Site-specific antibody fragment conjugates for targeted imaging

Robert Maloney, Zakey Yusuf Buuh, Yue Zhao, Rongsheng E. Wang

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

5 Scopus citations

Abstract

This work details the use of amber suppression-mediated genetic incorporation of unnatural amino acids (UAAs), specifically p-azido-L-phenylalanine (pAzF) and p-acetyl-L-phenylalanine (pAcF), to develop site-specifically labeled antibody Fab fragments. These antibody fragment conjugates represent a novel class of imaging agents with optimal stability, efficacy, and pharmacological properties, which have demonstrated promising potential for probing and understanding the in vivo bio-distributions of protein targets of interest. This chapter provides general guidelines for preparing these Fab conjugates, and details of follow-up bioassays such as single-agent based positron emission tomography (PET) imaging of immune-checkpoint protein PD-L1, and the use of GCN4-mediated switchable antibody conjugates for near-infrared fluorescent imaging of cancer-related biomarkers.

Original languageEnglish
Title of host publicationChemical Tools for Imaging, Manipulating, and Tracking Biological Systems
Subtitle of host publicationDiverse Methods for Prokaryotic and Eukaryotic Systems
EditorsDavid M. Chenoweth
PublisherAcademic Press Inc.
Pages295-320
Number of pages26
Volume638
ISBN (Print)9780128201459
DOIs
StatePublished - 2020

Publication series

NameMethods in enzymology
ISSN (Print)0076-6879

Keywords

  • Amino Acids
  • Antibodies
  • Immunoglobulin Fab Fragments
  • Positron-Emission Tomography

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