Challenges, Progresses, and Promises for Developing Future NADPH Oxidase Therapeutics

Karen Bedard1, Scott Whitehouse1, Vincent Jaquet2

  • 11 Department of Pathology, Dalhousie University , Halifax, Canada .

Insights

NADPH oxidase (NOX) enzymes are promising drug targets. This research explores NOX roles in disease, new inhibitors, and biomarkers for NOX activity, offering therapeutic potential.

Area of Science:

  • Biochemistry
  • Pharmacology
  • Molecular Biology

Background:

  • NADPH oxidase (NOX) enzymes play critical roles in cellular signaling and oxidative stress.
  • Dysregulation of NOX isoforms is implicated in various pathologies, making them attractive therapeutic targets.

Discussion:

  • This forum examines the involvement of specific NOX isoforms in oxidative stress-related diseases.
  • It reviews current NOX antagonists and agonists, alongside potential side effects of NOX inhibition.
  • The need for novel oxidative biomarkers to monitor NOX activity in patients is highlighted.

Key Insights:

  • A novel small molecule inhibitor targeting NOX2 has been discovered.
  • Inhibition of the proton channel Hv1 presents an innovative strategy for modulating NOX activity.

Outlook:

  • Further research into NOX isoform-specific functions and targeted therapies is warranted.
  • Development of reliable oxidative biomarkers will be crucial for clinical applications.
  • Targeting NOX enzymes and related pathways offers significant therapeutic promise for oxidative stress-mediated diseases.

Related Concept Videos

Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
5.3K
Phase I Oxidative Reactions: Overview01:19

Phase I Oxidative Reactions: Overview

Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
1.0K
Electron Transport Chain: Complex III and IV01:43

Electron Transport Chain: Complex III and IV

During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
9.8K
Electron Transport Chain: Complex I and II01:46

Electron Transport Chain: Complex I and II

The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
19.6K
Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
985
Redox Reactions01:27

Redox Reactions

Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
1.4K