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Endothelial dysfunction and low grade chronic inflammation in subclinical hypothyroidism due to autoimmune

Esat Erdem Türemen1, Berrin Çetinarslan, Tayfun Şahin

  • 1Department of Endocrinology and Metabolism, Kocaeli University, 41110, Turkey. eturemen@gmail.com

Endocrine Journal
|April 15, 2011
PubMed

Insights

Subclinical hypothyroidism is linked to endothelial dysfunction and chronic inflammation, impacting cardiovascular health. These findings suggest inflammation may contribute to vascular issues in patients with subclinical hypothyroidism.

Area of Science:

  • Cardiology
  • Endocrinology
  • Immunology

Background:

  • Subclinical hypothyroidism (SH) is a growing concern for cardiovascular disease (CVD).
  • Controversy exists regarding SH's cardiovascular impact and optimal management.
  • Atherosclerosis precursors like endothelial dysfunction and inflammation are investigated in SH.

Purpose of the Study:

  • To investigate endothelial dysfunction and inflammation in subclinical hypothyroidism.
  • To compare vascular responses between SH patients and healthy controls.
  • To explore correlations between inflammatory markers, lipid profiles, and vascular function in SH.

Main Methods:

  • Recruited 37 SH patients and 23 healthy volunteers.
  • Assessed endothelial function via flow-mediated dilation (FMD) and nitroglycerin (NTG) response.
  • Measured serum inflammatory markers (TNF-alpha, IL-6, hs-CRP) and calculated HOMA scores for insulin resistance.

Main Results:

  • SH patients exhibited significantly impaired endothelium-dependent (FMD) and endothelium-independent (NTG) vascular responses compared to controls.
  • Elevated TSH, LDL, IL-6, TNF-alpha, and hs-CRP levels were observed in the SH group.
  • Endothelium-dependent vasodilation correlated positively with inflammatory markers, TSH, and lipid parameters.

Conclusions:

  • Endothelial dysfunction is present in subclinical hypothyroidism.
  • Low-grade chronic inflammation may be a significant contributor to endothelial dysfunction in SH.
  • Findings suggest autoimmune thyroiditis-related inflammation impacts vascular health in SH.

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