Analysis of MOF under stress conditions
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE70706 | GEO | 2015/07/10
SECONDARY ACCESSION(S): PRJNA289727
REPOSITORIES: GEO
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Project description:We analyzed the role of MOF in primary MEFs and differentiated podocytes in response to Adriamycin. Mof was deleted in MEFs using the Cre-ERT2 trasgene, while Mof was knockdown in podocytes using shRNA infection. Samples were treated with Adriamycin for 24 hours and gene expression changes analysed. Analysis of gene expression changes upon Mof depletion in two cell lines, MEFs and podocytes, with and without Adriamycin
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Project description:Transcription profiling to identify the role of MOF in primary MEFs and differentiated podocytes in response to Adriamycin
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Project description:The histone acetyltransferase (HAT) Mof is essential for mouse embryonic stem cells (mESC) pluripotency and early development. Mof is the enzymatic subunit of two different HAT complexes, MSL (Male-Specific Lethal) and NSL (Non-specific lethal). The individual contribution of MSL and NSL complexes to transcription regulation in mESCs is not well understood. Our genome-wide analysis of MSL and NSL localization show that i) MSL and NSL bind to specific and common sets of expressed genes, ii) NSL binds at promoters, iii) while MSL binds in gene bodies. Knockdown of Msl1 leads to a global loss of histone H4K16ac indicating that MSL is the main HAT acetylating H4K16 in mESCs. MSL was enriched at many mESC-specific genes, but also at bivalent domains. Thus, NSL and MSL HAT complexes differentially regulate specific sets of expressed genes in mESCs. Furthermore, MSL is essential for the regulation of key mESC-specific and bivalent developmental genes. Gene expression was analysed through microarrays in mESCs infected with shRNA vectors expressing either a non-target control, shRNA against Nsl1 or Msl1 to knockdown Nsl1 or Msl1.
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Project description:Purpose: Next-generation sequencing (NGS) was used to identify cellular pathways and genes through systems-based analysis. The goals of this study are to identify NGS-derived transcriptome profiling (RNA-seq) in control (untreated) and Injured (PAN and Adriamycin) podocyte. These high throughput data were further validated through qRT–PCR methods to confirm the cellular pathways and genes affected due to the podocyte injury. Methods: Human podocytes were differentiated for 14 days by thermoswitching from 33⁰C to 37⁰C and removal of growth factors, insulin-transferrin-selenium from the medium. These podocytes were incubated 4hour in serum free RPMI medium and injury was induced by using PAN (100μg/ml) and Adriamycin (0.25μg/ml) treatment for 48 hours.Further, podocytes were processed for RNA isolation and submitted to Medical University of South Carolina Sequencing Core facility for RNA-Seq. All the experiments were performed in triplicates. Conclusions: Our study is first to describe the detailed analysis of PAN and Adriamycin induced podocyte transcriptomes using the RNA-seq technology. A comparative analysis of the differential expression profile was obtained between control vs PAN injured podocytes, and control vs Adriamycin injured podocytes. Complex genetic network and genes effected due to the injury will provide a platform to define biological pathways participate during podocytes injury process.
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Project description:Histone acetylation is sensitive to metabolic cues, however interplay between histone acetyl transferases and cellular metabolism remains poorly understood. Here we report the localization of a classical nuclear HAT- MOF and members of Non-Specific Lethal complex in mitochondria. MOF regulates expression of oxidative phosphorylation (OXPHOS) genes, residing in both nuclear and mitochondrial genomes, selectively in aerobically respiring cells. Furthermore, MOF/KANSL1 depletion causes impaired mitochondrial translation and reduced respiration. MOF loss is catastrophic for tissues with high-energy consumption. In mouse hearts, Mof knockout causes hypertrophic cardiomyopathy, compromised ventricular contractility/ stroke volume and ultimately leads to cardiac failure within three weeks of birth. RNA-seq analysis of the cardiomyocytes revealed deregulation of mitochondrial nutrient metabolism and OXPHOS pathways. Consistently, electron microscopy on affected tissues revealed mitochondrial deterioration with high tissue heterogeneity, commonly observed in mitochondrial diseases. Thus, we reveal a novel function of MOF in mitochondrial homeostasis and propose MOF as a sensor connecting epigenetic regulation to metabolism.
2016-10-21 | GSE77784 | GEO
Project description:Reversible acetylation of mitochondrial proteins is a regulatory mechanism central to adaptive metabolic responses. Yet, how such functionally relevant protein acetylation is achieved remains unexplored. Here, we reveal an unprecedented role of the MYST family lysine acetyltransferase MOF in energy metabolism via mitochondrial protein acetylation. Loss of MOF-KANSL complex members led to mitochondrial defects including fragmentation, reduced cristae density and impaired mitochondrial electron transport chain (mtETC) complex IV (CIV) integrity in primary mouse embryonic fibroblasts. We demonstrate COX17, a CIV assembly factor, as a bona fide acetylation target of MOF. Loss of COX17 or expression of its non-acetylatable mutant phenocopied the mitochondrial defects observed upon MOF depletion. The acetylation-mimetic COX17 rescues these defects and maintains CIV activity even in the absence of MOF, suggesting an activatory role of mtETC protein acetylation. Fibroblasts from MOF syndrome patients with intellectual disability also revealed respiratory defects that could be restored by alternative oxidase, acetylation-mimetic COX17 or mitochondrially targeted MOF. Overall, our findings highlight the critical role of MOF-KANSL complex in mitochondrial physiology and provide new insights into MOF syndrome.
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