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Published on: July 14, 2016
Analysis of major alleles associated with age-related macular degeneration in patients with multifocal choroiditis:
Daniela C Ferrara1, Joanna E Merriam, K Bailey Freund
1LuEsther T. Mertz Retinal Research Center, New York, New York, USA.
Objective:
To analyze the frequency of major age-related macular degeneration (AMD)-associated alleles in patients with multifocal choroiditis (MFC).
Methods:
A cohort of 48 patients with MFC was compared with previously characterized cohorts of patients with advanced AMD (368 samples) and matched unaffected controls (368 samples). Allele and genotype frequencies of single nucleotide polymorphisms for the following AMD-associated alleles were evaluated: risk alleles in complement factor H (CFH) gene (Y402H and IVS14) and LOC387715/HTRA1 gene on 10q26 (A69S) and protective alleles in CFH (IVS1, IVS6, and delCFHR1-3) and complement factor B loci (H9L and R32Q).
Results:
Frequencies of all major AMD-associated alleles in the CFH locus indicate a strong, statistically significant association of CFH gene single nucleotide polymorphisms and MFC. However, the same analysis for the single nucleotide polymorphisms in complement factor B and 10q26 loci matched the results in the control group.
Conclusions:
Like AMD, the MFC phenotype is strongly associated with the major alleles/haplotypes in the CFH locus. Clinical Relevance We report compelling evidence of a strong association between CFH polymorphisms and MFC, which contributes to the understanding of MFC pathogenesis and suggests new potential therapeutic targets.
Insights
Multifocal choroiditis (MFC) shares a strong genetic link with age-related macular degeneration (AMD), specifically involving the complement factor H (CFH) gene. This finding offers new insights into MFC
Area of Science:
- Ophthalmology
- Genetics
- Immunology
Background:
- Age-related macular degeneration (AMD) is a leading cause of vision loss.
- Multifocal choroiditis (MFC) is an inflammatory eye condition with overlapping clinical features with AMD.
- Genetic factors play a significant role in the pathogenesis of both AMD and other ocular inflammatory diseases.
Purpose of the Study:
- To investigate the association between major age-related macular degeneration (AMD)-associated genetic variants and multifocal choroiditis (MFC).
- To compare the frequencies of specific AMD-associated alleles in patients with MFC against AMD patients and healthy controls.
Main Methods:
- A cohort of 48 MFC patients was analyzed.
- Genetic analysis focused on single nucleotide polymorphisms (SNPs) in complement factor H (CFH), LOC387715/HTRA1, and complement factor B (CFB) genes.
- Allele and genotype frequencies were compared with previously established cohorts of advanced AMD patients and matched controls.
Main Results:
- A statistically significant association was found between major AMD-associated alleles in the CFH locus and MFC.
- No significant association was observed for SNPs in the complement factor B and 10q26 loci when comparing MFC patients to controls.
- The findings indicate a specific genetic link between CFH polymorphisms and the development of MFC.
Conclusions:
- The MFC phenotype demonstrates a strong association with major alleles/haplotypes in the CFH locus, similar to AMD.
- These results provide compelling evidence for the role of CFH gene polymorphisms in MFC pathogenesis.
- Identifying these genetic associations may lead to novel therapeutic targets for MFC.
