Chromone Derivatives as a Novel NOX4 Inhibitor: Design, Synthesis, and Regulation of ROS in Renal Fibroblast

Area of Science:

• Medicinal Chemistry
• Renal Pathophysiology
• Molecular Pharmacology

Background:

• Renal fibrosis is a significant contributor to chronic kidney disease progression.
• Nicotinamide adenine dinucleotide phosphate oxidase 4 (NOX4) is implicated in the pathogenesis of renal fibrosis.
• Targeting NOX4 presents a therapeutic strategy for kidney diseases.

Purpose of the Study:

• To design and synthesize novel chromone derivatives as potential NOX4 inhibitors.
• To evaluate the efficacy of these compounds in a cellular model of renal fibrosis.
• To identify a lead compound for further drug development against NOX4-mediated renal fibrosis.

Main Methods:

• Synthesis of chromone derivatives.
• Establishment of a NOX4 overexpression model in NRK-49F rat renal fibroblasts.
• Assessment of intracellular reactive oxygen species (ROS) levels.
• Drug affinity responsive target stability (DARTS) assay to confirm target binding.
• Mechanistic studies to evaluate antifibrotic and anti-inflammatory effects.

Main Results:

• Compound 14m demonstrated high activity in inhibiting NOX4 in the cellular model.
• 14m exhibited stable binding affinity with NOX4, confirmed by DARTS assay.
• Mechanistic studies revealed that 14m ameliorates fibrosis and inflammation in renal fibroblasts.
• The study identified 14m as a promising NOX4 inhibitor with potential therapeutic applications.

Conclusions:

• Compound 14m is a potent NOX4 inhibitor with significant potential for treating renal fibrosis.
• This research expands the structural diversity of NOX4 inhibitors.
• 14m serves as a valuable lead compound for developing novel therapeutics for kidney diseases.