Icariin-loaded vesicles tested in retinal organoid injury models
Published in Journals, Nanomedicine, Tools.
Published October 26, 2026.
A study published September 28 in Frontiers in Cell and Developmental Biology tested extracellular vesicles carrying icariin in laboratory models of retinal injury. Mira Park and colleagues used R28 retinal progenitor cells and retinal organoids derived from human embryonic stem cells.
The researchers exposed these models to cobalt chloride, a chemical treatment that mimics aspects of oxygen deprivation. Treatment with icariin-loaded vesicles improved several retinal and neuroprotective markers, reduced HIF-1α accumulation, and shifted gene expression toward retinal development and phototransduction programs. Mitochondrial measurements also showed less reactive oxygen species accumulation and recovery of intracellular ATP production.
The work combines a potential drug-delivery approach with organoids as experimental testing tools. Its limits are essential: these were cell and organoid experiments, not treatments in patients. Changes in genes associated with visual perception do not demonstrate restored vision, and a chemical injury model cannot reproduce every feature of retinal disease. Human safety and clinical benefit remain unestablished.