rs12031785 (LYPLAL1-AS1): Hernia and Metabolic Variant
Key takeaways
- rs12031785 sits at the LYPLAL1-AS1 locus and has been identified in large genome-wide studies for both hernia risk and circulating metabolites
- A hernia GWAS of 367,394 individuals placed this locus among 57 newly discovered hernia-risk regions at genome-wide significance
- Polygenic risk scores including this locus predicted hernia development and repeat surgery in an independent sample of 82,064 people
- The alternate allele reduces LYPLAL1-AS1 expression in kidney and skin but increases it in adrenal gland tissue
- Both lines of evidence come from UK Biobank and the variant has not been described as independently replicated in the provided research
Key takeaways
- rs12031785 sits at the LYPLAL1-AS1 locus and has been identified in two large UK Biobank genome-wide studies: one examining circulating metabolites and one examining abdominal wall hernia risk
- A hernia GWAS of 367,394 individuals placed this locus among 57 newly discovered hernia-risk regions at genome-wide significance
- Polygenic risk scores incorporating this and other hernia-associated loci predicted hernia development and repeat hernia surgery in a separate sample of 82,064 individuals
- The alternate allele is linked to reduced LYPLAL1-AS1 expression in kidney and skin tissue, and increased expression in adrenal gland tissue
- Both sets of evidence come from a single large biobank, and this specific variant has not been described as externally replicated in the provided sources
What the research says rs12031785 maps to the LYPLAL1-AS1 locus on chromosome 1. A genome-wide metabolomics study covering 249 circulating small molecule and lipoprotein traits in roughly 450,000 UK Biobank participants across three ancestries identified this region among 753 significant genomic loci at a metabolome-adjusted significance threshold of P < 2.0 x 10^-10. A separate GWAS of 367,394 UK Biobank subjects examining abdominal wall hernia subtypes identified this locus among 57 novel hernia-risk loci, with eQTL (expression quantitative trait locus - a statistical link between a genetic variant and gene expression levels) analysis identifying differential expression of 145 genes across hernia-associated loci.
Reported associations
- Circulating metabolites (NMR-measured): This locus maps to one of 753 genomic regions significantly associated with circulating small molecules or lipoprotein characteristics across approximately 450,000 UK Biobank participants analyzed by proton nuclear magnetic resonance (NMR) spectroscopy; specific metabolite identities at this locus are not described in the provided study text
- Abdominal wall hernia (primarily inguinal hernia): Identified among 57 novel genome-wide significant loci (P < 5 x 10^-8) in a GWAS of 367,394 UK Biobank subjects; hernia heritability in that study was estimated at h2 = 0.12 for inguinal, 0.06 for femoral, 0.16 for umbilical, and 0.07 for ventral subtypes
- Polygenic risk score for hernia: In an independent validation sample of 82,064 individuals, higher genetic risk score deciles were significantly associated with hernia development (P = 3.33 x 10^-10) and recurrent hernia repair surgery (P = 3.64 x 10^-10)
Evidence quality Both associations reach established genome-wide significance thresholds in studies of 367,000 to 450,000 UK Biobank participants. The metabolomics study applied a stricter metabolome-adjusted threshold (P < 2.0 x 10^-10) and included trans-ancestral meta-analysis across British White European, British African, and British Central/South Asian participants, providing broader ancestry representation. The hernia GWAS confirmed all four previously reported hernia loci before adding 57 novel ones, and validated its polygenic risk score in a separate replication sample of 82,064 individuals. Neither source document describes independent external replication of rs12031785 specifically outside UK Biobank. Hernia heritability estimates are modest (h2 = 0.06-0.16 across subtypes), meaning common genetic variants collectively explain only a fraction of total hernia risk, and this single locus would account for an even smaller portion. The metabolomics study authors acknowledge the persistent challenge of confidently assigning effector genes at newly identified loci.
Tissue-specific expression effects
- LYPLAL1-AS1: The alternate allele is associated with reduced expression in kidney cortex and in both sun-exposed (lower leg) and non-sun-exposed (suprapubic) skin, and with increased expression in adrenal gland tissue; these are molecular-level eQTL associations describing a potential mechanism rather than predicting clinical outcomes GTEx Portal
Lifestyle considerations No lifestyle considerations on file for this variant.
Frequently asked questions
What is the LYPLAL1-AS1 gene?
LYPLAL1-AS1 is a gene on chromosome 1 whose expression is regulated by nearby genetic variants including rs12031785. Research shows the alternate allele at this position changes how much LYPLAL1-AS1 is expressed in tissues such as kidney, skin, and adrenal gland.
Is rs12031785 linked to hernia risk?
Yes. A genome-wide association study of 367,394 UK Biobank participants identified this locus among 57 newly discovered hernia-risk regions at genome-wide significance. Polygenic risk scores that included this and other hernia loci also predicted hernia recurrence after surgery in an independent sample of 82,064 individuals.
What metabolic traits is rs12031785 associated with?
A large metabolomics study of approximately 450,000 UK Biobank participants identified this locus among 753 regions associated with circulating small molecules and lipoprotein characteristics measured by NMR spectroscopy. The specific metabolites linked to this locus are not detailed in the available study text.
How does rs12031785 affect gene expression?
According to GTEx data, the alternate allele is associated with reduced LYPLAL1-AS1 expression in kidney cortex and in both sun-exposed and non-sun-exposed skin, while the same allele is associated with increased expression in adrenal gland tissue. These are molecular-level associations and do not directly predict health outcomes.
How reliable is the evidence for rs12031785?
Both associations come from large UK Biobank studies with hundreds of thousands of participants, reaching standard genome-wide significance thresholds. However, the provided research does not describe replication of this specific variant in independent cohorts outside UK Biobank. Hernia heritability estimates are modest, meaning this variant explains only a small fraction of overall hernia risk.