
浏览全部资源
扫码关注微信
西南交通大学医学院,四川成都
张 睿,E-mail:echorayray@qq.com
收稿日期:2023-12-02,
修回日期:2024-06-20,
纸质出版日期:2025-08-15
移动端阅览
周金锐,王文皓,顾亚茹,等.基于单个记忆B细胞测序技术构建毒素蛋白Hcp免疫组库及抗体表达[J].陆军军医大学学报,2025,47(15):1782-1791.DOI:10.16016/j.2097-0927.202312007.
ZHOU J R,WANG W H,GU Y R,et al.Construction of Hcp immunohistochemical library and antibody expression based on single memory B cell sequencing technology[J].J Army Med Univ,2025,47(15):1782-1791.DOI:10.16016/j.2097-0927.202312007.
周金锐,王文皓,顾亚茹,等.基于单个记忆B细胞测序技术构建毒素蛋白Hcp免疫组库及抗体表达[J].陆军军医大学学报,2025,47(15):1782-1791.DOI:10.16016/j.2097-0927.202312007. DOI:
ZHOU J R,WANG W H,GU Y R,et al.Construction of Hcp immunohistochemical library and antibody expression based on single memory B cell sequencing technology[J].J Army Med Univ,2025,47(15):1782-1791.DOI:10.16016/j.2097-0927.202312007. DOI:
目的
2
基于单个记忆B细胞测序技术制备针对鲍曼不动杆菌的人源化单克隆抗体,构建出Hcp蛋白的免疫组库,表达具有结合活性的单克隆抗体。
方法
2
构建带有pGEX-6p-1-Hcp重组质粒的BL21-Hcp菌液,采用蛋白质表达和蛋白质亲和层析技术获得目的蛋白Hcp;6~8周龄雌性SPF 级的BALB/c小鼠(体质量18~20 g),Hcp抗原肌肉注射免疫小鼠产生特异性记忆B细胞;采用流式细胞术分选单个特异性记忆B细胞;采用单细胞测序技术构建Hcp的免疫组库,并对测序结果进行生物信息学分析;采用抗体人源化改造技术获得单克隆抗体;采用ELISA实验检测抗体体外结合活性。
结果
2
表达并纯化出纯度大于95%的目的蛋白Hcp;成功构建了Hcp的免疫组库,分析得到了该免疫组库的BCR克隆型鉴定和分析结果、CDR3区域特征分析结果、V-J基因配对特征分析结果;人源化改造了7种单克隆抗体(IgG1-1、IgG1-2、IgG2-1、IgG2-2、IgG3-1、IgG4-1、IgG4-2);ELISA结果显示,IgG1-1、IgG3-1、IgG4-1、IgG4-2抗体结合效价均为1∶1 280,IgG2-2的抗体效价为1∶10 240,IgG2-1的抗体效价为1∶5 120,IgG1-2的抗体效价为1∶160。
结论
2
利用单细胞测序技术可以快速、准确、高效率地构建含有大量抗体信息的Hcp蛋白免疫组库,利用免疫组库可以表达具有结合活性的单克隆抗体。
Objective To prepare humanized monoclonal antibodies (Mabs) targeting
Acinetobacter baumannii
(Ab) based on single memory B cell sequencing technology
construct the immune repertoire of the core protein of Ab
hemolysin-coregulated protein (Hcp)
and express its Mabs with binding activity. Methods
E. coli
BL21 harboring the recombinant plasmid pGEX-6p-1-Hcp was constructed. Hcp protein was obtained using protein expression and affinity chromatography. Female SPF BALB/c mice (6~8 weeks old
weighing 18~20 g) were immunized intramuscularly with antigen Hcp to generate specific memory B cells. Single antigen-specific memory B cells were sorted using flow cytometry. The immune repertoire of Hcp was constructed using single-cell sequencing technology
and bioinformatics analysis was performed on the sequencing results. Mabs were obtained using antibody humanization techniques. The
in vitro
binding activity of the antibodies was detected by ELISA. Results The target protein Hcp with a purity
>
95% was obtained after expression and purification. The immune repertoire of Hcp was successfully constructed
and the results of BCR clonotype identification and analysis
CDR3 region characteristic analysis
and V-J gene pairing characteristic analysis were achieved. Antibody humanization got 7 Mabs
that is
IgG1-1
IgG1-2
IgG2-1
IgG2-2
IgG3-1
IgG4-1 and IgG4-2. ELISA re
sults showed IgG1-1
IgG3-1
IgG4-1
and IgG4-2 had an antibody binding titer of 1∶1 280
IgG2-2 of 1∶10 240
IgG2-1 of 1∶5 120
and IgG1-2 of 1∶160. Conclusion Single-cell sequencing technology enables rapid
accurate
and efficient construction of an Hcp protein immune repertoire containing extensive antibody information. Utilizing this immune repertoire allows for the expression of Mabs with binding activity.
