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Title: Activatable polymeric nanoprobe for near-infrared fluorescence and photoacoustic imaging of T lymphocytes
Authors: Zhang, Yan
He, Shasha
Chen, Wan
Liu, Yinghua
Zhang, Xuefei
Miao, Qingqing
Pu, Kanyi
Keywords: Engineering::Chemical engineering
Issue Date: 2021
Source: Zhang, Y., He, S., Chen, W., Liu, Y., Zhang, X., Miao, Q. & Pu, K. (2021). Activatable polymeric nanoprobe for near-infrared fluorescence and photoacoustic imaging of T lymphocytes. Angewandte Chemie International Edition, 60(11), 5921-5927.
Project: M4081627
Journal: Angewandte Chemie International Edition 
Abstract: Development of real-time non-invasive imaging probes to assess infiltration and activation of cytotoxic T cells (CTLs) is critical to predict the efficacy of cancer immunotherapy, which however remains challenging. Reported here is an activatable semiconducting polymer nanoprobe (SPNP) for near-infrared fluorescence (NIRF) and photoacoustic (PA) imaging of a biomarker (granzyme B) associated with activation of CTLs. SPNP comprises a semiconducting polymer (SP) conjugated with a granzyme B cleavable and dye-labeled peptide as the side chain, both of which emit NIRF and PA signals. After systemic administration, SPNP passively targets the tumor and in situ reacts with granzyme B to release the dye-labeled peptide, leading to decreased NIRF and PA signals from the dye but unchanged signals from the polymer. Such ratiometric NIRF and PA signals of SPNP correlate well with the expression level of granzyme B and intratumoral population of CTLs. Thus, this study not only presents the first PA probes for in vivo imaging of immune activation but also provides a molecular design strategy that can be generalized for molecular imaging of other immune-related biomarkers.
ISSN: 1433-7851
DOI: 10.1002/anie.202015116
Rights: © 2020 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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