Abstract
The retinal pigment epithelium (RPE) is a highly specialized cell type located between the choroid and neural retina of the eye. RPE degeneration causes irreversible visual impairment, extending to blindness. Cell therapy has recently emerged as a potential therapeutic approach for retinal degeneration. MicroRNA-based differentiation of stem cells is a new strategy for producing tissue-specific cell types. In this study, we developed a novel microRNA-based strategy for RPE induction from human amniotic epithelial stem cells (AESCs). We identified microRNAs involved in RPE development in AESCs. Of 29 putative human RPE-relevant microRNAs, microRNA-410 (miR-410) was predicted to target multiple RPE development-relevant genes. Inhibition of miR-410 induces overexpression of immature and mature RPE-specific factors, including OTX2, RPE65, Bestrophin and EMMPRIN. These RPE-like cells were morphologically altered toward a cobblestone-like shape and were able to phagocytize microbeads. We showed that miR-410 directly regulates predicted target genes OTX2 and RPE65. Our microRNA-based strategy demonstrated RPE differentiation in AESCs by treatment of an antisense microRNA-410 (anti-miR-410), without the use of additional factors or exogenous transduction. These findings suggest that miR-410 inhibition can be a useful tool for directed cell differentiation and an attractive method for cell therapy in human retinal degenerative diseases.
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Acknowledgments
This research was supported by the MOTIE (The Ministry of Trade, Industry and Energy), Korea, under the Global collaborative R&D program (No. M0000049) supervised by the KIAT (Korea Institute for Advancement of Technology), and partially supported by the Research Institute for Veterinary Science, Seoul National University (SNU, Republic of Korea).
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Soon Won Choi and Jae-Jun Kim These authors contributed equally to this work.
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Choi, S.W., Kim, JJ., Seo, MS. et al. miR-410 Inhibition Induces RPE Differentiation of Amniotic Epithelial Stem Cells via Overexpression of OTX2 and RPE65. Stem Cell Rev and Rep 11, 376–386 (2015). https://doi.org/10.1007/s12015-014-9568-2
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DOI: https://doi.org/10.1007/s12015-014-9568-2