Abstract:
:Proper bone remodeling requires an active process of angiogenesis which in turn supplies the necessary growth factors and stem cells. This tissue cooperation suggests a cross-talk between osteoblasts and endothelial cells. This work aims to identify the role of paracrine communication through vascular endothelial growth factor (VEGF) in co-culture between osteoblastic and endothelial cells. Through a well defined direct contact co-culture model between human osteoprogenitors (HOPs) and human umbilical vein endothelial cells (HUVECs), we observed that HUVECs were able to migrate along HOPs, inducing the formation of specific tubular-like structures. VEGF(165) gene expression was detected in the HOPs, was up-regulated in the co-cultured HOPs and both Flt-1 and KDR gene expression increased in co-cultured HUVECs. However, the cell rearrangement observed in co-culture was promoted by a combination of soluble chemoattractive factors and not by VEGF(165) alone. Despite having no observable effect on endothelial cell tubular-like formation, VEGF appeared to have a crucial role in osteoblastic differentiation since the inhibition of its receptors reduced the co-culture-stimulated osteoblastic phenotype. This co-culture system appears to enhance both primary angiogenesis events and osteoblastic differentiation, thus allowing for the development of new strategies in vascularized bone tissue engineering.
journal_name
J Cell Biochemjournal_title
Journal of cellular biochemistryauthors
Grellier M,Ferreira-Tojais N,Bourget C,Bareille R,Guillemot F,Amédée Jdoi
10.1002/jcb.22018subject
Has Abstractpub_date
2009-02-15 00:00:00pages
390-8issue
3eissn
0730-2312issn
1097-4644journal_volume
106pub_type
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