rs12221386 (LHPP): Plasma Metabolite GWAS Variant

Key takeaways

• rs12221386 is located near the LHPP gene, which encodes phospholysine phosphohistidine inorganic pyrophosphate phosphatase, an enzyme involved in phosphate processing.
• It was identified in a genome-wide association study (GWAS) of 217 plasma metabolites conducted in 2,076 participants from the Framingham Heart Study (FHS) Offspring Cohort.
• The study found 31 genetic loci associated with metabolite levels, of which 23 were novel discoveries at the time of publication.
• For the majority of metabolites measured, inherited genetic factors explained more inter-individual variation than measured clinical factors such as age, sex, body mass index, and smoking status.

What the research says A GWAS of 217 plasma metabolites - spanning both polar analytes and lipid analytes - was performed using a liquid chromatography-mass spectrometry (LC-MS) platform in 2,076 participants of the FHS Offspring Cohort, including 873 sibships with a mean age of 55 years. Thirty-one genetic loci were associated with plasma metabolite levels at genome-wide significance, 23 of which had not been previously reported. Estimated heritability (the proportion of inter-individual variation attributable to inherited factors) exceeded 20% for 66% of all metabolites assayed, while measured clinical factors remained at or below 20% for 93% of metabolites.

Reported associations

• Plasma metabolite levels: rs12221386, in the region of the LHPP gene, was identified within a GWAS of 217 plasma metabolites in the Framingham Heart Study (n=2,076). The specific metabolite or metabolites linked to this variant at genome-wide significance are not named in the provided study excerpt; the full study reports 31 associated loci across the dataset.

Evidence quality The association data originate from a single GWAS conducted in 2,076 participants of the FHS Offspring Cohort, a community-based sample. The study used a sensitive LC-MS metabolomics platform covering 217 analytes, including more than 100 not measured in prior GWAS at the time of publication. While 31 loci met genome-wide significance thresholds, the provided study excerpt does not include variant-level statistics such as the specific metabolite associated with rs12221386, its effect size, or its p-value. A sample size of n=2,076 is modest relative to more recent metabolomics GWAS efforts that recruit tens of thousands of participants, and the provided text does not describe independent replication for individual loci. Evidence for this specific variant should therefore be considered preliminary pending confirmation in larger, independent cohorts.

Lifestyle considerations No lifestyle considerations on file for this variant.