PAX7 and neoplasm: Interestingly, U29415 tumor cells of Pax7CreER satellite cell lineage showed a paradoxical increase in mRNA levels of Pax7 and Pax3:Foxo1 when treated with 20 μM 5-Aza-2′deoxycytidine, 15 μM entinostat, and 5 μM SAHA (Fig. 4A).