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      Morphological Observations of the Apical Surface of Chick Retinal Pigment Epithelium

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          Abstract

          Chick embryonic retina was examined in order to investigate morphological changes of the apical portion of retinal pigment epithelial (RPE) cells. Whole retina and RPE sheets were observed by fluorescence microscopy (rhodamine-phalloidin preparation) and transmission electron microscopy. Photoreceptor cells had no inner and outer segments on the 8th day in ovo. The inner segments have been formed on the 15th day and the outer segments on the 19th day. RPE sheets had short and blunt apical processes on the 8th day, elongated and slender ones on the 15th day, and well-developed and melanin-containing processes on the 19th day. RPE of the 19th day had numerous bundles of actin filaments associated with melanin pigments in the basal portion of the apical processes and in the apical cytoplasm. In rhodamine-phalloidin preparations, intense fluorescence was localized in the RPE apical processes and cytoplasm on the 19th day. We concluded that RPE apical processes develop in accordance with the photoreceptor development.

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          Author and article information

          Journal
          ORE
          Ophthalmic Res
          10.1159/issn.0030-3747
          Ophthalmic Research
          S. Karger AG
          0030-3747
          1423-0259
          1989
          1989
          10 December 2009
          : 21
          : 3
          : 191-199
          Affiliations
          Department of Fine Morphology, Institute of Medical Science, University of Tokyo, Japan
          Article
          266807 Ophthalmic Res 1989;21:191–199
          10.1159/000266807
          2779974
          © 1989 S. Karger AG, Basel

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          Pages: 9
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