rs114465579 (LINC01933): AMD and VLDL Lipoproteins
Key takeaways
- rs114465579 sits in LINC01933, a noncoding RNA gene, studied in connection with blood lipid profiles and macular degeneration
- Very small VLDL lipoproteins appear to have a causal role in AMD, not just a correlation, based on Mendelian randomization in 98,316 UK Biobank participants
- 84 of 325 tested blood metabolites were significantly linked to AMD in over 72,000 participants, with lipoproteins the most common category
- Age remains the dominant AMD risk factor; metabolites including lipoproteins contribute a smaller but measurable role
- Evidence is based on a single large study from a European cohort, without independent replication reported
Key takeaways
- rs114465579 sits in LINC01933, a noncoding RNA gene, studied in connection with blood lipid profiles and macular degeneration
- Very small VLDL lipoproteins appear to have a causal role in AMD, not just a correlation, based on Mendelian randomization in 98,316 UK Biobank participants
- 84 of 325 tested blood metabolites were significantly linked to AMD in over 72,000 participants, with lipoproteins the most common category
- Age remains the dominant AMD risk factor; metabolites including lipoproteins contribute a smaller but measurable role
- Evidence is based on a single large study from a European cohort, without independent replication reported
What the research says A 2024 analysis of 325 blood metabolites in 98,316 European UK Biobank participants identified 84 metabolic markers significantly associated with age-related macular degeneration (AMD, the leading cause of irreversible vision loss in adults over 50) after false discovery rate correction (FDR-adjusted P < 0.05), with lipoprotein subclasses, fat-protein particles that transport lipids in the bloodstream, accounting for 39% of the AMD-associated metabolites. Using Mendelian randomization, a method that treats genetic variants as natural experiments to test whether an association reflects causation rather than correlation, 19 metabolites were found to have a likely causal role in AMD, prominently including six very small low-density lipoprotein (VLDL) subclasses and the phospholipids-to-total-lipid ratio in medium VLDL. Age was identified as the primary predictive factor for AMD, with metabolites adding a smaller but statistically significant incremental contribution.
Reported associations
- Age-related macular degeneration (AMD): 84 blood metabolites significantly associated with AMD (FDR-adjusted P < 0.05) identified across 72,376 UK Biobank donors including 1,353 AMD cases and 71,023 controls
- Very small VLDL depletion - likely causal for AMD: Six very small VLDL-containing lipoprotein subclasses and phospholipids-to-total-lipid ratio in medium VLDL identified as having a likely causal contribution to the disease via Mendelian randomization
- Lipoprotein subclass dominance among AMD-associated metabolites: Lipoproteins comprised 39% of AMD-associated metabolites, the single largest category among 325 metabolites tested
Evidence quality The study analyzed 98,316 European participants from the UK Biobank for metabolite GWAS and 72,376 donors for AMD association analysis, representing a large and well-powered dataset. A false discovery rate correction (FDR-adjusted P < 0.05) was applied across 325 metabolites to minimize false positives, and Mendelian randomization was used to support causal inference beyond simple association. The authors describe causal conclusions as "likely" rather than definitive, which is standard caution for Mendelian randomization studies. Participants were restricted to European ancestry, limiting generalizability to other populations. No independent replication cohort is described in the available study text, and findings should be considered preliminary. Age was identified as the dominant AMD risk predictor in the machine learning classifier, with metabolites making a smaller incremental contribution.
Lifestyle considerations No lifestyle considerations on file for this variant.
Frequently asked questions
What is LINC01933?
LINC01933 is a long intergenic non-coding RNA gene, meaning it produces RNA molecules but does not code for protein. Non-coding RNAs may play regulatory roles in gene expression, though the specific function of LINC01933 is not detailed in the available research on this variant.
What is rs114465579?
rs114465579 is a single nucleotide polymorphism (SNP), a position in the genome where people can carry different DNA letters. This variant is located in or near the LINC01933 gene and was investigated in the context of a large metabolite genome-wide association study.
What is age-related macular degeneration?
Age-related macular degeneration (AMD) is the leading cause of irreversible central vision loss in adults over 50. It involves deterioration of the macula, the central part of the retina, and features lipid-rich deposits called drusen as an early hallmark of the condition.
Are lipids causally connected to macular degeneration?
A large UK Biobank study using Mendelian randomization found that very small VLDL lipoprotein subclasses likely have a causal role in AMD development, not merely a statistical correlation. Lipoprotein subclasses made up 39% of all metabolites significantly associated with AMD in that study.
How reliable is the evidence linking this variant to AMD?
Evidence comes from a single large study of 98,316 participants that applied strict statistical corrections and Mendelian randomization to support causal inference. However, participants were of European ancestry only, and independent replication has not been described in the available study text, so findings are considered preliminary.