WWOX P47T loss-of-function mutation induces epilepsy, progressive neuroinflammation, and cerebellar degeneration
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PROVIDER: PRJNA890254 | ENA |
REPOSITORIES: ENA
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Project description:WWOX gene loss-of-function (LoF) has been associated with neuropathologies resulting in developmental, epileptic, and ataxic phenotypes of varying severity based on the level of WWOX dysfunction. WWOX gene biallelic germline variant p.Pro47Thr (P47T) has been causally associated with a new form of autosomal recessive cerebellar ataxia with epilepsy and intellectual disability (SCAR12). This mutation affects the WW1 protein binding domain of WWOX, impairing its ability to interact with canonical proline-proline-X-tyrosine motifs in partner proteins. We generated a mutant knock-in mouse model of Wwox P47T that phenocopies SCAR12. WwoxP47T/P47T mice displayed epilepsy, profound social behavior and cognition deficits, and poor motor coordination. These deficits progressed with age, and mice became practically immobile, suggesting severe cerebellar dysfunction. WwoxP47T/P47T mice exhibited signs of progressive neuroinflammation with elevated astro-microgliosis that increased with age. The cerebellar cortex displayed significantly reduced molecular and granular layer thickness and a strikingly reduced number of Purkinje cells with degenerated dendrites. Transcriptome profiling from various brain regions from these Wwox LoF mice highlighted widespread changes in neuronal and glial pathways, enrichment of bioprocesses related to neuroinflammation and severe cerebellar dysfunction, activation of pathways compatible with compensatory neurogenesis along with major suppression of gene networks associated with neuronal cell differentiation and brain development. Our results show significant pathobiological effects and potential mechanisms through which Wwox LoF leads to cerebellar neurodegeneration, neuroinflammation, and ataxia.
2023-02-28 | GSE215425 | GEO
Project description:Loss-of-function mutations in cystatin B (CSTB) cause progressive myoclonus epilepsy of Unverricht-Lundborg type (EPM1). Cstb-deficiency in mice leads to early alterations in GABAergic signaling, and causes neuroinflammation followed by progressive neurodegeneration, manifesting as progressive myoclonus and ataxia. The proteome of cerebellar synaptosomes of presymptomatic Cstb-/- mice were characterized by LC-ESI-MS/MS to gain insight into disease formation and progression.
2020-10-20 | PXD019370 | Pride
Project description:In this study we have compared the proteomes from cerebellar synaptosome of early symptomatic Cstb-/- and wild type mice to gain insight into disease onset and progression of cystatin B deficiency. Biallelic loss-of-function mutations in the CSTB gene cause progressive myoclonus epilepsy of Unverricht-Lundborg type (EPM1). In the mouse model of EPM1, CSTB deficiency manifests from one month of age as progressive neurodegeneration, myoclonus and ataxia, which is preceded by neuroinflammation, alterations in GABAergic signaling, and a widespread rearrangement of the mitochondrial proteome in synapses.
2023-07-20 | PXD040382 | Pride
Project description:WWOX expression is lost during tumor progression in many human malignancies including breast cancer. To understand the effects of loss of WWOX expression we analyzed the consequences of its silencing in normal human breast cells (MCF10F). WWOX silencing led to the formation of larger cell colonies, increased cell motility and decreased cell attachment. WWOX silenced cells demonstrated deregulated expression on genes involved in cell cycle, DNA damage response and cell motility. We detected an enrichment of targets activated by the SMAD3 transcription factor. Most notably expression of ANGPTL4, FST, PTHLH and SERPINE1 were all significantly increased upon WWOX silencing. Upregulation of these genes can be reversed by re-expressing WWOX in the previously silenced cells thus suggesting an inverse correlation between WWOX protein expression and SMAD3 transcriptional activity. Importantly, we demonstrate that WWOX physically interacts with SMAD3 protein via WW domain 1, that WWOX expression dramatically decreases SMAD3 occupancy at the ANGPTL4 and SERPINE1 promoters and significantly quenches activation of a TGFβ responsive reporter (3TP-LUX). Furthermore, WWOX expression leads to intracellular redistribution of SMAD3 protein levels redirecting protein availability from the nuclear to the cytoplasmic compartment. Interestingly, meta-analysis of gene expression breast cancer datasets indicate that WWOX and ANGPTL4 expression, encoding a secreted protein of key relevance in breast cancer lung metastatic cells, are inversely correlated and the WWOXlo/ANGPTL4hi cluster of tumors are enriched in triple-negative and basal-like sub-types. In summary, we demonstrate that WWOX modulates SMAD3 signaling in breast cells via direct WW-domain binding and potential cytoplasmic sequestration of SMAD3 protein. Since loss of WWOX expression increases with breast cancer progression and it behaves as an inhibitor of SMAD3 transcriptional activity these observations may help explain, at least in part, the paradoxical pro-tumorigenic effects of TGFβ signaling in advanced breast cancer.
