Construction of phage display antibody library to MCF-7 cells and screening of single-chain antibodies against breast cancer cells / 生物工程学报
Chinese Journal of Biotechnology
;
(12): 667-672, 2004.
Article
in Chinese
| WPRIM
| ID: wpr-249957
ABSTRACT
The aim of this study is to construct a phage display single-chain variable fragment (scFv) library against breast cancer cells and screen the specific antibodies against MCF-7 cells from the library. The BALB/C mice were immunized with MCF-7 cells. Total RNA of spleens was isolated. The heavy-chain (VH) and light-chain variable region genes (VL) of the antibodies were amplified by RT-PCR and joined into a single chain by overlapping PCR with a linker DNA encoding the peptide (Gly4Ser)3. The assembled scFv fragments were cloned into the phagemids(pCANTAB5E) and the recombinant phagemids were used to transform competent E. coli TG1. The transformed TG1 cells were infected by helper phage M13KO7 and the recombinant phagemids were rescued. The scFv fusion proteins were displayed on the surfaces of the recombinant phages. A phage display antibody library of repertoire of 1.2 x 10(6) clones was constructed. The specific antibodies against MCF-7 cells were enriched by 75 times after five rounds of affinity selection. Ten recombinant phages clones that exhibited specific binding to MCF-7 cells were identified. The specificity of those phage clones was analyzed by reactivity against HepG2 cells and Hela cells by ELISA. One of the selected phage clones against MCF-7cells was used to infect E. coli TOP10 to produce the soluble scFv antibodies after induction with IPTG. The strategy of construction and screening of antibody library directed against the whole tumor cells described in this report should be generally applicable to generate tumor cell-specific antibodies.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Therapeutics
/
Breast Neoplasms
/
Immunoglobulin Variable Region
/
HeLa Cells
/
Immunoglobulin Heavy Chains
/
Immunoglobulin Light Chains
/
Peptide Library
/
Cell Line, Tumor
/
Allergy and Immunology
/
Hep G2 Cells
Type of study:
Diagnostic study
/
Prognostic study
/
Screening study
Limits:
Animals
/
Female
/
Humans
Language:
Chinese
Journal:
Chinese Journal of Biotechnology
Year:
2004
Type:
Article
Similar
MEDLINE
...
LILACS
LIS