Genome-wide Analysis Reflects Novel 5-Hydroxymethylcytosines Implicated in Diabetic Nephropathy
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE186021 | GEO | 2022/03/31
REPOSITORIES: GEO
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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.
2016-11-03 | E-MTAB-4166 | biostudies-arrayexpress
Project description:To identify the potential regulators in the progression of diabetic nephropathy (DN), we performed RNA sequencing of blood samples from healthy volunteers, patients with T2D, and patients with DN. Further analyses revealed that FTO was significantly downregulated in blood samples of T2D and DN patients, while the expression of other erasers, writers or readers remained unchanged between disease and healthy groups . Our study thus provides potential molecular mechanisms for DN progression and association of differential gene expression with the functional and structural changes observed in patients with DN.
2024-01-13 | GSE154881 | GEO
Project description:Genome-wide Analysis Reflects Novel 5-Hydroxymethylcytosines Implicated in Diabetic Nephropathy
| PRJNA771705 | ENA
Project description:Diabetic nephropathy (DN) is a leading cause of ESRD worldwide, but its molecular pathogenesis is not well-defined and there are no specific treatments. In humans, there is a strong genetic component determining susceptibility to DN. However, specific genes controlling DN susceptibility in humans have not been identified. Here we describe a new mouse model, combining type 1 diabetes with activation of the renin angiotensin system (RAS), which develops robust kidney disease with features resembling human DN: heavy albuminuria, hypertension and glomerulosclerosis. Additionally, there is a powerful effect of genetic background regulating susceptibility to nephropathy. The 129 strain is susceptible to kidney disease, whereas the C57BL/6 strain is resistant. To examine the molecular basis of this differential susceptibility, we analyzed the glomerular transcriptome of young mice with albuminuria but without detectable alterations in glomerular structure. We find dramatic difference in regulation of immune and inflammatory pathways with up-regulation of pro-inflammatory pathways in the susceptible (129) strain and coordinate down-regulation in the resistant (C57BL/6) strain, compared to their respective baselines. Many of these pathways were also up-regulated in a rat model and in humans with DN. Our studies suggest that genes controlling inflammatory responses, triggered by hyperglycemia and hypertension, may be critical early determinants of susceptibility to DN. The analysis was carried out on 2 strains of mice (129/SvEv and C57BL/6), each involving 2 genotypes (wild-type and RenTg/Ins2Akita mutations). Four replicates were used for each strain-genotype (with the exception of 129/SvEv wild-type mice, which had 3 replicates).
2016-08-13 | E-GEOD-85569 | biostudies-arrayexpress
Project description:Diabetic nephropathy (DN) is a leading cause of ESRD worldwide, but its molecular pathogenesis is not well-defined and there are no specific treatments. In humans, there is a strong genetic component determining susceptibility to DN. However, specific genes controlling DN susceptibility in humans have not been identified. Here we describe a new mouse model, combining type 1 diabetes with activation of the renin angiotensin system (RAS), which develops robust kidney disease with features resembling human DN: heavy albuminuria, hypertension and glomerulosclerosis. Additionally, there is a powerful effect of genetic background regulating susceptibility to nephropathy. The 129 strain is susceptible to kidney disease, whereas the C57BL/6 strain is resistant. To examine the molecular basis of this differential susceptibility, we analyzed the glomerular transcriptome of young mice with albuminuria but without detectable alterations in glomerular structure . We find dramatic difference in regulation of immune and inflammatory pathways with up-regulation of pro-inflammatory pathways in the susceptible (129) strain and coordinate down-regulation in the resistant (C57BL/6) strain, compared to their respective baselines. Many of these pathways were also up-regulated in a rat model and in humans with DN. Our studies suggest that genes controlling inflammatory responses, triggered by hyperglycemia and hypertension, may be critical early determinants of susceptibility to DN.
