USP28 and cancer: To investigate a therapeutic potential of targeting the USP28‐∆Np63 axis in SCC cells of different origins, we used a set of human cancer cell lines, comprising the pancreas lines PANC‐1 (ADC) and BXPC‐3 (SCC); cervical cancer cell lines HeLa (ADC), SiHa and Ca Ski (SCC); the head‐and‐neck cell line Detroit 562 (SCC); and the lung cell lines H1299 (ADC) and LUDLU‐1adh (SCC).