Title : Ras induction of superoxide activates ERK-dependent angiogenic transcription factor HIF-1alpha and VEGF-A expression in shock wave-stimulated osteoblasts.

Pub. Date : 2004 Mar 12

PMID : 14681237






3 Functional Relationships(s)
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1 Ras induction of superoxide activates ERK-dependent angiogenic transcription factor HIF-1alpha and VEGF-A expression in shock wave-stimulated osteoblasts. Superoxides mitogen-activated protein kinase 1 Homo sapiens
2 Further studies demonstrated that SW significantly promoted ERK activation in 1 h and HIF-1alpha phosphorylation and HIF-1alpha binding to VEGF promoter in 3 h. In support of the observation that superoxide mediated the SW-induced ERK activation and HIF-1alpha transactivation, we further demonstrated that scavenging of superoxide by superoxide dismutase and inhibition of ERK activity by PD98059 decreased HIF-1alpha activation and VEGF-A levels. Superoxides mitogen-activated protein kinase 1 Homo sapiens
3 Further studies demonstrated that SW significantly promoted ERK activation in 1 h and HIF-1alpha phosphorylation and HIF-1alpha binding to VEGF promoter in 3 h. In support of the observation that superoxide mediated the SW-induced ERK activation and HIF-1alpha transactivation, we further demonstrated that scavenging of superoxide by superoxide dismutase and inhibition of ERK activity by PD98059 decreased HIF-1alpha activation and VEGF-A levels. Superoxides mitogen-activated protein kinase 1 Homo sapiens