Proteasomal Dysfunction Induced By Diclofenac Engenders Apoptosis Through Mitochondrial Pathway

Area of Science:

• Biochemistry
• Molecular Biology
• Pharmacology

Background:

• Diclofenac is a widely used NSAID with known anti-proliferative effects.
• The molecular mechanisms underlying NSAID-induced apoptosis and anti-cancer properties are not fully understood.

Purpose of the Study:

• To investigate the molecular mechanisms of diclofenac-induced apoptosis.
• To explore the role of proteasome function and mitochondrial pathways in diclofenac's anti-cancer effects.

Main Methods:

• Cell treatment with diclofenac.
• Analysis of proteasome substrate accumulation.
• Assessment of protein ubiquitylation and aggregation.
• Evaluation of mitochondrial membrane potential and cytochrome c release.

Main Results:

• Diclofenac treatment caused proteasome malfunction and accumulation of proteasome substrates, including pro-apoptotic proteins.
• Diclofenac exposure led to increased aggregation of ubiquitylated, misfolded proteins.
• Diclofenac induced apoptosis via mitochondrial membrane depolarization and cytochrome c release.

Conclusions:

• Diclofenac promotes apoptosis through proteasome inhibition and mitochondrial pathway activation.
• Understanding these mechanisms offers insights into NSAID-based anti-cancer strategies.
• Further research into NSAIDs could enhance anti-proliferative therapeutic development.