Reactivating mitochondrial quality control via the Nrf2 pathway to combat metabolic stress in diabetic osteoarthritis

Area of Science:

• Biochemistry
• Molecular Biology
• Rheumatology

Background:

• Diabetes mellitus (DM) and osteoarthritis (OA) share risk factors and a distinct metabolic phenotype, diabetic osteoarthritis (DOA).
• Systemic metabolic toxicity in DM independently accelerates articular degeneration in OA.
• Persistent hyperglycemia drives oxidative stress, inflammation, and advanced glycation end products (AGEs), disrupting chondrocyte energy balance.

Purpose of the Study:

• To delineate the molecular mechanisms underlying diabetic osteoarthritis (DOA).
• To explore the role of mitochondrial quality control (MQC) and the Nrf2 signaling pathway in DOA.
• To propose therapeutic strategies targeting the Nrf2-MQC axis for diabetes-associated joint degeneration.

Main Methods:

• Literature review integrating epidemiological and mechanistic evidence.
• Analysis of molecular pathways involved in hyperglycemia-induced chondrocyte dysfunction.
• Focus on mitochondrial quality control (MQC) and Nrf2 signaling.

Main Results:

• Hyperglycemia-induced oxidative stress, inflammation, and AGEs disrupt chondrocyte bioenergetic homeostasis.
• Dysregulation of mitochondrial quality control (MQC) is a key event in DOA pathogenesis.
• Nrf2 signaling pathway dysregulation is a critical upstream determinant of mitochondrial dysfunction.

Conclusions:

• Therapeutic restoration of the Nrf2-MQC axis is a potential strategy to preserve mitochondrial integrity.
• Targeting the Nrf2-MQC axis may slow the progression of diabetes-associated joint degeneration.
• Understanding DOA's molecular framework offers new avenues for joint protection in diabetic patients.