title: Macrophage migration and invasion is regulated by MMP10 expression.
abstract: This study was designed to identify metalloproteinase determinants of macrophage migration and led to the specific hypothesis that matrix metalloproteinase 10 (MMP10/stromelysin-2) facilitates macrophage migration. We first profiled expression of all MMPs in LPS-stimulated primary murine bone marrow-derived macrophages and Raw264.7 cells and found that MMP10 was stimulated early (3 h) and down-regulated later (24 h). Based on this pattern of expression, we speculated that MMP10 plays a role in macrophage responses, such as migration. Indeed, using time lapse microscopy, we found that RNAi silencing of MMP10 in primary macrophages resulted in markedly reduced migration, which was reversed with exogenous active MMP10 protein. Mmp10 (-/-) bone marrow-derived macrophages displayed significantly reduced migration over a two-dimensional fibronectin matrix. Invasion of primary wild-type macrophages into Matrigel supplemented with fibronectin was also markedly impaired in Mmp10 (-/-) cells. MMP10 expression in macrophages thus emerges as an important moderator of cell migration and invasion. These findings support the hypothesis that MMP10 promotes macrophage movement and may have implications in understanding the control of macrophages in several pathologies, including the abnormal wound healing response associated with pro-inflammatory conditions.
authors.affiliation: School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, Norfolk, United Kingdom.
authors.forename: Megan Y
authors.initials: MY
authors.lastname: Murray
authors.forename: Timothy P
authors.initials: TP
authors.lastname: Birkland
authors.forename: Jonathan D
authors.initials: JD
authors.lastname: Howe
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Rowan
authors.forename: Mark
authors.initials: M
authors.lastname: Fidock
authors.forename: William C
authors.initials: WC
authors.lastname: Parks
authors.forename: Jelena
authors.initials: J
authors.lastname: Gavrilovic
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells / Q000166:cytology; D002460:Cell Line; D002465:Cell Movement / Q000187:drug effects; D005109:Extracellular Matrix / Q000187:drug effects / Q000378:metabolism; D005353:Fibronectins / Q000378:metabolism; D015971:Gene Expression Regulation, Enzymologic / Q000187:drug effects; D020868:Gene Silencing; D008070:Lipopolysaccharides / Q000494:pharmacology; D008264:Macrophages / Q000166:cytology* / Q000187:drug effects / Q000201:enzymology / Q000276:immunology*; D053506:Matrix Metalloproteinase 10 / Q000172:deficiency / Q000235:genetics*; D051379:Mice; D008810:Mice, Inbred C57BL; D016328:NF-kappa B / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D013997:Time Factors
chemical_list: D005353:Fibronectins; D008070:Lipopolysaccharides; D016328:NF-kappa B; D012333:RNA, Messenger; D053506:Matrix Metalloproteinase 10