器官移植Issue(3)：146-151,6.DOI:10.3969/j.issn.1674-7445.2015.03.004
肾移植受者血清抗血管内皮细胞特异性抗体的提取和纯化
Extraction and purification of serum specific endothelial cell antibody of renal transplant recipients
摘要
Abstract
Objective To investigate the extraction and purification methods of serum specific endothelial cell antibody of renal transplant recipients with rejection after renal transplantation.Methods Human umbilical vein endothelial cell (HUVEC)was isolated and cultured.The serum samples of the renal transplant recipients with poor renal function after renal transplantation were collected.Specific endothelial cell antibody was screened out with flow cytometry;antibodies against human leukocyte antigen (HLA)and major histocompatibility complex class Ⅰ-related chain A (MICA)were detected by Luminex platform.After the existence of specific endothelial cell antibody in the serum sample was confirmed,specific endothelial cell antibody was absorbed with HUVEC.The cell was washed and then the absorbed antibody was eluted from the cell membrane.Antibody IgG in the eluent was purified and concentrated again with Protein-A /G magnetic beads.Antibody activity in the eluent was detected by flow cytometry and the purified specific endothelial cell antibody (IgG)was identified by SDS-polyacrylamide gel (SDS-PAGE)and Western blot.Results In the serum of 386 renal transplant recipients,the serum samples of 5 renal transplant recipients with serum creatinine (Scr) >400 μmoI /L,negative anti-HLA antibody,negative anti-MICA antibody and median fluorescence intensity (MFI) >16 were selected.Purified specific endothelial cell antibody IgG showed immunoglobulin heavy chain (purity > 95%)by SDS-PAGE gel.Flow cytometry showed that the purified antibody had the feature of rebinding with the surface antigen of vascular endothelial cell.Conclusions The purification method of using human umbilical vein endothelial cell to absorb specific endothelial cell antibody in the serum of renal transplant recipients may obtain good effect.关键词
肾移植/免疫排斥反应/抗血管内皮细胞特异性抗体/抗体吸附/人血管内皮细胞Key words
Renal transplantation/Immunological rejection/Specific endothelial cell antibody/Antibody absorption/Human vascular endothelial cell分类
医药卫生引用本文复制引用
刘丹,胡娟,刘萍,罗伟光,李婷婷,郭靖,明英姿,邹义洲..肾移植受者血清抗血管内皮细胞特异性抗体的提取和纯化[J].器官移植,2015,(3):146-151,6.基金项目
国家自然科学基金（81273265）；湖南省科技重点项目（2013FJ2005）；湖南省医学卫生科技项目（B2013-003）；湖南省高校2011创新协同中心生物发育与新产品创新研发中心支持项目 （）
