Expressive

rs12280753 (BUD13): Blood Lipid and Cardiac Expression

Key takeaways

  • The alternate allele is linked to higher APOA1 (apolipoprotein A1) expression in heart muscle, including both the left ventricle and atrial appendage.
  • This variant is located near the BUD13 gene and LINC02702 non-coding RNA, in a region studied in blood lipid genetics research.
  • The same allele increases BUD13 expression in whole blood, affecting an RNA-processing gene.
  • ZPR1 expression is reduced in fat, skin, and cultured fibroblasts, pointing to effects across multiple tissue types.
  • Direct disease-level associations for this specific variant are not explicitly stated in the available study excerpts; evidence is preliminary.

Key takeaways

  • The alternate allele is linked to higher APOA1 (apolipoprotein A1) expression in heart muscle, including both the left ventricle and atrial appendage.
  • This variant is located near the BUD13 gene and LINC02702 non-coding RNA, in a region studied in blood lipid genetics research.
  • The same allele increases BUD13 expression in whole blood, affecting an RNA-processing gene.
  • ZPR1 expression is reduced in fat, skin, and cultured fibroblasts, pointing to effects across multiple tissue types.
  • Direct disease-level associations for this specific variant are not explicitly stated in the available study excerpts; evidence is preliminary.

What the research says A 2021 lipidomics genome-wide association study (GWAS) profiled individual blood lipid metabolites using high-resolution mass spectrometry in 5,662 South Asian participants from the Pakistan Risk of Myocardial Infarction Study and in 13,814 healthy British blood donors, identifying 253 and 502 genetic associations with lipid species respectively across multiple cardiometabolic loci. A 2011 longitudinal GWAS of cardiovascular disease risk factors followed 525 European-ancestry participants from childhood through adulthood, characterising genetic variants with both age-independent and time-dependent effects on blood lipids, blood pressure, and metabolic traits including LDL and HDL cholesterol, triglycerides, glucose, and insulin. GTEx v11 eQTL (expression quantitative trait locus, meaning a genetic variant associated with gene expression levels) data from 953 donors identifies this variant as influencing APOA1 expression in heart tissue, BUD13 expression in whole blood, and ZPR1 expression in adipose and skin tissues, all at FDR < 0.05 GTEx Portal.

Reported associations

  • Blood lipid metabolites: A 2021 lipidomics GWAS in South Asian (n=5,662) and British (n=13,814) populations identified hundreds of genetic associations with individual lipid species at cardiometabolic disease loci; the provided study text does not explicitly name this variant.
  • Cardiovascular risk factors (longitudinal): A 2011 GWAS tracked LDL and HDL cholesterol, triglycerides, blood pressure, heart rate, glucose, and insulin from childhood to adulthood in 525 participants of European ancestry; the provided text does not explicitly name this variant.

Evidence quality The two supporting studies provide relevant biological context for this locus but neither explicitly names rs12280753 in the available excerpts, and neither includes a PubMed identifier in its metadata, limiting direct inline citation. The lipidomics study (BMC Medicine, 2021) is the larger, with a combined sample of approximately 19,476 participants across two cohorts and cross-cohort comparison for biological validation. The longitudinal study (PLoS Genetics, 2011) has a smaller sample (n=525) but tracked up to 13 repeated phenotypic measurements per participant from childhood through adulthood, offering a distinctive perspective on how traits develop over time. GTEx expression data (953 donors, FDR < 0.05) provides tissue-specific mechanistic evidence, but eQTL associations reflect gene expression regulation rather than disease outcomes. Overall, disease-level evidence for this variant is preliminary; direct replication in independent cohorts is not documented in the available materials.

Tissue-specific expression effects

  • APOA1: The alternate allele is linked to increased APOA1 (apolipoprotein A1) expression in heart left ventricle (log2-scale effect +0.57, p=5.1e-9) and heart atrial appendage (effect +0.39, p=1.8e-6), meaning higher transcript levels of this apolipoprotein in cardiac tissue GTEx Portal.
  • BUD13: The alternate allele is linked to increased BUD13 expression in whole blood (effect +0.21, p=5.9e-7), affecting a gene that encodes a component of the pre-mRNA splicing machinery GTEx Portal.
  • ZPR1: The alternate allele is linked to reduced ZPR1 expression in subcutaneous fat (effect -0.14, p=2.0e-5), sun-exposed skin (effect -0.13, p=1.8e-4), and cultured fibroblasts (effect -0.09, p=3.0e-6), meaning lower levels of this zinc finger protein across connective and metabolic tissue types GTEx Portal.

Lifestyle considerations No lifestyle considerations on file for this variant.

Frequently asked questions

What is the BUD13 gene?

BUD13 encodes a protein that helps process messenger RNA transcripts before they can be translated into functional proteins. It sits in the same genomic region as the long intergenic non-coding RNA LINC02702 on chromosome 11.

What does rs12280753 do to APOA1 expression in the heart?

According to GTEx expression data, people carrying the alternate allele of rs12280753 tend to have higher APOA1 (apolipoprotein A1) transcript levels in heart muscle, specifically in the left ventricle and atrial appendage. This is a gene expression association, not a direct measure of heart disease risk.

Is rs12280753 associated with cholesterol or lipid levels?

Two genome-wide association studies of blood lipid metabolites and cardiovascular risk factors investigated this genomic region, but the available study excerpts do not report findings for this specific variant by name. The connection between this variant and circulating lipid levels is considered preliminary based on the available materials.

What is ZPR1 and how does this variant affect it?

ZPR1 encodes zinc finger protein ZPR1, which is involved in cellular signaling pathways. GTEx data shows the alternate allele of rs12280753 is linked to lower ZPR1 expression in subcutaneous fat, sun-exposed skin, and cultured fibroblasts.

What is a long intergenic non-coding RNA like LINC02702?

Long intergenic non-coding RNAs are stretches of DNA that are copied into RNA molecules but do not produce proteins. LINC02702 is one such region, located near the BUD13 splicing gene on chromosome 11. Their biological functions often remain incompletely characterised.