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New insights into mechanisms of cardioprotection mediated by thyroid hormones

G Nicolini1, L Pitto, C Kusmic

  • 1Institute of Clinical Physiology, CNR, 56100 Pisa, Italy ; CNR, Tuscany Region G. Monasterio Foundation, Pisa, Italy.

Journal of Thyroid Research
|April 5, 2013
PubMed

Insights

Thyroid hormone plays a key role in cardiovascular health. Understanding its protective effects on cardiac remodeling, particularly in heart failure, is crucial for developing new treatments.

Area of Science:

  • Cardiology
  • Endocrinology
  • Molecular Biology

Background:

  • Heart failure, a major outcome of cardiovascular diseases, has high morbidity and mortality despite advances.
  • Cardiac remodeling is a key process in heart failure, necessitating early intervention for better patient prognosis.
  • Thyroid hormone signaling is vital for cardiovascular homeostasis, and "low triiodothyronine" syndrome predicts mortality in heart disease.

Purpose of the Study:

  • To explore the cardioprotective role of thyroid hormone in reversing adverse cardiac remodeling.
  • To discuss recent findings on thyroid hormone's impact on cardiac mitochondria, interstitium, and vasculature.
  • To highlight the role of specific microRNAs (miRNAs) in thyroid hormone regulation within the heart.

Main Methods:

  • Review of experimental models of cardiac hypertrophy and myocardial infarction.
  • Analysis of thyroid hormone signaling pathways in cardiovascular tissues.
  • Investigation of miRNA involvement in thyroid hormone-mediated cardiac regulation.

Main Results:

  • Alterations in thyroid hormone signaling are linked to cardiac dysfunction in experimental heart disease models.
  • Thyroid hormone influences cardiac mitochondria, interstitium, and vasculature, impacting remodeling processes.
  • Specific miRNAs are implicated in mediating thyroid hormone effects at mitochondrial and interstitial levels.

Conclusions:

  • Thyroid hormone demonstrates cardioprotective effects by reverting regulatory networks involved in adverse cardiac remodeling.
  • Further understanding of thyroid hormone and miRNA interactions is essential for novel therapeutic strategies against heart failure.
  • Targeting thyroid hormone pathways offers a promising avenue for ameliorating heart failure prognosis.

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