Journal
JOURNAL OF SPINAL DISORDERS
Volume 14, Issue 4, Pages 339-342Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00002517-200108000-00010
Keywords
intervertebral disc; herniation; inflammation; macrophage; nucleus pulposus; annulus fibrosus
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An in vivo murine experiment was conducted to measure the capacities of viable intervertebral disc cells to recruit inflammatory cells. The objective was to determine whether compounds secreted from viable cells induce inflammation or whether inflammation in disc herniation simply requires exposure to structural cell or matrix components. Three tissue preparations were inserted into the right lower peritoneal cavity of male mice: tissue with viable annulus fibrosus and nucleus pulposus cells, tissue with viable annulus fibrosus cells. or devitalized annulus fibrosus and nucleus pulposus tissue. Controls included sham-operated and nonoperated groups. Mice were killed 1, 2, or 7 days after surgery. Macrophage recruitment occurred after exposure to viable disc tissue but not after exposure to devitalized disc components: recruitment increased over time, Viable disc cells play a role in the etiology of inflammation in disc herniation.
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