title: Expression Profiling of Circulating MicroRNAs in Canine Myxomatous Mitral Valve Disease.
abstract: MicroRNAs (miRNAs) are small non-coding RNAs that have shown promise as noninvasive biomarkers in cardiac disease. This study was undertaken to investigate the miRNA expression profile in dogs with myxomatous mitral valve disease (MMVD). 277 miRNAs were quantified using RT-qPCR from six normal dogs (American College of Veterinary Internal Medicine Stage A), six dogs with MMVD mild to moderate cardiac enlargement (ACVIM Stage B1/B2) and six dogs with MMVD and congestive heart failure (ACVIM Stage C/D). Eleven miRNAs were differentially expressed (False Discovery Rate < 0.05). Dogs in Stage B1/B2 or C/D had four upregulated miRNAs, including three cfa-let-7/cfa-miR-98 family members, while seven others were downregulated, compared to Stage A. Expression of six of the 11 miRNAs also were significantly different between dogs in Stage C/D and those in Stage B1/B2. The expression changes were greater as disease severity increased. These miRNAs may be candidates for novel biomarkers and may provide insights into genetic regulatory pathways in canine MMVD.
authors.affiliation: Nestle Purina Research, Saint Louis, MO 63164, USA. qinghong.li@rd.nestle.com.
authors.forename: Qinghong
authors.initials: Q
authors.lastname: Li
authors.affiliation: Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA 01536, USA. Lisa.Freeman@tufts.edu.
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Freeman
authors.affiliation: Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA 01536, USA. john.rush@tufts.edu.
authors.forename: John E
authors.initials: JE
authors.lastname: Rush
authors.affiliation: Nestle Purina Research, Saint Louis, MO 63164, USA. dorothy.laflamme@rd.nestle.com.
authors.forename: Dorothy P
authors.initials: DP
authors.lastname: Laflamme
mesh_terms: D000818:Animals; D015415:Biomarkers / Q000378:metabolism*; D004283:Dog Diseases / Q000097:blood* / Q000235:genetics / Q000473:pathology; D004285:Dogs; D005260:Female; D006349:Heart Valve Diseases / Q000097:blood / Q000175:diagnosis / Q000235:genetics / Q000662:veterinary*; D008297:Male; D035683:MicroRNAs / Q000097:blood* / Q000235:genetics*; D008945:Mitral Valve Prolapse / Q000097:blood / Q000175:diagnosis / Q000235:genetics / Q000662:veterinary*; D060888:Real-Time Polymerase Chain Reaction
chemical_list: D015415:Biomarkers; D035683:MicroRNAs
keywords: RT-qPCR; biomarker; congestive heart failure; dog; microRNA; myxomatous mitral valve disease