hrp0097rfc12.6 | Thyroid | ESPE2023

Phenylbutyrate treatment of three patients with Monocarboxylate Transporter 8 deficiency

Zung Amnon , Schreiner Felix , Vollbach Heike , Schweizer Ulrich , Banne Ehud , Braun Doreen

Background: Monocarboxylate transporter 8 (MCT8) deficiency is a rare genetic disease that leads to severe global developmental delay. Thyroid hormone (TH) profile is characterized by high T3 and low T4 levels, with normal or elevated TSH. Recent studies have shown that the chemical chaperone phenylbutyrate (PB) restored mutant MCT8 function and increased TH content in a patient-derived cell model, making it a potential treatment for MCT8 deficiency.<p cla...