title: A catalytic role for proangiogenic marrow-derived cells in tumor neovascularization.
abstract: Small numbers of proangiogenic bone marrow-derived cells (BMDCs) can play pivotal roles in tumor progression. In this issue of Cancer Cell, two papers, utilizing different tumor angiogenesis models, both find that activated MMP-9 delivered by BMDCs modulates neovessel remodeling, thereby promoting tumor growth. The changes in microvascular anatomy induced by MMP-9-expressing BMDCs are strikingly different between the preirradiated tumor vascular bed model employed by Ahn and Brown and the invasive glioblastoma model utilized by Du et al., likely mirroring the complexity of the real tumor microenvironment and the intricacy of roles of different BMDC populations in mediating tumor neoangiogenesis.
authors.affiliation: Howard Hughes Medical Institute, Ansary Center for Stem Cell Therapeutics, Department of Genetic Medicine, Weill Cornell Medical College, New York, NY 10065, USA. seandelm@mskcc.org
authors.forename: Marco
authors.initials: M
authors.lastname: Seandel
authors.forename: Jason
authors.initials: J
authors.lastname: Butler
authors.forename: David
authors.initials: D
authors.lastname: Lyden
authors.forename: Shahin
authors.initials: S
authors.lastname: Rafii
mesh_terms: D042501:Angiogenic Proteins / Q000378:metabolism; D000818:Animals; D001854:Bone Marrow Cells / Q000201:enzymology*; D016026:Bone Marrow Transplantation; D015687:Cell Hypoxia; D002465:Cell Movement; D042783:Endothelial Cells / Q000201:enzymology; D005909:Glioblastoma / Q000098:blood supply / Q000201:enzymology; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D020780:Matrix Metalloproteinase 9 / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D018345:Mice, Knockout; D009000:Monocytes / Q000201:enzymology* / Q000637:transplantation; D022423:Myeloid Cells / Q000201:enzymology* / Q000637:transplantation; D009361:Neoplasm Invasiveness; D009374:Neoplasms, Experimental / Q000098:blood supply* / Q000201:enzymology* / Q000473:pathology / Q000628:therapy; D009389:Neovascularization, Pathologic / Q000201:enzymology* / Q000473:pathology / Q000517:prevention & control; D015398:Signal Transduction; D013234:Stem Cells / Q000201:enzymology; D013997:Time Factors
chemical_list: D042501:Angiogenic Proteins; C497443:Hif1a protein, mouse; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; D020780:Matrix Metalloproteinase 9; C501830:Mmp9 protein, mouse