Radiosynthesis, In Vitro and In Vivo Evaluation of [18F]CBD-2115 as a First-in-Class Radiotracer for Imaging 4R-Tauopathies

Abstract excerpt

CBD-2115 was selected from a library of 148 compounds based on a pyridinyl-indole scaffold as a first-in-class 4R-tau radiotracer. In vitro binding assays showed [ 3 H]CBD-2115 had a K D value of 6.9 nM and a nominal B max of 500 nM in 4R-tau expressing P301L transgenic mouse tissue. In binding assays with human brain tissue homogenates, [ 3 H]CBD-2115 has a higher affinity (4.9 nM) for progressive supranuclear...

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