rs10437653 (LINC02489): Birth Weight Variant

Key takeaways

• rs10437653 sits near LINC02489 (a long intergenic non-coding RNA gene, meaning it produces regulatory RNA but not protein) and was identified as one of 190 genome-wide significant birth weight signals in a meta-analysis of over 321,000 individuals.
• The variant reduces LINC02489 expression in the pituitary gland and alters expression of genes in blood, skin, esophagus, and nerve tissue.
• Birth weight associations from this study reflect both direct fetal genetic effects and indirect maternal genetic effects on the intrauterine environment.
• No specific effect size for this variant alone is reported in the available evidence; it is one of many signals in a large multi-signal study.
• No lifestyle interventions or drug responses have been linked to this variant in the available evidence.

What the research says rs10437653 was identified as one of 190 independent genome-wide significant signals (meaning they cleared a stringent statistical threshold of p<6.6x10-9 designed to limit false discoveries) in a large meta-analysis - a study combining results across many cohorts - of fetal birth weight using data from 321,223 individuals and maternal data from 230,069 mothers; that study applied structural equation modeling, a technique for teasing apart overlapping genetic contributions, to partition direct fetal genetic effects from indirect maternal genetic effects on birth weight. The same study used Mendelian randomization - which treats inherited genetic variants as natural experiments to test causal claims - and found that the inverse relationship between lower birth weight and higher adult blood pressure is attributable to shared genetic factors rather than intrauterine programming of the developing fetus. At the molecular level, tissue-specific gene expression data show the variant's alternate allele is linked to reduced LINC02489 expression in the pituitary gland and expression changes across at least five additional genes in blood, skin, esophagus, and nerve GTEx Portal.

Reported associations

• Birth weight (fetal analysis): rs10437653 was among 146 independent signals in the fetal GWAS meta-analysis (n=321,223; p<6.6x10-9); specific effect size for this SNP is not reported in the provided text.
• Birth weight (maternal analysis): The maternal GWAS (n=230,069 mothers) identified 72 independent signals; structural equation modeling was used to separate fetal and maternal genetic contributions across all loci.
• LINC02489 expression (pituitary gland): The alternate allele is associated with reduced expression of LINC02489 in pituitary tissue (slope: -0.09 in log2-normalized units; p=6.4e-5) GTEx Portal.
• CSTPP1 expression (esophagus and tibial nerve): Reduced CSTPP1 expression in esophagus mucosa (slope: -0.15; p=4.2e-6) and tibial nerve (slope: -0.10; p=3.9e-5) GTEx Portal.
• ENSG00000302244 expression (whole blood): Reduced expression of this currently uncharacterized gene in whole blood (slope: -0.14; p=1.2e-5) GTEx Portal.
• ENSG00000256897 expression (non-sun-exposed skin): Increased expression in non-sun-exposed suprapubic skin (slope: +0.14; p=3.2e-4) GTEx Portal.
• PACSIN3 expression (sun-exposed skin): Reduced PACSIN3 expression in sun-exposed lower leg skin (slope: -0.08; p=2.9e-4) GTEx Portal.

Evidence quality The birth weight evidence comes from one of the largest genetic association meta-analyses of birth weight conducted as of 2019, combining over 321,000 individuals for the fetal analysis and over 230,000 mothers for the maternal analysis under a conservative genome-wide significance threshold of p<6.6x10-9. The study's use of structural equation modeling and Mendelian randomization strengthens causal inference beyond standard GWAS design, representing a methodological strength. However, the provided text does not report the individual effect size or p-value for rs10437653 specifically, so its relative importance among the 190 identified signals cannot be evaluated from this evidence alone, and the evidence for this specific variant should be considered preliminary. The GTEx eQTL associations (GTEx v11, 953 donors, FDR<0.05) provide supporting molecular context across multiple tissues, but eQTL slopes reflect gene-expression regulation and are not direct measures of birth weight or disease risk. The eQTL effects are modest in magnitude (log2-normalized slopes ranging from -0.15 to +0.14 across tissues). No independent replication data specific to rs10437653 is present in the provided evidence, and the biological function of LINC02489 in pituitary or developmental biology is not characterized in the provided sources.

Tissue-specific expression effects

• LINC02489: Reduced expression in pituitary tissue for carriers of the alternate allele (slope: -0.09 in log2-normalized units; p=6.4e-5) GTEx Portal.
• CSTPP1: Reduced expression in esophagus mucosa (slope: -0.15; p=4.2e-6) and tibial nerve (slope: -0.10; p=3.9e-5) GTEx Portal.
• ENSG00000302244: Reduced expression in whole blood (slope: -0.14; p=1.2e-5) GTEx Portal.
• ENSG00000256897: Increased expression in non-sun-exposed suprapubic skin (slope: +0.14; p=3.2e-4) GTEx Portal.
• PACSIN3: Reduced expression in sun-exposed lower leg skin (slope: -0.08; p=2.9e-4) GTEx Portal.

Lifestyle considerations No lifestyle considerations on file for this variant.