Teprotumumab (Anti-IGF-1R / CD221) is an IGF-1 receptor (IGF-1R) blocking human monoclonal antibody. Teprotumumab binds to the ligand binding extracellular α-subunit domain of IGF-1R. Teprotumumab inhibits TSH and IGF-1 action in fibrocytes. Teprotumumab can be used for thyroid-associated ophthalmopathy research.MW: 145.5 KD.