Fibroblast growth factor (FGF) 10 is essential for lung morphogenesis
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ABSTRACT:
PROVIDER: PRJNA962857 | ENA |
REPOSITORIES: ENA
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Project description:Fibroblast growth factor (FGF) 10 is essential for lung morphogenesis and polymorphisms in the Fgf10 region are linked with higher susceptibility towards COPD in human patients. We found that FGF10 signaling is impaired in lung septal wall compartment from COPD patients. Mice with impaired FGF10 signaling (Fgf10+/-) were more prone to develop cigarette smoke (CS)-induced emphysema and pulmonary hypertension (PH). Furthermore, FGF10 overexpression could successfully reverse cigarette smoke-induced emphysema and PH in mice.
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Project description:In Ciona intestinalis, the palps consist of three conical protrusions within a field of thickened epithelium that form late in embryogenesis as tailbuds mature into larvae. The palp protrusions express the LIM-homeodomain transcription factor Islet. Protrusion occurs through differential cell elongation, likely mediated by Islet, as we find that ectopic expression of Islet is sufficient to promote cell elongation. FGF signaling is required for both Islet expression and palp morphogenesis. Importantly, we show that Islet expression can rescue the palp-deficient phenotype that results from inhibition of FGF signaling. We conclude that Islet is a key regulatory factor governing morphogenesis of the palps. It is conceivable that Islet is also essential for the cellular morphogenesis of placode-derived sensory neurons in vertebrates. Islet expression can rescue the palp-deficient phenotype that results from inhibition of FGF signaling, and conclude that Islet is a key regulatory factor governing morphogenesis of the palps. Three biological replicates were analyzed for both sample types (Fox positive and Negative).
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Project description:We analyzed gene expression in human fibroblasts stimulated by platelet-derived growth factor-BB (PDGF-BB) or basic fibroblast growth factor (bFGF) for 1h and 24h. The results of two independent experiments were merged. SAM analysis identified 116 relevant probe sets. Hierarchical clustering of these probe sets showed divergent early gene regulation by PDGF and FGF but overlapping late response. We first analyzed genes commonly regulated by PDGF-BB and b-FGF more than 2 fold after 24h of stimulation and we found that these two growth factors repressed FOXO. We then focused on the early gene expression response induced by both growth factors. We performed a fold change analysis and found 114 probe sets regulated by PDGF-BB and 42 probe sets regulated by b-FGF, 37 of which were shared between the two gene lists . Keywords: Time course, cell Treatment comparison
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Project description:In Ciona intestinalis, the palps consist of three conical protrusions within a field of thickened epithelium that form late in embryogenesis as tailbuds mature into larvae. The palp protrusions express the LIM-homeodomain transcription factor Islet. Protrusion occurs through differential cell elongation, likely mediated by Islet, as we find that ectopic expression of Islet is sufficient to promote cell elongation. FGF signaling is required for both Islet expression and palp morphogenesis. Importantly, we show that Islet expression can rescue the palp-deficient phenotype that results from inhibition of FGF signaling. We conclude that Islet is a key regulatory factor governing morphogenesis of the palps. It is conceivable that Islet is also essential for the cellular morphogenesis of placode-derived sensory neurons in vertebrates. Islet expression can rescue the palp-deficient phenotype that results from inhibition of FGF signaling, and conclude that Islet is a key regulatory factor governing morphogenesis of the palps.
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Project description:Numerous studies have suggested a link between fibroblast growth factor (FGF) and vascular endothelial growth factor (VEGF) signaling pathways; however the nature of this link has not been established. To evaluate this relationship we investigated VEGF signaling in endothelial cells with disrupted FGF signaling in vitro and in vivo. We find that endothelial cells lacking FGF signaling become unresponsive to VEGF due to down regulation of VEGFR2 expression caused by reduced Vegfr2 enhancer activation, which is in turn caused by reduced activation of Ets family transcription factors. In vivo this manifests in the loss of vascular integrity and morphogenesis. Thus, basal FGF stimulation of the endothelium is required for maintenance of VEGFR2 expression and the ability to respond to VEGF stimulation and accounts for the hierarchic control of vascular formation by FGFs and VEGF. Primary mouse lung endothelial cells were transduced with either Adeno-Null (empty) or Adeno- dominant negative FGF receptor 1 and harvested 24 hours after transduction. Total RNA was extracted and subjected to the analysis using SuperArray GEArray Q Series Mouse Angiogenesis Gene Array. Comparisons were made between treatments.
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Project description:Numerous studies have suggested a link between fibroblast growth factor (FGF) and vascular endothelial growth factor (VEGF) signaling pathways; however the nature of this link has not been established. To evaluate this relationship we investigated VEGF signaling in endothelial cells with disrupted FGF signaling in vitro and in vivo. We find that endothelial cells lacking FGF signaling become unresponsive to VEGF due to down regulation of VEGFR2 expression caused by reduced Vegfr2 enhancer activation, which is in turn caused by reduced activation of Ets family transcription factors. In vivo this manifests in the loss of vascular integrity and morphogenesis. Thus, basal FGF stimulation of the endothelium is required for maintenance of VEGFR2 expression and the ability to respond to VEGF stimulation and accounts for the hierarchic control of vascular formation by FGFs and VEGF.
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