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• W2109641216 endingPage "1088" @default.
• W2109641216 startingPage "1080" @default.
• W2109641216 abstract "Notch signalling pathways are critical for angiogenesis and endothelial cell (EC) fate; however the mechanisms regulating these processes in the inflamed joint remain to be elucidated. Here, we examine whether Notch signalling mediates vascular endothelial growth factor (VEGF) and angiopoietin 2 (Ang2)-induced vascular function.Notch-1 intracellular domain (Notch-1 IC), Notch-4 IC, Delta-like-ligand 4, Hes-related transcriptional repressors-1 and 2 (Hrt-1, Hrt-2) mRNA and/or protein expression was measured by Real-time PCR and/or western blot. VEGF/Ang2 induced EC function was assessed using transwell invasion chambers, matrigel tube formation assays and wound repair scratch assays±Notch-1 siRNA or an γ-secretase inhibitor N-(N-(3,5-Difluorophenacetyl-L-alanly))-S-phenylglycine-t-Butyl Ester (DAPT) in RA synovial explants or human microvascular EC. Interleukin (IL)-6 and IL-8 were measured by ELISA and MMP2 and 9 by gelatine zymography.Notch-1 IC and Notch-4 IC protein expressions were demonstrated in RA and psoriatic arthritis synovial biopsies, with minimal expression observed in Osteoarthritis (OA). VEGF and Ang2 induced Notch-1 IC/ Notch-4 IC protein expression in synovial explant cultures and human microvascular EC levels were further potentiated by VEGF/Ang2 stimulation in combination. Notch-1, Delta-like-ligand 4, and Hrt-2 mRNA expression were significantly induced by VEGF and Ang2 alone and in combination. Furthermore VEGF/Ang2-induced EC invasion, angiogenesis and migration were inhibited by Notch-1 siRNA or DAPT. Conditioned media from VEGF/Ang2 stimulated RA synovial explants induced EC tube formation, an effect that was inhibited by DAPT. Finally, DAPT significantly decreased VEGF/Ang2 induced IL-6, IL-8, MMP2 and 9 expressions in RA synovial explants.Notch-1 mediates VEGF/Ang2-induced angiogenesis and EC invasion in inflammatory arthritis." @default.
• W2109641216 created "2016-06-24" @default.
• W2109641216 creator A5011749195 @default.
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• W2109641216 creator A5056804062 @default.
• W2109641216 creator A5070602542 @default.
• W2109641216 creator A5090642719 @default.
• W2109641216 date "2012-11-17" @default.
• W2109641216 modified "2023-10-10" @default.
• W2109641216 title "Notch signalling pathways mediate synovial angiogenesis in response to vascular endothelial growth factor and angiopoietin 2" @default.
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• W2109641216 doi "https://doi.org/10.1136/annrheumdis-2012-201978" @default.
• W2109641216 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3664379" @default.
• W2109641216 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23161900" @default.
• W2109641216 hasPublicationYear "2012" @default.

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