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An activatable fluorescent probe enables in vivo evaluation of peroxynitrite levels in rheumatoid arthritis
Talanta ( IF 5.6 ) Pub Date : 2022-08-06 , DOI: 10.1016/j.talanta.2022.123811
Zhao Wang 1 , Jiankang Gong 2 , Pengzhan Wang 2 , Jianhua Xiong 3 , Fan Zhang 2 , Zhiqiang Mao 2
Affiliation  

An activatable probe able to detect RONS level underlying the development of rheumatoid arthritis (RA) would be far-reaching for the diagnosis and drug efficacy assessment of RA. Despite more and more evidence suggests that ONOO is an important signaling molecule participating in the RA disease, only rare fluorescent probes can detect ONOO in this disease with satisfying performance. To this end, we designed and synthesized a novel activatable AIE fluorescent probe (DPPO-PN) for the detection of ONOO levels in RA. The probe linearly responds to 0–10 μM ONOO with a significant far-red fluorescence enhancement at 632 nm in 30 s (F/F0 = 161-fold, LOD = 10 nM) upon the excitation of 490 nm, elucidating excellent sensing abilities for ONOO in cuvettes. Moreover, the fluctuations of intracellular ONOO levels caused by adscititious adding or stimulant provoking could be real-time captured and visualized with this probe by confocal imaging. Further, the intravital imaging of ONOO in LPS-induced and CFA-induced RA mouse models also can be achieved with the aid of the probe, substantiating the burst of ONOO in the RA process. Therefore, this work not only offers an auxiliary tool for the diagnosis of RA but also would benefit our understanding of the ONOO‘s roles in RA.

中文翻译:


可激活的荧光探针能够对类风湿性关节炎中的过氧亚硝酸盐水平进行体内评估



能够检测类风湿性关节炎 (RA) 发展的 RONS 水平的可激活探针将对 RA 的诊断和药效评估具有深远的影响。尽管越来越多的证据表明 ONOO− 是参与 RA 疾病的重要信号分子,但只有罕见的荧光探针才能以令人满意的性能检测该疾病中的 ONOO−。为此,我们设计并合成了一种新型可激活 AIE 荧光探针 (DPPO-PN),用于检测 RA 中的 ONOO− 水平。探针对 0–10 μM ONOO− 呈线性响应,在 490 nm 激发下,在 30 秒内在 632 nm 处出现显著的远红外荧光增强(F/F0 = 161 倍,LOD = 10 nM),阐明了比色皿中 ONOO− 的出色传感能力。此外,由添加剂添加或刺激剂激发引起的细胞内 ONOO− 水平波动可以通过该探针通过共聚焦成像实时捕获和可视化。此外,在探针的帮助下,也可以在 LPS 诱导和 CFA 诱导的 RA 小鼠模型中实现 ONOO− 的活体成像,证实了 RA 过程中 ONOO− 的爆发。因此,这项工作不仅为 RA 的诊断提供了辅助工具,而且有利于我们理解 ONOO− 在 RA 中的作用。
更新日期:2022-08-06
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