[Sub-endplate microcirculation disturbance directly contributes to intervertebral disc degeneration]

Area of Science:

• Orthopedics
• Pathology
• Vascular Biology

Context:

• Intervertebral disc degeneration (IVDD) is a significant cause of low back pain.
• The pathogenesis of IVDD is complex and not fully understood.
• Sub-endplate microcirculation plays a crucial role in disc health.

Purpose:

• To establish an animal model of sub-endplate microcirculation disturbance.
• To investigate the role of this disturbance in the development of IVDD.
• To identify potential pathogenic mechanisms of IVDD.

Summary:

• An animal model was created in New Zealand white rabbits using endotoxin and corticosteroid to induce sub-endplate microcirculation disturbance, confirmed by microthrombus staining.
• The treatment group exhibited reduced disc water content and altered biochemistry compared to controls after three months.
• Morphological analysis revealed significant intervertebral disc degeneration in the model group.

Impact:

• Sub-endplate microcirculation disturbance is a direct contributor to intervertebral disc degeneration.
• Impaired nutrient diffusion across the endplate is identified as a potential pathogenic mechanism.
• This research provides insights into the vascular basis of IVDD, informing future therapeutic strategies.