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Application of Genetically Encoded Fluorescent Nitric Oxide (NO&#8226;) Probes, the geNOps, for Real-time Imaging of NO&#8226; Signals in Single Cells
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Vascular nitric oxide: Beyond eNOS.

Yingzi Zhao1, Paul M Vanhoutte1, Susan W S Leung1

  • 1State Key Laboratory of Pharmaceutical Biotechnology, Department of Pharmacology & Pharmacy, The University of Hong Kong, Hong Kong SAR, China.

Journal of Pharmacological Sciences
|October 27, 2015
PubMed
Summary
This summary is machine-generated.

Nitric oxide (NO) regulates vascular tone by influencing smooth muscle cells via cyclic guanosine monophosphate (cGMP) and other pathways. NO dysfunction contributes to cardiovascular diseases like hypertension and atherosclerosis.

Keywords:
Endothelial cellsL-arginineNitrate/nitriteNitric oxideNitric oxide synthaseS-nitrosothiolsVascular smooth muscle

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Area of Science:

  • Cardiovascular Physiology
  • Molecular Signaling

Background:

  • Nitric oxide (NO) is a key gaseous signaling molecule impacting vascular cell functions.
  • Vascular tone regulation is a critical process influenced by NO.

Purpose of the Study:

  • To review the role of NO in regulating vascular tone.
  • To summarize the sources of NO within the blood vessel wall.

Main Methods:

  • Review of existing literature on nitric oxide signaling.
  • Analysis of NO production pathways, including endothelial nitric oxide synthase (eNOS).
  • Examination of NO's mechanisms of action, both cGMP-dependent and cGMP-independent.

Main Results:

  • NO primarily regulates vascular smooth muscle contraction by stimulating soluble guanylyl cyclase (sGC) to produce cyclic guanosine monophosphate (cGMP).
  • cGMP-independent pathways, such as S-nitrosylation and SERCA activation, also contribute to NO's effects.
  • NO is mainly produced by eNOS from L-arginine but can also be sourced from S-nitrosothiols and nitrate/nitrite.

Conclusions:

  • NO plays a vital role in maintaining vascular homeostasis.
  • Endothelial dysfunction, characterized by impaired NO production or bioavailability, is linked to cardiovascular pathologies including hypertension and atherosclerosis.