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A Proinflammatory, Degenerative Organ Culture Model to Simulate Early-Stage Intervertebral Disc Disease.
Published on: February 14, 2021
The Relation Between Sox9, TGF-beta1, and Proteoglycan in Human Intervertebral Disc Cells
Yong-Jik Lee1, Min-Ho Kong, Kwan-Young Song
1Division of Clinical Research , Seoul Medical Center Research Institute, Seoul, Korea.
Journal of Korean Neurosurgical Society
|December 20, 2008
Summary
Transforming growth factor-beta 1 (TGF-beta1) and L-ascorbic acid significantly boost proteoglycan synthesis in intervertebral disc cells. TGF-beta1 increases proteoglycan production by upregulating Sox9 expression.
Area of Science:
- Biochemistry
- Cell Biology
- Regenerative Medicine
Background:
- Intervertebral disc degeneration involves proteoglycan loss.
- Understanding factors influencing proteoglycan synthesis is crucial for therapeutic development.
Purpose of the Study:
- To investigate the effects of TGF-beta1 and L-ascorbic acid on proteoglycan synthesis in intervertebral disc cells.
- To explore the relationship between Sox9, proteoglycans, and TGF-beta1.
Main Methods:
- Human intervertebral disc cells were cultured in monolayer and pellet systems.
- Cells were treated with TGF-beta1 and/or L-ascorbic acid.
- Sulfated glycosaminoglycan (sGAG) production was measured using DMMB assay.
- Sox9 mRNA and protein levels were analyzed via RT-PCR and Western blot.
Main Results:
- Both TGF-beta1 and L-ascorbic acid significantly increased sGAG production.
- Co-treatment with TGF-beta1 and L-ascorbic acid yielded higher sGAG levels than individual treatments.
- TGF-beta1 treatment led to a significant increase in Sox9 mRNA and protein expression.
Conclusions:
- TGF-beta1 promotes proteoglycan synthesis, including versican, in intervertebral disc cells.
- This effect is mediated by the upregulation of Sox9 mRNA and protein expression.
- TGF-beta1 and L-ascorbic acid show potential in enhancing disc cell matrix production.
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