Modeling of Retina and Optic Nerve Ischemia–Reperfusion Injury through Hypoxia–Reoxygenation in Human Induced Pluripotent Stem Cell-Derived Retinal Ganglion Cells
Tomoyo Yoshida,
Tadashi Yokoi,
Taku Tanaka,
Emiko Matsuzaka,
Yuki Saida,
Sachiko Nishina,
Shuji Takada,
Shigeomi Shimizu,
Noriyuki Azuma
Affiliations
Tomoyo Yoshida
National Center for Child Health and Development, 2-10-1, O-kura, Setagaya-ku, Tokyo 1578535, Japan
Tadashi Yokoi
National Center for Child Health and Development, 2-10-1, O-kura, Setagaya-ku, Tokyo 1578535, Japan
Taku Tanaka
National Center for Child Health and Development, 2-10-1, O-kura, Setagaya-ku, Tokyo 1578535, Japan
Emiko Matsuzaka
National Center for Child Health and Development, 2-10-1, O-kura, Setagaya-ku, Tokyo 1578535, Japan
Yuki Saida
National Center for Child Health and Development, 2-10-1, O-kura, Setagaya-ku, Tokyo 1578535, Japan
Sachiko Nishina
National Center for Child Health and Development, 2-10-1, O-kura, Setagaya-ku, Tokyo 1578535, Japan
Shuji Takada
National Center for Child Health and Development, 2-10-1, O-kura, Setagaya-ku, Tokyo 1578535, Japan
Shigeomi Shimizu
Department of Pathological Cell Biology, Tokyo Medical and Dental University, 1-5-4, Yushima, Bunkyo-ku, Tokyo 1138510, Japan
Noriyuki Azuma
National Center for Child Health and Development, 2-10-1, O-kura, Setagaya-ku, Tokyo 1578535, Japan
Retinal ganglion cells (RGCs) are specialized projection neurons that constitute part of the retina, and the death of RGCs causes various eye diseases, but the mechanism of RGC death is still unclear. Here, we induced cell death in human induced pluripotent stem cell (hiPSC)-derived RGC-rich retinal tissues using hypoxia–reoxygenation in vitro. Flow cytometry, immunochemistry, and Western blotting showed the apoptosis and necrosis of RGCs under hypoxia–reoxygenation, and they were rescued by an apoptosis inhibitor but not by a necrosis inhibitor. This revealed that the cell death induced in our model was mainly due to apoptosis. To our knowledge, this is the first model to reproduce ischemia–reperfusion in hiPSC-derived RGCs. Thus, the efficacy of apoptosis inhibitors and neuroprotective agents can be evaluated using this model, bringing us closer to clinical applications.
