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Genetic Variants Associated with Circulating Parathyroid Hormone.

Cassianne Robinson-Cohen1,2, Pamela L Lutsey3, Marcus E Kleber4

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Genetic factors influence parathyroid hormone (PTH) levels. This genome-wide study identified common variants near genes for vitamin D metabolism and mineral transport associated with PTH variation.

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Area of Science:

  • Endocrinology and Genetics
  • Human Molecular Genetics
  • Calcium and Bone Metabolism

Background:

  • Parathyroid hormone (PTH) is crucial for calcium regulation.
  • Elevated PTH is linked to bone disease, hypertension, and cardiovascular mortality.
  • Genetic underpinnings of PTH concentration variability are not fully understood.

Purpose of the Study:

  • To identify common genetic variants associated with circulating parathyroid hormone (PTH) concentrations.
  • To investigate the genetic architecture of PTH regulation through a genome-wide association study (GWAS).

Main Methods:

  • Conducted a large-scale genome-wide association study (GWAS) with 29,155 participants of European ancestry.
  • Analyzed associations between single nucleotide polymorphisms (SNPs) and natural log-transformed PTH concentrations.
  • Adjusted for covariates including age, sex, season, study site, and ancestry principal components.

Main Results:

  • Discovered five independent genomic regions associated with serum PTH concentrations.
  • Identified the strongest association with rs6127099 upstream of CYP24A1 (P=4.2 × 10⁻⁵³), a key gene in vitamin D metabolism.
  • Replicated associations for three SNPs: rs6127099, rs4074995 (RGS14), and rs219779 (CLDN14).

Conclusions:

  • Common genetic variants near genes involved in vitamin D metabolism and mineral transport are associated with PTH level variations.
  • These findings contribute to understanding the genetic basis of PTH regulation.
  • Further research is warranted to determine causal variants and their clinical significance.