Abstract
Various fluorescent probes for the detection of intracellular reactive oxidative species (ROS) have been developed because ROS levels are closely associated with cellular states. Here, we describe a method for detection of intracellular ROS in living cells using the fluorescent probe, hydroxyphenyl fluorescein (HPF), which detects hydroxyl radicals and peroxynitrite. NIH3T3 cells and p53 knockout (p53-/-) mouse embryonic fibroblasts (MEFs) were transformed by expressing oncogenic RAS using a retrovirus system. The cells were treated with HPF at 37°C for 30min, and subsequently, images were acquired using a confocal fluorescence microscope at an excitation wavelength of 488nm after washing with PBS.
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