miR-21 modulates the expression of Serpini1 and directly interacts with Serpini1 3’UTR.
Panel A. Representative Western blot demonstrating increased protein level of Serpini1 following miR-21 inhibition (21-I in the figure). NSI – non specific inhibitor.
Panel B. MKN28 cells were transfected with a fragment of Serpini1 3’UTR (Serpini1 in the figure) or with a fragment of Serpini1 3’UTR with a mutated miR-21 binding site (Serpini1Mut in the figure), cloned downstream of the luciferase promoter. These cells were co-transfected with either miR-21 inhibitor (21Inh in the figure) or with a non-specific inhibitor (NSI in the figure). miR-21 inhibitor moderately increases the activity of the luciferase compared to the mutated control. Y-axis: arbitrary luminescence units. Standard errors are shown.