Targeting mitochondrial dysfunction with small molecules in intervertebral disc aging and degeneration.

Area of Science:

• Biomedical Science
• Regenerative Medicine
• Cell Biology

Background:

• Rheumatic and musculoskeletal diseases (RMDs), including osteoarthritis and low back pain (LBP), pose significant healthcare burdens, particularly in aging populations.
• Intervertebral disc (IVD) degeneration, a key contributor to LBP, involves cellular dysfunction, extracellular matrix alterations, and is exacerbated by mitochondrial issues.
• Mitochondria, crucial for IVD cell energy and reactive oxygen species (ROS) production, become detrimental when dysfunctional, leading to oxidative stress, cell death, and senescence.

Purpose of the Study:

• To review the pathogenesis of mitochondrial dysfunction in IVD degeneration.
• To highlight small molecules and growth factors that regulate mitochondrial function and maintain IVD cell homeostasis.
• To identify mitochondria-targeting molecules and their potential for IVD regeneration.

Main Methods:

• Literature review focusing on mitochondrial dysfunction in IVD degeneration.
• Analysis of small molecules and biological growth factors impacting mitochondrial function.
• Exploration of mitophagy and its regulatory molecules in IVD cells.

Main Results:

• Mitochondrial dysfunction is a critical factor in IVD degeneration, driving oxidative stress and cell senescence.
• Small molecules and specific growth factors demonstrate potential in modulating mitochondrial activity for IVD health.
• Mitophagy plays a key role in cellular events related to IVD degeneration, with several small molecules influencing its function.

Conclusions:

• Targeting mitochondrial dysfunction presents a promising therapeutic strategy for intervertebral disc degeneration and low back pain.
• Further research into mitochondria-modulating agents and mitophagy activators could lead to novel regenerative approaches for IVD.
• Maintaining mitochondrial homeostasis is essential for preserving IVD cell function and preventing degeneration.