2016-08-13 | GSE85569 | GEO
Project description:BACKGROUND: Long-term complications of type 2 diabetes (T2D), such as macrovascular and microvascular events, are the major causes for T2D-related disability and mortality. A clinically convenient, non-invasive approach for monitoring the development of these complications would improve the overall life quality of patients with T2D and help reduce healthcare burden through preventive interventions. METHODS: A selective chemical labeling strategy for 5-hydroxymethylcytosines (5hmC-Seal) was used to profile genome-wide 5hmCs, an emerging class of epigenetic markers implicated in complex diseases including diabetes, in circulating cell-free DNA (cfDNA) from a collection of Chinese patients (n = 62). Differentially modified 5hmC markers between patients with T2D with and without macrovascular/microvascular complications were analyzed under a case-control design. RESULTS: Statistically significant changes in 5hmC markers were associated with T2D-related macrovascular/microvascular complications, involving genes and pathways relevant to vascular biology and diabetes, including insulin resistance and inflammation. A 16-gene 5hmC marker panel accurately distinguished patients with vascular complications from those without (testing set: AUC = 0.85, 95%CI, 0.73-0.96), outperforming conventional clinical variables such as urinary albumin. In addition, a separate 13-gene 5hmC marker panel could distinguish patients with single complications from those with multiple complications (testing set: AUC = 0.84, 95%CI, 0.68-0.99), showing superiority over conventional clinical variables. CONCLUSIONS: The 5hmC markers in cfDNA reflected the epigenetic changes in patients with T2D who developed macrovascular/microvascular complications. The 5hmC-Seal assay has the potential to be a clinically convenient, non-invasive approach that can be applied in the clinic to monitor the presence and severity of diabetic vascular complications.
2020-01-31 | GSE125929 | GEO
Project description:Urinary proteome was analyzed and quantified by Tandem Mass Tag (TMT) labeling followed by bioinformatics analysis to study DN pathophysiology and to identify biomarkers of clinical outcome. We included type 2 diabetic normotensive non-obese males with and without incipient DN (microalbuminuria). Sample collection included blood and urine at baseline (control and DN-basal) and, in DN patients, after 3 months of losartan treatment (DN-treated). Urinary proteome analysis identified 166 differentially abundant proteins between controls and DN patients, 27 comparing DN-treated and DN-basal patients, and 182 between DN-treated patients and controls. Mathematical modeling analysis identified 80 key proteins involved in DN pathophysiology, 15 in losartan effect and 7 of these 95 are essential in both processes. VCAM-1 and neprilysin are the only ones that are differentially expressed in the urinary proteome. We observed an increase of VCAM-1 urine levels in DN-basal patients compared to diabetic controls and an increase of urinary neprilysin in DN-treated patients with persistent albuminuria, the latter confirmed by ELISA . Our results point to neprilysin and VCAM-1 as potential candidates in DN pathology and treatment.
2018-05-22 | PXD009303 | Pride
Project description:Diabetic Nephropathy (DN) is a chronic complication of diabetes and the primary cause of end stage renal disease. DN can be differentially diagnosed only through histological investigation. Therefore, there is need for molecular biomarkers, such as miRNAs, to discriminate among different histological lesions in diabetics. Aim of this study was to identify a pattern of differentially expressed miRNAs in kidney biopsies of DN patients and to assess their potential as differential diagnostic biomarkers. Using microarray, we assayed miRNA expression in kidney tissue from 8 DN patients, 6 diabetic patients with membranous nephropathy and 4 patients with normal histology. Nine miRNAs were differentially expressed among the three groups of patients, thus underlying their potential role as markers of specific histological damage. In silico we identified 2 miRNAs (i.e., miR-27b-3p and miR-1228-3p) showing an interaction with UBE2v1, an ubiquitin-conjugating E2 enzyme variant that mediates the formation of lysine 63-linked ubiquitin chains, a mechanism we showed as involved in DN kidney fibrosis. Both miRNAs were confirmed to be down-regulated in DN biopsies, using qPCR and in situ hybridization, and in urines of DN patients. Interestingly, the urinary levels of both miRNAs were also able to discriminate among different degrees of renal fibrosis. Finally, we showed that the combined urinary expression of both miRNAs was also able to discriminate DN patients from other glomerulonephritides, both in the presence and absence of T2D. We identified two regulatory miRNAs potentially useful as diagnostic biomarkers of tubular-interstitial fibrosis in diabetic patients with DN.
