Unknown,Transcriptomics,Genomics,Proteomics

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JMJD3 is needed to regulate TGF beta responsive genes.

ABSTRACT: Neural development requires crosstalk between signaling pathways and chromatin. In this study, we demonstrate that neurogenesis is promoted by an interplay between the TGFM-NM-2 pathway and the H3K27me3 histone demethylase (HDM) JMJD3. Genome-wide analysis showed that JMJD3 is targeted to gene promoters by Smad3 in neural stem cells (NSCs) and is essential to activate TGFM-NM-2-responsive genes. In vivo experiments in chick spinal cord revealed that the generation of neurons promoted by Smad3 is dependent on JMJD3 HDM activity. Overall, these findings indicate that JMJD3 function is required for the TGFM-NM-2 developmental program to proceed Mouse neural stem cells (NSC) control and JMJD3 knock down (shctrl and shJMJD3) were treated with the vehicle (-TGFb) or TGFbeta 5ng/ml (+TGFb) for 2.5h. Three replicates were performed for each point. And all of them were use it to posterior analysis.

ORGANISM(S): Mus musculus

SUBMITTER: Conchi EstarM-CM-!s

PROVIDER: E-GEOD-35361 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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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 TGFM-NM-2 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 TGFM-NM-2 signaling in advanced breast cancer. We compared two independent shRNAs: shWWOX-A and shWWOX-B with 3 biological replicates each one, targeting different regions of the WWOX transcript as a means of ruling out any potential off-target effects.

Project description:Background: In humans, cleft palate (CP) accounts for one of the largest number of birth defects with a complex genetic and environmental etiology. TGFM-NM-23 has been established as an important regulator of palatal fusion in mice and it has been shown that TGFM-NM-23-null mice exhibit CP without any other major deformities. However, the genes that regulate cellular decisions and molecular mechanisms maintained by the TGFM-NM-23 pathway throughout palatogenesis are predominantly unexplored. Our objective in this study was to analyze global transcriptome changes within the palate during different gestational ages within TGFM-NM-23 knockout mice to identify TGFM-NM-23-associated genes previously unknown to be associated with the development of cleft palate. We used deep sequencing technology, RNA-Seq, to analyze the transcriptome of TGFM-NM-23 knockout mice at crucial stages of palatogenesis, including palatal growth (E14.5), adhesion (E15.5), and fusion (E16.5). Results: The overall transcriptome analysis of TGFM-NM-23 wildtype mice (C57BL/6) reveals that almost 6000 genes were upregulated during the transition from E14.5 to E15.5 and more than 2000 were downregulated from E15.5 to E16.5. Using bioinformatics tools and databases, we identified the most comprehensive list of CP genes (n = 322) in which mutations cause CP either in humans or mice, and analyzed their expression patterns. The expression motifs of CP genes between TGFM-NM-23+/M-bM-^HM-^R and TGFM-NM-23M-bM-^HM-^R/M-bM-^HM-^R were not significantly different from each other, and the expression of the majority of CP genes remained unchanged from E14.5 to E16.5. Using these patterns, we identified 8 unique genes within TGFM-NM-23M-bM-^HM-^R/M-bM-^HM-^R mice (Chrng Foxc2, H19, Kcnj13, Lhx8, Meox2, Shh, and Six3), which may function as the primary contributors to the development of cleft palate in TGFM-NM-23M-bM-^HM-^R/M-bM-^HM-^R mice. When the significantly altered CP genes were overlaid with TGFM-NM-2 signaling, all of these genes followed the Smad-dependent pathway. Conclusions: Our study represents the first analysis of the palatal transcriptome of the mouse, as well as TGFM-NM-23 knockout mice, using deep sequencing methods. In this study, we characterized the critical regulation of palatal transcripts that may play key regulatory roles through crucial stages of palatal development. We identified potential causative CP genes in a TGFM-NM-23 knockout model, which may lead to a better understanding of the genetic mechanisms of palatogenesis and provide novel potential targets for gene therapy approaches to treat cleft palate. Palatal mRNA profiles of wild type (WT), TGFM-NM-23+/-, and TGFM-NM-23-/- mice at E14.5, E15.5, and E16.5 were generated by deep sequencing, in triplicate, using Illumina HiSeq2000

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JMJD3 is needed to regulate TGF beta responsive genes.

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