Mouse kidney after systemic endotoxin challenge
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE30576 | GEO | 2011/07/12
SECONDARY ACCESSION(S): PRJNA144643
REPOSITORIES: GEO
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Project description:8 week-old male C57BL6J mice were given Gram-negative endotoxin (LPS O111:B4, 10 mg/kg) intraperitoneally at time 0. 18 hrs thereafter, they were administered 10 ml/kg 0.9% saline. Mice were sacrificed at 0, 18, or 42 hrs after LPS challenge. Kidneys were immediately collected into TRIzol for RNA preparation. Renal function was measured on blood collected at the time of tissue harvest At t=0hr, mice had normal baseline renal function. At t=18hr, mice exhibited early renal injury, At t=42hr, mice had either recovered normal renal function or had persistent renal injury. We collected kidneys from 3 mice per time point. For the 42 hr time point, we collected kidneys from 3 mice with recovered renal function and kidneys from 3 mice with persistent renal injury. Mouse kidneys selected at successive stages of renal injury and recovery following systemic LPS challenge and volume resuscitation following LPS challenge.
2011-07-12 | E-GEOD-30576 | biostudies-arrayexpress
Project description:Time course experiments involving bilateral renal ischemia reperfusion injury (IRI) in C57BL/6J mice (0 hr control, 20 min bilateral ischemia without reperfusion, 4, 16, 24, 36, 48, and 72 hrs post IRI). This dataset also includes IRI at 48 hrs and 72 hrs in Azin1 A-to-I locked and Azin1 A-to-I uneditable mice.
2024-09-30 | GSE267650 | GEO
Project description:Congenital obstructive nephropathy is a common cause of chronic kidney disease and a leading indication for renal transplant in children. The cellular and molecular responses of the kidney to congenital obstruction are incompletely characterized. In this study, we evaluated global transcription in kidneys with graded hydronephrosis in the megabladder (mgb-/-) mouse to better understand the pathophysiology of congenital obstructive nephropathy. Three primary pathways associated with kidney remodeling/repair were induced in mgb-/- kidneys independent of the degree of hydronephrosis. These pathways included retinoid signaling, steroid hormone metabolism, and renal response to injury. Urothelial proliferation and the expression of genes with roles in the integrity and maintenance of the renal urothelium were selectively increased in mgb-/- kidneys. Ngal/Lcn2, a marker of acute kidney injury, was elevated in 36% of kidneys with higher grades of hydronephrosis. Evaluation of Ngalhigh versus Ngallow kidneys identified the expression of several novel candidate markers of renal injury. This study indicates that the development of progressive hydronephrosis in mgb-/- mice results in renal adaptation that includes significant changes in the morphology and potential functionality of the renal urothelium. These observations will permit the development of novel biomarkers and therapeutic approaches to progressive renal injury in the context of congenital obstruction. Gene expression was measured in control, mild, moderate and severely hydronephrotic megabladder mouse kidneys. A total of 6 control kidneys were compared to 18 mutant kidneys from age-matched male animals.
2013-06-18 | E-GEOD-48041 | biostudies-arrayexpress
Project description:TLR4 deficiency attenuates kidney injury after ischemic reperfusion as measured by both renal function and morphology. To better understand the role of TLR4 during the acute kidney injury, we used DNA microarray to identify genes that were differentially expressed on kidneys in wildtype B10 mice and TLR4 null mice during the early stage of injury.
2012-08-15 | GSE34351 | GEO
Project description:Tissue inhibitors of metalloproteinases (TIMP) are endogenous inhibitors of matrix metalloproteinases (MMP). While TIMP2 and TIMP3 inhibit MMPs, TIMP3 also inhibits activation of pro-MMP2 whereas TIMP2 promotes it. Here we assessed the differential role of TIMP2 and TIMP3 in renal injury using the unilateral ureteral obstruction model. Gene microarray assay showed that post-obstruction, the lack of TIMP3 had a greater impact on gene expression of intermediate, late injury- and repair-induced transcripts, kidney selective transcripts and solute carriers. Renal injury in TIMP3-/-, but not in TIMP2-/- mice increased expression of collagen type I/III, connective tissue growth factor, transforming growth factor-β and the downstream Smad2/3 pathway. Interestingly, ureteral obstruction markedly increased MMP2 activation in the kidneys of TIMP3-/- mice which was completely blocked in the kidneys of TIMP2-/- mice. These changes are consistent with enhanced renal tubulointerstitial fibrosis in TIMP3-/- and its reduction in TIMP2-/- mice. The activity of tumor necrosis factor-α converting enzyme, caspase-3 and mitogen activated kinases were elevated in the kidneys of TIMP3-/- but not TIMP2-/- mice, suggesting enhanced activation of apoptotic and pathological signaling pathways only in the obstructed kidney of TIMP3-/- mice. Thus, TIMP2 and TIMP3 play differential and contrasting roles in renal injury, TIMP3 protects from damage whereas TIMP2 promotes injury through MMP2 activation. Kidneys from the wild type (WT), TIMP2-/- and TIMP3-/- mice undergoing sham or unilateral ureteral obstruction (UUO) procedures
2013-07-01 | E-GEOD-42303 | biostudies-arrayexpress
Project description:TLR4 deficiency attenuates kidney injury after ischemic reperfusion as measured by both renal function and morphology. To better understand the role of TLR4 during the acute kidney injury, we used DNA microarray to identify genes that were differentially expressed on kidneys in wildtype B10 mice and TLR4 null mice during the early stage of injury. A murine ischemic reperfusion injury model was established. After right nephrectomy, the left pedicle was clamped for 23min followed by 4hr reperfusion. Sham mice were used as controls. 6 WT males and 6 TLR4 null males were included with 3 ischemic and 3 shams in each group.
