＣ）ＡＩＦ）的ＭｃＡｂ即２ｆ８、４ｇ７、４ｇ８、５ｃ３、７ａ９和４ｃ９、４ｅ２。抗ＡＩＦ ＭｃＡｂｓ ５ｃ３和４ｅ２作用于同一抗株决定簇。使用ＭｃＡ     

抗Ⅳ型胶原单克隆抗体CⅣ的研制与鉴定

用人胎盘Ⅳ型胶原（ＣｏｌⅣ）免疫ＢＡＬＢ／ｃ小鼠，以杂交瘤技术建立了一株能稳定分泌抗ＣｏｌⅣ单抗（ＩｇＧ亚类为ＩｇＧ＿１）的杂交瘤细胞株。其染色体众数为８７。用胚胎及成人组织的免疫组化（ＡＢｃ＾Ｅｃ法）显示：皮肤、肾小球、肾小管、血管内皮、乳腺、肺组织、胎盘、眼球角膜的基底膜均呈特异性阳性染色，命名为Ｃ刊。此抗体的制成，对于较理想、可靠地显示基底膜，判断肿瘤的良恶性及探讨其浸润机制有重要意义。     

抗人Ig轻链系列单抗的研制：Ⅲ抗人Ig游离λ型轻链共同抗原决定…

用多例提纯的ＢＪ－λ混合免疫ＢＡＬＢ／ｃ小鼠的脾细胞与骨髓瘤细胞Ｓｐ２／０融合，获得３株稳定分泌抗人Ｉｇ游离λ链ＭｃＡｂ的杂交瘤细胞株（ＡＨλＤ８、ＡＨλ１Ｃ１和ＡＨλ２Ｃｌ）。它们分泌的ＭｃＡｂ均能与我室所有１７例ＢＪ－λ起强反应，但不与结合的λ型轻链及Ｋ型轻链反应，表明这３株ＭｃＡｂ可能是抗人Ｉｇ游离λ链共同抗原决定簇的。３株ＭｃＡｂ均属小鼠ＩｇＧ１亚类。添加ＥＬＩＳＡ表明它们识别相同的表位。     

抗人Ig轻链系列单抗的研制Ⅲ抗人Ig游离λ型轻链共同抗原决定簇单克隆抗体的制备和初步鉴定

用多例提纯的ＢＪ－λ混合免疫ＢＡＬＢ／Ｃ小鼠的脾细胞与骨髓瘤细胞Ｓｐ２／０融合，获得３株稳定分泌抗人屹游离λ链ＭｃＡｂ的杂交瘤细胞株（ＡＨλＤ８、ＡＨλ１Ｃ１和ＡＨλ２Ｃ１）．它们分泌的ＭｃＡｂ均能与我室所有１７例ＢＪ－λ起强反应，但不与结合的λ型轻链及Ｋ型轻链反应，表明这３株ＭｃＡｂ可能是抗人Ｉｇ游离λ链共同抗原决定簇的．３株ＭｃＡｂ均属小鼠ＩｇＧ１亚类。添加ＥＬＩＳＡ表明它们识别相同的表位。用于检测正常人血清和尿中的游离λ链及多发性骨髓瘤患者的ＢＪ－λ均具有很好的特异性和敏感性．本文还讨论了有关的免疫问题．     

酸性同工铁蛋白在人体肿瘤组织中的表达

酸性同工铁蛋白（ａｃｉｄｉｃｉｓｏｆｅｒｉｔｉｎ，ＡＩＦ）是铁蛋白中的一种异构体，又称癌胚铁蛋白。至今仅有少数实验室能制备抗ＡＩＦ抗体并用于肝癌、乳腺癌和肺癌等肿瘤的血清学和免疫组化研究［１，２］，我们采用自制备的抗ＡＩＦ单克隆抗体检测１４６０例人体...     

