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Corneal immune cell morphometry as an indicator of local and systemic pathology: A review
Holly R Chinnery1, Xin Yuan Zhang1, Ching Yi Wu1
1Department of Optometry and Vision Sciences, University of Melbourne, Parkville, Victoria, Australia.
Insights
Corneal dendritic cells (DCs) are immune cells in the eye. Their shape, not just number, offers insights into eye inflammation and nervous system health, using advanced imaging techniques.
Area of Science:
- Ophthalmology
- Immunology
- Cell Biology
Background:
- The corneal epithelium hosts resident immune cells known as dendritic cells (DCs) or Langerhans cells.
- Corneal DCs are uniquely visualizable in vivo using confocal microscopy due to the cornea's transparency.
- Research interest has grown in corneal DC involvement in ocular and systemic diseases.
Purpose of the Study:
- To review methodologies for classifying and measuring corneal DC morphology.
- To discuss the relationship between corneal DC morphology and inflammatory conditions.
- To explore the link between corneal DC morphology and peripheral nervous system health.
Main Methods:
- In vivo confocal microscopy for visualizing corneal DCs.
- Morphological classification and measurement techniques for DCs.
- Comparative analysis across human and rodent models.
Main Results:
- Corneal DC number has been a traditional focus, but morphology is emerging as a key indicator.
- DC morphology provides insights into the inflammatory status of the cornea.
- Changes in DC morphology may correlate with peripheral nervous system health.
Conclusions:
- Corneal DC morphology is a valuable metric for assessing ocular and systemic inflammatory states.
- Advanced imaging and analysis of DC morphology offer new diagnostic potential.
- Understanding corneal DC morphology enhances knowledge of eye immunity and neurological health.
Abstract:
The corneal epithelium contains a population of resident immune cells commonly referred to as dendritic cells (DCs), or Langerhans cells. A unique advantage of the transparent cornea being situated at the surface of the eye is that these cells can be readily visualised using in vivo confocal microscopy. Over the past decade, interest in the involvement of corneal DCs in a range of ocular and systemic diseases has surged. For most studies, the number of corneal DCs has been the main outcome of interest. However, more recently attention has shifted towards understanding how DC morphology may provide insights into the inflammatory status of the cornea, and in some cases, the health of the peripheral nervous system. In this review, we provide examples of recent methodologies that have been used to classify and measure corneal DC morphology and discuss how this relates to local and systemic inflammatory conditions in humans and rodents.
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