IC261 leads to a p53-dependent arrest of the cells with a DNA content of 4 N. It can produce effects on cell cycle progression that are indistinguishable from an established spindle poison and are dependent on the p53 status of the cells.
In vivo
Intrathecal injection of a CK1 inhibitor IC261 attenuates neuropathic pain behaviors. CK1 inhibitors are found to be effective in reducing spinal excitatory response elicited by the presynaptic electrical stimulation only in neuropathic mice. Targeting CK1 isoforms by IC261 influences both pancreatic tumour cell growth and apoptosis sensitivity in vitro and the growth of induced tumours in vivo.