Identification of Potential Biomarkers in Peripheral Blood Supernatants of South African Patients with Syphilitic and Herpetic Uveitis.

Purpose: To identify potential diagnostic biomarkers for herpetic and syphilitic uveitis.

Methods

Blood samples were collected from 92 uveitis patients. Concentrations of 47 biomarkers were evaluated in unstimulated Quantiferon supernatants using the Luminex platform.

Results

Results showed 11 patients (12%) had herpetic uveitis, 11 (12%) syphilis, 40 (43.5%) other infectious causes, 16 (17.4%) established noninfectious causes and 14 (15.2%) were idiopathic. Biomarker analysis revealed three proteins (Apo-A1, Apo-CIII, CRP) that differed between syphilis and other causes. A three-marker biosignature (CCL4/MIP-1β, Apo-CIII and CRP) separated syphilis from other groups with AUC = 0.83 (95% CI: 0.68-0.98). Apo-CIII and CRP differed between herpetic cases and other groups (p < .05). A three-analyte biosignature (Apo-A1, SAP and CRP) separated the herpetic group from other groups with AUC = 0.79 (95% CI: 0.65-0.93).

Conclusion

We have identified candidate biomarkers with potential to differentiate between herpetic, syphilitic and other causes of uveitis. These results warrant further investigation in larger future studies.