Selective labeling and monitoring pH changes of lysosomes in living cells with fluorogenic pH sensors
摘要:
New BODIPY-based pH probes have been designed with excitation and emission wavelengths suitable for fluorescence microscopy and flow cytometry. These pH probes are cell-permeable, selectively label lysosomes, and can be used for noninvasive monitoring of lysosomal pH changes during physiological and pathological processes. (C) 2011 Elsevier Ltd. All rights reserved.
developing fluorescent probes and biosensors. Quantitative prediction of the quantum yields of these probes and sensors is crucial to accelerate the rational development of novel PET-based functional materials. Herein, we developed a general descriptor (ΔE) for predicting the quantum yield of PET probes, with a threshold value of ~0.6 eV. When ΔE < ~0.6 eV, the quantum yield is low (mostly <2%) due
光诱导电子转移 (PET) 是开发荧光探针和生物传感器的最重要机制之一。对这些探针和传感器的量子产率进行定量预测对于加速新型基于 PET 的功能材料的合理开发至关重要。在此,我们开发了一个通用描述符 (ΔE) 来预测 PET 探针的量子产率,阈值为 ~0.6 eV。当 ΔE < ~0.6 eV 时,由于 PET 在极性环境中的大量活化,量子产率较低(大多 <2%);当 ΔE > ~0.6 eV 时,由于 PET 的抑制,量子产率很高。这种简单而有效的描述符适用于广泛的荧光团,例如 BODIPY、荧光素、罗丹明和 Si-罗丹明。
Highly efficient near-infrared BODIPY phototherapeutic nanoparticles for cancer treatment
A highly efficient NIR BODIPY nano-photosensitizer constructed by multi-intersection effects provides beneficial guidance for photodynamic and photothermal therapy.
通过多交叉效应构建的高效近红外 BODIPY 纳米光敏剂为光动力和光热疗法提供了有益的指导。
Synthesis and Evaluation of [<sup>18</sup>
F]-Ammonium BODIPY Dyes as Potential Positron Emission Tomography Agents for Myocardial Perfusion Imaging
作者:Kantapat Chansaenpak、Hui Wang、Mengzhe Wang、Benjamin Giglio、Xiaofeng Ma、Hong Yuan、Shuo Hu、Zhanhong Wu、Zibo Li
DOI:10.1002/chem.201601972
日期:2016.8.16
Recently, we demonstrated the potential of a [18F]‐trimethylammonium BODIPY dye for cardiac imaging. This is the first example of the use of the [18F]‐ammonium BODIPY dye for positron emission tomography (PET) myocardialperfusionimaging (MPI). In this report, we extend our study to other ammonium BODIPY dyes with different nitrogen substituents. These novel ammonium BODIPY dyes were successfully
A pH-responsive organic photosensitizer specifically activated by cancer lysosomes
作者:Fengfeng Xue、Peng Wei、Xiaoting Ge、Yaping Zhong、Chunyan Cao、Danping Yu、Tao Yi
DOI:10.1016/j.dyepig.2018.04.008
日期:2018.9
Photodynamic therapy that can cause high toxicity in cancer cells and lower toxicity in normal cells is in great demand. Herein, we report a pH-responsive photosensitizer based on BODIPY (pH-PDT) by specific response to lysosomes of cancer cells for efficient photo dynamic therapy. The photosensitizer is highly sensitive in the pH range of 5.5-3.0, exhibiting an increased emission at 555 nm for about 12-fold. In vitro experiments confirmed that the singlet oxygen quantum yield of the photosensitizer was increased from 0.24 to 0.45 in an acidic environment (pH 5.5 to 3.5). With different pH of lysosomes in cancer cells and normal cells, the pH-PDT can specifically respond to lysosomes of cancer cell (HePG-2 cell) for photodynamic therapy of cancer and have no obvious toxicity of normal cells (HL-7702 cells).