mRNA display antibody library and methods

    公开(公告)号:US11034951B2

    公开(公告)日:2021-06-15

    申请号:US16264304

    申请日:2019-01-31

    申请人: NantBio, Inc.

    摘要: Compositions, methods and uses of a recombinant virus and/or recombinant viral vector encoding a distinct antibody or antibody fragment generated from high-diversity nucleic acid library are presented. Preferably, the recombinant virus is genetically modified, low immunogenic virus, for example, an E2b-deleted adenovirus. The high-diversity nucleic acid library comprises or is derived from (1) a VH-CDR1/2 sub-library, (2) a plurality of VH-CDR3 sub-libraries, and (3) a VL sub-library, each of which comprises a plurality of members. Preferably, each member of the sub-libraries comprises at least one random cassette that has a plurality of degenerate base positions. In an especially preferred embodiment, at least portions of at least two members of the VH-CDR1/2 sub-library, the plurality of VH-CDR3 sub-libraries, and the VL sub-library are recombined to form an expression library member in an expression library, where each member of the expression library encodes a distinct antibody or antibody fragment.

    Modified N-810 and Methods Therefor

    公开(公告)号:US20210061871A1

    公开(公告)日:2021-03-04

    申请号:US17006184

    申请日:2020-08-28

    申请人: NantBio, Inc.

    摘要: Compositions and methods for multi-specific protein complexes comprising an interleukin-15 (IL-15) domain comprising an N72D mutation (IL-15N72D), a IL-15 receptor alpha sushi-binding domain (IL-15RαSu), an immunoglobulin Fc domain, and a mutated transforming growth factor-beta receptor type 2 (TGFβRII) domain, wherein the mutated TGFβRII domain has a N->Q mutation in positions 47, 71, and 131 respectively. The IL-15RαSu domain, the Fc domain, and the mutated TGFβRII domain are sequentially linked by amide bonds. Preferably, contemplated complexes further include a binding domain that specifically binds to a disease antigen, immune checkpoint molecule, or immune signaling molecule.

    TNF-TYPE RECEPTOR-LIGAND FUSION PROTEINS AND METHODS

    公开(公告)号:US20200024326A1

    公开(公告)日:2020-01-23

    申请号:US16440790

    申请日:2019-06-13

    申请人: NANTBIO, INC.

    摘要: Self-activating chimeric signaling proteins, and especially chimeric TNF family member ligand-receptor proteins are contemplated. In preferred methods, the chimeric protein comprises an extracellular portion of CD40L that is coupled via a flexible linker to CD40 such that the fusion protein, when expressed in an APC, is capable of folding back on itself and transmits a CD40-mediated signal as if it had been contacted by CD40L located on another cell. Advantageously, cells expressing such chimeric proteins contemporaneously with presentation of an antigen will enhance an immune reaction against the antigen.