We subsequently evaluated our anti‐PSMA LNPs (0.2% VHH‐DSPE‐PEG post‐insertion) in vitro using two mouse melanoma cell lines that were identical except for their PSMA expression: B16‐F10 cells (PSMA−) and B16‐F10‐PSMA cells (PSMA+). This evidence concerns the gene FOLH1 and melanoma.