2013-11-28 | GSE47371 | GEO
Project description:The WWOX gene is known for its tumor suppressor character and seems to be one of the main cellular regulators of cell cycle and apoptosis. The aim of the study was to identify cellular pathways and biological processes influenced by WWOX in glioblastoma cells. Our experiment showed that in this type of cancer WWOX, beside cell cycle and apoptosis control, may be involved in metabolism, cytoskeleton structure and differentiation.
2013-10-22 | GSE51481 | GEO
Project description:Metabolome studies to aid in the diagnosis and molecular elucidation of a child presenting chronic progressive cerebellar ataxia and an undiagnosed condition.
2020-10-20 | ST001518 | MetabolomicsWorkbench
Project description:The WWOX gene is known for its tumor suppressor character and seems to be one of the main cellular regulators of cell cycle and apoptosis. The aim of the study was to identify cellular pathways and biological processes influenced by WWOX in glioblastoma cells. Our experiment showed that in this type of cancer WWOX, beside cell cycle and apoptosis control, may be involved in metabolism, cytoskeleton structure and differentiation. T98G glioblastoma cells were stably transfected with WWOX cDNA. T98G cells transfected with an empty vector served as a control. Total mRNA was isolated to look for gene-expression differences induced by the WWOX overexpression.
2013-10-22 | E-GEOD-51481 | biostudies-arrayexpress
Project description:The WWOX gene spans chromosomal fragile site FRA16D, a region of DNA instability in cancer. While WWOX has some tumor suppressor characteristics, its normal role and functional contribution to cancer are unclear. Drosophila homozygous Wwox mutants are viable with no discernable phenotype. Drosophila Wwox interactors, identified by proteomics and micro-array analyses, mainly have roles in aerobic metabolism. Functional relationships between Wwox and either isocitrate dehydrogenase (IDH) or superoxide dismutase 1 (Sod1) were confirmed by phenotype modification, including Sod1 ‘crinkled-wing’, indicative of oxidative stress response. Endogenous reactive oxygen species levels reflect Wwox levels in Drosophila. WWOX mRNA levels in Drosophila and human cells correlate with IDH and Sod1 levels. Wwox therefore contributes to pathways involving glucose metabolism and oxidative stress response.
2010-12-07 | GSE22689 | GEO
Project description:The WWOX gene has been implicated in human cancers, including breast cancer.The development and tumorigenesis between human and mouse mammary glands (MGs) share similar molecular details and signal transduction pathways. We established mouse line that specifically knockout the expression of WWOX gene in the MG epithelial cells (MECs) by crossing BK5-cre mice with our WWOX flox stain. In order to study the gene expression profile in the subpopulation MECs, we isolated the organoids from the 4th MGs of both BK5-cre +; WWOX flox/flox (KO) mice and their WT counterparts (BK5-cre -; WWOX flox/flox), 3 mice each genotype. The total RNA from the mouse MG organoids was extracted and purified by TRIzol/RNeasy Kit and their integrity was checked on Agilent RNA 6000 Nanochip. The goal is to identify the significant perturbation in tumorigenic pathways in these cells induced by WWOX ablation.
2012-04-15 | GSE36665 | GEO
Project description:The WWOX gene has been implicated in human cancers, including breast cancer.The development and tumorigenesis between human and mouse mammary glands (MGs) share similar molecular details and signal transduction pathways. We established mouse line that specifically knockout the expression of WWOX gene in the MG epithelial cells (MECs) by crossing BK5-cre mice with our WWOX flox stain. In order to study the gene expression profile in the subpopulation MECs, we isolated the organoids from the 4th MGs of both BK5-cre +; WWOX flox/flox (KO) mice and their WT counterparts (BK5-cre -; WWOX flox/flox), 3 mice each genotype. The total RNA from the mouse MG organoids was extracted and purified by TRIzol/RNeasy Kit and their integrity was checked on Agilent RNA 6000 Nanochip. The goal is to identify the significant perturbation in tumorigenic pathways in these cells induced by WWOX ablation. Mammary gland epithelial organoids samples and gene expression profiles were deribed from three WWOX-KO mice (BK5-cre +; WWOX flox/flox) and from three WWOX-WT mice (BK5-cre -; WWOX flox/flox)
2012-04-14 | E-GEOD-36665 | biostudies-arrayexpress