A Fluorescent Benzo[g]isoquinoline‐Based HIF Prolyl Hydroxylase Inhibitor for Cellular Imaging
2019
: Prolyl hydroxylation domain (PHD) enzymes catalyze the hydroxylation of the transcription factor hypoxia-inducible factor (HIF) and serve as cellular oxygen sensors. HIF and the PHD enzymes regulate numerous potentially tissue-protective target genes which can adapt cells to metabolic and ischemic stress. We describe a fluorescent PHD inhibitor (1-chloro-4-hydroxybenzo[g]isoquinoline-3-carbonyl)glycine which is suited to fluorescence-based detection assays and for monitoring PHD inhibitors in biological systems. In cell-based assays, application of the fluorescent PHD inhibitor allowed co-localization with a cellular PHD enzyme and led to live cell imaging of processes involved in cellular oxygen sensing.
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