Lim Chang Su, Cho Myoung Ki, Park Mi Yeon, Kim Hwan Myung
Department of Energy System Research and Department of Chemistry Ajou University Suwon Gyeonggi-do 443-749 Republic of Korea.
ChemistryOpen. 2017 Nov 22;7(1):53-56. doi: 10.1002/open.201700155. eCollection 2018 Jan.
Hydrogen peroxide (HO) is important in the regulation of a variety of biological processes and is involved in various diseases. Quantitative measurement of HO levels at the subcellular level is important for understanding its positive and negative effects on biological processes. Herein, a two-photon ratiometric fluorescent probe (SHP-Cyto) with a boronate-based carbamate leaving group as the HO reactive trigger and 6-(benzo[]thiazol-2'-yl)-2-(,-dimethylamino) naphthalene (BTDAN) as the fluorophore was synthesized and examined for its ability to detect cytosolic HO in situ. This probe, based on the specific reaction between boronate and HO, displayed a fluorescent color change (455 to 528 nm) in response to HO in the presence of diverse reactive oxygen species in a physiological medium. In addition, ratiometric two-photon microscopy (TPM) images with SHP-Cyto revealed that HO levels gradually increased from brain to kidney, skin, heart, lung, and then liver tissues. SHP-Cyto was successfully applied to the imaging of endogenously produced cytosolic HO levels in live cells and various rat organs by using TPM.
过氧化氢(HO)在多种生物过程的调节中起着重要作用,并与多种疾病相关。在亚细胞水平上对HO水平进行定量测量对于理解其对生物过程的正负影响至关重要。在此,合成了一种双光子比率荧光探针(SHP-Cyto),其以基于硼酸酯的氨基甲酸酯离去基团作为HO反应触发基团,以6-(苯并[]噻唑-2'-基)-2-(,-二甲基氨基)萘(BTDAN)作为荧光团,并检测了其原位检测胞质HO的能力。该探针基于硼酸酯与HO之间的特异性反应,在生理介质中存在多种活性氧的情况下,对HO呈现出荧光颜色变化(从455 nm到528 nm)。此外,使用SHP-Cyto的比率双光子显微镜(TPM)图像显示,HO水平从脑组织到肾脏、皮肤、心脏、肺,然后到肝脏组织逐渐升高。通过TPM,SHP-Cyto成功应用于活细胞和各种大鼠器官中内源性产生的胞质HO水平的成像。