ABSTRACT: Gene expression profiling in glomeruli from human kidneys with diabetic nephropathy Keywords = Diabetes Keywords = kidney Keywords = glomeruli Keywords: other
Project description:Gene expression profiling in glomeruli from human kidneys with diabetic nephropathy Keywords = Diabetes Keywords = kidney Keywords = glomeruli Keywords: other. This dataset is part of the TransQST collection.
Project description:Transcriptome comparison of glomeruli from kidneys with diabetic nephropathy (DN) and glomeruli from the unaffected portion of tumor nephrectomies. Transcritomics profile of glomeruli in DN patients explored SRGAP2 was strongly associated with proteinuria and involved in podocyte cytoskeleton organization
Project description:There is a temporal window from the time diabetes is diagnosed to the appearance of overt kidney disease during which time the disease progresses quietly without detection. Currently, there is no way to detect early diabetic nephropathy (EDN). Here we performed an unbiased assessment of gene-expression analysis of postmortem human kidneys using microarrays to identify candidate genes that may contribute to EDN.
Project description:Diabetic nephropathy is a major cause of end-stage renal disease. Kidney podocytes play a central role in the pathogenesis of diabetic nephropathy. With their intercellular contacts they assemble part of the kidney filter. Many molecular mechanisms of the pathogenesis of diabetic nephropathy are not elucidated and targeted therapies are lacking. Nephron-specific TrkCknockout (TrkC-KO) and TrkC overexpressing mice exhibit features of diabetic nephropathy such as enlarged glomeruli with mesangial proliferation, basement membrane thickening, albuminuria and podocyte loss when aging. Insulin-like growth factor 1 receptor (Igf1R)- associated gene expression was regulated in TrkC-KO mice glomeruli by qPCR. Phosphoproteins associated with insulin, erb-b2 receptor tyrosine kinase (Erbb) and Toll-like receptor signaling were enriched in lysates of podocytes treated with the TrkC ligand neurotrophin-3(Nt-3) in a mass spectrometry analysis. Activation of TrkC by Nt-3 resulted in phosphorylation of the Igf1R on activating tyrosine residues in podocytes. Our results identify TrkC to be a potentially targetable mediator of diabetic nephropathy.
Project description:We investigated the gene expression profiles of RNA isolated from kidney glomeruli from aged, 25 week old type-2 diabetic (db/db) and non-diabetic mice. In order to investigate the consequences of hyperglycemia on the pathogenesis and progression of diabetic nephropathy Kidney glomeruli from 3 diabetic and 3 non-diabetic, control mice were isolated and RNA purified for RNA-Seq analysis on the Illumina HiSeq 2000. The goal of the project was to generate comprehensive list of noncoding RNA genes differentially regulated between the two conditions in order to identify novel targets for further study.
Project description:Urinary exosomal miRNA profiling was conducted in urinary exosomes obtained from 8 healthy controls (C), 8 patients with type II diabetes (T2D) and 8 patients with type II diabetic nephropathy (DN) using Agilent´s miRNA microarrays.
Project description:The transcription factor c-Maf has been widely studied and has been reported to play a critical role in embryonic kidney development; however, the postnatal functions of c-Maf in adult kidneys remain unknown as c-Maf null C57BL/6J mice exhibit embryonic lethality. In this study, we investigated the role of c-Maf in adult mouse kidneys by comparing the phenotypes of tamoxifen (TAM)-inducible c-Maf knockout mice (c-Maf flox/flox; CAG-Cre-ERTM mice named “c-Maf ΔTAM”) with that of c-Maf flox/flox control mice, 10 days after TAM injection (TAM(10d)). In addition, we examined the effects of c-Maf deletion on diabetic conditions by injecting the mice with streptozotocin (STZ), 4 weeks before TAM injection. c-Maf ΔTAM mice displayed primary glycosuria caused by Sglt2 and Glut2 downregulation in the kidneys without diabetes, as well as morphological changes and life-threatening injuries in the kidneys on TAM(10d). Under diabetic conditions, c-Maf deletion promoted recovery from hyperglycemia and suppressed albuminuria and diabetic nephropathy by causing similar effects as did Sglt2 knockout and SGLT2 inhibitors. In addition to demonstrating the unique gene regulation of c-Maf, these findings highlight the renoprotective effects of c-Maf deficiency under diabetic conditions and suggest that c-Maf could be a novel therapeutic target gene for treating diabetic nephropathy.
Project description:Comparing glomerular gene expression level between mice with different susceptibilities to diabetic nephropathy, DBA/2 (susceptible) and C57BL/6 (resistant) mice, respectively. The hypothesis is that differential expression of glomerular genes regulate susceptibility to diabetic nephropathy. The results show immune related genes. Thus, glomerular inflammation may increase susceptibility to diabetic nephropathy in mice. RNA isolated from kidney glomeruli of DBA/2 and C57BL/6 mice, with or without 4 weeks diabetes induced by streptozotocin.
Project description:Although diabetic nephropathy (DN) is the most common cause for end-stage renal disease (ESRD) in western societies, its pathogenesis still remains largely unclear. A different gene pattern of diabetic and healthy kidney cells is one of the probable explanations. Numerous signaling pathways have emerged as important pathophysiological mechanisms for diabetes-induced renal injury. Glomerular cells, as podocytes or mesangial cells, are predominantly involved in the development of diabetic renal lesions. While a lot of gene assays concerning DN are performed with whole kidney or renal cortex tissue, we isolated glomeruli from BTBR ob/ob and wildtype mice at 4 different timepoints (4, 8, 16, 24 weeks) and performed a mRNA microarray to identify differentially expressed genes (DEGs). In contrast to many other diabetic mouse models, these homozygous ob/ob leptin-deficient mice do not only develop a severe type II diabetes, but also diabetic kidney injury with all the clinical and especially histologic features defining human DN. The identified DEGs in diabetic glomeruli were used to investigate biological processes and pathways enriched at different disease stages.