2012-08-15 | E-GEOD-34351 | biostudies-arrayexpress
Project description:Circadian rhythmicity in renal function suggests a requirement for circadian adaptations in renal metabolism. We studied circadian changes in renal metabolic pathways using integrated transcriptomic, proteomic and metabolomic analysis performed on control mice and mice deficient in the circadian clock gene Bmal1 in the renal tubule (cKOt mice). Proteins were extracted from whole kidneys of 60 mice. Of these, 30 were conditional knockouts of Arntl (Bmal1) and 30 were of control genotype. They were housed under 12-hours light/12-hours dark cycles and were sacrificed at six different time points: zeitgeber time ZT 0, ZT 4, ZT 8, ZT 12, ZT 16, ZT 20 ( ZT 0 being the time of light on and ZT 12 the time of light off). Five replicates per genotype and time point were analysed.
2023-03-15 | PXD036803 | Pride
Project description:Our previous study has showed Ten-eleven translocation (Tet2) gene expression as well as the global 5-hydroxymethylcytosine (5hmC) level were reduced significantly in mouse kidney insulted by ischemia reperfusion (IR). Here, we investigate the functional role of Tet2 in renal IR injury. We constructed renal IR injury model in wild type and Tet2 knockout (KO) mice. Serum creatinine (SCr) and blood urea nitrogen (BUN) were examined to evaluate renal function. HE staining and renal injury biomarkers were tested to confirm the degree of injury. Microarray analysis of mRNA expression levels was carried out to gain mechanistic insightinto the role of Tet2. We used microarrays to profile the transcriptomes of the kidneys from wildtype and Tet2 KO mice.
2018-07-12 | GSE116911 | GEO
Project description:Gene expression profiling of kidneys from the murine model of HIV-associated nephropathy (HIVAN) identified an association between the expression of an endoplasmic reticulum (ER)-associated protein reticulon-1, RTN1, and the severity of kidney disease. Of the three known RTN1 isoforms, only RTN1A protein expression was increased in kidneys of murine models of HIVAN, diabetic nephropathy (DN), and renal fibrosis and humans with HIVAN and DN. Both mRNA and protein expression of RTN1-A in the kidneys correlated inversely with estimated glomerular filtration rate (eGFR) in patients with DN. In kidney cells, RTN1 overexpression induced ER stress/apoptosis, whereas RTN1 knockdown attenuated tunicamycin-, and hyperglycemia-induced ER stress/apoptosis. Incubation of kidney cells with high glucose media induced RTN1A expression likely through oxidative pathway, while knockdown of RTN1A inhibited high glucose-induced apoptosis. RTN1A interacts with PERK and mutation of its N- or C-terminal domain abolished its effects on ER stress/apoptosis. In vivo, knockdown of Rtn1a expression either before or after kidney injury attenuated renal fibrosis in mice with unilateral ureteral obstruction (UUO) and tubular epithelial cell-specific knockdown of Rtn1a also ameliorated ER stress and renal fibrosis in the UUO mice. Finally, knockdown of Rtn1a also attenuated proteinuria, glomerular hypertrophy, and mesangial expansion in STZ-induced diabetic mice, which were associated with suppression of ER stress markers. Taken together, these data suggest that RTN1 is a mediator of kidney disease progression that exacerbates kidney injury through ER stress and apoptosis. Animal studies: All animal studies were approved by the IACUC committee of Mount Sinai School of Medicine. HIV-1 transgenic mice, Tg26, and their littermates were generated and genotyped as described. Only male heterozygous Tg26 in the FVB/N background were used in the study, because homozygous HIV-transgenic mice are not viable for more than few weeks postnatally. UUO and folic acid-induced nephropathy models were created as described . Mice were grouped as wild type, Tg26 with mild kidney injury, Tg26, with serious kidney injury. The kidneys were collected from these mice for histology, western blot, real-time PCR analysis, and microarray studies. Kidney disease was confirmed by measurement of proteinuria, renal function, and histologic analysis. Microarray studies: Affymetrix gene expression microarrays were performed at the Mount Sinai Institution Microarray Core Facility. The Affymetrix GeneChip® Mouse Genome 430 2.0 Array was used to profile gene expression in the kidney cortex of Tg26 and WT mice 37. One-way analysis of variance test (ANOVA) was applied to the dataset to identify the genes that were differentially expressed between the two groups. P-values were corrected using Benjamini–Hochberg false discovery rate (FDR) with a threshold of 0.05.
2015-05-20 | E-GEOD-69074 | biostudies-arrayexpress
Project description:Renal recovery following injury relies on cellular regeneration. In the mouse kidney following injury, injured epithelial cells undergoes de-differentiate, proliferate and re-differentiate into functional cells, following a a tightly controlled genetic programme where specific sets of genes are up-regulated. We used microarrays to detail the global programme of gene expression underlying cellular regeneration following injury with or without a HDAC inhibitor, m4PTB, treatment and identified distinct classes of up-regulated genes during this process. Male BALB/c mice underwent 26 minute unilateral ischemia-reperfusion (IR) with contralateral nephrectomy treated with vehicle or 100 mg/kg m4PTB 24 h after inducing renal injury, and kidneys harvested for RNA extraction 12 h later. We sought to obtain kidneys within a similar degree of injury in order to carefully evaluate the effect of m4PTB on expression profiles. To that end, we selected kidneys according to three different criteria of injury: (1) level of serum creatinine at Day1, (2) the level of blood urea nitrogen (BUN) (3) Kim1 expression by qPCR at Day1.5 using haevested kidneys
2013-03-01 | E-GEOD-42247 | biostudies-arrayexpress