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Deubiquitinase OTUB1 regulates doxorubicin-induced cardiotoxicity

ABSTRACT: Deubiquitinase OTUB1 regulates doxorubicin-induced cardiotoxicity

PROVIDER: PRJNA1005939 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR25655338_1.fastq.gz	Fastqsanger.gz
	SRR25655338_2.fastq.gz	Fastqsanger.gz
	SRR25655339_1.fastq.gz	Fastqsanger.gz
	SRR25655339_2.fastq.gz	Fastqsanger.gz
	SRR25655340_1.fastq.gz	Fastqsanger.gz

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Deubiquitinase OTUB1 regulates doxorubicin-induced cardiotoxicity

Project description:Wild-type (WT) and Otub1-heterozygously knock-out mice were applied in the study. Doxorubicin (DOX)-induced subacute cardiotoxicity mouse model was established by 6 intraperitoneal injections during a 2-week period. The differentially expressed genes were analyzed by RNA-sequencing and clustering analyses.

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FIH regulates cellular metabolism through hydroxylation of the deubiquitinase OTUB1.

Project description:The asparagine hydroxylase, factor inhibiting HIF (FIH) confers oxygen-dependence upon the hypoxia-inducible factor (HIF), a master regulator of the cellular adaptive response to hypoxia. Studies investigating whether asparagine hydroxylation is a general regulatory oxygen-dependent modification have identified multiple non-HIF targets for FIH. However the functional consequences of this outside of the HIF pathway remain unclear. Here, we demonstrate that the deubiquitinase ovarian tumor domain containing, ubiquitin aldehyde binding protein 1 (OTUB1) is a substrate for hydroxylation by endogenous FIH on N22. Mutation of N22 leads to a profound change in the interaction of OTUB1 with proteins important in cellular metabolism. Furthermore, mutant OTUB1 (lacking the hydroxylation site) impairs cellular metabolic processes when compared to wild type. Based on these data, we hypothesize that OTUB1 is a target for functional hydroxylation by FIH, and propose that this provides new insight into the regulation of cellular energy metabolism during hypoxia.

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SET7 methylates the deubiquitinase OTUB1 at Lys 122

Project description:SET7 methylates the deubiquitinase OTUB1 at Lys 122

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FIH regulates cellular metabolism through hydroxylation of the deubiquitinase OTUB1.

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Targets of miR-212/132 in doxorubicin-induced cardiotoxicity

Project description:We overexpressed miR-212/132 by AAV9 in mouse model of doxorubicin-induced cardiotoxicity and wanted to identify myocardial targets of miR-212/132 in this model.

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Project description:The study used wild type (WT) and Baz2b-knockout (KO) mice to establish a subacute doxorubicin (DOX)-induced cardiotoxicity model by intraperitoneal injection for 6 times in 2 weeks. Mice injected with equivalent PBS were used as the control group.

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Transcriptomic analysis of folic acid effects in doxorubicin-induced cardiotoxicity

Project description:Doxorubicin (DOXO), a chemotherapeutic drug, is cardiotoxic. We hypothesized that folic acid is an effective therapeutic agent in a mouse model of DOXO-induced cardiotoxicity. We performed genome-wide expression profiling to identify the underlying mechanisms. Male C57Bl6 2-mo old mice received DOXO (1x20 mg/kg, ip) or saline (sham). FA (10 mg/d) or placebo (plac) was administered 7d before DOXO administration until the end of the experiment (10d).

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CRISPRi/a screen of doxorubicin induced cardiotoxicity

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Transcriptional analysis of doxorubicin-induced cardiotoxicity

Project description:Doxorubicin (Dox) is an effective chemotherapeutic agent against a broad range of tumors. However, a threshold dose of doxorubicin causes an unacceptably high incidence of heart failure and limits its clinical utility. We have established two models of doxorubicin cardiotoxicity in mice: 1) in an acute model, mice are treated with 15mg/kg of doxorubicin once; 2) in a chronic model, they receive 3mg/kg weekly for the first 12 of a total of 18 weeks. Using echocardiography, we have monitored left ventricular function of the mouse hearts during treatment in chronic model and seen the expected development of dilated cardiomyopathy (DCM). Treated mice showed histological abnormalities similar to those seen in patients with doxorubicin cardiomyopathy. To investigate transcriptional regulation in these models, we used a microarray we generated with over 5000 independent cDNA clones from murine heart and skeletal muscle. We have identified genes that respond to doxorubicin exposure in both model systems, and confirmed these results using real-time PCR. In the acute model, a set of genes is regulated early and rapidly returns to baseline levels, consistent with the half-life of doxorubicin. In the chronic model, which mimics the clinical situation much more closely, we identified dysregulated genes that implicate specific mechanisms of cardiac toxicity and may serve as biomarkers of doxorubicin induced dilated cardiomyopathy. Keywords: time course

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