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Disorders of the Autonomic Nervous System01:18

Disorders of the Autonomic Nervous System

The autonomic nervous system (ANS) is an intricate network of nerves that controls functions such as the regulation of heart rate, digestion, and blood pressure regulation. When this system malfunctions, it can lead to various disorders that affect multiple bodily functions. One common feature of many autonomic disorders is the involvement of smooth blood vessels, which play a crucial role in regulating blood flow throughout the body.
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Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
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Antihypertensive Drugs: Angiotensin II Receptor Blockers01:30

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Related Experiment Video

Updated: Jul 7, 2026

Assessing Murine Resistance Artery Function Using Pressure Myography
07:25

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Published on: June 7, 2013

Interference with PPAR gamma function in smooth muscle causes vascular dysfunction and hypertension.

Carmen M Halabi1, Andreas M Beyer, Willem J de Lange

  • 1Genetics Program, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242, USA.

Cell Metabolism
|March 5, 2008
PubMed
Summary

Peroxisome proliferator-activated receptor gamma (PPARgamma) in vascular muscle regulates blood pressure and vascular function. This finding may explain cardiovascular benefits of diabetes drugs targeting PPARgamma.

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Last Updated: Jul 7, 2026

Assessing Murine Resistance Artery Function Using Pressure Myography
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Evaluation of Vascular Control Mechanisms Utilizing Video Microscopy of Isolated Resistance Arteries of Rats
10:28

Evaluation of Vascular Control Mechanisms Utilizing Video Microscopy of Isolated Resistance Arteries of Rats

Published on: December 5, 2017

Area of Science:

  • Cardiovascular Science
  • Metabolic Disease Research
  • Molecular Endocrinology

Background:

  • Peroxisome proliferator-activated receptor gamma (PPARgamma) is a key transcription factor in metabolism.
  • PPARgamma ligands, like thiazolidinediones, are used for type II diabetes and show cardiovascular benefits.
  • PPARgamma mutations are linked to type II diabetes and severe hypertension.

Purpose of the Study:

  • To investigate the role of PPARgamma in vascular smooth muscle.
  • To determine if PPARgamma influences vascular tone and blood pressure regulation.

Main Methods:

  • Generation of transgenic mice with smooth-muscle-specific dominant-negative PPARgamma mutations.
  • Assessment of vascular responsiveness to nitric oxide.
  • Analysis of aortic contractility.
  • Evaluation of cerebral microcirculation structure (hypertrophy, inward remodeling).
  • Measurement of systolic blood pressure.

Main Results:

  • Transgenic mice showed impaired nitric oxide responsiveness.
  • Significant alterations in aortic contractility were observed.
  • Cerebral microcirculation exhibited hypertrophy and inward remodeling.
  • These mice developed systolic hypertension.

Conclusions:

  • PPARgamma is crucial in vascular smooth muscle for regulating vascular structure and function.
  • PPARgamma's role in vascular muscle explains its impact on blood pressure.
  • This research potentially elucidates the cardioprotective mechanisms of thiazolidinediones.