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Updated: Oct 5, 2025
05:46
A Proinflammatory, Degenerative Organ Culture Model to Simulate Early-Stage Intervertebral Disc Disease.
Published on: February 14, 2021
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Similarity and difference between aging and puncture-induced intervertebral disc degeneration
Shuangjun He1,2, Yijian Zhang1, Zhangzhe Zhou1
1Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, China.
Summary
Aging and puncture cause distinct intervertebral disc degeneration. Aging leads to thicker fibers and inflammation, while puncture causes significant matrix loss, impacting disc height and mechanical properties.
Area of Science:
- Biomedical Engineering
- Orthopedics
- Regenerative Medicine
Background:
- Intervertebral disc degeneration (IVDD) is a significant cause of back pain.
- Understanding the distinct mechanisms of IVDD induced by aging versus mechanical injury is crucial for developing targeted therapies.
Purpose of the Study:
- To investigate and compare the micromorphological and mechanical property changes in intervertebral discs (IVDs) induced by aging and puncture in a rat model.
- To elucidate the differential molecular and cellular alterations associated with aging-induced versus puncture-induced IVDD.
Main Methods:
- Utilized plain film, MRI, and histological testing to assess IVDD.
- Employed atomic force microscopy (AFM) for microstructure and elastic modulus analysis.
- Conducted immunohistochemistry for collagen I, collagen II, MMP-3, and TNF-α expression.
Main Results:
- Both aging degeneration group (ADG) and puncture degeneration group (PDG) showed decreased disc height and increased histological scores.
- ADG exhibited thickened annulus fibrosus (AF) fibers and elevated inflammatory markers (MMP-3, TNF-α).
- PDG demonstrated significant extracellular matrix loss, with altered collagen II levels and increased elastic modulus in annulus fibrosus and nucleus pulposus.
Conclusions:
- Aging and puncture induce distinct pathological changes in intervertebral discs.
- Aging-induced degeneration is characterized by chronic inflammation and structural thickening.
- Puncture-induced degeneration results in severe matrix degradation, highlighting different therapeutic targets.
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