Assessment of the FAM174A 11G allele as a risk allele for equine metabolic syndrome

M. M. Roy, E. M. Norton, A. K. Rendahl, N. E. Schultz, D. McFarlane, R. J. Geor, J. R. Mickelson, M. E. McCue

Research output: Contribution to journalArticle

Abstract

An 11G nucleotide repeat in the 3′ UTR of FAM174A was recently postulated as a risk allele with a dominant mode of inheritance for equine metabolic syndrome (EMS) and laminitis status in Arabian horses. The objective of this project was to evaluate this hypothesis in a large and diverse across-breed population. A total of 301 ponies, 292 Morgans, 64 Arabians, 49 Tennessee Walking Horses and 59 Quarter Horses were genotyped for six observed G repeat alleles in the FAM174A 3′ UTR. Phenotype data included laminitis status, baseline insulin, glucose, non-esterified fatty acids, triglycerides, adiponectin, leptin, ACTH, insulin and glucose post oral sugar test, and two proxies for insulin resistance. The 11G allele frequencies were 18.8, 6.9, 1.8, 0.2 and 0.0% in the Arabians, Tennessee Walkers, ponies, Morgans and Quarter Horses respectively. Association analyses between FAM174A genotype and EMS phenotypes, and between allele count and EMS phenotypes, identified no statistically significant associations. When a dominant effect for the 11G allele was evaluated, a statistically significant association with adiponectin levels was identified in the ponies, and pairwise comparisons revealed that the estimated marginal means were higher in ponies with the 11G allele vs. alternative alleles (i.e. the allele had a protective effect). In conclusion, our data do not support the FAM174A 11G allele as a risk allele for EMS in our studied breeds.

Original languageEnglish (US)
JournalAnimal Genetics
DOIs
StateAccepted/In press - Jan 1 2020

Keywords

  • adiponectin
  • EMS
  • genetic risk factors
  • genetics
  • horse
  • insulin dysregulation
  • laminitis

PubMed: MeSH publication types

  • Journal Article

Fingerprint Dive into the research topics of 'Assessment of the FAM174A 11G allele as a risk allele for equine metabolic syndrome'. Together they form a unique fingerprint.

  • Cite this