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Identification and Validation of Hub Genes in Drug Induced Acute Kidney Injury Basing on Integrated Transcriptomic Analysis

ABSTRACT: In this study, RNA-seq was used to detect mRNA changes in DI-AKI cell models induced by three drugs (Iohexol, cisplatin and vancomycin), and was analyzed and validated to screen key hub genes and specific biomarkers for DI-AKI.

ORGANISM(S): Homo sapiens

PROVIDER: GSE227970 | GEO | 2023/03/27

REPOSITORIES: GEO

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Proteomic analysis of cisplatin exposure on the kidney cortex proteome and the effect of preconditioning

Project description:Acute kidney injury and nephrotoxicity are important clinical side effects of cisplatin. Thus, the mechanisms of this disease, and potential treatment options are important to understand in their entity. Here, we analyzed the proteome of cisplatin induced acute kidney injury in a mouse model. Functionally we found that calorie restriction was able to completely blunt Cisplatin induced AKI, and hypoxia ameliorated cCisplatin induced AKI. To investigate the mechanism for this in high throughput, we performed label-free single-shot proteomic analyses of these kidneys.Acute kidney injury and nephrotoxicity are important clinical side effects of cisplatin. Thus, the mechanisms of this disease, and potential treatment options are important to understand in their entity. Here, we analyzed the proteome of cisplatin induced acute kidney injury in a mouse model. Functionally we found that calorie restriction was able to completely blunt Cisplatin induced AKI, and hypoxia ameliorated cCisplatin induced AKI. To investigate the mechanism for this in high throughput, we performed label-free single-shot proteomic analyses of these kidneys.

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Mice kidney tissue: control vs. acute kidney injury

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Project description:Acute kidney injury (AKI) remains a major global healthcare problem and there is a need to develop human-based models to study AKI in vitro. Towards this goal, we have characterized induced pluripotent stem cell-derived human kidney organoids and their response to cisplatin, a chemotherapeutic drug that induces AKI and preferentially damages the proximal tubule. We found that a single treatment with 50 µM cisplatin induces HAVCR1 and CXCL8 expression, DNA damage (γH2AX) and cell death in the organoids in a dose-dependent manner but greatly impairs organoid viability. DNA damage was not specific to the proximal tubule but also affected the distal tubule and interstitial cell populations. This lack of specificity correlated with low expression of the proximal tubule-specific SLC22A2/OCT2 transporter for cisplatin. To improve viability, we developed a repeated low-dose regimen of 4x 5 µM cisplatin over 7 days and found this causing less toxicity while still inducing a robust AKI response that included secretion of known AKI biomarkers and inflammatory cytokines. This work validates the use of human kidney organoids to model aspects of AKI, with the potential to identify new AKI biomarkers and develop better therapies.

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Identification and Validation of Hub Genes in Drug Induced Acute Kidney Injury Basing on Integrated Transcriptomic Analysis

Project description:Identification and Validation of Hub Genes in Drug Induced Acute Kidney Injury Basing on Integrated Transcriptomic Analysis

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Targeted depletion of renal ALKBH7 by bismuth drug prevents cisplatin-induced acute kidney injury

Project description:Cisplatin is a potent chemotherapeutic drug widely used to treat cancers. Unfortunately, its overaccumulation in kidney proximal tubular cell (PTC) shuts down fatty acid oxidation, resulting in cell necrosis and acute kidney injury (AKI). Bismuth drugs have long been used to treat gastrointestinal tract disorder and Helicobacter pylori infection. Interestingly, bismuth drugs also mitigate cisplatin-induced AKI, but the underlying mechanism remains unknown. In this study, we found 50nM bismuth specifically reduces cisplatin-induced cell necrosis. Using multiomics and protein-small molecule interaction techniques, we identified mitochondrial protein ALKBH7 as a specific target of bismuth. And ALKBH7 is depleted upon bismuth treatment. Bismuth treatment and ALKBH7 knockdown shared a proteomic similarity in suppressing programmed necrosis and promoting fatty acid metabolism. By gene knockout and silencing, we showed ALKBH7 depletion indeed greatly mitigates cisplatin-induced cell necrosis. We further demonstrated bismuth specifically depletes renal ALKBH7, prevents cisplatin-induced AKI and greatly increases survival rate in mice. Overall, we conclude ALKBH7 is specific target of bismuth drugs, and ALKBH7 depletion suppresses cisplatin-induced PTC necrosis and prevents AKI by preserving fatty acid metabolism.

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Transcriptomic dataset after cisplatin induced acute kidney injury

Project description:Cisplatin-induced acute kidney injury (AKI) is one of the most common and severe side effects and can prevent the use of this important agent. Unfortunately, preventive or therapeutic tools to address cisplatin-induced AKI are lacking. Interestingly, in the last decades a row of preconditioning strategies that employ the activation of cellular stress resistance pathways have been shown to be promising approaches to protect from organ injury in rodent models. Here, we characterized both the protective potential and the underlying molecular patterns of two strategies – caloric restriction and hypoxic preconditioning – in mice treated with cisplatin.

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Project description:We aimed to investigate the therapeutic effects and mechanisms of Yishen Jiangzhuo decoction (YSJZD) in a mouse model of cisplatin-induced acute kidney injury (AKI). The mice were divided into the NC, cisplatin, and cisplatin + YSJZD groups. A concentration-dependent effect of YSJZD on cisplatin-induced AKI was observed, and the optimal concentration for intervention was calculated. Changes in blood urea nitrogen and serum creatinine levels combined with hematoxylin & eosin and periodic acid-Schiff staining, and transmission electron microscopy observations indicated that YSJZD enhanced renal function, reduced pathological injury, and protected renal tubular epithelial cells in cisplatin-induced AKI mice. The results of the transcriptomic and enrichment analyses showed that the mechanisms of YSJZD may be associated with inflammation, oxidation, apoptosis, and the TNF signal pathway. Immunofluorescence, oxidative stress index, terminal deoxynucleotidyl transferase dUTP nick end labeling assay, and western blotting (WB) revealed that YSJZD downregulated apoptosis in the renal tissues of AKI mice, and further decreased the expression levels of p-p65, p-p38 MAPK, tumor necrosis factor -α, cleaved-caspase-3, and malondialdehyde, while increasing the levels of SIRT3, GSH, and SOD. Overall, the results showed that YSJZD could effectively abrogate cisplatin-induced AKI in mice through mechanisms primarily related to its anti-inflammatory, antioxidative, and antiapoptotic effects by inhibited the TNF signal pathway. YSJZD warrants further investigation as a clinical empirical prescription.

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