A bilayer photoreceptor‐retinal tissue model with gradient cell density design: A study of microvalve‐based bioprinting |
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| Authors: | Pujiang Shi Yong Sheng Edgar Tan Wai Yee Yeong Hoi Yeung Li Augustinus Laude |
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| Affiliation: | 1. Singapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore;2. School of Biological Sciences, Nanyang Technological University, Singapore;3. National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore;4. School of Materials Science and Engineering and Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore;5. Singapore Eye Research Institute, Singapore |
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| Abstract: | ARPE‐19 and Y79 cells were precisely and effectively delivered to form an in vitro retinal tissue model via 3D cell bioprinting technology. The samples were characterized by cell viability assay, haematoxylin and eosin and immunofluorescent staining, scanning electrical microscopy and confocal microscopy, and so forth. The bioprinted ARPE‐19 cells formed a high‐quality cell monolayer in 14 days. Manually seeded ARPE‐19 cells were poorly controlled during and after cell seeding, and they aggregated to form uneven cell layer. The Y79 cells were subsequently bioprinted on the ARPE‐19 cell monolayer to form 2 distinctive patterns. The microvalve‐based bioprinting is efficient and accurate to build the in vitro tissue models with the potential to provide similar pathological responses and mechanism to human diseases, to mimic the phenotypic endpoints that are comparable with clinical studies, and to provide a realistic prediction of clinical efficacy. |
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| Keywords: | age‐related macular degeneration (AMD) bioprinting retina retinoblastoma tissue model |
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