Peer-reviewed veterinary case report
Gene changes in heart tissue of Great Danes with dilated
By Oyama, M A et al.·Published in Journal of veterinary internal medicine·2009·Department of Clinical Studies, United States·View original on PubMed →
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Original publication title: Decreased triadin and increased calstabin2 expression in Great Danes with dilated cardiomyopathy.
- Species:
- dog
Plain-English summary
Three Great Danes with advanced dilated cardiomyopathy (DCM), a serious heart condition, were studied to understand the genetic changes associated with this disease. Researchers found that two specific proteins, calstabin2 and triadin, were expressed at abnormal levels in these dogs. Calstabin2 was significantly increased, while triadin was decreased, which may disrupt normal heart function. This research highlights potential genetic targets for further investigation that could help in understanding and treating DCM in Great Danes.
People also search for: Great Dane heart disease symptoms · dilated cardiomyopathy in dogs · treatments for dog heart problems
Abstract
BACKGROUND: Dilated cardiomyopathy (DCM) is a common cardiac disease of Great Dane dogs, yet very little is known about the underlying molecular abnormalities that contribute to disease. OBJECTIVE: Discover a set of genes that are differentially expressed in Great Dane dogs with DCM as a way to identify candidate genes for further study as well as to better understand the molecular abnormalities that underlie the disease. ANIMALS: Three Great Dane dogs with end-stage DCM and 3 large breed control dogs. METHODS: Prospective study. Transcriptional activity of 42,869 canine DNA sequences was determined with a canine-specific oligonucleotide microarray. Genome expression patterns of left ventricular tissue samples from affected Great Dane dogs were evaluated by measuring the relative amount of complementary RNA hybridization to the microarray probes and comparing it with expression from large breed dogs with noncardiac disease. RESULTS: Three hundred and twenty-three transcripts were differentially expressed (> or = 2-fold change). The transcript with the greatest degree of upregulation (+61.3-fold) was calstabin2 (FKBP12.6), whereas the transcript with the greatest degree of downregulation (-9.07-fold) was triadin. Calstabin2 and triadin are both regulatory components of the cardiac ryanodine receptor (RyR2) and are critical to normal intracellular Ca2+ release and excitation-contraction coupling. CONCLUSION AND CLINICAL IMPORTANCE: Great Dane dogs with DCM demonstrate abnormal calstabin2 and triadin expression. These changes likely affect Ca2+ flux within cardiac cells and may contribute to the pathophysiology of disease. Microarray-based analysis identifies calstabin2, triadin, and RyR2 function as targets of future study.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/19674278/