Summary
The epithelial cells in the retina of rats were examined by scanning and transmission electron microscopy.
The apical surface of the epithelial cells is covered by a large number of microvilli, which are embedded in an extracellular material. Distinct holes remaining after detached photoreceptor cell segments are numerous. The cells are polyhedronal, usually hexagonal and holes are scattered in their plasma membrane. Many of the epithelial cells are binucleated. The borders between adjacent cells are always close to each other. Numerous cytoplasmic folds or foot processes occur at the base of the cells as well as an extracellular space.
The characteristic surface structures are discussed in relation to the function of the retinal epithelial cells.
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References
Bairati, A., Jr., Orzalesi, N.: The ultrastructure of the pigment epithelium and the photoreceptor-pigment epithelium junction in the human retina. J. Ultrastruct. Res. 9, 484–496 (1963).
Barber, V. C., Boyde, A.: Scanning electron microscopic studies of cilia. Z. Zellforsch. 84, 269–284 (1968).
Boyde, A., James, D. W., Tresman, R. L., Willis, R. A.: Outgrowth from chick embryo spinal cord in vitro, studied with the scanning electron microscope. Z. Zellforsch. 90, 1–18 (1968).
Buss, H., Körnert, W.: Structure of the rat renal glomerulus. Scanning electron microscopic study. Virchows Arch. Abt. B, Zellpath. 4, 79–92 (1969).
Dowling, J. E., Gibbons, I. R.: The fine structure of the pigment epithelium in the albino rat. J. Cell Biol. 14, 459–474 (1962).
Fine, B. S.: Limiting membranes of the sensory retina and pigment epithelium. Arch. Ophthal. 66, 847–860 (1961).
Karnovsky, M. J.: A formaldehyde glutaraldehyde fixative of high osmolarity for use in electron microscopy. J. Cell Biol. 27, 137 A (1965).
Matsusaka, T.: The intracytoplasmic channel in pigment epithelial cells of the chick retina. Z. Zellforsch. 81, 100–113 (1967).
Meier-Ruge, W.: The patho-physiological morphology of the pigment epithelium and its importance for retinal structures and functions. Mod. Probl. Ophthal. 8, 32–48 (1968).
Rohen, J. W.: Das Auge und seine Hilfsorgane. In: Handbuch der mikroskopischen Anatomie des Menschen, hrsg. by W. Bargmann, Bd. 3/4. Berlin-Göttingen-Heidelberg-New York: Springer 1964
Ts'o, M. O. M., Friedman, E.: The retinal pigment epithelium. Arch. Opthal. 78, 641–649, 1967.
Young, R. W., Bok, D.: Participation of the retinal pigment epithelium in the rod outer segment renewal process. J. Cell Biol. 42, 392–403 (1969).
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Supported by grants from the Swedish Medical Research Council (B70-12X-2543-02) and “Riksföreningen mot Cancer (69∶171, 265-B69-01X)”.
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Hansson, HA. Ultrastructure of the surface of the epithelial cells in the rat retina. Z. Zellforsch. 105, 242–251 (1970). https://doi.org/10.1007/BF00335474
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DOI: https://doi.org/10.1007/BF00335474