Vascular function and ocular involvement in sarcoidosis

Area of Science:

• Ophthalmology
• Cardiology
• Rheumatology

Background:

• Sarcoidosis frequently affects the eyes, primarily as uveitis.
• The underlying mechanisms linking ocular sarcoidosis to systemic vascular health require further investigation.

Purpose of the Study:

• To investigate the association between ocular sarcoidosis and vascular impairment.
• To evaluate endothelial function and arterial stiffness in sarcoidosis patients with and without ocular involvement.

Main Methods:

• Compared 82 sarcoidosis patients (ocular vs. non-ocular) and 77 controls.
• Assessed endothelial function using flow-mediated dilation (FMD).
• Measured arterial stiffness via pulse wave velocity (PWV) and augmentation index (AIx).

Main Results:

• Ocular sarcoidosis patients exhibited significantly impaired FMD, increased AIx, and elevated PWV compared to controls and non-ocular sarcoidosis patients.
• Impaired FMD was independently associated with a higher likelihood of ocular involvement (OR=1.69, p=0.001).
• ROC analysis indicated FMD has significant diagnostic ability for ocular sarcoidosis (AUC=0.77, sensitivity=79%, specificity=68% at <6.00% FMD).

Conclusions:

• Ocular involvement in sarcoidosis is associated with endothelial dysfunction and increased arterial stiffness.
• Findings support a vascular theory for uveitis in sarcoidosis.
• Endothelial function tests may hold clinical importance for managing ocular sarcoidosis.