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The NOX toolbox: validating the role of NADPH oxidases in physiology and disease

Sebastian Altenhöfer1, Pamela W M Kleikers, Kim A Radermacher

  • 1Department of Pharmacology, Cardiovascular Research Institute Maastricht, Vascular Drug Discovery Group, Faculty of Medicine, Health and Life Science, Maastricht University, The Netherlands.

Cellular and Molecular Life Sciences : CMLS
|June 1, 2012
PubMed

Insights

Reactive oxygen species (ROS) are vital signals but can cause disease. Targeting specific ROS-producing enzymes like NADPH oxidase 4 (NOX4) may offer therapeutic benefits for conditions linked to oxidative stress.

Area of Science:

  • Biochemistry
  • Cellular Biology
  • Pharmacology

Background:

  • Reactive oxygen species (ROS) play dual roles as cellular signals and disease triggers.
  • Imbalances in ROS (oxidative or reductive stress) can be detrimental, explaining antioxidant therapy limitations.
  • NADPH oxidases (NOX) are key enzymatic ROS producers, with NOX4 being a widely distributed isoform.

Purpose of the Study:

  • To critically review experimental tools for assessing NOX and NOX4 roles.
  • To characterize the NADPH oxidase inhibitor VAS2870, focusing on its specificity, selectivity, and mechanism.
  • To discuss NOX4 as a therapeutic target for diseases like stroke, heart failure, and fibrosis.

Main Methods:

  • Review of existing research tools: knock-out mice, siRNAs, antibodies, and inhibitors.
  • In vitro and in vivo characterization of the small molecule inhibitor VAS2870.
  • Assessment of NOX4's potential as a therapeutic target.

Main Results:

  • Evaluation of the strengths and limitations of various NOX/NOX4 research tools.
  • Detailed analysis of VAS2870's properties, including its specificity and mechanism of action.
  • Identification of NOX4 as a promising target for treating oxidative stress-related diseases.

Conclusions:

  • NOX4 is a critical regulator of cellular redox balance.
  • Targeting specific NOX enzymes, like NOX4, offers a promising therapeutic strategy.
  • VAS2870 shows potential as a tool for NOX4 research and therapy development.

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