What the study found
The study found that extracellular vesicles, which are tiny membrane-bound particles released by cells, could deliver miR-181a-3p to retinal ganglion cells and support their survival and function. Among four candidate microRNAs tested, miR-181a-3p showed the strongest preservation of retinal ganglion cell survival.
Why the authors say this matters
The authors suggest that extracellular vesicles may provide a biocompatible, cell-specific, and functionally effective way to deliver microRNAs to the retina. They conclude that EV-based administration of miR-181a-3p may represent a novel neuroprotective strategy for glaucoma and related optic neuropathies.
What the researchers tested
The researchers screened four candidate microRNAs, selected from prior profiling of injured retinal ganglion cells, in primary rat retinal cultures and human embryonic stem cell-derived retinal ganglion cells. They then loaded miR-181a-3p into extracellular vesicles from R-28 retinal precursor cells using electroporation and assessed particle properties, uptake, distribution, and neuroprotective effects in vitro and in vivo.
What worked and what didn't
miR-181a-3p was the candidate that best preserved retinal ganglion cell survival. EV-mediated delivery of miR-181a-3p improved retinal ganglion cell survival and preserved intracellular calcium dynamics compared with free miRNA or lipofectamine-based transfection, and EV loading improved delivery to the retina in vivo. The EV approach also improved miRNA stability, enabled selective targeting of retinal cell types, and partially modulated the p38/MAPK signalling axis.
What to keep in mind
The abstract does not describe detailed limitations or long-term outcomes. The findings are based on cell culture experiments and in vivo retinal delivery studies, so the summary provided here does not show whether the approach has been tested for clinical use in people.
Key points
- miR-181a-3p was the strongest of four tested microRNA candidates for preserving retinal ganglion cell survival.
- Extracellular vesicles from R-28 retinal precursor cells were loaded with miR-181a-3p using electroporation.
- EV-mediated delivery improved retinal ganglion cell survival and preserved intracellular calcium dynamics better than free miRNA or lipofectamine-based transfection.
- EV loading improved miRNA stability and retinal delivery in vivo.
- The authors report partial modulation of the p38/MAPK signalling axis.
Disclosure
- Research title:
- EV delivery of miR-181a-3p protected degenerating retinal ganglion cells
- Authors:
- Esmahan Durmaz, Kubra Trabzonlu, Maryam Esmaeili, Hanady Nehme, Lydia Alverez-Erviti, Yasir Ahmed Syed, Aled Clayton, Ben Mead
- Institutions:
- Alanya University, Cardiff University, Cardiff University, Cardiff University, Cardiff University, Cardiff University, Cardiff University, Center for Biomedical Research of La Rioja
- Publication date:
- 2026-01-21
- OpenAlex record:
- View
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