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Serum microRNA profiles in cats with hypertrophic cardiomyopathy

K Weber1, N Rostert, S Bauersachs

  • 1Faculty of Veterinary Medicine, Clinic of Small Animal Medicine, Centre for Clinical Veterinary Medicine, LMU Munich, Veterinaerstr. 13, 80539, Munich, Germany, karin.weber@lmu.de.

Molecular and Cellular Biochemistry
|January 10, 2015
PubMed

Insights

MicroRNAs (miRNAs) show distinct serum profiles in cats with hypertrophic cardiomyopathy (HCM), a common feline heart disease. These findings may offer new diagnostic insights and reveal underlying disease mechanisms.

Area of Science:

  • Cardiology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNAs (miRNAs) are implicated in human and rodent heart diseases, but their role in feline hypertrophic cardiomyopathy (HCM) is understudied.
  • HCM is the most prevalent cardiac condition in domestic cats, with largely unknown pathology potentially linked to genetics.

Purpose of the Study:

  • To investigate miRNA profiles in the serum of cats with HCM-induced congestive heart failure.
  • To identify differentially expressed miRNAs and their potential mRNA targets in feline HCM.
  • To explore the utility of feline HCM as a spontaneous disease model for comparative cardiac research.

Main Methods:

  • Serum samples from 11 cats with HCM and 12 healthy controls were analyzed using miRNA arrays.
  • Differential expression analysis identified 11 significantly altered miRNAs (fold change ≥ 1.6).
  • Quantitative RT-PCR validated the upregulation of miR-1246; bioinformatic analysis predicted 49 mRNA targets involved in cardiac hypertrophy.

Main Results:

  • A distinct miRNA profile was observed in cats with HCM compared to healthy controls.
  • Eleven miRNAs, including miR-381-3p, miR-486-3p, and miR-1246, were significantly differentially expressed.
  • Predicted mRNA targets are associated with pathways involved in cardiac hypertrophy.

Conclusions:

  • Feline HCM exhibits a unique serum miRNA signature, with several miRNAs mirroring those found in human and rodent cardiac disease models.
  • These findings highlight the potential of studying spontaneous feline HCM to elucidate cardiac disease pathogenesis.
  • The identified miRNAs may serve as potential biomarkers for feline cardiac conditions.

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