L-755,507 is characterized as a potent and selective 3 adrenergic receptor partial agonist with EC50 of 0.43 nM. It is also recently identified to enhance CRISPR-mediated homology-directed repair (HDR) efficiency in human induced pluripotent stem cells (iPSCs) and other cell types.L-755,507 displays an excellent activity profile as an extremely potent human 3 adrenergic receptor agonist (3 EC50 0.43 nM), with >440-fold selectivity over 1 and 2 binding[1]. L755507 causes a robust concentration-dependent increase in cAMP accumulation in CHO-K1 cells expressing human 3-adrenoceptors(pEC50 values of 12.3)[4]. In a recent study employing a high-throughput screen to identify chemicals capable of modulating HR-mediated genome editing, L-755507 is identified that could enhance HR repair by up to ninefold.
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