Project description:One single-cell RNA transcriptomic dataset was originated from one wild-type mouse, which was harvested at 3 months after nephrotoxic nephritis model.
Project description:We induced acute nephritis by single injection of sheep nephrotoxic serum in mice and then treated the mice with prostaglandin E2. We used microarrays to examine the global gene expressions during recovery from nephrotoxic nephritis by prostaglandin E2. Acute nephristis was induced in female mice by single injection of sheep Nephortoxc Serum (NTS), followed by prostaglandin E2 administration daily starting from day 2 after NTS administration. Mice were sacrificed on day 7 and RNAs were isolated from kidney. The RNA samples were subjected to mouse gene 1.0 ST array analysis.
Project description:We induced acute nephritis by single injection of sheep nephrotoxic serum in mice and then treated the mice with prostaglandin E2. We used microarrays to examine the global gene expressions during recovery from nephrotoxic nephritis by prostaglandin E2.
Project description:Studying the differences in glycosylation in B cells of normal mice and mice with an autoimmune disease (nephrotoxic nephritis). Differences in glycosylation in B cells of normal mice and mice with an autoimmune disease (nephrotoxic nephritis) were studied via gene expression analysis. RNA from mouse resting spleen B cells and B cells stimulated with antiCD40, CpG, and IL4 for 5 days, was isolated and prepared. One sample for each class was prepared. RNA was labeled and hybridized to the GLYCOv3 array. Resulting Gene expression patterns were analyzed.
Project description:The goal of our study was to characterize glomerulus and particularly podocyte biology during MMF treatment in an immune-triggered proteinuric glomerulopathy. Therefore, nephrotoxic serum nephritis was induced in three-week old wild-type mice. On day 3, half of the mice were treated with MMF (100 mg/kgBW/d p.o.) (NTS+MMF) for one week, the other half of animals with vehicle (NTS+veh). A further group without induction and treatment served as controls (C). On day 10, we performed proteomic analysis of glomeruli.
Project description:ANCA-associated glomerulonephritis (AGN) associates with a high risk of end-stage kidneydisease. The role of kidney immune cells in local inflammation remains unclear. Herewe investigate kidney immune cell diversity and function. Kidney tissue from AGN patients (n=5) and a lupus nephritis (LN) patient (n=1) were aquired during a biopsy procedure for a clinical indication. Needle-core biopsies were obtained for histopathological examination, and an additional pass was performed to retrieve kidney tissue for scRNA-seq. Healthy kidney tissue (n=1) was obtained from a kidney that was surgically removed do tue due to a (non-invasive) papillary urothelial carcinoma. Immediately after collection, kidney tissue was processed into a single-cell suspension and sorted using a 4-color flow cytometry panel to isolate living, CD45+immune cells. To aid in the multi-omic characterization, surface markers and T and B cell repertoires were sequenced in 2 samples (1 AGN patient and the nephrectomy control). These samples were incubated with an oligo-antibody TotalSeq-C cocktail containing 130 unique cell surface antigens.
Project description:Purpose:We previously found that kidney-infiltrating T cells (KITs) in murine lupus nephritis (LN) resembled dysfunctional T cells that infiltrate tumors. This unexpected finding raised the question of how to reconcile the “exhausted” phenotype of KITs with ongoing tissue destruction in LN. Methods: we performed scRNA-seq and TCR-seq of KITs in murine lupus models using 10X Genomics Chromium system . Results: We found that CD8 KITs exist first in a transitional state, before clonally expanding and evolving toward exhaustion. On the other hand, CD4 KITs did not fit into current differentiation paradigms, but included both hypoxic and cytotoxic subsets with a pervasive exhaustion signature. Thus, autoimmune nephritis is unlike acute pathogen immunity; rather the kidney microenvironment suppresses T cells by progressively inducing exhausted states. Our findings suggest that lupus nephritis, a chronic condition, results from slow evolution of damage caused by dysfunctional T cells and their precursors on the way to exhaustion. These findings have implications for both autoimmunity and tumor immunology.
Project description:We aimed to identify miRNA biomarkers of renal injury in kidney biopsies from patients with lupus nephritis. MiRNA profiles of 8 patients were analyzed for correlation with various clinical features including Progression, Activity, Chronicity, and Time to Kidney Failure. MicroRNAs (miRs) are promising biomarkers and are involved in pathogenesis of kidney diseases. We aimed to identify miR biomarkers of renal injury in kidney biopsies from patients with lupus nephritis and study their potential role in renal fibrosis. miR-150 was significantly increased in kidneys with high chronicity compared to low chronicity and it correlated positively with chronicity index scores and renal collagen I expression. In kidneys with high chronicity, miR-150 was found predominantly in proximal tubular cells (PTCs) and was moderately expressed in podocytes and to lesser degree in mesangial cells (MCs). We hypothesized that miR-150 increases fibrosis by downregulating a negative regulator of profibrotic proteins. Suppressor of cytokine signaling1 (SOCS1) is a predicted target of miR-150 and has shown antifibrotic role. After confirming that SOCS1 is a direct target of miR-150, we showed that transfection of a miR-150 analog downregulated SOCS1 protein and upregulated the profibrotic proteins fibronectin, collagen I, collagen III, and TGF-β1 in both primary normal human renal PTCs and MCs. A similar effect was seen when using a SOCS1 siRNA to confirm that the effect of miR-150 on profibrotic proteins is mediated through SOCS1. Stimulation with TGF-β1 induced miR-150 increase in PTCs and human podocytes but not MCs. These results suggest that miR-150 might be a useful quantitative renal biomarker of kidney injury in lupus nephritis and that miR-150, which might be partially induced by TGF-β1, plays an important role in renal fibrosis by increasing profibrotic molecules through downregulation of SOCS1. FFPE kidney specimens (n=25) including baseline and repeated needle renal biopsies were from 14 patients with LN enrolled in IRB-approved protocols at the NIDDK between 1976 and 1999. The specimens were divided in two groups based on histological chronicity index (CI). CI ≥ 4 were categorized as having high degree of chronicity of chronic kidney injury. 18 kidneys from 8 patients including high CI (n=9) and low CI (n=9) were used for miR profiling by Affymetrix microRNA microarrays.