PFN1 and cancer: Moreover, these lists contain several candidate invasiveness biomarkers common to MM and other cancer types and reported in the literature, including gelsolin (encoded by GSN), profiling-1 (encoded by PFN1), glutathione-S-transferase P (encoded by GSTP1), keratin, type I cytoskeletal 10 (encoded by KRT10), and serpin H1 (encoded by SERPINH1) [13].