COL1A1 and Hepatic fibrosis: Another study showed that miR-193a/b-3p overexpression attenuates liver fibrosis by suppressing the proliferation and activation of hepatic stellate cells (HSCs) via repression of collagen type I α1 (Col1α1) and α-smooth muscle actin expression, and by inhibiting the activation of the TGF-β/Smad signalling pathway [42].