TIMP1 and cancer: Among these 17 genes, there were genes involved in cancer progression, for instance, the down‐regulated tumor suppressor PTPRS26 and the up‐regulated SERPINA1 whose overexpression was reported to increase invasiveness,27GPNMB, which induces stem‐cell‐like properties in cancer cells,28 and TIMP1 a promoter of tumorigenesis.29