Mechanism of action

Lumvoa™ (veligrotug-vvze) is a full antagonist for near-complete IGF-1R signaling inhibition1,2

Lumvoa is a full IGF‑1R antagonist that blocks IGF‑1 from binding to IGF‑1R in orbital fibroblasts.1,2

In preclinical studies, Lumvoa inhibits both proximal and distal IGF‑1R signaling.2

This may reduce downstream effects that contribute to orbital inflammation and tissue remodeling.2,3

The Lumvoa mechanism of action in patients with thyroid eye disease has not been fully characterized and is based on preclinical data.4 Additionally, head-to-head efficacy/safety clinical studies between IGF-1R antagonists have not been conducted. The clinical significance of any differences in pharmacological properties is not known.

IGF-1=insulin-like growth factor-1; IGF-1R=insulin-like growth factor-1 receptor; TSH=thyroid stimulating hormone.

Lumvoa has been studied in both active and chronic TED4

  1. Yen MT, Cockerham K, Saeed P, et al. THRIVE: a phase 3, randomized, double-masked, placebo-controlled study of veligrotug for active thyroid eye disease. Ophthalmology. 2026. doi:10.1016/j.ophtha.2026.04.022
  2. Kaplan R, Zhao Y, Tsai J, et al. Preclinical pharmacology, pharmacokinetics, and pharmacodynamics of veligrotug, a full antagonist antibody to the IGF-1 receptor in development for thyroid eye disease. mAbs. 2025. doi:10.1080/19420862.2025.2585616
  3. Smith TJ, Janssen J. Insulin-like growth factor-I receptor and thyroid-associated ophthalmopathy. Endocr Rev. 2019;40(1):236–267.
  4. Lumvoa™ (veligrotug-vvze). Prescribing Information. Viridian Therapeutics, Inc; 2026.