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Updated: Oct 27, 2025

Genetic and Biochemical Approaches for In Vivo and In Vitro Assessment of Protein Oligomerization: The Ryanodine Receptor Case Study
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Genetic and Biochemical Approaches for In Vivo and In Vitro Assessment of Protein Oligomerization: The Ryanodine Receptor Case Study

Published on: July 27, 2016

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Transthyretin-mediated protein and peptide oligomerization for enhanced target clustering

Daniel Yoo1, Kenneth W Walker1

  • 1Amgen Research, Amgen Inc., One Amgen Center Drive, Thousand Oaks, CA 91320, U.S.A.

Emerging Topics in Life Sciences
|July 20, 2021
PubMed

Insights

Researchers developed a novel drug delivery platform using transthyretin (TTR) to enhance anti-tumor immune responses. This TTR-based system effectively clusters targets, showing promise for new cancer therapies and infectious disease research.

Area of Science:

  • Oncology
  • Immunology
  • Biotechnology

Background:

  • Cancer therapies like immune checkpoint inhibitors have shown success.
  • Targeting tumor necrosis factor (TNF) receptors aims to boost anti-tumor immunity but requires receptor clustering.
  • Existing methods for receptor clustering can be complex and challenging.

Purpose of the Study:

  • To present transthyretin (TTR) as a drug delivery platform for cross-linking independent target clustering.
  • To demonstrate the versatility and stability of TTR for creating multimeric antibody fusions.
  • To evaluate the therapeutic potential of TTR-based fusions in cancer models.

Main Methods:

  • Utilized transthyretin (TTR), a stable serum protein tetramer, as a fusion platform.
  • Engineered antibody or Fab fusions targeting TRAILR2.
  • Assessed cytotoxic activity of TTR fusions in vitro and in vivo using colorectal xenograft models.

Main Results:

  • Transthyretin (TTR) demonstrated a versatile and stable platform for generating multimeric antibody fusions.
  • TTR-TfR2 antibody/Fab fusions exhibited robust cytotoxic activity against cancer cells.
  • Effective in vitro and in vivo anti-tumor activity was observed in colorectal cancer models.

Conclusions:

  • Transthyretin (TTR) is a highly versatile and stable therapeutic fusion platform.
  • TTR enables enhanced target clustering, crucial for TNF receptor-based therapies.
  • This platform has broad applications in oncology and infectious disease research.
Keywords:
antibodyclusteringprotein engineeringtetramertransthyretin

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