OCT-4, SOX2 and NANOG expression in untreated and treated transformed parental trophoblast cells and spheroids (A) (B) (C) (D) Immunoblots showing the expression of OCT-4, SOX2, NANOG, CDX2 and corresponding β-actin loading controls in HTR8/SVneo and TEV-1 untreated and treated transformed parental trophoblast cells and spheroids.