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10.1038/s41598-017-08641-3

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suck abstract from ncbi


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pmid28827777
      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.
  • |*Protein Splicing [MESH]
  • |*Trans-Splicing [MESH]
  • |Animals [MESH]
  • |Antibodies, Bispecific/*biosynthesis/isolation & purification/pharmacology [MESH]
  • |CD3 Complex/immunology [MESH]
  • |Cell Proliferation/*drug effects [MESH]
  • |ErbB Receptors/immunology [MESH]
  • |Female [MESH]
  • |Humans [MESH]
  • |Immunoglobulin G/*immunology [MESH]
  • |Mice [MESH]
  • |Mice, Inbred NOD [MESH]
  • |Mice, SCID [MESH]
  • |Protein Engineering/*methods [MESH]
  • |Receptor, ErbB-2/immunology [MESH]
  • |Stomach Neoplasms/drug therapy/immunology/*pathology [MESH]
  • |Tumor Cells, Cultured [MESH]


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