程浩 , 杨赟 , 孙红武 , 等 . TLR2/TLR9激动剂对鲍曼不动杆菌肺部感染的保护作用 [J]. 陆军军医大学学报 , 2024 , 46 ( 8 ): 829 - 836 . DOI: 10.16016/j.2097-0927. 202401052 http://dx.doi.org/10.16016/j.2097-0927.202401052 .
CHENG H , YANG Y , SUN H W , et al . Protective effect of TLR2/TLR9 agonists on pulmonary Acinetobacter baumannii infection in mice [J]. J Army Med Univer , 2024 , 46 ( 8 ): 829 - 836 . DOI: 10.16016/j.2097-0927. 202401052 http://dx.doi.org/10.16016/j.2097-0927.202401052 .
胡音音 , 杜伟鹏 , 张亚东 , 等 . 鲍曼不动杆菌Hcp基因原核表达载体的构建及蛋白纯化 [J]. 实验与检验医学 , 2022 , 40 ( 2 ): 192 - 195 . DOI: 10.3969/j.issn.1674-1129.2022.02.015 http://dx.doi.org/10.3969/j.issn.1674-1129.2022.02.015 .
HU Y Y , DU W P , ZHANG Y D , et al . Construction of prokaryotic expression vector of Hcp gene of Acinetobacter baumannii and its protein purification [J]. Exp Lab Med , 2022 , 40 ( 2 ): 192 - 195 . DOI: 10.3969/j.issn.1674-1129.2022.02.015 http://dx.doi.org/10.3969/j.issn.1674-1129.2022.02.015 .
殷冠坤 , 靳龙阳 , 王辉 . 肺炎克雷伯菌和鲍曼不动杆菌Ⅵ型分泌系统研究进展 [J]. 中华微生物学和免疫学杂志 , 2021 , 41 ( 8 ): 640 - 644 . DOI: 10.3760/cma.j.cn112309-20201119-00527 http://dx.doi.org/10.3760/cma.j.cn112309-20201119-00527 .
YIN G K , JIN L Y , WANG H . Advances in \n Klebsiella pneumoniae and \n Acinetobacter baumannii type Ⅵ secretion systems\n [J]. Chin J Microbiol Immunol , 2021 , 41 ( 8 ): 640 - 644 . DOI: 10.3760/cma.j.cn112309-20201119-00527 http://dx.doi.org/10.3760/cma.j.cn112309-20201119-00527 .
程彤彤 , 万海同 , 余道军 . 鲍曼不动杆菌Ⅵ型分泌系统溶血素-联合调节蛋白研究进展 [J] 微生物学通报 , 2021 , 48 ( 3 ): 873 - 881 . DOI: 10.13344/j.microbiol.china.200384 http://dx.doi.org/10.13344/j.microbiol.china.200384 .
CHENG T T , WAN H T , YU D J . Role of haemolysin-coregulated protein in Acinetobacter baumannii type Ⅵ secretion system: a review [J]. Microbiol China , 2021 , 48 ( 3 ): 873 - 881 . DOI: 10.13344/j.microbiol.china.200384 http://dx.doi.org/10.13344/j.microbiol.china.200384 .
