Achieving Near‐Infrared Organic Room‐Temperature Phosphorescence for High‐Resolution Immune Response Monitoring and Bioimaging

IF 16.9 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Yeyun Zhao, Xianbin Ma, Shisheng Cui, Jiamin Qu, Yuqi Wen, Kai Zhang, Gengchen Li, Yongfeng Zhang, Xiaoyuan Huang, Baicheng Mei, Tao Wang, Peng Sun, Jianbing Shi, Bin Tong, Hai‐Yan Xie, Zitong Liu, Zhengxu Cai, Yuping Dong
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引用次数: 0

Abstract

Organic near‐infrared (NIR) room‐temperature phosphorescent (RTP) materials hold great potential for bioimaging due to their ability to eliminate background noise and tissue autofluorescence. Here, we synthesized octa‐ring fused RTP molecules (TPP‐BN and TPP‐BF) with B─N coordination bonds via a two‐step reaction, enabling NIR phosphorescent emission at 819 nm and a 28.6 ms lifetime. Using PMMA‐b‐PEG as host and surfactant to stabilize the RTP molecules, we fabricated PMMA‐b‐PEG based nanoparticles (PNPs) with five‐fold brighter afterglow than conventional F127‐based methods (FNPs). We further developed a granzyme B (GrB)‐responsive nanoprobe (Q‐BFNP) that achieves specific and quantitative detection. In vivo studies demonstrated their ability to monitor and distinguish tumor immune response with the signal‐to‐background ratio (SBR) as high as 216.4. This study provides a new method for constructing NIR organic RTP probes and advances applications of RTP materials in real‐time, high‐contrast bioimaging and tumor immune monitoring.
实现近红外室温有机磷光,用于高分辨率免疫反应监测和生物成像
有机近红外(NIR)室温磷光(RTP)材料由于其消除背景噪声和组织自身荧光的能力,在生物成像方面具有巨大的潜力。在这里,我们通过两步反应合成了具有B─N配位键的八环熔融RTP分子(TPP‐BN和TPP‐BF),实现了819 nm的近红外磷光发射和28.6 ms的寿命。利用PMMA - b - PEG作为宿主和表面活性剂来稳定RTP分子,我们制备了基于PMMA - b - PEG的纳米颗粒(PNPs),其余辉比传统的基于F127的方法(FNPs)亮5倍。我们进一步开发了一种颗粒酶B (GrB)响应纳米探针(Q‐BFNP),实现了特异性和定量检测。体内研究表明,它们具有监测和区分肿瘤免疫反应的能力,其信号背景比(SBR)高达216.4。该研究为构建近红外有机RTP探针提供了新的方法,并推动了RTP材料在实时、高对比度生物成像和肿瘤免疫监测中的应用。
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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
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