Tezacaftor-d4 (VX-661-d4) is the deuterium-labeled Tezacaftor (HY-15448), a F508del CFTR corrector. Tezacaftor helps CFTR protein reach the cell surface.

氢、碳和其他元素的稳定重同位素已被掺入药物分子中，主要用作药物开发过程中定量的示踪剂。氘代因其可能影响药物的药代动力学和代谢特征而受到关注。
然而，Ivacaftor (VX-770，HY-13017) 这种 CFTR 增效剂，有助于延长细胞表面 CFTR 蛋白通道的开放时间。Tezacaftor 与 Ivacaftor 结合，显示出对囊性纤维化和 CFTR Phe508del 突变纯合子疾病的有力效果。此外，Elexacaftor (VX-445，HY-111772) 也是一种 CFTR 校正器。 Elexacaftor-Tezacaftor-Ivacaftor 针对至少有一个 Phe508del 突变的囊性纤维化（CF），通常可避免肺移植适应症^[4]。

西域 has not independently confirmed the accuracy of these methods. They are for reference only.

• . Russak EM, et al. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019;53(2):211-216.  [Content Brief]

  . Treatment with VX-661 and Ivacaftor in a Phase 2 Study Resulted in Statistically Significant Improvements in Lung Function in People with Cystic Fibrosis Who Have Two Copies of the F508del Mutation. April 18, 2013

  . Taylor-Cousar JL, et al. Tezacaftor-Ivacaftor in Patients with Cystic Fibrosis Homozygous for Phe508del. N Engl J Med. 2017 Nov 23;377(21):2013-2023.  [Content Brief]

  [4]. Burgel PR, et al. Rapid Improvement after Starting Elexacaftor-Tezacaftor-Ivacaftor in Patients with Cystic Fibrosis and Advanced Pulmonary Disease. Am J Respir Crit Care Med. 2021 Jul 1;204(1):64-73.  [Content Brief]