FSCN1 and melanoma: We then confirmed the opposite regulation of FSCN1 and miR‐143/‐145 cluster expression upon BRAFi treatment both in vivo using xenografted nude mice (tumors analyzed at the endpoint, as described in Girard et al (2020)) and in vitro with different human BRAF mutant melanoma cells (Figs 5A and EV4B).