Nucleosomes bind fibroblast growth factor-2 for increased angiogenesis in vitro and in vivo.
Solid tumors often display sites of necrosis near regions of angiogenesis in vivo. As tumor cell necrosis would result in the release of nucleosomes into the extracellular environment, we explored the potential role of nucleosomes in the promotion of angiogenesis. Data indicate that nucleosomes acted similar to heparin and bound to several heparin-binding, proangiogenic factors [i.e., fibroblast growth factor (FGF)-1, FGF-2, vascular endothelial growth factor, and transforming growth factor-beta1]. Nucleosomes modestly enhanced FGF-2 growth of human umbilical vein endothelial cells when grown in restricted media as well as increased human umbilical vein endothelial cell migration and primitive blood vessel tube formation in vitro. On s.c. injection in mice, nucleosomes aided FGF-2 in promoting angiogenesis. These results suggest that nucleosomes released from dying tumor cells aid in the formation of blood vessels and may provide a novel means by which tumor cells increase angiogenesis.
Tanner
Jerome E
JE
TanTec Biosystems, Inc., 11 Des Arbres, Dollard-des-Ormeaux, Quebec, Canada H9G 3C2. jetanner@tantecbiosystems.com
Forté
André
A
Panchal
Chandra
C
D043925:Angiogenesis Inducing Agents / Q000378:metabolism; D000818:Animals; D002465:Cell Movement; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D003094:Collagen; D004338:Drug Combinations; D016222:Fibroblast Growth Factor 2 / Q000378:metabolism* / Q000494:pharmacology; D006493:Heparin / Q000378:metabolism; D006801:Humans; D007797:Laminin; D051379:Mice; D009361:Neoplasm Invasiveness; D009389:Neovascularization, Pathologic; D009707:Nucleosomes / Q000235:genetics / Q000378:metabolism*; D011485:Protein Binding; D011509:Proteoglycans; D014470:Umbilical Cord / Q000098:blood supply / Q000166:cytology
D043925:Angiogenesis Inducing Agents; D004338:Drug Combinations; D007797:Laminin; D009707:Nucleosomes; D011509:Proteoglycans; D016222:Fibroblast Growth Factor 2; C059485:matrigel; D006493:Heparin; D003094:Collagen