宋金益 , 胡海洋 . 单细胞转录组测序技术进展及其在生物医药领域的应用革新 [J]. 科技与创新 , 2022 ( 16 ): 173 - 177 . DOI: 10.15913/j.cnki.kjycx.2022.16.054 http://dx.doi.org/10.15913/j.cnki.kjycx.2022.16.054 .
SONG J Y , HU H Y . Progress of single cell transcriptome sequencing technology and its application innovation in biomedical field [J]. Sci Technol Innov , 2022 ( 16 ): 173 - 177 . DOI: 10.15913/j.cnki.kjycx.2022.16.054 http://dx.doi.org/10.15913/j.cnki.kjycx.2022.16.054 .
VISTAIN L , VAN PHAN H , KEISHAM B , et al . Quantification of extracellular proteins, protein complexes and mRNAs in single cells by proximity sequencing [J]. Nat Methods , 2022 , 19 ( 12 ): 1578 - 1589 . DOI: 10.1038/s41592-022-01684-z http://dx.doi.org/10.1038/s41592-022-01684-z .
GEISBRECHT B V , BOUYAIN S , POP M . An optimized system for expression and purification of secreted bacterial proteins [J]. Protein expression and purification , 2006 , 46 ( 1 ): 23 - 32 . DOI: 10.1016/j.pep.2005.09.003 http://dx.doi.org/10.1016/j.pep.2005.09.003 .
FITZSIMONS T C . Identification of Acinetobacter baumannii type Ⅵ secretion system targets and toxins [D]. Melbourne , Monash University , 2017 . https://doi.org/10.4225/03/5959b0429e1a8 https://doi.org/10.4225/03/5959b0429e1a8 .
CHAN E Y . Advances in sequencing technology [J]. Mutat Res Fundam Mol Mech Mutagen , 2005 , 573 ( 1/2 ): 13 - 40 . DOI: 10.1016/j.mrfmmm.2005.01.004 http://dx.doi.org/10.1016/j.mrfmmm.2005.01.004 .
MORA T , WALCZAK A M . How many different clonotypes do immune repertoires contain? [J]. Curr Opin Syst Biol , 2019 , 18 : 104 - 110 . DOI: 10.1016/j.coisb.2019.10.001 http://dx.doi.org/10.1016/j.coisb.2019.10.001 .
BONVIN P , VENET S , KOSCO-VILBOIS M , et al . Purpose-oriented antibody libraries incorporating tailored CDR3 sequences [J]. Antibodies , 2015 , 4 ( 2 ): 103 - 122 . DOI: 10.3390/antib4020103 http://dx.doi.org/10.3390/antib4020103 .
SINGH S , KUMAR N K , DWIWEDI P , et al . Monoclonal antibodies: a review [J]. Curr Clin Pharmacol , 2018 , 13 ( 2 ): 85 - 99 . DOI: 10.2174/1574884712666170809124728 http://dx.doi.org/10.2174/1574884712666170809124728 .
LI F , LUO M , ZHOU W Y , et al . Single cell RNA and immune repertoire profiling of COVID-19 patients reveal novel neutralizing antibody [J]. Protein Cell , 2021 , 12 ( 10 ): 751 - 755 . DOI: 10.1007/s13238-020-00807-6 http://dx.doi.org/10.1007/s13238-020-00807-6 .
SHIAKOLAS A R , KRAMER K J , JOHNSON N V , et al . Efficient discovery of SARS-CoV-2-neutralizing antibodies via B cell receptor sequencing and ligand blocking [J]. Nat Biotechnol , 2022 , 40 ( 8 ): 1270 - 1275 . DOI: 10.1038/s41587-022-01232-2 http://dx.doi.org/10.1038/s41587-022-01232-2 .
GÉRARD A , WOOLFE A , MOTTET G , et al . Author Correction: High-throughput single-cell activity-based screening and sequencing of antibodies using droplet microfluidics [J]. Nat Biotechnol , 2020 , 38 ( 6 ): 756 . DOI: 10.1038/s41587-020-0563-7 http://dx.doi.org/10.1038/s41587-020-0563-7 .
0
浏览量
0
下载量
0
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621