H19 and type 2 diabetes mellitus: In light of a previous report on H19 increase in T2D patient livers17 and our own observation from human endometrial cancer cells that downregulation of H19 correlated with increased promoter methylation of Hnf4α (Supplementary Data S1 in ref. 16), we wanted to test whether H19 might regulate Hnf4α in the fetal liver.