2019-08-21 | GSE51674 | GEO
Project description:Validation of predicted gene expression of human mesangial cells after 24h Tacrolimus stimulus Objective: To evaluate tacrolimus as therapeutic option for diabetic nephropathy (DN) based on molecular profile and network-based molecular model comparisons. Materials and Methods: We generated molecular models representing pathophysiological mechanisms of DN and tacrolimus mechanism of action (MoA) based on literature derived data and transcriptomics datasets. Shared enriched molecular pathways were identified based on both model datasets. A newly generated transcriptomics dataset studying the effect of tacrolimus on mesangial cells in vitro was added to identify mechanisms in DN pathophysiology. We searched for features in interference between the DN molecular model and the tacrolimus MoA molecular model already holding annotation evidence as diagnostic or prognostic biomarker in the context of DN. Results: Thirty nine molecular features were shared between the DN molecular model, holding 252 molecular features and the tacrolimus MoA molecular model, holding 209 molecular features, with six additional molecular features affected by tacrolimus in mesangial cells. Significantly affected molecular pathways by both molecular model sets included cytokine-cytokine receptor interactions, adherens junctions, TGF-beta signaling, MAPK signaling, and calcium signaling. Molecular features involved in inflammation and immune response contributing to DN progression were significantly downregulated by tacrolimus (e.g. the tumor necrosis factor alpha (TNF), interleukin 4, or interleukin 10). On the other hand, pro-fibrotic stimuli being detrimental to renal function were induced by tacrolimus like the transforming growth factor beta 1 (TGFB1), endothelin 1 (EDN1), or type IV collagen alpha 1 (COL4A1). Conclusion: Patients with DN and elevated TNF levels might benefit from tacrolimus treatment regarding maintaining GFR and reducing inflammation. TGFB1 and EDN1 are proposed as monitoring markers to assess degree of renal damage. Next to this stratification approach, the use of drug combinations consisting of tacrolimus in addition to ACE inhibitors, angiotensin receptor blockers, TGFB1- or EDN1-receptor antagonists might warrant further studies. comparison of gene expression of human mesangial cells after 24h Tacrolimus vs. Ctrl; 4 independent experiments were conducted (4xTacrolimus 24h and 4x ctrl. 24h with Drug solvent (DMSO))
2016-08-01 | E-GEOD-84908 | biostudies-arrayexpress
Project description:Diabetic nephropathy (DN) is the leading cause of end-stage renal disease (ESRD), however, the detail mechanisms remain unclear. Here, we integrated the transcriptomics and proteomics profiles of glomeruli isolated from 50 biopsy-proven DN patients and 25 controls to explore the new discoveries underlying the pathogenesis of DN. First, 1,152 genes were differentially expressed at mRNA or protein level, and 364 of them showed strong correlation. Those strong correlated genes were divided into four different functional modules, including energy metabolism processes, extracellular matrix organization and cell adhesion, mRNA metabolism and protein translation, immune system and inflammation. In addition, a transcription factors (TFs) - target genes (TGs) regulatory network was constructed, among which 30 TFs up-regulated at protein levels and 265 downstream TGs were differentially expressed at the mRNA levels. Those TFs constitute the integration centers of different signal transduction pathways, and have great therapeutic potential in controlling the abnormal expression of TGs and the pathological process of DN. Furthermore, 29 new DN-specific splice-junction peptides with high confidence were identified, which may exert novel roles in the pathological progression of DN. So, our in-depth integrative transcriptomic-proteomic analysis provided deeper insights into the pathogenesis of DN and opened the potential avenue for finding new therapeutic interventions in DN.
2023-03-06 | PXD040617 |