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酸性同功铁蛋白单克隆抗体免疫学特性的研究 |
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游上游① 张楚瑜 黄巍② 易先平②
摘 要 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:应用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:共筛选到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均与各自AIF分子上不同抗原决定簇结合,其中针对不同组织AIF的McAb 5c3和4e2作用于同一抗原决定簇。使用McAb 2f8和4c9,对正常肝组织、慢性肝炎与肝硬化和PHC肝组织进行了免疫组织化学检查,其阳性率分别为2f8:0、10.0%、76.3%;4c9:0、6.7%、81.6%。结论:人胎盘和PHC组织AIF中存在着共同的抗原决定簇,抗PHC AIF McAb在免疫诊断中优于抗人胎盘AIF McAb。 关键词 酸性同功铁蛋白 单克隆抗体 免疫组织化学 中国图书分类号 R392.11
Study on immunological characteristics of anti-AIF McAbs
YOU Shang-You, ZHANG Chu-Yu, HUANG Wei et al. Life Science College,Wuhan University,Wuhan 430072
Abstract Objective:Study on immunological characteristics of McAbs against human acidic isoferritin (AIF) from different tissues. Methods:Preparation of AIF with low pI value by chromatofocusing technique and McAb using hybridoma technique.Results: Seven hybridoma cell lines secreting specific monoclonal antibody(McAb),that is,five against human placental AIF(2f8,4g7,4g8,5c3,7a9)and two against primary hepatic carcinoma(PHC)AIF(4c9,4e2),were raised.Seven McAbs recognized different antigen epitopes of AIF from different tissues,but McAb 5c3 and 4e2 recognized the same antigen epitope of AIF. LSAB immunohistochemical study using McAb 2f8 and 4c9 shown that positive staining rates of liver tissue with normal, chronic hepatitis and cirrhosis, and PHC were 0,10.0%,76.3% and 0,6.7%,81.6% respectively. Conclusion:There is the same antigenic determanent between PHC AIF and placental AIF , and anti-PHC AIF McAb is better than anti-placental AIF McAb in immunodiagnosis of PHC. Key words Acidic isoferritin Monoclonal antibody Immunohistochemistry
目前,一般认为酸性铁蛋白(Acidic ferritin,AF)是一种肿瘤相关抗原,证据之一是排除了铁负荷过多后,许多肿瘤患者血清铁蛋白浓度升高,而组织铁储量并未增加[1] ;证据之二是在移植有人肿瘤的裸鼠血清中检测到铁蛋白,而将肿瘤摘除后,血清中的铁蛋白亦消失,说明肿瘤细胞分泌胞外铁蛋白[2] 。AF可从人胎盘、心脏或恶性肿瘤等组织中制备、纯化。本文是在纯化了不同组织AF基础上,进一步分离出AF中更具癌胚性质的低等电点(pI)部分,称为酸性同功铁蛋白(Acidic isof[1] [2] 下一页 上一个医学论文: 肿瘤坏死因子 诱导淋巴细胞化学发光及其增殖的研究 下一个医学论文: 一株特殊功能的抗人CD40单克隆抗体的获得及其生物学特性分析
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