FYN-TRAF3IP2 activating fusion oncogene in peripheral T-cell lymphoma
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA575793 | ENA |
REPOSITORIES: ENA
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Project description:FYN-TRAF3IP2 expression in hematopoietic progenitors induces T cell transformation in mice and cooperates with loss of the Tet2 tumor suppressor in PTCL development. To investigate the oncogenic activity of FYN-TRAF3IP2, we analyzed the lymphomagenic effects of expressing this gene fusion alone and in cooperation with loss of the Tet2 tumor suppressor gene in vivo. In these experiments, we first infected hematopoietic progenitors from CD4-specific tamoxifen-inducible Cre Tet2 conditional knockout mice (CD4 Cre-ERT2, Tet2fl/fl) with bicistronic retroviruses expressing wild type TRAF3IP2 and GFP, FYN-TRAF3IP2 and GFP, or GFP alone and injected these intravenously into isogenic recipients. Transplanted mice were then treated with vehicle only, to test the oncogenic effects of TRAF3IP2, FYN-TRAF3IP2 or GFP expression; or with tamoxifen, to evaluate the effects of TRAF3IP2, FYN-TRAF3IP2 or GFP expression in concert with genetic loss of Tet2 in CD4 T cells. In this setting, all animals transplanted with GFP-expressing progenitors remained lymphoma free at the end of follow up and one animal transplanted with wild type TRAF3IP2 GFP expressing cells developed a CD8+ T cell lymphoma. In contrast, 4/10 (40%) vehicle treated mice transplanted with FYN-TRAF3IP2-expressing cells and 5/10 (50%) tamoxifen treated mice transplanted with FYN-TRAF3IP2-expressing cells developed clonal CD4-restricted mature T cell lymphomas. To further analyze the lymphomagenic effect of the fusion gene, we performed transcriptomic profiling of FYN-TRAF3IP2-induced mouse CD4+ GFP+ PTCL tumor lymphocytes compared with normal mouse CD4+ T cells by RNAseq.
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Project description:Fyn kinase has been implicated in multiple behavioral responses to ethanol and in the regulation of myelin gene expression. Here we tested whether Fyn kinase modulated basal or ethanol-responsive expression of genes regulated by acute ethanol in brain regions of the mesolimbocortical dopamine pathway. Using expression profiling, we sought to define Fyn-dependent gene networks underlying ethanol behavioral traits; with emphasis on ethanol-induced loss of righting reflex (LORR) due to the reproducible association of Fyn kinase genotype with this behavioral phenotype (Miyakawa et al., 1997, Boehm et al., 2003, Yaka et al., 2003, Boehm et al., 2004b). Our expression profiling and bioinformatics results suggest multiple Fyn-related mechanisms, especially those affecting a network of myelin-related gene expression within the medial PFC, as contributing to the sedative-hypnotic properties of ethanol. Variation in the expression of these Fyn-dependent gene networks may be critical molecular endophenotypes affecting the behavioral level of response to acute ethanol, and subsequently, the long-term risk for alcohol use disorders. Adult male control (B6129SF2/J) and Fyn-kinase null (B6;129S7-Fyntm1Sor/J) mice were treated with saline or ethanol (3.0 g/kg x 4 hours) and brain regions harvested by microdissection for total RNA expression profiling by Affymetrix microarrays. Samples were randomly assigned to batch groups prior to total RNA extraction, cRNA synthesis and hybridization. Each microarray represents a pooling of 3 animals and 3 arrays were analyzed per treatment group for a total of 12 arrays per brain region. Statistical and bioinformatics analysis was used to identify Fyn-dependent effects on basal and ethanol-responsive gene expression, with a particular focus on myelin-related gene expression. This series of samples includes medial prefrontal cortex (PFC).
2014-08-31 | E-GEOD-49028 | biostudies-arrayexpress
Project description:Mucoepidermoid carcinomas (MEC) is the most common salivary gland malignancy. To date, advanced and nonresectable MEC have poor prognosis and no effective treatment. The CRTC1-MAML2 fusion oncogene, which is associated with more than 50% of MEC, consists of the N-terminal CREB-binding domain of the CREB transcriptional co-activator CRTC1 and the C-terminal transcriptional activation domain of the Notch transcriptional co-activator MAML2. CRTC1-MAML2 fusion was found to interact with CREB and constitutively activate their transcriptional targets. To investigate the genes and pathways regulated by CRTC1-MAML2 fusion oncogene, gene expression profiling analysis were performed in human fusion-positive MEC cells before and after knockdown of both CRTC1-MAML2 and MAML2 as well as in human fusion-negative salivary gland cancer cells before and after MAML2 knockdown only. This study revealed specific transcriptional program induced by the CRTC1-MAML2 fusion oncogene, which potentially mediates CRC1-MAML2 functions in MEC initiation and maintenance. The information will be useful for developing new approaches to block CRTC1-MAML2 fusion-expressing MEC. The fusion-positive H3118 MEC cells were used in this study. The fusion knockdown was performed with two biological replicates for each group. Since we are unable to obtain any shRNA that causes specific knockdown of CRTC1-MAML2, we utilized pSuperRetro-based retroviruses that express shRNA targeting the MAML2 TAD as well as GFP for fusion knock down, and the retroviruses express shRNA targeting luciferase gene (shLuc) and GFP for the control. Cells were infected with retroviruses and cultured for 48 hours. FACS sorting was performed to obtain GFP-positive cells and thus enrich shRNA-expressing cells. RNA was subsequently harvested for microarray analysis. The shMAML2 retroviruses caused the knockdown of MAML2 and CRTC1-MAML2 fusion in fusion-positive H3118 cells.
2014-04-21 | E-GEOD-46580 | biostudies-arrayexpress
Project description:Fyn kinase has been implicated in multiple behavioral responses to ethanol and in the regulation of myelin gene expression. Here we tested whether Fyn kinase modulated basal or ethanol-responsive expression of genes regulated by acute ethanol in brain regions of the mesolimbocortical dopamine pathway. Using expression profiling, we sought to define Fyn-dependent gene networks underlying ethanol behavioral traits; with emphasis on ethanol-induced loss of righting reflex (LORR) due to the reproducible association of Fyn kinase genotype with this behavioral phenotype (Miyakawa et al., 1997, Boehm et al., 2003, Yaka et al., 2003, Boehm et al., 2004b). Our expression profiling and bioinformatics results suggest multiple Fyn-related mechanisms, especially those affecting a network of myelin-related gene expression within the medial PFC, as contributing to the sedative-hypnotic properties of ethanol. Variation in the expression of these Fyn-dependent gene networks may be critical molecular endophenotypes affecting the behavioral level of response to acute ethanol, and subsequently, the long-term risk for alcohol use disorders.
2014-08-31 | GSE49028 | GEO
Project description:To further improve our understanding of the genetic landscape and biology of PTCL-NOS, we performed RNA-sequencing of 15 cases. We describe a recurrent FYN-TRAF3IP2 fusion transcript in PTCL-NOS and PTCL-TFH and a KHDRBS1-LCK fusion transcript in PTCL-NOS.
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