Generation and characterization of monospecific and bispecific hexavalent trimerbodies.

Generation and characterization of monospecific and bispecific hexavalent trimerbodies.
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DOI:
10.4161/mabs.22698
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发表时间:
2013-01
期刊:
影响因子:
5.3
通讯作者:
Álvarez-Vallina L
Álvarez-Vallina L
中科院分区:
医学2区
文献类型:
--
作者:
Blanco-Toribio A;Sainz-Pastor N;Álvarez-Cienfuegos A;Merino N;Cuesta ÁM;Sánchez-Martín D;Bonet J;Santos-Valle P;Sanz L;Oliva B;Blanco FJ;Álvarez-Vallina L

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Here, we describe a new class of multivalent and multispecific antibody-based reagents for therapy. The molecules, termed “trimerbodies,” use a modified version of the N-terminal trimerization region of human collagen XVIII noncollagenous 1 domain flanked by two flexible linkers as trimerizing scaffold. By fusing single-chain variable fragments (scFv) with the same or different specificity to both N- and C-terminus of the trimerizing scaffold domain, we produced monospecific or bispecific hexavalent molecules that were efficiently secreted as soluble proteins by transfected mammalian cells. A bispecific anti-laminin x anti-CD3 N-/C-trimerbody was found to be trimeric in solution, very efficient at recognizing purified plastic-immobilized laminin and CD3 expressed at the surface of T cells, and remarkably stable in human serum. The bispecificity was further demonstrated in T cell activation studies. In the presence of laminin-rich substrate, the bispecific anti-laminin x anti-CD3 N-/C-trimerbody stimulated a high percentage of human T cells to express surface activation markers. These results suggest that the trimerbody platform offers promising opportunities for the development of the next-generation therapeutic antibodies, i.e., multivalent and bispecific molecules with a format optimized for the desired pharmacokinetics and adapted to the pathological context.
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