Abstract
Due to the limited accessibility of the human retina, retinal organoids (ROs) are the best model for studying human retinal disease, which could reveal the mechanism of retinal development and the occurrence of retinal disease. Microglia (MG) are unique resident macrophages in the retina and central nervous system (CNS), serving crucial immunity functions. However, retinal organoids lack microglia since their differentiation origin is the yolk sac. The specific pathogenesis of microglia in these retinal diseases remains unclear; therefore, the establishment of a microglia-incorporated retinal organoid model turns out to be necessary. Here, we successfully constructed a co-cultured model of retinal organoids with microglia derived from human stem cells. In this article, we differentiated microglia and then co-cultured to retinal organoids in the early stage. As the incorporation of immune cells, this model provides an optimized platform for retinal disease modeling and drug screening to facilitate in-depth research on the pathogenesis and treatment of retinal and CNS-related diseases.
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