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A genome-wide association study for melatonin secretion.

Pi-Hua Liu1,2, Gwo-Tsann Chuang3,4, Chia-Ni Hsiung5

  • 1Clinical Informatics and Medical Statistics Research Center, College of Medicine, Chang Gung University, Taoyüan, Taiwan.

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This study identified five genetic loci linked to melatonin secretion using a genome-wide association study (GWAS). These findings offer new insights into the genetic underpinnings of melatonin levels.

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Area of Science:

  • Genetics
  • Endocrinology
  • Neuroscience

Background:

  • Melatonin influences numerous physiological processes across various tissues.
  • Genetic factors influencing melatonin secretion remain largely uncharacterized.
  • Understanding these determinants is crucial for comprehending melatonin's systemic roles.

Purpose of the Study:

  • To conduct the first genome-wide association study (GWAS) to identify genetic loci associated with melatonin secretion.
  • To analyze the relationship between single nucleotide polymorphisms (SNPs) and melatonin levels, measured by the 6-hydroxymelatonin sulfate-to-creatinine ratio (UMCR).

Main Methods:

  • A GWAS was performed on 2373 participants from the Taiwan Biobank.
  • Melatonin secretion was assessed using the morning urine 6-hydroxymelatonin sulfate-to-creatinine ratio (UMCR).
  • Statistical analyses adjusted for age, sex, principal components of ancestry, and estimated glomerular filtration rate (eGFR).

Main Results:

  • Five candidate genetic loci (ZFHX3, GALNT15, GALNT13, LDLRAD3, and an intergenic region) showed significant association with log-transformed UMCR.
  • P-values for these associations ranged from 6.83 × 10-7 to 3.44 × 10-6.
  • The identified genes are implicated in circadian rhythms, neuronal development, and neurological disorders.

Conclusions:

  • This study presents the first GWAS identifying genetic loci associated with melatonin secretion.
  • The findings highlight potential genetic links between melatonin levels and neurological functions.
  • Further replication and functional studies are warranted to validate these genetic associations.