Objective:

To investigate the association between serum HDL levels and the risk of age-related macular degeneration (AMD), and to identify genetic variants linked to this risk.

Approach:

Key Findings:

• A U-shaped association was found between HDL levels and AMD risk, with lowest risk at HDL levels between 40 and 60 mg/dL.
• Both low and high HDL levels were significantly associated with increased AMD risk (P<.001).
• Specific SNPs (CFH, ARMS2, ABCA1, LIPC, LPA) were identified as significantly associated with AMD susceptibility.

Interpretation:

Elevated HDL may contribute to drusen formation in AMD through local aggregation in Bruch’s membrane, leading to inflammation and oxidative stress.

Limitations:

• Retrospective study design limited AMD severity classification.
• Subgroup analysis by disease stage was not performed due to missing data in 34% of cases.
• Serum Lp(a) levels could not be assessed due to data sparsity.

Conclusion:

Further research is needed to clarify the mechanisms by which both low and high HDL levels influence AMD pathogenesis and to explore the role of Lp(a) in drusenogenesis.

Sources:

• Ophthalmology Journal
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