Elevated interleukin-10 levels in patients with ocular toxoplasmosis

Area of Science:

• Ophthalmology
• Immunology
• Infectious Diseases

Background:

• Ocular toxoplasmosis and ocular lymphoma are common causes of uveitis in elderly individuals.
• Distinguishing between these conditions is crucial for appropriate treatment.
• Elevated interleukin-10 (IL-10) and an IL-10/IL-6 ratio > 1 are indicative of ocular lymphoma.

Purpose of the Study:

• To investigate the cytokine profiles in elderly patients diagnosed with ocular toxoplasmosis.
• To determine if ocular toxoplasmosis can present with cytokine levels similar to those seen in ocular lymphoma.

Main Methods:

• Analysis of aqueous humor samples from patients with suspected uveitis.
• Measurement of interleukin-10 (IL-10) and interleukin-6 (IL-6) levels.
• Differential diagnosis based on clinical presentation and laboratory findings.

Main Results:

• Four cases of ocular toxoplasmosis were identified in elderly patients.
• These patients exhibited high levels of IL-10 and an IL-10/IL-6 ratio > 1.
• These cytokine profiles are typically associated with ocular lymphoma.

Conclusions:

• Ocular toxoplasmosis in the elderly can be associated with elevated aqueous humor IL-10 levels and an IL-10/IL-6 ratio > 1.
• This cytokine profile may lead to misdiagnosis, initially suggesting ocular lymphoma.
• Increased cytokine levels in aqueous humor should be considered in the differential diagnosis of uveitis in older adults.