H19 and cancer: RNA-binding protein HNRNPA2B1 is involved in the transportation and posttranscriptional regulation of numerous cancer-progression-related micro RNA (miRNAs) and long noncoding RNA (lncRNA) through binding of the specific motifs GGAG/CCCU such as miR-934, Linc01232, miR100HG, H19 and RP11 [46,47].