抗Ⅳ型胶原单克隆抗体CⅣ的研究与鉴定

用人胎盘Ⅳ型胶原免疫ＢＡＬＢ／ｃ小鼠，以杂交瘤技术建立了一株能稳定分泌抗ＣｏｌⅣ单抗（ＩｇＧ亚类为ＩｇＧ１）的杂交瘤细胞株。其染色体众数为８７。用胚胎及成人组织的免疫组化（ＡＢＣ－ＡＥＣ法）显示：皮肤，肾小球，肾小管，血管内皮，乳腺，肺组织，胎盘，眼球角膜的基底膜均呈特异性阳性染色，命名为ＣⅣ。此抗体的制成，对于较理想，可靠地显示基底膜，判断肿瘤的良恶性及探讨其浸润机制有重要意义。     

小鼠胸腺基质细胞株中细胞多核化现象探讨

在建立小鼠胸腺基质细胞株时发现小鼠胸腺基质细胞株ＭＴＳＣＢ和ＭＴＳＣＣ自发产生多核细胞及单核巨细胞，对上述细胞进行了非特异性酯酶（ＮＳＥ）、酸性磷酸酶（ＡｃＰ）和琥珀酸脱氢酶（ＳＤＨ）反应，多核细胞及单核巨细胞的ＮＳＥ、ＡｃＰ和ＳＤＨ活性均强于单核小细胞。在ＭＴＳＣＢ中多核细胞的百分数为１．１％；ＭＴＳＣＣ中多核细胞为０．６％，实验中对一核细胞和多核细胞出现的百分数与Ｐｏｉｓｓｏｎ分布的理论频率进     

Monoclonal antibodies against murine leukemia viruses: identification of six antigenic determinants on the p 15(E) and gp70 envelope proteins.

Hybrid cells that produced monoclonal antibodies against the envelope proteins of murine leukemia virus (MuLV) were prepared by the polyethylene glycol-mediated fusion of a mouse myeloma cell line with lymphocytes from mice immunized with allogeneic MuLV-producing leukemia cells. Twenty-three independent cell lines were cloned and inoculated into syngeneic mice for the production of ascites fluids that contained high-titered (20–75 mg/ml) monoclonal antibodies. Six serologically distinct specificities were detected when these ascites fluids were tested on a broad panel of MuLV and non-murine retra iruses. Prototype cell lines producing monoclonal antibodies that were representative of each pattern of reaction were selected for further study. In immune precipitation assays each of the prototype antibodies reacted with viral envelope proteins; three of these identified antigenic determinants on p15(E), while three others identified antigenic determinants on gp70. The p15(E) antigenic determinants were shared by a diverse panel of MuLV. One of these p15(E) antigenic determinants was also found in feline leukemia virus. The gp70 antigenic determinants, on the other hand, had a more restricted distribution and were found in only selected isolates of MuLV.     

Neurofilament-like pattern of reactivity in human foetal PNS and spinal cord following immunostaining with polyclonal anti-glial fibrillary acidic protein antibodies

Summary The intermediate filament protein, glial fibrillary acidic protein (GFAP), is widely used as a cell-specific marker molecule for immunocytochemical identification of astrocyte lineages in cell culture, in tissues during development, and in tissues undergoing pathological changes. This study demonstrates that a reaction pattern of two commercially available polyclonal anti-GFAP antibodies shows extensive similarity to the pattern of reactivity obtained with monoclonal antibodies to neurofilaments in the PNS and spinal cord of human embryos and foetuses, at 5 to 12 weeks of gestation. The polyclonal antibodies to GFAP labelled populations of neurons and their processes in the PNS and in the spinal cord. Monoclonal antibodies to GFAP only labelled glial cells in the spinal cord. Neurofilament adsorption of one of the anti-GFAP antisera abolished the neurofilament-like reaction pattern, while the structures also labelled with monoclonal antibodies to GFAP remained immunostained. The results presented may question previously published data obtained with these and possibly other polyclonal anti-GFAP antibodies.     

