Fig. 1

a Densitometric analysis of Western blotting reveals a meaningful decrease of the GPx expression (− 44.4 ± 2.8%, p < 0.01) in cancer (red line) with respect to the healthy thyroid tissue (black line). No differences were found between cancer and healthy tissue for the actin expression (data not shown). b Western blotting analysis of GPx1 and actin expression in cancer (C) and healthy (H) thyroid tissue. The numbers below identify the patient (see Table 1). NS not significant, *p < 0.01)