期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 5, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202114766
关键词
Cathepsin B; Nanoparticles; Photoacoustic imaging; Self-assembly
资金
- National Natural Science Foundation of China [21725505, 81821001, 22074016]
- Fundamental Research Funds for the Central Universities [WK2060000020]
CTSB is overexpressed in many types of cancer in the early stage, and the smart photoacoustic probe Cypate-CBT can achieve sensitive and specific detection of CTSB activity, showing intracellular accumulation after self-assembly initiated by CTSB. It is expected to be an effective PA imaging agent for early cancer diagnosis.
Cathepsin B (CTSB) is a lysosomal protease that is overexpressed in the early stage of many cancer types. Precise evaluation of CTSB expression in vivo may provide a promising method for the early diagnosis of cancers. By virtue of the high-resolution PA imaging modality, a smart photoacoustic (PA) probe Cypate-CBT, which can self-assemble to cypate-containing nanoparticles in response to abundant GSH and CTSB inside tumor cells, was developed for the sensitive and specific detection of CTSB activity. Compared with unmodified Cypate, our probe Cypate-CBT exhibited a 4.9-fold or 4.7-fold PA signal enhancement in CTSB-overexpressing MDA-MB-231 cancer cells or tumors, respectively, revealing intracellular accumulation of the probe after CTSB-initiated self-assembly. We expect Cypate-CBT to be employed as an effective PA imaging agent for clinical diagnosis of cancer at early stages.
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