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Updated: Jun 10, 2026

Induction of Ocular Surface Inflammation and Collection of Involved Tissues
Published on: August 4, 2022
Resolution, the grail for healthy ocular inflammation
1Vision Science Program, School of Optometry, University of California, 594 Minor Hall, MC 2020, Berkeley, CA 94720, USA. kgronert@berkeley.edu
Abstract:
Acute inflammation is a frequent, essential and beneficial response to maintain normal tissue function. PMN are the primary effector cells of acute inflammatory responses and their timely resolution by macrophages from an injured, stressed or infected tissues are required for the successful execution of this routine tissue response. Dysregulation of this fundamental program is a major factor in the global disease burden and contributes to many ocular diseases. Counter-regulatory signals are critical to the controlled activation of innate and adaptive immune responses in the eye and recent studies have identified two circuits in the cornea, uvea and/or retina, namely 15-lipoxygenase and heme-oxygenase, which control inflammation, promote resolution of PMN and afford neuroprotection. The role of these counter-regulator and pro-resolution circuits may provide insight into ocular inflammatory diseases and opportunities to restore stressed ocular tissue to a pre-inflammatory state, namely homeostasis, rather than limiting therapeutic options to palliative inhibition of pro-inflammatory circuits.
Insights
Acute inflammation is essential, but its dysregulation causes disease. New research identifies key signaling pathways that control inflammation and promote healing in the eye, offering new therapeutic avenues.
Area of Science:
- Ophthalmology
- Immunology
- Molecular Biology
Background:
- Acute inflammation is vital for tissue repair but its dysregulation contributes to significant disease burden, including ocular conditions.
- Polymorphonuclear leukocytes (PMN) are key effector cells in acute inflammation, requiring timely resolution by macrophages.
- Ocular inflammatory diseases often stem from dysregulated inflammatory responses.
Purpose of the Study:
- To investigate counter-regulatory and pro-resolution signaling circuits in ocular tissues.
- To understand the role of 15-lipoxygenase and heme-oxygenase pathways in controlling ocular inflammation.
- To explore therapeutic opportunities for restoring ocular tissue homeostasis.
Main Methods:
- Analysis of inflammatory and resolution circuits in cornea, uvea, and retina.
- Identification of key molecular pathways involved in immune cell regulation.
- Investigation of neuroprotective effects of identified circuits.
Main Results:
- Two specific signaling circuits, 15-lipoxygenase and heme-oxygenase, were identified in ocular tissues.
- These circuits effectively control inflammation, promote PMN resolution, and provide neuroprotection.
- Dysregulation of these pathways is linked to ocular inflammatory diseases.
Conclusions:
- The identified 15-lipoxygenase and heme-oxygenase circuits are critical for resolving ocular inflammation and maintaining tissue homeostasis.
- Targeting these pro-resolution pathways offers a promising strategy for treating ocular inflammatory diseases.
- Restoring ocular tissue to a pre-inflammatory state is a viable therapeutic goal beyond simple anti-inflammatory inhibition.
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