Constitutive Expression of FasL in Thyrocytes

C. Giordano et al . ([1][1]) reported evidence that the ligand for Fas antigen (FasL) is constitutively expressed on thyroid follicular cells from both normal and Hashimoto's thyroiditis (HT) tissue, and that normal thyrocytes express Fas antigen only after induction with interleukin-1β (IL-1β).