PMID- 15814801 OWN - NLM STAT- MEDLINE DCOM- 20060301 LR - 20200225 IS - 1529-2401 (Electronic) IS - 0270-6474 (Print) IS - 0270-6474 (Linking) VI - 25 IP - 14 DP - 2005 Apr 6 TI - Matrix metalloproteinase-3: a novel signaling proteinase from apoptotic neuronal cells that activates microglia. PG - 3701-11 AB - Microglial activation and inflammation are associated with progressive neuronal apoptosis in neurodegenerative human brain disorders. We sought to investigate molecular signaling mechanisms that govern activation of microglia in apoptotic neuronal degeneration. We report here that the active form of matrix metalloproteinase-3 (MMP-3) was released into the serum-deprived media (SDM) of PC12 cells and other media of apoptotic neuronal cells within 2-6 h of treatment of the cells, and SDM and catalytic domain of recombinant MMP-3 (cMMP-3) activated microglia in primary microglia cultures as well as BV2 cells, a mouse microglia cell line. Both SDM and cMMP-3 induced generation of tumor necrosis factor alpha (TNF-alpha), interleukin-6 (IL-6), IL-1beta, and interleukin-1 receptor antagonist but not IL-12 and inducible nitric oxide synthase, which are readily induced by lipopolysaccharide, in microglia, suggesting that there is a characteristic pattern of microglial cytokine induction by apoptotic neurons. Neither glial cell line-derived neurotrophic factor nor anti-inflammatory cytokines, such as IL-10 and transforming growth factor-beta1, were induced. SDM and cMMP-3 extensively released TNF-alpha from microglia and activated the nuclear factor-kappaB pathway, and these microglial responses were totally abolished by preincubation with an MMP-3 inhibitor, NNGH [N-isobutyl-N-(4-methoxyphenylsulfonyl)-glycylhydroxamic acid]. MMP-3-mediated microglial activation mostly depended on ERK (extracellular signal-regulated kinase) phosphorylation but not much on either JNK (c-Jun N-terminal protein kinase) or p38 activation. Conditioned medium of SDM- or cMMP-3-activated BV2 cells caused apoptosis of PC12 cells. These results strongly suggest that the distinctive signal of neuronal apoptosis is the release of active form of MMP-3 that activates microglia and subsequently exacerbates neuronal degeneration. Therefore, the release of MMP-3 from apoptotic neurons may play a major role in degenerative human brain disorders, such as Parkinson's disease. FAU - Kim, Yoon Seong AU - Kim YS AD - Burke Medical Research Institute, Weill Medical College and Graduate School of Medical Sciences of Cornell University, White Plains, New York 10605, USA. FAU - Kim, Sung Soo AU - Kim SS FAU - Cho, Jeong Je AU - Cho JJ FAU - Choi, Dong Hee AU - Choi DH FAU - Hwang, Onyou AU - Hwang O FAU - Shin, Dong Hoon AU - Shin DH FAU - Chun, Hong Sung AU - Chun HS FAU - Beal, M Flint AU - Beal MF FAU - Joh, Tong H AU - Joh TH LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Neurosci JT - The Journal of neuroscience : the official journal of the Society for Neuroscience JID - 8102140 RN - 0 (Culture Media, Conditioned) RN - 0 (Culture Media, Serum-Free) RN - 0 (Cytokines) RN - 0 (Enzyme Inhibitors) RN - 0 (Lipopolysaccharides) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinases) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) SB - IM MH - Animals MH - Animals, Newborn MH - Apoptosis/drug effects/*physiology MH - Blotting, Northern/methods MH - Blotting, Western/methods MH - Brain/cytology MH - Cells, Cultured MH - Culture Media, Conditioned/pharmacology MH - Culture Media, Serum-Free/pharmacology MH - Cytokines/genetics/metabolism MH - Drug Interactions MH - Electrophoresis, Gel, Two-Dimensional/methods MH - Enzyme Inhibitors/pharmacology MH - Enzyme-Linked Immunosorbent Assay/methods MH - Gene Expression/drug effects MH - Humans MH - Lipopolysaccharides/toxicity MH - Matrix Metalloproteinase 3/chemistry/*metabolism/pharmacology MH - Mice MH - Microglia/drug effects/*physiology MH - Mitogen-Activated Protein Kinases/metabolism MH - Nerve Degeneration/chemically induced/metabolism MH - Neurons/*enzymology MH - Rats MH - Signal Transduction/*physiology MH - Time Factors PMC - PMC6725382 EDAT- 2005/04/09 09:00 MHDA- 2006/03/02 09:00 PMCR- 2005/10/06 CRDT- 2005/04/09 09:00 PHST- 2005/04/09 09:00 [pubmed] PHST- 2006/03/02 09:00 [medline] PHST- 2005/04/09 09:00 [entrez] PHST- 2005/10/06 00:00 [pmc-release] AID - 25/14/3701 [pii] AID - 10.1523/JNEUROSCI.4346-04.2005 [doi] PST - ppublish SO - J Neurosci. 2005 Apr 6;25(14):3701-11. doi: 10.1523/JNEUROSCI.4346-04.2005.