PF-4800567 is a drug developed by Pfizer which acts as a selective inhibitor of the enzymeCasein kinase 1 epsilon (CK1-ε), and has mainly been used in the study of the casein kinase 1 enzymes in the regulation of circadian rhythm,[1][2] as well as showing potential neuroprotective effects.[3] While this research has shown that circadian rhythm is modulated primarily by the alternate isoform CK1-δ rather than CK1-ε,[4] both PF-4800567 and the related non-selective CK1-δ/ε inhibitor PF-670462 were found in animal studies to enhance responses to certain drugs of abuse such as methamphetamine and fentanyl, which suggests a role for CK1-ε in negative regulation of sensitivity to stimulant and opioid drugs.[5][6]
References
^Walton KM, Fisher K, Rubitski D, Marconi M, Meng QJ, Sládek M, et al. (August 2009). "Selective inhibition of casein kinase 1 epsilon minimally alters circadian clock period". The Journal of Pharmacology and Experimental Therapeutics. 330 (2): 430–9. doi:10.1124/jpet.109.151415. PMID19458106. S2CID26565986.