Volume 63, Issue 40 e202410645
Research Article

Development of a Dual-Factor Activatable Covalent Targeted Photoacoustic Imaging Probe for Tumor Imaging

Dr. Jiho Song

Dr. Jiho Song

Department of Pharmacology and Chemical Biology, Emory University, Atlanta, Georgia, 30322 United States

These authors contributed equally to this work.

Search for more papers by this author
Tianqu Zhai

Tianqu Zhai

Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109 USA

These authors contributed equally to this work.

Search for more papers by this author
Dr. Heung Sik Hahm

Dr. Heung Sik Hahm

Department of Pharmacology and Chemical Biology, Emory University, Atlanta, Georgia, 30322 United States

Search for more papers by this author
Dr. Yuancheng Li

Dr. Yuancheng Li

Department of Radiology and Imaging Science, Emory University, Atlanta, Georgia, 30322 United States

Search for more papers by this author
Prof. Dr. Hui Mao

Prof. Dr. Hui Mao

Department of Radiology and Imaging Science, Emory University, Atlanta, Georgia, 30322 United States

Search for more papers by this author
Prof. Dr. Xueding Wang

Prof. Dr. Xueding Wang

Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109 USA

Search for more papers by this author
Dr. Janggun Jo

Corresponding Author

Dr. Janggun Jo

Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109 USA

Search for more papers by this author
Prof. Dr. Jae Won Chang

Corresponding Author

Prof. Dr. Jae Won Chang

Department of Pharmacology and Chemical Biology, Emory University, Atlanta, Georgia, 30322 United States

Department of Hematology and Medical Oncology, Emory University, Atlanta, Georgia, 30322 United States

Winship Cancer Institute, Emory University, Atlanta, Georgia, 30322 United States

Search for more papers by this author
First published: 27 June 2024

Graphical Abstract

We developed an NCEH1-targeted covalent photoacoustic imaging probe activated under hypoxia. This probe potently and selectively labels NCEH1, an aggressive tumor associated serine hydrolase, in cells and is also activated under hypoxic conditions. Through covalent labeling and hypoxia activation, this probe offers selective and high-quality in vivo tumor imaging of aggressive prostate cancer.

Abstract

Photoacoustic imaging (PAI) is an emerging modality in biomedical imaging with superior imaging depth and specificity. However, PAI still has significant limitations, such as the background noise from endogenous chromophores. To overcome these limitations, we developed a covalent activity-based PAI probe, NOx-JS013, targeting NCEH1. NCEH1, a highly expressed and activated serine hydrolase in aggressive cancers, has the potential to be employed for the diagnosis of cancers. We show that NOx-JS013 labels active NCEH1 in live cells with high selectivity relative to other serine hydrolases. NOx-JS013 also presents its efficacy as a hypoxia-responsive imaging probe in live cells. Finally, NOx-JS013 successfully visualizes aggressive prostate cancer tumors in mouse models of PC3, while being negligibly detected in tumors of non-aggressive LNCaP mouse models. These findings show that NOx-JS013 has the potential to be used to develop precision PAI reagents for detecting metastatic progression in various cancers.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.