Graybug Vision Initiates Phase 1/2 Trial of GB-102 for Wet Age-related Macular Degeneration

– Novel Injectable Formulation for Potential Twice Per Year Treatment –

Redwood City, CA – September 19, 2017 – Graybug Vision, Inc., a clinical-stage, venture-held pharmaceutical company committed to developing potentially transformative therapies for vision-threatening diseases including wet (neovascular) age-related macular degeneration (AMD) and glaucoma, announced that it has begun dosing patients with wet AMD in its first clinical trial of GB-102, its lead product.

GB-102 is a novel intravitreal (IVT) injectable depot formulation of sunitinib malate, a tyrosine kinase inhibitor that blocks multiple angiogenesis pathways (e.g., VEGFR-1,2,3) with the potential for twice per year treatment of wet AMD. In a preclinical in vivo study, sustained inhibitory drug levels in the retinal tissue were demonstrated through 6 months following a single IVT injection of GB-102. The multicenter clinical trial, which is being conducted in the US, is designed to evaluate the safety, tolerability and efficacy of GB-102, in patients with wet AMD.

“Wet AMD is a leading cause of irreversible vision loss in older adults and current treatments are extremely burdensome due to the need for frequent visits to the retinal specialist for IVT injections,” said Charles Semba, MD, Chief Medical Officer of Graybug Vision. “We believe GB-102 has the potential for twice-yearly treatment and may provide the opportunity to dramatically change the standard-of-care by reducing the frequency of injections for patients and the treating physician.”

This two-part study (“ADAGIO”) will evaluate wet AMD patients currently being treated with available IVT anti-VEGF agents who are then switched over to treatment with GB-102 alone. Part 1 is a multicenter, open-label, single IVT injection study of up to four dose levels of GB-102 administered in ascending dosing cohorts. Following the single IVT injection of GB-102, patients will undergo monthly evaluation for 8 months to assess safety, tolerability, and functional/pharmacodynamic parameters including visual acuity and optical coherence tomography (OCT) of the retina. Part 2 is a multicenter, double-masked, randomized (1:1:1), parallel group, safety, and efficacy evaluation of repeated IVT injections of two dose levels of GB-102 compared to a standard IVT regimen of aflibercept (Eylea®).

Clinical centers are currently recruiting patients. For more information please go to

About Graybug Vision

Graybug Vision is developing novel products for the treatment of patients with vision-threatening ocular diseases. The company’s proprietary injectable products are designed to enable less frequent administration, enhance compliance, and to reduce the burden of treatment for patients with ocular diseases. The company’s lead product, GB-102, has the potential for twice per year IVT injections to treat patients with wet (neovascular) AMD. A second-generation product under development, GB-103, has the potential for once per year IVT treatment of wet AMD.

In addition, preclinical studies are ongoing to select one or more novel compounds for the twice per year treatment of glaucoma. Graybug Vision has developed a library of compounds to treat glaucoma, a leading cause of progressive, irreversible vision loss worldwide, by lowering intraocular pressure alone or in combination with neuroprotection when injected twice per year. For more information, please visit

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Eylea is a registered mark of Regeneron Pharmaceuticals.


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