Absence of myocardial thyroid hormone inactivating deiodinase results in restrictive cardiomyopathy in mice

Cintia B. Ueta, Behzad N. Oskouei, Emerson L. Olivares, Jose R. Pinto, Mayrin M. Correa, Gordana Simovic, Warner S. Simonides, Joshua M. Hare, Antonio C. Bianco

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Cardiac injury induces myocardial expression of the thyroid hormone inactivating type 3 deiodinase (D3), which in turn dampens local thyroid hormone signaling. Here, we show that the D3 gene (Dio3) is a tissue-specific imprinted gene in the heart, and thus, heterozygous D3 knockout (HtzD3KO) mice constitute a model of cardiac D3 inactivation in an otherwise systemically euthyroid animal. HtzD3KO newborns have normal hearts but later develop restrictive cardiomyopathy due to cardiac-specific increase in thyroid hormone signaling, including myocardial fibrosis, impaired myocardial contractility, and diastolic dysfunction. In wild-type littermates, treatment with isoproterenol-induced myocardial D3 activity and an increase in the left ventricular volumes, typical of cardiac remodeling and dilatation. Remarkably, isoproterenol-treated HtzD3KO mice experienced a further decrease in left ventricular volumes with worsening of the diastolic dysfunction and the restrictive cardiomyopathy, resulting in congestive heart failure and increased mortality. These findings reveal crucial roles for Dio3 in heart function and remodeling, which may have pathophysiologic implications for human restrictive cardiomyopathy.

Original languageEnglish (US)
Pages (from-to)809-818
Number of pages10
JournalMolecular Endocrinology
Issue number5
StatePublished - May 2012
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Endocrinology


Dive into the research topics of 'Absence of myocardial thyroid hormone inactivating deiodinase results in restrictive cardiomyopathy in mice'. Together they form a unique fingerprint.

Cite this