Extracellular matrix and adhesion molecule gene expression in the normal and injured murine intervertebral disc

Yejia Zhang, Zuozhen Tian, Jason W. Ashley, Luqiang Wang, Robert J. Tower, Yulong Wei, Ling Qin, Shuying Yang, Motomi Enomoto-Iwamoto

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Objective The aim of the study was to determine the transcription profile of the mouse nucleus pulposus and annulus fibrosus with an unbiased method. Furthermore, pathophysiological relevance of selected genes was demonstrated in the mouse tail intervertebral disc injury model. Design Paired normal mouse nucleus pulposus and annulus fibrosus tissue from C57BL/6j mice was examined by a polymerase chain reaction array. Key gene expression in the normal and injured intervertebral discs was confirmed by real-time polymerase chain reaction. Results Among the 84 genes studied, 63 were expressed higher in annulus fibrosus than in nucleus pulposus; only four genes were expressed higher in nucleus pulposus than in annulus fibrosus (n = 4, P ≤ 0.05). Real-time polymerase chain reaction confirmed that cadherin (cdh) 2 gene expression was higher in nucleus pulposus than in annulus fibrosus, and type I collagen (col1) gene expression was higher in the annulus fibrosus than in nucleus pulposus (n = 8, P < 0.01). One week after tail intervertebral disc injury, cdh2 gene expression decreased, while col1 expression increased (n = 8, P < 0.01). Conclusions This is the first study to examine the relative expression of 84 genes in normal mouse nucleus pulposus and annulus fibrosus. Key genes in the normal and injured mouse intervertebral discs were confirmed with real-time polymerase chain reaction. This information should be useful for studying the mouse model of intervertebral disc degeneration and guide future cell therapy approaches.

Original languageEnglish (US)
Pages (from-to)35-42
Number of pages8
JournalAmerican Journal of Physical Medicine and Rehabilitation
Volume98
Issue number1
DOIs
StatePublished - Jan 1 2019
Externally publishedYes

Keywords

  • Adhesion Molecules
  • Annulus Fibrosus
  • Extracellular Matrix
  • Intervertebral Disc
  • Mouse
  • Nucleus Pulposus
  • Polymerase Chain Reaction Array

ASJC Scopus subject areas

  • Physical Therapy, Sports Therapy and Rehabilitation
  • Rehabilitation

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