Anti-digoxin scFv fragments expressed in bacteria and in insect cells have different antigen binding properties

作者：Lemeulle C; Chardes T^*; Montavon C; Chaabihi H; Mani JC; Pugniere M; Cerutti M; Devauchelle G; Pau B; Biard Piechaczyk M

来源：FEBS LETTERS, 1998, 423(2): 159-166.

DOI：10.1016/S0014-5793(98)00029-5

• single-chain variable fragment
• digoxin
• affinity
• specificity
• baculovirus
• Escherichia coli
• protein expression
• SPR analysis

A gene encoding a single-chain antibody fragment directed against digoxin (named 1C10 scFv) was cloned in two expression systems, For this purpose, a new baculovirus transfer cassette fully compatible with the procaryotic pHEN vector was constructed, Baculovirus production led to higher yield than did Escherichia coli expression. The procaryotic fragment showed variations in the fine specificity profile but an affinity constant nearly identical to that of the 1C10 F-ab, whereas the eucaryotic scFv fragment had a lower affinity with a specificity profile identical to original mAb, The half-lives of the digoxin:scFv complexes and the global specificity are compatible with therapeutic use of this antibody fragment.

• 出版日期1998-2-20