Hydrogel supports visual recovery in mice after optic nerve injury

A single administration of CMCDA preserved retinal ganglion cells and promoted visual recovery in injured mice. Researchers at National Taiwan University and National Taiwan University Hospital tested the catechol-functionalized carboxymethyl cellulose hydrogel, called CMCDA, after an optic nerve crush injury—the laboratory model used in the study.

The gel is designed for minimally invasive intravitreal injection. Its cellulose-based structure combines antioxidant, tissue-adhesive, self-healing and biodegradable properties, forming a platform for localized and sustained retinal neuroprotection, according to the researchers.

In the mouse model, a single administration reduced oxidative stress and neuroinflammation, preserved retinal ganglion cells and promoted neuronal and axonal repair. Single-cell RNA sequencing also showed that CMCDA reshaped the retinal microenvironment, suppressing pathways associated with oxidative stress, apoptosis, inflammation and gliosis while promoting protective and regenerative responses.

So what does it change in practice? For now, it offers a possible minimally invasive route to protect vision after acute optic nerve injury, where effective treatments remain limited. The immediate beneficiaries are laboratory animals in a preclinical experiment; patients are not yet included. The researchers’ visual-recovery result still needs to be tested beyond this mouse model before its clinical value can be judged.