类风湿性关节炎 (RA) 是一种破坏性自身免疫性疾病,其中一氧化氮 (NO) 与 RA 的炎症过程密切相关。因此,直接观察NO对于评估RA的病理变化至关重要。本文合成了一种基于分子内电荷转移效应的线粒体靶向近红外比率荧光探针(NFL-NH 2 ),并应用于监测早期RA中NO含量的变化。特别地,探针NFL-NH 2对NO表现出44倍的荧光强度比( I 705 / I 780 )响应,检测限为0.536 nM,能够对NO进行定性和定量分析。此外,NFL-NH 2可以准确地靶向线粒体并灵敏地检测 RAW 264.7 细胞中的外源性和内源性 NO。值得注意的是,体内RA监测分析表明,NFL-NH 2可以通过比例荧光成像快速检测与RA小鼠模型中炎症损伤程度相关的NO水平。这些结果证实 NFL-NH 2在诊断 NO 介导的 RA 疾病方面具有巨大潜力。
Design and synthesis of a ratiometric photoacoustic imaging probe activated by selenol for visual monitoring of pathological progression of autoimmune hepatitis
Photoacoustic (PA) imaging with both the high contrast of optical imaging and the high spatial resolution of ultrasound imaging has been regarded as a robust biomedical imaging technique. Autoimmune hepatitis (AIH) is the second largest liver inflammatory disease after viral hepatitis, but its pathogenesis is not fully understood probably due to the lack of an effective in vivo monitoring approach. In this
光声(PA)成像兼具光学成像的高对比度和超声成像的高空间分辨率,被认为是一种强大的生物医学成像技术。自身免疫性肝炎(AIH)是继病毒性肝炎之后的第二大肝脏炎症性疾病,但其发病机制尚未完全了解,可能是由于缺乏有效的体内监测方法。在这项工作中,开发了一种创新的硒醇激活比率 PA 成像探针 APSel,用于视觉监测 AIH 的病理进展。包括硒代半胱氨酸(Sec,体内含硒物质的主要形式)在内的硒醇已被证明在炎症中具有有效的抗氧化作用。APSel 与硒醇的反应导致 PA 光谱峰从 860 nm 蓝移至 690 nm,从而实现比率 PA 成像。APSel 探针对 Sec 和其他硒醇表现出高灵敏度和选择性。然后使用 APSel 探针对细胞中的硒醇进行比率 PA 成像,并通过跟踪硒醇水平的变化来监测小鼠模型中 AIH 的发展。结果表明,硒醇水平与AIH的发生密切相关。所提出的 APSel 作为硒醇响应 PA
A near-infrared fluorescent probe for monitoring viscosity in living cells, zebrafish and mice
作者:Jingting Zhan、Chen Geng、Xinya Hao、Wenhui Song、Weiying Lin
DOI:10.1039/d0nj05957a
日期:——
A novel NIF fluorescent probe, ZM-V, was designed, in which interior imidazole and benzopyrene moieties serve as rotators, which can spin around multiple C–C bonds in the conjugated skeleton. The fluorescence intensity of ZM-V changed 111-fold from water to glycerol, displaying significant red-fluorescence enhancement with an emission at 666 nm. Furthermore, ZM-V exhibited a large Stokes shift of 166
Cyanine dyes having optional sulfonic acid substituents on the aromatic nucleus have been developed for use as contrast agents for assisting in surgery and diagnosis, especially for simplifying the surgical removal of basal membranes of the eye, such as the internal limiting membrane (ILM), and for dyeing the lens capsule.
4,4-disubstituted cyclohexyl bridged heptamethine cyanine dyes and uses thereof
申请人:VisEn Medical, Inc.
公开号:US11193932B2
公开(公告)日:2021-12-07
The invention relates to a family of compounds that comprise fluorescent cyanine dyes. The compounds are near infrared absorbing heptamethine cyanine dyes with a 4,4-disubstituted cyclohexyl ring as part of the polymethine chromophore. The compounds are generally hydrophilic and can be chemically linked to biomolecules, such as proteins, nucleic acids, and therapeutic small molecules. The compounds can be used for imaging in a variety of medical, biological and diagnostic applications.