Issue 13, 2021

A short PEG linker alters the in vivo pharmacokinetics of trastuzumab to yield high-contrast immuno-PET images

Abstract

The prolonged blood circulation of the radiolabeled antibody conjugates is problematic when using immuno-PET imaging due to the increased radiation exposure and longer hospitalization required until sufficient contrast develops. In contrast to the prevailing belief that PEGylation prolongs blood retention time, we observed that a PEGylated antibody with a short PEG8 linker cleared much faster from the blood while maintaining tumor uptake compared to its non-PEGylated counterpart. Breast tumors were clearly visualized with a very high tumor-to-background ratio as early as 24 h after injection in immuno-positron emission tomography (PET) imaging.

Graphical abstract: A short PEG linker alters the in vivo pharmacokinetics of trastuzumab to yield high-contrast immuno-PET images

Associated articles

Supplementary files

Article information

Article type
Communication
Submitted
16 Dec 2020
Accepted
09 Feb 2021
First published
16 Mar 2021

J. Mater. Chem. B, 2021,9, 2993-2997

A short PEG linker alters the in vivo pharmacokinetics of trastuzumab to yield high-contrast immuno-PET images

W. Lee, K. N. Bobba, J. Y. Kim, H. Park, A. Bhise, W. Kim, K. Lee, S. Rajkumar, B. Nam, K. C. Lee, S. H. Lee, S. Ko, H. J. Lee, S. T. Jung and J. Yoo, J. Mater. Chem. B, 2021, 9, 2993 DOI: 10.1039/D0TB02911D

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