Persistent and enhanced expression of c-fos gene products in various kinds of human hematopoietic cell lines. Immunofluorescence study using prepared monoclonal antibodies

Two kinds of monoclonal antibodies recognizing fos proto-oncogene (c-fos) products were prepared using a synthetic oligopeptide corresponding to amino acids 127-152 of the fos oncogene products. These monoclonal antibodies (FO-120 & FO-145) detected fos gene products induced in a human monocyte cell line (U-937) by phorbol acetate (TPA) and induced in both human and mouse fibroblast cell lines (284, BALB/c 3T3) by serum-stimulation. One of the monoclonal antibodies (FO-120) reacted with 50-kDa and 42-kDa proteins and the other antibody (FO-145) reacted with a 30-33-kDa protein. The expression of the fos gene in various human hematopoietic cell lines was investigated using these prepared monoclonal antibodies. While almost all hematopoietic cell lines tested reacted with these monoclonal antibodies to various degrees, the majority of normal peripheral blood lymphocytes cultured with lectin (PHA) and interleukin 2 (IL-2) did not, suggesting that cells of some permanent hematopoietic cell lines, irrespective of their lineage specificity and growth factor dependency, continuously express the fos oncogene. These monoclonal antibodies may be useful for detecting early neoplastic changes in hematopoietic cells.     

抗早孕因子单克隆抗体的制备与鉴定

目的建立分泌抗EPF(Early pregnancy factor,早孕因子)单克隆抗体的杂交瘤细胞株,纯化单抗并鉴定.方法用本实验室已纯化的早孕和肿瘤源性EPF作为抗原刺激Balb/c小鼠,用免疫后的小鼠脾细胞与同系小鼠骨髓瘤细胞(NS-1)融合,经4次克隆化,获得可稳定分泌抗EPF单克隆抗体的细胞株,注入Balb/c小鼠腹腔制备腹水型单抗,Protein-A亲和层析纯化,SDS电泳和Western-blot等方法分析纯化结果.结果融合后获得一株稳定分泌抗EPF抗体的细胞株(C3D11),克隆化后,获得稳定分泌抗EPF单克隆抗体的细胞株,将增殖后的细胞注射Balb/c小鼠腹腔获得腹水型单抗,以亲和层析法纯化,SDS-PAGE分析显示纯化后去掉了大部分杂蛋白,免疫印迹分析抗体纯度较高,与抗原匹配性良好.结论本研究制备的EPF单克隆抗体为特异性抗EPF抗体.     

PERSISTENT and ENHANCED EXPRESSION OF c-fos GENE PRODUCTS IN VARIOUS KINDS OF HUMAN HEMATOPOIETIC CELL LINES. Immunofluorescence Study Using Prepared Monoclonal Antibodies

Two kinds of monoclonal antibodies recognizing fos proto-oncogene (c-fos) products were prepared using a synthetic oligopeptide corresponding to amino acids 127-152 of the fos oncogene products. These monoclonal antibodies (FO-120 & FO-145) detected fos gene products induced in a human monocyte cell line (U-937) by phorbol acetate (TPA) and induced in both human and mouse fibroblast cell lines (284, BALB/c 3T3) by serum-stimulation. One of the monoclonal antibodies (FO-120) reacted with 50-kDa and 42-kDa proteins and the other antibody (FO-145) reacted with a 30-33-kDa protein. The expression of the fos gene in various human hematopoietic cell lines was investigated using these prepared monoclonal antibodies. While almost all hematopoietic cell lines tested reacted with these monoclonal antibodies to various degrees, the majority of normal peripheral blood lymphocytes cultured with lectin (PHA) and interleukin 2 (IL-2) did not, suggesting that cells of some permanent hematopoietic cell lines, irrespective of their lineage specificity and growth factor dependency, continuously express the fos oncogene. These monoclonal antibodies may be useful for detecting early neoplastic changes in hematopoietic cells. ACTA PATHOL JPN 38: 1523-1536, 1988.     

