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Articles by Raghav Goyal in JoVE
JoVE Bioengineering
Uso de Células-tronco humanas perivasculares para Regeneração Óssea
1Dental and Craniofacial Research Institute and Section of Orthodontics, School of Dentistry, UCLA, 2UCLA and Orthopaedic Hospital, Department of Orthopaedic Surgery and the Orthopaedic Hospital Research Center, UCLA, 3Department of Bioengineering, UCLA, 4Center for Cardiovascular Science, University of Edinburgh
As células-tronco perivascular (PSC) é um romance classe de células-tronco para a regeneração do tecido ósseo semelhante a células-tronco mesenquimais (MSCs). PSCs pode ser isolado por FACS (classificação de células activadas por fluorescência) a partir de tecido adiposo adquiridos durante procedimentos padrão lipoaspiração, então combinada com um andaime osteoindutora para alcançar a formação de osso
Other articles by Raghav Goyal on PubMed
Additive Effects of Sonic Hedgehog and Nell-1 Signaling in Osteogenic Versus Adipogenic Differentiation of Human Adipose-Derived Stromal Cells
A theoretical inverse relationship exists between osteogenic (bone forming) and adipogenic (fat forming) mesenchymal stem cell (MSC) differentiation. This inverse relationship in theory partially underlies the clinical entity of osteoporosis, in which marrow MSCs have a preference for adipose differentiation that increases with age. Two pro-osteogenic cytokines have been recently studied that each also possesses antiadipogenic properties: Sonic Hedgehog (SHH) and NELL-1 proteins. In the present study, we assayed the potential additive effects of the biologically active N-terminus of SHH (SHH-N) and NELL-1 protein on osteogenic and adipogenic differentiation of human primary adipose-derived stromal cell (hASCs). We observed that both recombinant SHH-N and NELL-1 protein significantly enhanced osteogenic differentiation and reduced adipose differentiation across all markers examined (alkaline phosphatase, Alizarin red and Oil red O staining, and osteogenic gene expression). Moreover, SHH-N and NELL-1 directed signaling produced additive effects on the pro-osteogenic and antiadipogenic differentiation of hASCs. NELL-1 treatment increased Hedgehog signaling pathway expression; coapplication of the Smoothened antagonist Cyclopamine reversed the pro-osteogenic effect of NELL-1. In summary, Hedgehog and Nell-1 signaling exert additive effects on the pro-osteogenic and antiadipogenic differentiation of ASCs. These studies suggest that the combination cytokines SHH-N+NELL-1 may represent a viable future technique for inducing the osteogenic differentiation of MSCs.
