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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Sci+Rep
2017 ; 7
(1
): 8360
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Efficient generation of bispecific IgG antibodies by split intein mediated
protein trans-splicing system
#MMPMID28827777
Han L
; Chen J
; Ding K
; Zong H
; Xie Y
; Jiang H
; Zhang B
; Lu H
; Yin W
; Gilly J
; Zhu J
Sci Rep
2017[Aug]; 7
(1
): 8360
PMID28827777
show ga
Many methods have been developed to produce bispecific antibodies (BsAbs) for
industrial application. However, huge challenges still remain in synthesizing
whole length BsAbs, including their assembly, stability, immunogenicity, and
pharmacodynamics. Here we present for first time a generic technology platform of
generating bispecific IgG antibodies, "Bispecific Antibody by Protein
Trans-splicing (BAPTS)". Different from published methods, we assembled two
parental antibody fragments in the hinge region by the protein trans-splicing
reaction of a split intein to generate BsAbs without heavy/heavy and light/heavy
chain mispairing. Utilizing this simple and efficient approach, there have been
several BsAbs (CD3×HER2, CD3×EGFR, EGFR×HER2) synthesized to demonstrate its
broad applicability. Correctly paired mAb arms were assembled to form BsAbs that
were purified through protein A affinity chromatography to demonstrate industrial
applicability at large scale. Further, the products were characterized through
physical-biochemistry properties and biological activities to confirm expected
quality of the products from "BAPTS". More importantly, correct pairing was
confirmed by mass spectrum. Proof-of-concept studies with CD3×HER2 BsAb (T-cell
recruitment) demonstrated superior bioactivity compared with trastuzumab. The
results of undetectable mispairing and high biological activity have indicated
that this method has the potential to be utilized to manufacture BsAbs with high
efficiency at industrial scale.