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- W2054276212 abstract "Activin receptor-like kinase 1 (ALK1) is an endothelial-specific type I receptor of the TGFbeta receptor family that is implicated in angiogenesis and in the pathogenesis of the vascular disease, hereditary hemorrhagic telangiectasia (HHT). In the absence of a specific ligand, ALK1 cellular functions have been mainly studied through the use of a constitutively active form of this receptor (ALK1ca) and are still debated. We previously reported that ALK1ca inhibits proliferation and migration of human endothelial cells suggesting that ALK1 plays an important role in the maturation phase of angiogenesis (Lamouille et al., 2002, Blood 100: 4495-4501). In the present work, we further analyzed the role of ALK1 in the migration of human dermal microvascular endothelial cell (HMVEC-d) and observed that silencing endogenous ALK1 expression with siRNAs accelerates endothelial cell migration in the wound assay. Further, we demonstrate that ALK1-induced inhibition of migration is Smad-independent. Using a panel of kinase inhibitors, we found that HMVEC-d wound closure was completely inhibited by a JNK inhibitor and to a lower degree by an ERK kinase inhibitor. Further, HMVEC-d wounding induced activation of both JNK and ERK, and these were inhibited by ALK1ca expression. Taken together, these results support a significant role for ALK1 as a negative regulator of endothelial cell migration and suggest the implication of JNK and ERK as mediators of this effect." @default.
- W2054276212 created "2016-06-24" @default.
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- W2054276212 date "2007-01-01" @default.
- W2054276212 modified "2023-10-17" @default.
- W2054276212 title "Activin receptor-like kinase 1 inhibits human microvascular endothelial cell migration: Potential roles for JNK and ERK" @default.
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- W2054276212 doi "https://doi.org/10.1002/jcp.21126" @default.
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