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Updated: Sep 26, 2026

In Vivo Mouse Model of Spinal Implant Infection
Published on: June 23, 2020
Pro-inflammatory and anti-inflammatory cytokine increases after spinal instrumentation surgery
Jun Takahashi1, Sohei Ebara, Mikio Kamimura
1Department of Orthopaedic Surgery, Shinshu University, School of Medicine, Shinshu University Hospital, Matsumo-City, Nagano, Japan. jtaka@hsp.md.shinshu-u.ac.jp
Abstract:
We investigated the effects of instrumentation on postoperative inflammatory reaction and identified standard changes in serum cytokine concentrations after spinal surgery. Pro-inflammatory cytokines [interleukin (IL)-6 and IL-8] and anti-inflammatory cytokines [IL-10, IL-1 receptor antagonist (ra), and soluble tumor necrosis factor receptors (sTNF-R) I and II] were assayed in serum from seven patients with lumbar spinal posterior decompression, six with spinal decompression and posterolateral fusion without instrumentation and seven with spinal decompression and posterolateral fusion with instrumentation. All cytokines after spinal instrumentation increased significantly more than in other groups on postoperative days 0 and 1. Seven days after SI, IL-6, -8, and -10 had normalized, but IL-1ra and sTNF-RI and sTNF-RII remained elevated. Both pro-inflammatory and anti-inflammatory cytokines were enhanced by implants in the acute phase, whereas only anti-inflammatory cytokines were enhanced by instruments in the subacute phase.
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