Bi/tri-specific antibodies (HN-Fc-CD16 and HN-Fc-IL-15-CD16) cross-linking natural killer (NK)-CD16 and Newcastle Disease Virus (NDV)-HN, enhanced NK activation for cancer immunotherapy

Int Immunopharmacol. 2021 Jul:96:107762. doi: 10.1016/j.intimp.2021.107762. Epub 2021 May 31.

Abstract

Cancer/tumor cells infected with the "avian paramyxovirus Newcastle Disease Virus (TC-NDV)" express the viral hemagglutinin-neuraminidase (HN) on the cell surface that is used as both the danger signal and anchor for bi/tri-specific antibodies (bs/tsAbs).We constructed a bs-Ab (HN-Fc-CD16) that bindsto HN and natural killer (NK)-CD16 receptor (FcgRIII)and a ts-Ab (HN-Fc-IL15-CD16) harbouring NK-activating cytokine "IL-15" within the bs-Ab.In silicoand computational predictions indicated proper exposure of both Abs in bs/tsAbs.Properbinding of thebi/tsAbstoHN on surface of TC-NDVandCD16+-cells was demonstrated by flow cytometry.The bi/tsAbstriggeredspecificcytotoxicity of NK cells againstTC-NDVand elicited substantial IFN-γproduction by activated NK cells(higher for ts-Ab) that sound promising for cancer immunotherapy purposes.

Keywords: Bispecific antibody; Immunotherapy; Mammalian expression system; Natural Killer cell (NK cell); Newcastle Disease Virus (NDV); Trispecific antibody.

MeSH terms

  • Antibodies, Bispecific / biosynthesis*
  • Antibodies, Bispecific / chemistry
  • Antibodies, Bispecific / immunology
  • Antibodies, Bispecific / pharmacology*
  • Antineoplastic Agents, Immunological / chemistry
  • Antineoplastic Agents, Immunological / immunology
  • Antineoplastic Agents, Immunological / pharmacology*
  • Binding Sites
  • Cytotoxicity Tests, Immunologic
  • HEK293 Cells
  • HN Protein / immunology*
  • HeLa Cells
  • Humans
  • Immunoglobulin Fc Fragments / immunology
  • Immunotherapy / methods
  • Interferon-gamma / metabolism
  • Killer Cells, Natural / immunology
  • Ligands
  • Models, Molecular
  • Neoplasms / immunology
  • Neoplasms / therapy*
  • Newcastle disease virus / immunology*
  • Receptors, IgG / immunology*

Substances

  • Antibodies, Bispecific
  • Antineoplastic Agents, Immunological
  • HN Protein
  • Immunoglobulin Fc Fragments
  • Ligands
  • Receptors, IgG
  • Interferon-gamma