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Related Concept Videos

Anatomy of the Eyeball01:20

Anatomy of the Eyeball

The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
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The Retina01:32

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Updated: May 12, 2026

3D Visualization of Retinal Vascular Pericytes in Mice by Immunostaining
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Published on: November 1, 2024

Pericytes in the eye.

Frederick Pfister1, Ewa Przybyt, Martin C Harmsen

  • 1Institute of Pathology, University Hospital Mannheim, Mannheim Medical Faculty, Ruprechts-Karls-University Heidelberg, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany. frederick.pfister@umm.de

Pflugers Archiv : European Journal of Physiology
|April 10, 2013
PubMed
Summary

Retinal pericytes are unique cells crucial for the neurovascular unit. Research highlights their diverse origins and functions, offering insights into retinal diseases.

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Cell Biology

Background:

  • Retinal pericytes are distinct from those in other organs due to their high density and critical role in the neurovascular unit.
  • Their varied origins and lack of a single identifying marker suggest functional diversity within the retinal pericyte population.

Purpose of the Study:

  • To explore the functional plurality and unique characteristics of retinal pericytes.
  • To understand factors influencing pericyte recruitment, adhesion, and homeostasis.
  • To investigate the role of pericytes in retinal disease, particularly in the context of the neurovascular unit.

Main Methods:

  • Identification of novel factors like notch-3 and angptl-4 involved in pericyte regulation.
  • Examination of the neuroglia's influence on pericyte survival and motility.
  • Utilizing non-diabetic animal models to study neurovascular unit dysfunction.

Main Results:

  • Recent discoveries have identified key regulators (notch-3, angptl-4) of pericyte recruitment and homeostasis.
  • The neurovascular unit's role in pericyte survival and motility, especially under disease conditions, is increasingly recognized.
  • Pericyte dropout is a feature of diabetic retinopathy, prompting investigation using other models.

Conclusions:

  • Retinal pericytes possess unique characteristics and functional diversity.
  • Understanding pericyte regulation and their role in the neurovascular unit is vital for addressing retinal diseases.
  • Non-diabetic models are valuable for elucidating mechanisms of neurovascular unit dysfunction.