The Relationship Between Cognitive Status and Known Single Nucleotide Polymorphisms in Age-Related Macular...

Area of Science:

• Ophthalmology
• Neuroscience
• Genetics

Background:

• Age-related Macular Degeneration (AMD) is increasingly associated with cognitive impairment.
• Existing literature suggests a higher prevalence of cognitive deficits in AMD patients compared to age-matched controls.
• The genetic underpinnings of this comorbidity remain largely unexplored.

Purpose of the Study:

• To explore the potential association between specific single nucleotide polymorphisms (SNPs) and cognitive status in individuals with AMD.
• To investigate if genetic variations in AMD are linked to differences in cognitive performance.
• To identify potential genetic markers contributing to the co-occurrence of AMD and cognitive impairment.

Main Methods:

• A pilot study involving individuals with AMD (N=21) and controls (N=18).
• Genotyping was performed for SNPs CFHY402H, ARMS2A69S, and FADS1 rs174547.
• Cognitive function was assessed using the Montreal Cognitive Assessment (MoCA).

Main Results:

• Significant differences in cognitive subscale difficulties were observed between AMD and control groups.
• AMD patients struggled with delayed recall, abstraction, and orientation, while controls primarily had difficulty with delayed recall.
• Homozygous carriers of the FADS1 rs174547 SNP exhibited significantly lower MoCA scores compared to heterozygotes or non-carriers.

Conclusions:

• The FADS1 rs174547 SNP may contribute to the comorbidity of visual and cognitive impairment in AMD.
• Poorer cognitive scores in homozygous FADS1 rs174547 carriers with AMD suggest a genetic link.
• Further research is warranted to elucidate the role of FADS1 in AMD-related cognitive decline.