FNDC5 and cancer: The exposure of endometrial (KLE and RL95-2), colon (HT2 and, MCA38), thyroid (SW579 and BHP7) and esophageal (OE13 and OE33) cancer cells to physiological (5–10 nmol/L) and high physiological/pharmacological (50–100 nmol/L) concentrations of irisin did not affect cell adhesion and colony formation [76] (Table 1).