GLS and thyroid cancer: As a result, the mRNA levels of GLS and GDH in normal thyroid follicular epithelial cells (Nthy-ori 3–1) were lower than those in thyroid cancer cells, including PTC cell lines (TPC-1, BCPAP and K1), an FTC cell line (FTC-133), and an ATC cell line (8305C) (Fig. 1I).