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Gradual morphogenesis of retinal neurons in the peripheral retinal margin of adult monkeys and humans
Author(s) -
MartínezNavarrete Gema C.,
Angulo Antonia,
MartínNieto José,
Cuenca Nicolás
Publication year - 2008
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.21860
Subject(s) - retinal , neurogenesis , biology , retina , neuroscience , progenitor cell , morphogenesis , anatomy , microbiology and biotechnology , muller glia , cell type , stem cell , cell , genetics , biochemistry , gene
The adult mammalian retina has for long been considered to lack a neurogenerative capacity. However, retinal stem/progenitor cells, which can originate retinal neurons in vitro, have been recently reported in the ciliary body of adult mammals. Here we explored the possibility of retinal neurogenesis occurring in vivo in adult monkeys and humans. We found the presence of cells expressing molecular markers of neural and retinal progenitors in the nonlaminated retinal margin and ciliary body pars plana of mature primates. By means of immunohistochemistry and electron microscopy we also observed photoreceptors and other retinal cell types in different stages of morphological differentiation along the peripheral retinal margin. These findings allow us to extend to primates the idea of neurogenesis aimed at retinal cell turnover throughout life. J. Comp. Neurol. 511:557–580, 2008. © 2008 Wiley‐Liss, Inc.