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Corneal Endothelium: Applied Anatomy

  • Francisco Arnalich-Montiel
Chapter
Part of the Essentials in Ophthalmology book series (ESSENTIALS)

Abstract

Corneal endothelium is derived from the neural crest, and it is the innermost layer of the cornea. It consists on a monolayer of flat cells on an amorphous collagenous membrane, Descemet’s membrane. It functions as a permeability barrier and as an active pump to generate an osmotic gradient to keep the relative stromal deturgescence (78% water content) required for corneal transparency and also participates in the synthesis of Descemet’s membrane. At birth there are over 3000 cells/mm2 that tend to decline with aging at approximately 0.6% pace reduction during the adult period. Nevertheless, a minimal numerical density of 400–500 cells/mm2 is required to sustain the pumping activity of the endothelium. Zonula occludens-1 (ZO-1), aquaporin 1, Na+/K+ pump, and neuron-specific enolase are classic markers of endothelial cells. Expression of these proteins is not unique of corneal endothelium, but the pattern subcellular distribution using these and other proteins such as N-cadherin, NCAM, integrin α3ß1, or the actin/myosin network can be used to distinguish these cells from the other corneal cell types. Specific identification of these cells is highly important to select culture subpopulation for cell therapies.

Keywords

Corneal endothelium Corneal endothelium anatomy Corneal endothelium physiology Corneal endothelium immunohistochemistry 

Notes

Compliance with Ethical Requirements

Francisco Arnalich-Montiel declares no conflict of interest. No human or animal studies were carried out by the author for this article.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Francisco Arnalich-Montiel
    • 1
  1. 1.Vissum CorporationMadridSpain

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