LIU ZENGPINGBHAV HARSHAD PARIKHTan, QSWWONG SOO LINOng, KHYu, WIVAN YU JUN SEAHHolder, GEHunziker, W.Tan, GSWVELUCHAMY AMUTHA BARATHILINGAM GOPALStanzel, BVBlenkinsop, TASu, XPHYSIOLOGYOPHTHALMOLOGY2021-11-192021-11-192021-02-09LIU ZENGPING, BHAV HARSHAD PARIKH, Tan, QSW, WONG SOO LIN, Ong, KH, Yu, W, IVAN YU JUN SEAH, Holder, GE, Hunziker, W., Tan, GSW, VELUCHAMY AMUTHA BARATHI, LINGAM GOPAL, Stanzel, BV, Blenkinsop, TA, Su, X (2021-02-09). Surgical Transplantation of Human RPE Stem Cell-Derived RPE Monolayers into Non-Human Primates with Immunosuppression. Stem Cell Reports 16 (2) : 237-251. ScholarBank@NUS Repository. https://doi.org/10.1016/j.stemcr.2020.12.0072213-6711https://scholarbank.nus.edu.sg/handle/10635/206731Recent trials of retinal pigment epithelium (RPE) transplantation for the treatment of disorders such as age-related macular degeneration have been promising. However, limitations of existing strategies include the uncertain survival of RPE cells delivered by cell suspension and the inherent risk of uncontrolled cell proliferation in the vitreous cavity. Human RPE stem cell-derived RPE (hRPESC-RPE) transplantation can rescue vision in a rat model of retinal dystrophy and survive in the rabbit retina for at least 1 month. The present study placed hRPESC-RPE monolayers under the macula of a non-human primate model for 3 months. The transplant was able to recover in vivo and maintained healthy photoreceptors. Importantly, there was no evidence that subretinally transplanted monolayers underwent an epithelial-mesenchymal transition. Neither gliosis in adjacent retina nor epiretinal membranes were observed. These findings suggest that hRPESC-RPE monolayers are safe and may be a useful source for RPE cell replacement therapy. In this article, Su and colleagues show that hRPESC-RPE transplanted under the macula of non-human primates was able to integrate with host retina, recover RPE-specific markers, and support photoreceptor function. Importantly, transplanted grafts did not undergo epithelial-mesenchymal transition and gliosis was not observed in adjacent retina. Thus, hRPESC-RPE may be a useful source for RPE cell replacement therapy.Macaca fascicularisage-related maculopathycell transplantationepithelial-mesenchymal transitionphotoreceptor cellsretinal pigment epitheliumArticle2021-11-18