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Human IgG Fc-engineering for enhanced plasma half-life, mucosal distribution and killing of cancer cells and bacteria

  • Stian Foss
  • , Siri A Sakya
  • , Leire Aguinagalde
  • , Marta Lustig
  • , Jutamas Shaughnessy
  • , Ana Rita Cruz
  • , Lisette Scheepmaker
  • , Line Mathiesen
  • , Fulgencio Ruso-Julve
  • , Aina Karen Anthi
  • , Torleif Tollefsrud Gjølberg
  • , Simone Mester
  • , Malin Bern
  • , Mitchell Evers
  • , Diane B Bratlie
  • , Terje E Michaelsen
  • , Tilman Schlothauer
  • , Devin Sok
  • , Jayanta Bhattacharya
  • , Jeanette Leusen
  • Thomas Valerius, Sanjay Ram, Suzan H M Rooijakkers, Inger Sandlie, Jan Terje Andersen*
*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Monoclonal IgG antibodies constitute the fastest growing class of therapeutics. Thus, there is an intense interest to design more potent antibody formats, where long plasma half-life is a commercially competitive differentiator affecting dosing, frequency of administration and thereby potentially patient compliance. Here, we report on an Fc-engineered variant with three amino acid substitutions Q311R/M428E/N434W (REW), that enhances plasma half-life and mucosal distribution, as well as allows for needle-free delivery across respiratory epithelial barriers in human FcRn transgenic mice. In addition, the Fc-engineered variant improves on-target complement-mediated killing of cancer cells as well as both gram-positive and gram-negative bacteria. Hence, this versatile Fc technology should be broadly applicable in antibody design aiming for long-acting prophylactic or therapeutic interventions.

Original languageEnglish
Article number2007
JournalNature Communications
Volume15
Issue number1
DOIs
Publication statusPublished - Dec 2024

Keywords

  • Animals
  • Anti-Bacterial Agents/therapeutic use
  • Antibodies, Monoclonal
  • Gram-Negative Bacteria/metabolism
  • Gram-Positive Bacteria/metabolism
  • Half-Life
  • Histocompatibility Antigens Class I/metabolism
  • Humans
  • Immunoglobulin G
  • Mice
  • Mice, Transgenic
  • Neoplasms/therapy
  • Receptors, Fc

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