PMID- 30468453 OWN - NLM STAT- MEDLINE DCOM- 20191119 LR - 20191119 IS - 2284-0729 (Electronic) IS - 1128-3602 (Linking) VI - 22 IP - 21 DP - 2018 Nov TI - Interleukin-1beta exacerbates the catabolic effects of human nucleus pulposus cells through activation of the Nuclear Factor kappa B signaling pathway under hypoxic conditions. PG - 7129-7139 LID - 16244 [pii] LID - 10.26355/eurrev_201811_16244 [doi] AB - OBJECTIVE: To determine the regulatory role of interleukin 1 beta (IL-1beta) in the Nuclear Factor kappa B (NF-kappaB) -mediated catabolic effects of the nucleus pulposus cells in human intervertebral disc degeneration under hypoxic conditions. PATIENTS AND METHODS: Human nucleus pulposus cells were cultured and exposed to IL-1beta under hypoxic or normoxic environments, with or without NF-kappaB inhibition. The cell growth was determined using cell counting kit-8; gene and protein expressions were analyzed by Real-time polymerase chain reaction and Western blotting, respectively. RESULTS: Co-treatment with IL-1beta and hypoxia decreased cell viability in human nucleus pulposus cells. There was a positive effect of IL-1beta on human nucleus pulposus cells under hypoxia, which was through the up-regulation of matrix metalloproteinase-3 (MMP-3), MMP-13, a disintegrin and metalloproteinase with thrombospondin motifs (ADAMTS)-4, and ADAMTS-5. IL-1beta-induced expressions of MMP-3, MMP-9, ADAMTS-4, and ADAMTS-5 under hypoxia were accompanied by increased activation of NF-kappaB. Inhibition of NF-kappaBp65 by small interfering RNA or specific inhibitor BAY11-7082 blocked IL-1beta-dependent gene upregulation of MMP-3, MMP-13, ADAMTS-4, and ADAMTS-5 in a hypoxic environment. The gene expression of aggrecan was decreased by IL-1beta under hypoxic conditions, which was reversed by either BAY11-7082 or NF-kappaBp65 knockdown. CONCLUSIONS: IL-1beta and hypoxia synergetically contributed to the catabolic effects of the nucleus pulposus cells by upregulating the expression of MMP-3, MMP-13, ADAMTS-4 and ADAMTS-5 through the activation of NF-kappaB signaling pathway, indicating that the NF-kappaB signaling pathway is a key mediator of intervertebral disc degeneration. FAU - Sun, Z-Y AU - Sun ZY AD - Shanghai Songjiang District Central Hospital, Shanghai, China. tjw609@163.com. FAU - Liu, Y-T AU - Liu YT FAU - Liang, H AU - Liang H FAU - Li, Y AU - Li Y FAU - Wang, D-G AU - Wang DG FAU - Tian, J-W AU - Tian JW LA - eng PT - Journal Article PL - Italy TA - Eur Rev Med Pharmacol Sci JT - European review for medical and pharmacological sciences JID - 9717360 RN - 0 (Aggrecans) RN - 0 (Interleukin-1beta) RN - 0 (NF-kappa B) SB - IM MH - Adult MH - Aggrecans/genetics MH - Cell Survival/drug effects MH - Cells, Cultured MH - Humans MH - Hypoxia/metabolism MH - Interleukin-1beta/*metabolism MH - Intervertebral Disc Degeneration/metabolism/*pathology MH - Middle Aged MH - NF-kappa B/*metabolism MH - Nucleus Pulposus/*cytology MH - Signal Transduction/drug effects MH - Young Adult EDAT- 2018/11/24 06:00 MHDA- 2019/11/20 06:00 CRDT- 2018/11/24 06:00 PHST- 2018/11/24 06:00 [entrez] PHST- 2018/11/24 06:00 [pubmed] PHST- 2019/11/20 06:00 [medline] AID - 16244 [pii] AID - 10.26355/eurrev_201811_16244 [doi] PST - ppublish SO - Eur Rev Med Pharmacol Sci. 2018 Nov;22(21):7129-7139. doi: 10.26355/eurrev_201811_16244.