Homo sapiens
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA188223 | ENA |
REPOSITORIES: ENA
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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)
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Project description:In this study, we examined the impact of modulating the TGF-β/PAI-1 axis in CD34+ cells function from diabetic patients and controls. Using gene array studies, we found that diabetics, protected from microvascular complications despite suboptimal glycemic control, had reduced level of TGF- β1 and PAI-1 transcripts in their CD34+ cells compared to age, sex, duration and degree of glycemic control -matched diabetics with microvascular complications. Treatment with neutralizing antibody to TGF- β1 in murine hematopoietic stem cells (HSC) enhanced in vivo repopulation potential of these cells in bone marrow transplantation; reduced the time required for cell division of single cells, increased survival of the progenitor cells and reduced TGF-β1 expression. TGF- β1 phosphorodiamidate morpholino oligomers (PMO) treatment reduced PAI-1 mRNA expression in diabetic (p<0.01) and non-diabetic (p=0.05) CD34+ cells. Inhibition of PAI-1 promoted CD34+ cell proliferation and migration in vitro.Targetting TGFβ-1/PAI-1 system offers a promising therapeutic strategy for restoring vascular reparative function in diabetic CD34+ cells and hematopoietic stem cells, enhancing key functions needed for cell therapy. Peripheral blood from either age matched controls (n=5), diabetics with long standing poorly controlled diabetes and no microvascular complications (n=4), and diabetics with long-standing poorly controlled diabetes with severe microvascular complications (n=5) was obtained and CD34+ cells were isolated. RNA was extracted followed by AffyNugen amplification, and the cDNA was probed to Human RSTA Affymetrix 2.0 chip
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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.
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