Cells were treated with leukemia inhibitory factor (LIF), WNT activator, and FGF2 for 24 hours and with LIF and FGF2 for another 24 hours. Gene expression was determined by RT-PCR and normalized to 18S. n = 6 independent experiments. CCND1, cyclin D1; MDK, midkine; Cux1, CUT-like homeobox 1; JAK2, janus kinase 2; HMGB2, high-mobility group binding 2; ANF, atrial natriuretic factor; BNP, B-type natriuretic factor; MyHC, myosin heavy chain; SERCA, SR-Ca2+ ATPase. P values were determined by two-sided Wilcox rank-sum t test.