MCL1 and hepatocellular carcinoma: Despite the let-7g being reported to negatively regulate Bcl-xL expression and induce apoptosis in cooperation with anticancer drug targeting Mcl-1 in HCC [12] and to inhibit the cell migration in HCC through targeting collagen type I α2 [10], the underlying mechanism by which let-7g works to inhibit proliferation and migration in HCC remains largely unknown.