Solutions for the Eye

SNK-125 ocular hydrogel is made of the natural polysaccharide hyaluronan – a component of the native vitreous humor – crosslinked with polyethylene glycol using stable chemistry. Created in https://BioRender.com.

Synakis has developed a novel hydrogel biomaterial, SNK-125, specifically designed for ocular delivery. SNK-125 is injectable, biocompatible, biodegradable, non-swelling and transparent. SNK-125 is made of the natural polysaccharide hyaluronan, which is then crosslinked using stable chemistry. We are developing SNK-125 as a vitreous substitute for retinal surgery and to deliver engineered therapeutics to treat leading causes of blindness.


What is our Technology Used For?

SNK-125: Vitreous Substitute for Retinal Detachment Surgery

During retinal surgery, the native vitreous humor is removed to access and repair the retina. At the end of the surgery, a substitute material (gas or silicone oil) is injected to ensure the retina remains attached during recovery. Created in https://BioRender.com.

The Problem: Various retinal conditions, including retinal detachment, require a vitrectomy: surgical removal of the vitreous humor to access and repair the retina. The vitreous is then replaced with a substitute material to ensure the retina stays attached during recovery. Current clinical substitutes – gases and silicone oils – cause significant discomfort during patient recovery, including blurred vision, extensive head posturing, risk of glaucoma, and follow-up surgeries. As a result, patients are precluded from work, leisure activities, and air travel for several weeks or longer. There is a significant unmet need for a new biomimetic vitreous substitute to improve patient recovery following retinal surgery.


Our Solution: Synakis’ novel biomaterial SNK-125 is a promising alternative to the suboptimal materials currently used in the clinic. SNK-125 is injectable, transparent, biocompatible, biodegradable, non-swelling, and fully compatible with current vitreoretinal surgical procedures. SNK-125 will allow patients recovering from retinal surgery to see clearly and avoid extensive head posturing, conferring a comfortable recovery and quick return to normal life.



Synakis’ biomimetic hydrogel SNK-125 is injectable, biocompatible, non-swelling, and transparent. SNK-125 is an ideal alternative to gases and silicone oils as a vitreous substitute for retinal surgery. Created in https://BioRender.com.

Our technology will be transformative for patients.
— Dr. Robert Devenyi, Ophthalmologist & Vitreoretinal Surgeon, CMO & Co-Founder of Synakis

SNK-225: Periocular Delivery of Long-Acting Drug Formulations

SNK-225: prodrug formulations are embedded in Synakis’ ocular hydrogel and administered to the subconjunctival space for long-acting delivery to the eye. Created in https://BioRender.com. Adapted from Dang et al. Adv. Mater. 2025, 37, 2419306, https://doi.org/10.1002/adma.202419306. © 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.

The Problem: Treatment of glaucoma requires administration of therapeutic eye drops daily, or intracameral implants that require invasive injections.

Our Solution: Synakis has developed SNK-225: our novel biomaterial loaded with with prodrug formulations to deliver a long-acting treatment for glaucoma. Non-invasive administration of SNK-225 into the subconjunctival space provides a prolonged delivery of small molecule therapeutics which obviate the need for daily eye drops or intracameral injections.


SNK-325: Intravitreal Delivery of Stabilized Biologic Therapeutics

The Problem: Use of biologic therapeutics to treat retinal degenerative diseases is hindered by rapid biologic degeneration and poor pharmacokinetics. Frequent intravitreal injections are required to achieve a therapeutic effect.

Our Solution: Synakis has developed SNK-325: our novel biomaterial combined with state-of-the-art protein engineering techniques to stabilize biologic therapeutics and mediate their extended delivery to the back of the eye. SNK-325 provides enhanced bioavailability and a prolonged therapeutic window to reduce the frequency of injections.

SNK-325: Synakis’ ocular hydrogel is combined with protein engineering to deliver stabilized biologics to the back of the eye. Created in https://BioRender.com.


The science behind our technology has been published in the peer-reviewed literature and is patented

Publications

  • Dang, M. et al. (2025) Colloid-Forming Prodrug-Hydrogel Composite Prolongs Lower Intraocular Pressure in Rodent Eyes after Subconjunctival Injection. Advanced Materials, 37, 2419306. https://doi.org/10.1002/adma.202419306

  • Baker, A.E.G. et al. (2021) Stable oxime-crosslinked hyaluronan-based hydrogel as a biomimetic vitreous substitute. Biomaterials, 271, 120750. http://doi.org/10.1016/j.biomaterials.2021.120750

  • Baker, A.E.G. et al. (2019) Benchmarking to the Gold Standard: Hyaluronan-Oxime Hydrogels Recapitulate Xenograft Models with In Vitro Breast Cancer Spheroid Culture. Advanced Materials, 31, 1901166. http://doi.org/10.1002/adma.201901166

Book Chapters

Patents

  • Shoichet, M.S., Baker, A.E.G., Tam, R.Y. (2020) Hydrogel compositions and uses thereof. WO2021000050A1