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Expression Sites of Neural Stem Cell-Related Genes in the Monkey Retina

Maho Shibata, Tsunehiko Ikeda, Kimitoshi Nakamura, Keigo Kakurai, Seita Morishita, Masanori Fukumoto, Teruyo Kida, Taeko Horie and Hidehiro Oku

Objectives: Based on the hypothesis that undifferentiated retinal stem cell (RSC)-like cells exist in the fovea (the light-stressed, concave, avascular center of the retina where light is focused), we investigated the expression sites of neural stem cell (NSC)-related genes in the monkey retina.
Methods: Cynomolgus monkeys were euthanized, and both eyes were then enucleated. Each eye was hemisected near the limbus, and flat-mounted retina samples were then prepared. Using a stereomicroscope, 1-mm x 1-mm blocks of the retina at the fovea, mid-periphery, and extreme periphery were then excised. These samples were used for real-time polymerase chain reaction analysis of the NSC-related gene (nestin, PAX6, and SOX2) expression at each site.
Results: Nestin expression was high in the fovea, with a lower expression in the mid-periphery and extreme periphery. No differences in PAX6 gene expression were found in the fovea, mid-periphery, and extreme periphery. SOX2 expression was highest in the extreme periphery, with decreased expression in the mid-periphery and fovea.
Conclusions: Our finding that nestin expression was highest in the fovea suggests that foveal retinal cells may have more undifferentiated characteristics that are different from retinal cells at other sites.

Isenção de responsabilidade: Este resumo foi traduzido usando ferramentas de inteligência artificial e ainda não foi revisado ou verificado