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Related Experiment Video

Updated: Dec 27, 2025

Ultrasound Assessment of Endothelial Function: A Technical Guideline of the Flow-mediated Dilation Test
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Vitamin D and Endothelial Function.

Do-Houn Kim1,2, Cesar A Meza1, Holly Clarke1

  • 1Department of Nutrition, Food and Exercise Sciences, Florida State University, Tallahassee, FL 32306, USA.

Nutrients
|February 27, 2020
PubMed
Summary
This summary is machine-generated.

Vitamin D protects blood vessels by improving nitric oxide (NO) availability and reducing oxidative stress. It also counteracts inflammation, thereby preventing endothelial dysfunction and atherosclerosis.

Keywords:
NONOXROScalcitrioleNOSendothelial dysfunctioninflammationnitric oxideoxidative stressvitamin D deficiency

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Area of Science:

  • Cardiovascular Science
  • Endocrinology
  • Nutritional Science

Background:

  • Endothelial dysfunction (ED) is a precursor to atherosclerosis, characterized by reduced nitric oxide (NO) bioavailability.
  • Vitamin D deficiency is linked to ED, impacting NO synthesis and antioxidant capacity.
  • Oxidative stress and inflammation are key contributors to ED.

Purpose of the Study:

  • To review the multifaceted roles of vitamin D in regulating endothelial function.
  • To elucidate vitamin D's mechanisms in maintaining nitric oxide (NO) bioavailability.
  • To explore vitamin D's impact on oxidative stress and inflammation in endothelial cells.

Main Methods:

  • Literature review focusing on vitamin D's effects on endothelial cells.
  • Analysis of vitamin D's influence on nitric oxide synthase (eNOS) activity.
  • Examination of vitamin D's modulation of reactive oxygen species (ROS) production and inflammatory pathways.

Main Results:

  • Vitamin D enhances NO bioavailability by mediating endothelial NO synthase (eNOS) activity.
  • Vitamin D mitigates oxidative stress by inhibiting NADPH oxidase and boosting antioxidant enzymes like superoxide dismutase.
  • Vitamin D suppresses NF-κB signaling, reducing pro-inflammatory mediators (TNF-α, IL-6) and atherosclerotic factor expression.

Conclusions:

  • Vitamin D plays a crucial vasoprotective role by enhancing NO bioavailability and improving endothelial function.
  • Vitamin D's antioxidant and anti-inflammatory properties are key to its protective effects against endothelial dysfunction.
  • Maintaining adequate vitamin D levels may be important for preventing atherosclerosis and cardiovascular disease.