Project description:RhoB null mice show decreases in pathological angiogenesis in the ischemic retina and reduces angiogenesis in response to cutaneous wounding, but enhances lymphangiogenesis following both dermal wounding and inflammatory challenge. We used microarrays to link these unique and opposing roles of RhoB in blood versus lymphatic vasculatures to RhoB/VEZF1-mediated gene regulation in primary human blood versus lymphatic endothelial cells. Pure populations of human primary BVECs and LVECs silenced for RhoB or VEZF1 were used for RNA extraction and hybridization on Affymetrix microarrays. We extracted these cells from human male foreskins from at least four individuals and purified them using Dynabeads associated with vascular markers (CD31 and Podoplanin).
Project description:RhoB null mice show decreases in pathological angiogenesis in the ischemic retina and reduces angiogenesis in response to cutaneous wounding, but enhances lymphangiogenesis following both dermal wounding and inflammatory challenge. We used microarrays to link these unique and opposing roles of RhoB in blood versus lymphatic vasculatures to RhoB/VEZF1-mediated gene regulation in primary human blood versus lymphatic endothelial cells.
Project description:Analysis of ex vivo isolated lymphatic endothelial cells from the dermis of patients to define type 2 diabetes-induced changes. Results preveal aberrant dermal lymphangiogenesis and provide insight into its role in the pathogenesis of persistent skin inflammation in type 2 diabetes. The ex vivo dLEC transcriptome reveals a dramatic influence of the T2D environment on multiple molecular and cellular processes, mirroring the phenotypic changes seen in T2D affected skin. The positively and negatively correlated dLEC transcripts directly cohere to prolonged inflammatory periods and reduced infectious resistance of patients´ skin. Further, lymphatic vessels might be involved in tissue remodeling processes during T2D induced skin alterations associated with impaired wound healing and altered dermal architecture. Hence, dermal lymphatic vessels might be directly associated with T2D disease promotion. Global gene expression profile of normal dermal lymphatic endothelial cells (ndLECs) compared to dermal lymphatic endothelial cells derived from type 2 diabetic patients (dLECs).Quadruplicate biological samples were analyzed from human lymphatic endothelial cells (4 x diabetic; 4 x non-diabetic). subsets: 1 disease state set (dLECs), 1 control set (ndLECs)
Project description:Analysis of ex vivo isolated lymphatic endothelial cells from the dermis of patients to define type 2 diabetes-induced changes. Results preveal aberrant dermal lymphangiogenesis and provide insight into its role in the pathogenesis of persistent skin inflammation in type 2 diabetes. The ex vivo dLEC transcriptome reveals a dramatic influence of the T2D environment on multiple molecular and cellular processes, mirroring the phenotypic changes seen in T2D affected skin. The positively and negatively correlated dLEC transcripts directly cohere to prolonged inflammatory periods and reduced infectious resistance of patients´ skin. Further, lymphatic vessels might be involved in tissue remodeling processes during T2D induced skin alterations associated with impaired wound healing and altered dermal architecture. Hence, dermal lymphatic vessels might be directly associated with T2D disease promotion.
Project description:The distinction between lymphatic and blood vessels is biologically fundamental. Two immortalized cell lines, which have been widely used as models for endothelial cells of blood vascular origin, are the human microvascular endothelial cell line-1 (HMEC-1) and the telomerase-immortalized microvascular endothelial cell line (TIME). However, analysis of protein expression by flow cytometry revealed expression of lymphatic markers on these cell lines. Furthermore, functional in vitro leukocyte transmigration assays demonstrated deficiencies in several steps of the leukocyte extravasation cascade. Hence we performed this microarray analysis of the gene expression in HMEC-1 and TIME. We then compare the expression profiles to those of published blood- and lymphatic endothelial cells. Analysis of the gene expression profile of the immortalized human endothelial cell lines HMEC-1 and TIME to be compared to published primary blood- and lymphatic endothelial cells (see supplementary file linked below).
Project description:Intra- and extracellular metabolomics dataset of human dermal blood endothelial cells (HDBECs), human umbilical vein endothelial cells (HUVECs), human dermal lymphatic endothelial cells (HDLECs) and intestinal lymphatic endothelial cells (iLECs) in proliferation and quiescence.
Project description:Untargeted proteomics dataset of human dermal blood endothelial cells (HDBECs), human umbilical vein endothelial cells (HUVECs), human dermal lymphatic endothelial cells (HDLECs) and intestinal lymphatic endothelial cells (iLECs) in proliferation and quiescence.
Project description:Extracellular Vesicles (EVs) are crucial mediators of cell-to-cell communication in physiology but also in pathological conditions. Specifically, EVs released from the vasculature into blood were found to be quantitatively and qualitatively different in diseases versus healthy states. However, our understanding on EVs derived from the lymphatic system is still scarce. In this study we compared the mRNA and miRNA expression in blood vascular (BEC) and lymphatic (LEC) endothelial cells. After characterization of the EVs by fluo-triggered flow cytometry, nanoparticle tracking analysis and cryo-EM we utilized small RNA-sequencing to characterize miRNA signatures in the EVs and thereof identify cell-type specific miRNAs in BEC and LEC. We believe that our data provide a solid basis for further functional in vitro and in vivo studies addressing the role of EVs in the blood and lymphatic vasculature.
Project description:Extracellular Vesicles (EVs) are crucial mediators of cell-to-cell communication in physiology but also in pathological conditions. Specifically, EVs released from the vasculature into blood were found to be quantitatively and qualitatively different in diseases versus healthy states. However, our understanding on EVs derived from the lymphatic system is still scarce. In this study we compared the mRNA and miRNA expression in blood vascular (BEC) and lymphatic (LEC) endothelial cells. After characterization of the EVs by fluo-triggered flow cytometry, nanoparticle tracking analysis and cryo-EM we utilized small RNA-sequencing to characterize miRNA signatures in the EVs and thereof identify cell-type specific miRNAs in BEC and LEC. We believe that our data provide a solid basis for further functional in vitro and in vivo studies addressing the role of EVs in the blood and lymphatic vasculature.