SGI-1776 free base, N-((1-methylpiperidin-4-yl)methyl)-3-(3-(trifluoromethoxy)phenyl)imidazo[1,2-b]pyridazin-6-amine, is a potent ATP-competitive inhibitor of the serine/threonine family of Pim kinase, an enzyme regulating cell survival. Through extensive biomedical characterization, SGI-1776 exhibits specificity to the three isoforms of the Pim family, including Pim-1, Pim-2, and Pim-3. According to preliminary results from studies treating prostate cancer cells, SGI-1776 dose-dependently reduces phosphorylation of known Pim kinase substrates involved in cell cycle progression and apotosis (p21Cip1/WAF1 and Bad), compromises overall cell viability by inducing G1 cell cycle arrest and triggering apoptosis, and reduces cell viability in a multidrug resistance 1 (MDR1) protein based taxane-refractory prostate cancer cell line.