decrease in pH of the intracellular environment. In this work, a fluorescence resonance energy transfer (FRET)-based ratiometric two-photon fluorescent pH probe, FRET-pH, has been designed and fully characterized to monitor the pH change so as to understand the extent of the TBI process. FRET-pH, which has nearly 100% energy transfer efficiency and ∼100-fold ratio signal changes, is constructed from a naphthalene
通常认为,创伤性脑损伤(TBI)过程是神经退行性疾病的重要原因,其伴随着细胞内环境pH的降低。在这项工作中,已经设计了基于荧光共振能量转移(FRET)的比例式双光子荧光pH探针FRET-pH并对其进行了全面表征,以监测pH的变化,从而了解TBI过程的程度。FRET-pH具有接近100%的能量传递效率和约100倍比率的信号变化,它是由
萘衍
生物ADN作为双光子荧光团和SRhB作为pH的识别域构成的。酸碱度显示
水溶液对pH值的一光子和两光子比率响应。适当的p K a值(5.89)支持其在后续
生物学应用中的使用。最后,已经实现了活HeLa细胞,BV-2细胞和大鼠脑组织中pH值的双光子显微成像。