Tear Mediators NGF along with IL-13 Predict Keratoconus Progression

Area of Science:

• Ophthalmology
• Immunology
• Biomarker Discovery

Background:

• Keratoconus is a progressive corneal ectasia leading to vision impairment.
• Early detection of keratoconus progression is crucial for timely intervention.
• Current diagnostic methods may not always capture subtle progression dynamics.

Purpose of the Study:

• To identify combinations of immunomediators in tear fluid that can sensitively indicate keratoconus progression.
• To establish predictive biomarkers for monitoring disease advancement.
• To correlate tear mediator levels with objective clinical parameters of keratoconus.

Main Methods:

• Tear samples were collected from 42 keratoconus patients at baseline and after one year.
• Concentrations of 13 tear mediators were quantified using Cytometric Bead Array (CBA).
• Patients were stratified into non-progressive and progressive groups based on Pentacam HR imaging.

Main Results:

• Significant differences in Interferon-gamma (IFNγ), IL-13, IL-17A, CCL5, MMP-13, and Plasminogen Activator Inhibitor-1 (PAI-1) were observed between progressive and non-progressive groups.
• Changes in specific Pentacam parameters correlated with alterations in IFNγ, IL-13, IL-17A, CXCL8, CCL5, TIMP-1, and tissue Plasminogen Activator (t-PA).
• A combination of tear IL-13 and NGF demonstrated 80% sensitivity and 100% specificity in predicting keratoconus progression.

Conclusions:

• Tear levels of IL-13 and NGF are important predictors of keratoconus progression.
• This longitudinal study highlights the potential of these biomarkers for clinical application.
• Further research may validate these findings for routine diagnostic use in keratoconus management.