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Prospective Cytokine Profiling in Aqueous Humor Reveals a Proinflammatory Microenvironment in Highly Dense Nuclear
Catharina Latz1, Annika Licht1, Alireza Mirshahi1
1Dardenne Eye Clinic, Bonn, Germany.
Investigative Ophthalmology & Visual Science
|September 17, 2024
Summary
Cytokine levels in aqueous humor differ with cataract severity and lens thickness. Dense nuclear cataracts show elevated CCL2, VEGF-A, IL-8, and CXCL10, indicating inflammation markers.
Area of Science:
- Ophthalmology
- Immunology
- Biochemistry
Background:
- Cataract is a leading cause of vision impairment globally.
- Understanding the intraocular environment's molecular changes is crucial for cataract progression insights.
Purpose of the Study:
- To investigate variations in aqueous humor (AH) cytokine profiles based on cataract type and severity.
- To correlate specific protein levels with cataract grading and lens biometry.
Main Methods:
- Prospective study of 397 patients undergoing cataract surgery.
- Cataract grading using the Lens Opacities Classification System III (LOCS III).
- Multiplex cytokine assay to measure 11 proteins in aqueous humor; statistical analysis including regression and clustering.
Main Results:
- Higher nuclear LOCS grades correlated with increased levels of CCL2, VEGF-A, IL-8, and CXCL10.
- No associations found for cortical or subcapsular cataracts.
- Thicker lenses were linked to elevated CRP, CXCL10, CXCL12, IL-6, IL-8, and VEGF-A.
Conclusions:
- Aqueous humor cytokine profiles vary significantly with cataract grading and lens thickness.
- Elevated levels of specific cytokines (CCL2, VEGF-A, IL-8, CXCL10) are associated with dense nuclear cataracts.
- Findings suggest a link between intraocular inflammation markers and cataract development.
