By regulating the miR-301a-3p/STAT3 axis, curcumin increases the expression of miR-301a-3p, decreases the expression of MMP-9 and EMT markers, and inhibits the viability, migration, and invasion of TPC-1 papillary thyroid cancer cells [124]. The gene discussed is MMP9; the disease is thyroid gland papillary carcinoma.