title: Characterization of Anti-Citrinin Specific ScFvs Selected from Non-Immunized Mouse Splenocytes by Eukaryotic Ribosome Display.
abstract: Single chain variable fragments (scFvs) against citrinin (CIT) were selected from a scFv library constructed from the splenocytes of non-immunized mice by an improved eukaryotic ribosome display technology in this study. Bovine serum albumin (BSA)/ CIT-BSA and ovalbumin (OVA)/ CIT-OVA were used as the antigens to select specific anti-CIT scFvs. Eukaryotic in situ RT-PCR method was used to recover the selected mRNA after every affinity selection. After six rounds of ribosome display, expression vector pTIG-TRX carrying specific scFv DNAs were constructed and transformed into Escherichia coli BL21 (DE3) for protein expression. Thirteen positive clones were selected out of which three (designated 23, 68 and 109) showed high binding activity and specificity to CIT by indirect ELISA, while no clone showed binding activity with carrier proteins. The three scFvs showed high specificity to CIT and the cross reactivity with other mycotoxins was below 0.01% as determined by indirect competitive ELISA. These specific scFvs offer a potential novel immunoassay method for CIT residues. This study confirmed the effectiveness of the improved eukaryotic ribosome display system and could be used as a reference for the selection of scFvs specific to other small molecules using ribosome display.
authors.affiliation: Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Haiwei
authors.initials: H
authors.lastname: Cheng
authors.affiliation: Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Yifei
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Xueqiu
authors.initials: X
authors.lastname: Chen
authors.affiliation: Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Xiaolu
authors.initials: X
authors.lastname: Guo
authors.affiliation: Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou, China.
authors.forename: Aifang
authors.initials: A
authors.lastname: Du
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000908:Antibodies, Fungal / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D000915:Antibody Affinity; D000918:Antibody Specificity; D002953:Citrinin / Q000276:immunology*; D003001:Cloning, Molecular / Q000379:methods; D007118:Immunoassay / Q000379:methods; D051379:Mice; D008969:Molecular Sequence Data; D009183:Mycotoxins / Q000276:immunology; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D012270:Ribosomes / Q000378:metabolism; D057127:Single-Chain Antibodies / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D013154:Spleen / Q000166:cytology / Q000378:metabolism
chemical_list: D000908:Antibodies, Fungal; D009183:Mycotoxins; D012333:RNA, Messenger; D057127:Single-Chain Antibodies; D002953:Citrinin