Immune complexes in the aqueous humor and serum

Area of Science:

• Ophthalmology
• Immunology
• Rheumatology

Background:

• Rheumatoid factor (RF) and immune complexes (ICs) are implicated in various inflammatory conditions.
• Their presence in ocular fluids may indicate intraocular inflammation or autoimmune processes.
• Understanding RF and ICs in ocular diseases can aid in diagnosis and management.

Purpose of the Study:

• To investigate the presence and significance of rheumatoid factor and immune complexes in the aqueous humor of patients with ocular diseases.
• To correlate RF and IC detection with specific ophthalmic conditions.

Main Methods:

• Analysis of aqueous humor and serum samples from patients with various ocular diseases.
• Detection of rheumatoid factor via direct agglutination assay on IgG-coated particles.
• Detection of immune complexes by their inhibition of exogenous RF or C1q binding.

Main Results:

• Rheumatoid factor or inhibitory activity was found in the aqueous humor of 9/11 patients with Fuchs' syndrome.
• Positive results were also observed in patients with endogenous uveitis (5/13) and choroidal melanoma (3/7).
• A high titer of RF was noted in a case of sympathetic ophthalmitis following accidental eye perforation. No activity was detected in cataract patients.

Conclusions:

• Rheumatoid factor and immune complexes are present in the aqueous humor of patients with specific ocular inflammatory diseases, notably Fuchs' syndrome.
• These findings suggest a potential role for immune mechanisms in the pathogenesis of these conditions.
• Further research is warranted to explore the diagnostic and therapeutic implications of RF and ICs in ophthalmology.