Is there a relationship between hematological inflammatory parameters and age-related macular degeneration?

Area of Science:

• Ophthalmology
• Immunology
• Biochemistry

Background:

• Age-related macular degeneration (AMD) is a leading cause of vision loss in older adults.
• Inflammation is increasingly recognized as a key factor in the pathogenesis of AMD.
• Biomarkers of systemic inflammation may offer insights into AMD development and progression.

Purpose of the Study:

• To investigate and compare blood inflammation parameters in patients with dry-type AMD, wet-type AMD, and healthy controls.
• To determine the diagnostic potential of specific inflammatory ratios in differentiating AMD subtypes.

Main Methods:

• A retrospective analysis of laboratory and demographic data from 60 wet-type AMD patients, 60 dry-type AMD patients, and 71 healthy controls.
• Calculation of neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), and monocyte-to-lymphocyte ratio (MLR).
• Receiver operating characteristic (ROC) curve analysis to assess the diagnostic accuracy of NLR and MLR for wet-type AMD.

Main Results:

• NLR was significantly higher in wet-type AMD (3.90) and dry-type AMD (2.26) compared to controls (1.84) (p < 0.001).
• MLR was significantly elevated in wet-type AMD (0.47) and dry-type AMD (0.30) versus controls (0.28) (p < 0.001).
• PLR did not show significant differences between groups (p = 0.101). ROC analysis indicated high AUC for NLR (0.920) and moderate AUC for MLR (0.717) in distinguishing wet-type AMD.

Conclusions:

• Elevated NLR and MLR are associated with AMD, particularly the wet type.
• These simple blood inflammatory markers may indicate subclinical, low-grade inflammation in wet-type AMD.
• NLR and MLR show potential as non-invasive biomarkers for identifying patients with wet-type AMD.