Abstract
We report herein the discovery of a positron emission tomography (PET) tracer for the (NOD)-like receptor protein 3 (NLRP3). Our recent medicinal chemistry campaign on developing sulfonamide-based NLRP3 inhibitors led to an analog, 1, with a methoxy substituent amenable to labeling with carbon-11. PET/CT imaging studies indicated that [11C]1 exhibited rapid blood–brain barrier (BBB) penetration and moderate brain uptake, as well as blockable uptake in the brain. [11C]1, thus suggesting the potential to serve as a useful tool for imaging NLRP3 inflammasome in living brains.
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