Our TKI

EYP-1901™VorolanibDurasert E™

EYP-1901: combining vorolanib and Durasert E™

EYP-1901 combines vorolanib with the Durasert E technology to deliver a continuous daily dose for at least 6 months. It is currently being investigated in pivotal phase 3 trials for the treatment of wet AMD and DME.

To date, EYP-1901 has been studied in >190 patients across four phase 1 and 2 clinical trials, with a favorable safety profile. A recent independent review of the phase 3 LUGANO/LUCIA masked safety data showed that the observed safety profile is consistent with previous EYP-1901 clinical trials.

EYP-1901 Summary

Blocks signaling from all VEGF isoforms and PDGF at the receptor level and inhibits IL-6 pro-inflammatory signaling

Therapeutic levels of vorolanib reached within hours*

Consistent daily dosing for ≥6 months*

No free-floating drug particles

Preloaded sterile IVT syringe injector; to be shipped and stored at an ambient temperature

*Data from preclinical studies. Following a single EYP-1901 900-µg dose in Dutch-Belted rabbits, vorolanib reached concentrations exceeding IC50 in the choroid and retina within hours of administration.

Novel multi-moa blocking signaling from VEGF isoforms at the receptor level

Vorolanib intracellularly binding to VEGFR

*Data from preclinical studies. Following a single EYP-1901 900-µg dose in Dutch-Belted rabbits, vorolanib reached concentrations exceeding IC50 in the choroid and retina within hours of administration.

Our tyrosine kinase inhibitor (TKI): Vorolanib

Vorolanib, a small molecule TKI, works intracellularly, binding to key receptors involved in wet AMD and DME pathogenesis, while anti-VEGFs act extracellularly binding to select VEGF ligands.

Vorolanib is a TKI that binds to VEGFR-1/2/3, PDGFR, and JAK-1, to inhibit angiogenic and IL-6 pro-inflammatory signaling.

Vorolanib has a multi-mechanism of action (MOA) for VEGF- and IL-6-mediated retinal diseases

Diagram illustrating vorolanib’s multi-mechanism of action, showing inhibition of VEGFR-1, VEGFR-2, VEGFR-3, PDGFR, and IL-6 signaling pathways involved in angiogenesis, inflammation, and cell proliferation in retinal disease.

PDGF contributes to pathological fibrosis and pericyte recruitment, potentially leading to treatment resistance.

Based on pre-clinical data, vorolanib acts within endothelial cells to inhibit the downstream activation of VEGFR-1/2/3, PDGFR, and IL-6 pro-inflammatory signaling.

Vorolanib uniquely targets JAK-1, directly suppressing IL-6 pro-inflammatory signaling.Vorolanib uniquely targets JAK-1, directly suppressing IL-6 pro-inflammatory signaling.

IL-6 plays a critical role alongside VEGF-driven signaling to promote vascular permeability in wet AMD and DME.1,2

Vorolanib has been shown to:

  • Inhibits VEGFR 1/2/3*
  • Inhibit IL-6 pro-inflammatory activity*
  • Potentially offer more comprehensive disease control

Based on pre-clinical data, vorolanib acts within the endothelial cells to inhibit the downstream activation of VEGFR-1/2/3, PDGFR, and IL-6 pro-inflammatory signaling.

Comparison of Vorolanib and Anti-VEGFs: MOA and Drug Delivery Profiles

EYP-1901
Anti-VEGF Agents
Site of Action
Intracellular
Extracellular
MOA
A small molecule that binds to receptor tyrosine kinases
Biologics bind to VEGF ligands, thereby preventing the receptor from being activated
Target Profile
  • VEGFR-1/2/3
  • PDGFR
  • JAK-1 (IL-6 pathway)
Primarily targeting VEGF-A
Delivery and Durability
Sustained release: a continuous daily dose for at least 6 months
Rapid vitreous clearance limits durability and requires frequent injections, 4-16 weeks
Vorolanib

Site of Action

Intracellular

MOA

A small molecule that binds to receptor tyrosine kinases

Target Profile

  • VEGFR-1/2/3
  • PDGFR
  • JAK-1 (IL-6 pathway)

Delivery and Durability

Sustained release: a continuous daily dose for at least 6 months

Anti-VEGF Agents

Site of Action

Extracellular

MOA

Biologics bind to VEGF ligands, thereby preventing the receptor from being activated

Target Profile

Primarily targeting VEGF-A

Delivery and Durability

Rapid vitreous clearance limits durability and requires frequent injections, 4-16 weeks

Anti-VEGFs with additional targets: aflibercept binds placental growth factor (PlGF); faricimab-svoa binds angiopoietin-2 (Ang2).

Durasert E™: a next-generation sustained delivery technology

Durasert E™ is an investigational next-generation bioerodible intravitreal insert that delivers a continuous daily dose of vorolanib for at least 6 months. It is currently being studied in four phase 3 trials.

Durasert® technology has been proven safe following use in thousands of eyes across 4 FDA-approved products: Vitrasert®, Retisert®, ILUVIEN®, and YUTIQ®.

Next-generation bioerodible intravitreal insert

For illustrative purposes only. Insert not to scale.

Each insert is:

  • 94% drug/6% matrix
  • ~1/5000th of the vitreous volume
  • No PEG/PLGA

EYP-1901 Continuously Delivers Vorolanib For At Least 6 Months — A Time-Lapse Perspective

For illustrative purposes only.

EYP-1901 combines vorolanib with next-generation Durasert E technology to deliver a continuous daily dose for at least 6 months.

AMD, age-related macular degeneration; DME, diabetic macular edema; FDA, US Food & Drug Administration; IC, inhibitory concentration; IVT, intravitreal; MOA, mechanism of action; PDGFR, platelet-derived growth factor receptor; PEG, polyethylene glycol; PLGA, poly lactic-co-glycolic acid; TKI, tyrosine kinase inhibitor; VEGF, vascular endothelial growth factor.

EYP-1901 is an investigational product and the safety and efficacy of EYP-1901 has not been established. FDA has not approved EYP-1901 in the United States. The materials discussed on this site do not predict future FDA approval. Conclusive evidence of efficacy and safety of EYP-1901 will require further investigation in well-controlled Phase 3 clinical trials.

References:

  1. Funatsu H, Yamashita H, Ikeda T, et al. Vitreous levels of interleukin-6 and vascular endothelial growth factor are related to diabetic macular edema. Ophthalmology. 2003;110(9):1690-1696. doi:10.1016/S0161-6420(03)00568-2
  2. Manda A, Lee LH, Steinkerchner M, et al. Analysis of aqueous interleukin-6 in diabetic retinopathy: a prospective, controlled trial of 328 eyes. Ophthalmology Retina. 2026; 10(1):81-87. doi:10.1016/j.oret.2025.06.014