Monoclonal antibodies against a preadipose cell line (MC3T3-G2/PA6) which can support hemopoiesis

Monoclonal antibodies against a mouse preadipose cell line (MC3T3-G2/PA6:PA6), which can support hemopoiesis by direct cell-to-cell interaction, were produced and characterized. The antibodies react with PA6 but not PA6-M (a mutant cell line) which has the capacity neither to contact with hemopoietic stem cells (HSCs) nor to support hemopoiesis. Endosteal cells in the bone marrow show positive staining to these antibodies. They inhibit pseudoemperipolesis of PA6 to HSCs, resulting in a significant decrease in hemopoietic cell number. These findings suggest that the monoclonal antibodies bind to the stromal cell receptors for HSCs and block the binding of HSCs to stromal cells leading to suppression of hemopoiesis.     

Production and use of monoclonal antibodies for the detection of apple chlorotic leaf spot virus

Stable hybridoma cell lines secreting antibodies specific for the apple chlorotic leaf spot virus (CLSV) were produced by fusing spleen cells of a Biozzi mouse immunized with CLSV P863 strain, with the non-secretory P3 X63 Ag8.653 myeloma cell line. Two hybridoma clones producing monoclonal antibodies of the IgG1 subclass were obtained. These monoclonal antibodies were used for virus detection by enzyme-linked immunosorbent assay (ELISA). In contrast to polyclonal antisera to CLSV, which always contain some antibodies to host components, monoclonal antibodies are highly specific for the virus. It was thus possible to develop a detection assay which is more sensitive and specific than the assays using polyclonal antibodies. Using monoclonal antibodies, it was possible to detect less than 0.1 ng/ml of purified virus. In addition, these two monoclonal antibodies recognize 17 strains or isolates maintained in our laboratory and representing most of the known CLSV strains.     

抗葡萄球菌肠毒素A单克隆抗体及其分析

葡萄球菌肠毒素A(Staphylococcal Enterotoxin A,简称SEA)免疫的BALB/c小鼠脾细胞与骨髓瘤细胞SP2/0-Ag-14杂交。筛选到4株分泌抗SEA单克隆抗体的细胞:42、44、49和58。对其培养上清液或体内培养所产生的腹水,经纯化后进行放射免疫分析。结果表明其分泌抗体,对SEA抗原特异性高,具有较高活性。另对细胞株44作了敏感度分析,只需3ng非标记SEA即可使~(125)I-SEA与抗SEA单克隆抗体的结合达50％抑制。还观察了杂交瘤细胞的生长与产生抗体量的关系,可供大规模生产抗体参考。     

Monoclonal antibody analysis of responder and stimulator cells in the human autologous mixed lymphocyte reaction

Responder and stimulator cell subpopulations in the autologous mixed lymphocyte reaction (AMLR) were determined with the OK series of monoclonal antibodies. Mitomycin-C-treated, monocyte-enriched cell populations were used as stimulator cells in the AMLR. Treatment of these monocytes with either OKM and/or OKI monoclonal antibodies and complement resulted in a marked loss of ability of these cells to act as stimulators in the AMLR. Removal of OKT3+ and OKT4+ cells diminished the proliferative responses of AMLR cultures. Interaction of T cells with autologous monocytes resulted in generation of cells capable of suppressing both MLR and AMLR cultures. The suppressor activity of these cells was diminished by treatment with OKI , OKT4 or OKT8 monoclonal antibodies. No cytotoxic activity to autologous or allogeneic monocytes was observed. Additional studies showed an increased number of OKT9 + and OKI + as well as OKT8+ T cells in the AMLR responder cell population. This study indicates that cultures of T lymphocytes with autologous monocytes yield T cell subset(s) which suppress MLR and AMLR reactivity.