These apoptosis-related genes inhibited by miR-637 include HEMGN in PTC [12], KLK4 in TC [52], CALA [55] and APLN [15] in GC, LIF in HCC [21] and TNBC [29], WNT1 in CRC [56], AKT1 in PDAC [23], LY6E in CHOL [36], NUPR1 in OSCC [35] and MM [33], PLXNB2 in OC [27], and ABL1 in CML [34]. Here, KLK4 is linked to hepatocellular carcinoma.