Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Different Expression of Extracellular Matrix Genes: Primary vs. Recurrent Disc Herniation

  • Kuh, Sung-Uk (Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine) ;
  • Kwon, Young-Min (Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine) ;
  • Chin, Dong-Kyu (Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine) ;
  • Kim, Keun-Su (Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine) ;
  • Jin, Byung-Ho (Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine) ;
  • Cho, Yong-Eun (Department of Neurosurgery, Spine and Spinal Cord Institute, Yonsei University College of Medicine)
  • Published : 2010.01.28
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Abstract

Objective: Recurrent lumbar disc herniation has been reported to occur in 5% to 15% of surgically treated primary lumbar disc herniation cases. We investigated the molecular biologic characteristics of primary herniated discs and recurrent discs to see whether the recurrent discs has the similar biological features with primary herniated discs. Methods: Primary hemiated disc and recurrent disc cells were obtained by discectomy of lumbar disc patients and cells were isolated and then taken through monolayer cultures. We compared chondrogenic and osteogenic mRNA gene expression, and western blot between the two groups. Results: The mRNA gene expression of recurrent disc cells were increased 1.47* times for aggrecan, 1.38 times for type I collagen, 2.04 times for type II collagen, 1.22 times for both Sox-9 and osteocalcin, and 1.31 times for alkaline phosphatase, respectively, compared with the primary herniated lumbar disc cells (*indicates p < 0.05). Westem blot results for each aggrecan, type I collagen, type II collagen, Sox-9, osteocalcin, and alkaline phosphatase were similar between the primary herniated disc cells and recurrent disc cells. Conclusion: These results indicate that the recurrent disc cells have similar chondrogenic and osteogenic gene expression compared to primary herniated disc cells. Therefore, we assumed that the regeneration of remaining discs could fill the previous discectomy space and also it could be one of the factors for disc recurrence especially in the molecular biologic field.

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References

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