DYRK1A Inhibition via Harmine or via Conditional Knockout
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ABSTRACT:
PROVIDER: PRJNA1171837 | ENA |
REPOSITORIES: ENA
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Project description:Chemical inhibition of DYRK1A (e.g. using harmine) inhibits Th17 and promotes Treg differentiation. To better understand the mechanisms by which DYRK1A regulates Th17 differentiation, we are comparing expression profiles of naïve CD4+ T cells during the course of Th17 differentiation in the presence or absence of harmine.
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Project description:To identify the activated tyrosine kinase signaling pathways in HNSCC, we carried out phosphotyrosine profiling using a panel of HNSCC cell lines compared to a normal oral keratinocyte. A total of 61 unique phosphosites were identified across these cell lines. Dual-specificity tyrosine-(Y)-phosphorylation regulated kinase 1A (DYRK1A) was one of the kinases hyperphosphorylated at Y321 in all the HNSCC cell lines compared to the normal oral cell line OKF6/TERT1. Inhibition of DYRK1A using its specific siRNA and inhibitor resulted in a decrease in the invasion and colony formation ability of the HNSCC cell lines. Further, the treatment of mice bearing HNSCC xenograft tumors with DYRK1A inhibitor (harmine) showed regression of tumor growth. Our results demonstrate that DYRK1A could be a novel therapeutic target in HNSCC.
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Project description:Using an unbiased chemical biology approach, we discover harmine as a novel regulator of Treg/Th17 differentiation. Harmine enhances Treg differentiation (working in conjunction with low levels of exogenous TGFb) and inhibits Th17 differentiation. Analysis of global gene expression of Tregs generated using low TGFb + harmine reveals significant similarity to Tregs generated using high TGFb only and suggests relevance of harmine-engaged mechanisms to IBD. Naïve CD4+CD62L+ T cells were purified from Foxp3GFP mice either by MACS or FACS, then cultured in either low TGFb + harmine or high TGFb conditions. GFP+ Tregs were sorted by FACS at day 4.
2015-04-29 | E-GEOD-64247 | biostudies-arrayexpress
Project description:Here we performed a detailed investigation to delineate the role of DYRK1A in glioblastoma, using both pharmacological and genetic tools combined with global phosphoproteomics. Our data show that DYRK1A inhibitors affect a much broader proportion of the phosphoproteome than DYRK1A knockdown. By overlaying these datasets we identify a pool of 61 putative novel DYRK1A targets, and validate CDC23 Ser588 as a bona-fide DYRK1A substrate. CDC23 is a ubiquitin ligase that degrades mitotic proteins, and DYRK1A inhibiton thereby leads to the accumulation of cyclin B and activation of CDK1.
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Project description:DYRK1A is a protein kinase with several roles in brain development. This kinase is involved in two intellectual disability syndromes: Down syndrome and DYRK1A haploinsufficiency syndrome. The Dyrk1a+/- mouse is a model for DYRK1A haploinsufficiency syndrome. We used microarray to evaluate the impact of DYRK1A haploinsufficiency in the development of the cerebral cortex.
2019-03-06 | GSE127707 | GEO
Project description:Transcription profiling of transgenic down syndrome mouse model to show the role of DYRK1A gene. The molecular mechanisms that lead to the cognitive defects characteristic of Down syndrome (DS), the most frequent cause of mental retardation, have remained elusive. Here we use a transgenic DS mouse model to show that DYRK1A gene dosage imbalance deregulates chromosomal clusters of genes located near neuron-restrictive silencer factor (REST/NRSF) binding sites. We found that DYRK1A binds the SWI/SNF-complex known to interact with REST/NRSF. Mutation of a REST/NRSF binding site in the promoter of the REST/NRSF target gene L1cam modifies the transcriptional effect of Dyrk1Adosage imbalance on L1cam. DyrkA dosage imbalance perturbs Rest/Nrsf levels with decreased Rest/Nrsf expression in embryonic neurons and increased expression in adult neurons. We identified a coordinated deregulation of multiple genes that are responsible for the cellular phenotypic traits present in DS such as dendritic growth impairment and microcephaly during prenatal cortex development. Dyrk1a overexpression in primary mouse cortical neurons reduced the neuritic complexity. In the postnatal hippocampus, DYRK1A overexpression suppresses a form of synaptic plasticity that may be sufficient to cause DS cognitive defects. We propose that DYRK1A overexpression-related neuronal gene deregulation generates the brain phenotypic changes that characterize DS, with an accessory role for the gene dosage imbalance of other chromosome 21 genes. Transgenic embrionic brain regions versus wild type mice were analysed. The log2 values represent Cy5/Cy3 ratio (transgenic Cy5/wild type Cy3). Each array was scanned under a green laser (543 nm for Cy3 labeling) or a red laser (633 nm for Cy5 labeling) using a ScanArray Lite scanning confocal fuorescent scanner with 10 u resolution (laser power: 85% for Cy5 and 90% for Cy3, gain: 75% for Cy5 and 70% for Cy3). Scanned output files were analyzed using the GenePix Pro 3.0 software. Each spot was defined by automatic positioning of a grid of circles over the image. The average and median pixel intensity ratios calculated from both channels and the local background of each spot were determined. Local background corrected intensity ratios was determined for each spot. The background-corrected expression data were filtered for flagged spots and weak signal. Normalization was performed by the global Lowess method. Studentâs t-test was applied to determine the p value.
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Project description:To explore effect of DYRK1A silencing on H3K4me3 and H3K27ac modification of primary cultured cardiomyocytes isolated from 1-day-old SD rats
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Project description:Transcription profiling of transgenic down syndrome mouse model to show the role of DYRK1A gene. The molecular mechanisms that lead to the cognitive defects characteristic of Down syndrome (DS), the most frequent cause of mental retardation, have remained elusive. Here we use a transgenic DS mouse model to show that DYRK1A gene dosage imbalance deregulates chromosomal clusters of genes located near neuron-restrictive silencer factor (REST/NRSF) binding sites. We found that DYRK1A binds the SWI/SNF-complex known to interact with REST/NRSF. Mutation of a REST/NRSF binding site in the promoter of the REST/NRSF target gene L1cam modifies the transcriptional effect of Dyrk1Adosage imbalance on L1cam. DyrkA dosage imbalance perturbs Rest/Nrsf levels with decreased Rest/Nrsf expression in embryonic neurons and increased expression in adult neurons. We identified a coordinated deregulation of multiple genes that are responsible for the cellular phenotypic traits present in DS such as dendritic growth impairment and microcephaly during prenatal cortex development. Dyrk1a overexpression in primary mouse cortical neurons reduced the neuritic complexity. In the postnatal hippocampus, DYRK1A overexpression suppresses a form of synaptic plasticity that may be sufficient to cause DS cognitive defects. We propose that DYRK1A overexpression-related neuronal gene deregulation generates the brain phenotypic changes that characterize DS, with an accessory role for the gene dosage imbalance of other chromosome 21 genes.
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