Promoting Regeneration in Degenerative Disc Disease

Area of Science:

• Orthopedics
• Regenerative Medicine
• Biomedical Engineering

Background:

• Degenerative disc disease (DDD) is multifactorial, with mechanical stress as a key etiological factor.
• Proteoglycans (PGs) are crucial for intervertebral disc (IVD) function and are implicated in degenerative and regenerative processes.

Purpose of the Study:

• To evaluate the impact of reduced axial stress on the proteoglycan (PG) content of degenerated intervertebral discs (IVDs).

Main Methods:

• A prospective study involving 27 patients with 38 degenerated IVDs treated with posterior lumbar spinal fixation.
• Posterior intervertebral distraction was applied during surgery to reduce axial stress.
• Delayed gadolinium-enhanced MRI of cartilage (dGEMRIC) was used to quantify PG content before and after surgery.

Main Results:

• Clinical symptoms significantly improved post-surgery.
• Operated discs showed a significant increase in thickness and improved PG content, indicated by reduced gadolinium uptake on dGEMRIC.
• Control discs remained unchanged.

Conclusions:

• Decreasing mechanical stress on degenerated IVDs can improve PG quantity and potentially initiate disc regeneration.
• Alleviating mechanical stress is a promising strategy for enhancing IVD homeostasis and promoting recovery.