PMID- 18923335 OWN - NLM STAT- MEDLINE DCOM- 20090210 LR - 20190104 IS - 1528-1159 (Electronic) IS - 0362-2436 (Linking) VI - 33 IP - 23 DP - 2008 Nov 1 TI - Mechanism of signal transduction in tumor necrosis factor-like weak inducer of apoptosis-induced matrix degradation by MMP-3 upregulation in disc tissues. PG - 2489-94 LID - 10.1097/BRS.0b013e318186b343 [doi] AB - STUDY DESIGN: Molecular biologic and immuno-histologic analyses using in vitro murine intervertebral disc tissue culture. OBJECTIVE: To investigate the role of tumor necrosis factor-like weak inducer of apoptosis (TWEAK) in matrix metalloproteinase 3 (MMP-3) pathway induction, and the effect of TWEAK to induce other cytokines or angiogenesis factors in disc tissues. SUMMARY OF BACKGROUND DATA: We previously demonstrated that TWEAK and its receptor Fn14 were expressed in murine disc tissues. TWEAK induced MMP-3 upregulation and aggrecan downregulation in disc tissues. METHODS: Enzyme-Linked ImmunoSorbent Assay (ELISA), western blot, and immuno-histologic analyses were used to assess the role of TWEAK-induced MMP-3, using murine disc tissue culture. RESULTS: TWEAK induced disc cells to generate MMP-3 as did TNF-alpha and IL-1beta. MMP-3 activity was detectable in murine disc cells. MMP-3 induction was markedly inhibited with a c-Jun N-terminal kinase (JNK) inhibitor. Phosphorylation of JNK was also confirmed. Introduction of TWEAK resulted in the degradation of disc matrix in organ disc culture, whereas proteoglycan degradation was markedly abrogated in the presence of an MMP-3 specific inhibitor or a JNK inhibitor. In addition, TWEAK also induced monocyte chemotactic protein (MCP)-1 via the NF-kappaB pathway, as phosphorylation of NF-kappaB was confirmed by western blotting. CONCLUSION: TWEAK plays an important role in MMP-3 induction in murine disc cells via JNK that results in degradation of disc matrix. TWEAK also induces MCP-1, which belongs to the chemokine family that recruits inflammatory cells via the NF-kappaB pathway. FAU - Wako, Masanori AU - Wako M AD - Department of Orthopaedic Surgery, Graduate School of Medicine and Engineering, University of Yamanashi, Yamanashi, Japan. FAU - Ohba, Tetsuro AU - Ohba T FAU - Ando, Takashi AU - Ando T FAU - Arai, Yoshiyasu AU - Arai Y FAU - Koyama, Kensuke AU - Koyama K FAU - Hamada, Yoshiki AU - Hamada Y FAU - Nakao, Atsuhito AU - Nakao A FAU - Haro, Hirotaka AU - Haro H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Spine (Phila Pa 1976) JT - Spine JID - 7610646 RN - 0 (Aggrecans) RN - 0 (Anthracenes) RN - 0 (Benzamides) RN - 0 (Cytokine TWEAK) RN - 0 (Enzyme Inhibitors) RN - 0 (Flavonoids) RN - 0 (Recombinant Proteins) RN - 0 (Tnfsf12 protein, mouse) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (Tumor Necrosis Factors) RN - 1TW30Y2766 (pyrazolanthrone) RN - 76145IS906 (N-(3,5-bis(trifluoromethyl)phenyl)-5-chloro-2-hydroxybenzamide) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) RN - SJE1IO5E3I (2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one) SB - IM MH - Aggrecans/metabolism MH - Animals MH - Anthracenes/pharmacology MH - Apoptosis/*drug effects MH - Benzamides/pharmacology MH - Cytokine TWEAK MH - Enzyme Induction MH - Enzyme Inhibitors/pharmacology MH - Enzyme-Linked Immunosorbent Assay MH - Extracellular Matrix/*drug effects/metabolism MH - Flavonoids/pharmacology MH - Immunoenzyme Techniques MH - Intervertebral Disc/*drug effects/metabolism MH - Matrix Metalloproteinase 3/*metabolism MH - Mice MH - Mice, Inbred C57BL MH - Recombinant Proteins/pharmacology MH - *Signal Transduction MH - Tissue Culture Techniques MH - Tumor Necrosis Factor-alpha/pharmacology MH - Tumor Necrosis Factors/*metabolism/pharmacology MH - Up-Regulation EDAT- 2008/10/17 09:00 MHDA- 2009/02/12 09:00 CRDT- 2008/10/17 09:00 PHST- 2008/10/17 09:00 [pubmed] PHST- 2009/02/12 09:00 [medline] PHST- 2008/10/17 09:00 [entrez] AID - 10.1097/BRS.0b013e318186b343 [doi] PST - ppublish SO - Spine (Phila Pa 1976). 2008 Nov 1;33(23):2489-94. doi: 10.1097/BRS.0b013e318186b343.