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Thyroid hormone action in postnatal heart development

Ming Li1, Siiri E Iismaa2, Nawazish Naqvi3

  • 1Victor Chang Cardiac Research Institute, Darlinghurst, NSW 2010, Australia.

Stem Cell Research
|August 5, 2014
PubMed

Insights

Thyroid hormone stimulates cardiomyocyte proliferation for postnatal cardiac development. Altered thyroid hormone metabolism in disease impairs heart function, but T3 therapy may improve contractility.

Area of Science:

  • Cardiology
  • Endocrinology
  • Developmental Biology

Background:

  • Thyroid hormone is essential for fetal and postnatal cardiac growth.
  • Recent findings highlight its role in stimulating cardiomyocyte proliferation during preadolescence.
  • Thyroid hormone metabolism is disrupted in chronic diseases like heart failure, leading to low T3 syndrome.

Purpose of the Study:

  • To review the role of thyroid hormone in postnatal cardiac development.
  • To explore the impact of altered thyroid hormone metabolism on cardiovascular function.
  • To consider therapeutic strategies involving thyroid hormone analogs for cardiac conditions.

Main Methods:

  • Review of existing literature on thyroid hormone and cardiac development.
  • Analysis of studies on cardiomyocyte proliferation in response to thyroid hormone.
  • Examination of clinical data regarding thyroid hormone levels in heart disease.

Main Results:

  • Thyroid hormone drives a significant burst of cardiomyocyte proliferation in the murine heart during preadolescence.
  • Low T3 syndrome, associated with chronic diseases, impairs cardiovascular function and prognosis.
  • Thyroid hormone analogs show potential in improving cardiac contractility, though mechanisms are unclear.

Conclusions:

  • Thyroid hormone plays a crucial role in postnatal cardiac development through cardiomyocyte proliferation.
  • Dysregulation of thyroid hormone metabolism in disease negatively impacts cardiac function.
  • Further research into T3's mitogenic potential for cardiomyocytes is warranted for therapeutic development.

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