ROR1 Can Interact With TCL1 And Enhance Leukemogenesis in Eµ-TCL1 Transgenic Mice
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE51420 | GEO | 2014/01/02
SECONDARY ACCESSION(S): PRJNA223158
REPOSITORIES: GEO
Similar Datasets
Project description:Transcriptome analysis of RNA samples from leukemia cells of ROR1xTCL1 and TCL1 transgenic mice Animals engrafted with ROR1xTCL1 leukemia-cells developed more aggressive disease than mice engrafted with TCL1 leukemia cells. Transcriptome analysis of RNA samples from leukemia ROR1xTCL1 transgenic mice revealed shared common gene expression signatures that were distinct from those of TCL1 leukemia-cells. We performed microarray transcriptome analyses on isolated leukemia cells that developed in ROR1xTCL1 Tg mice (n=4) or TCL1 Tg mice (n=4) using the Affymetrix Mouse Exon 1.0 ST platform. Array data was processed by Affymetrix Exon Array Computational Tool. No techinical replicates were performed.
2014-01-02 | E-GEOD-51420 | biostudies-arrayexpress
Project description:Receptor tyrosine kinase-like orphan receptor 1 (ROR1) is an oncoembryonic antigen found on chronic lymphocytic leukemia (CLL) B cells, but not on normal adult tissues. We generated transgenic (Tg) mice with human ROR1 regulated by the murine Ig promoter/enhancer. In contrast to nontransgenic littermates, such animals had B-cell-restricted expression of ROR1 and could develop clonal expansions of ROR1(bright)CD5(+)B220(low) B cells resembling human CLL at ≥ 15 mo of age. Because immune-precipitation and mass spectrometry studies revealed that ROR1 could complex with T-cell leukemia 1 (TCL1) in CLL, we crossed these animals with Eµ-TCL1-Tg (TCL1) mice. Progeny with both transgenes (ROR1 × TCL1) developed CD5(+)B220(low) B-cell lymphocytosis and leukemia at a significantly younger median age than did littermates with either transgene alone. ROR1 × TCL1 leukemia B cells had higher levels of phospho-AKT than TCL1 leukemia cells and expressed high levels of human ROR1, which we also found complexed with TCL1. Transcriptome analyses revealed that ROR1 × TCL1 leukemia cells had higher expression of subnetworks implicated in embryonic and tumor-cell proliferation, but lower expression of subnetworks involved in cell-cell adhesion or cell death than did TCL1 leukemia cells. ROR1 × TCL1 leukemia cells also had higher proportions of Ki-67-positive cells, lower proportions of cells undergoing spontaneous apoptosis, and produced more aggressive disease upon adoptive transfer than TCL1 leukemia cells. However, treatment with an anti-ROR1 mAb resulted in ROR1 down-modulation, reduced phospho-AKT, and impaired engraftment of ROR1 × TCL1 leukemia cells. Our data demonstrate that ROR1 accelerates development/progression of leukemia and may be targeted for therapy of patients with CLL.
| S-EPMC3896194 | biostudies-literature
Project description:TCL1 is an an oncogene and transgenic (Tg) mice expressing TCL1 specifically in B-cells are well-characterized models for chronic lymphocytic leukemia. On the contrary, PTPROt is a phosphatase with tumor suppressor characteristics in many cancers including leukemia. Our hypothesis was that transgenic expression of PTPROt in the B-cells of TCL1 Tg mice will alleviate disease phenotype and allow the study of the in vivo mechanism of action of PTPROt. To test this we have generated Tg mice with B-cell specific expression of PTPROt and crossed these mice with the TCL1 Tg mice.
2016-01-04 | GSE60582 | GEO
Project description:Aberrant CXCR4 activity has been implicated in lymphoma pathogenesis, disease progression and resistance to therapies. Using a mouse model with a gain-of-function CXCR4 mutation (CXCR4C1013G) that hyperactivates CXCR4 signaling, we identified CXCR4 as a crucial activator of multiple key oncogenic pathways. CXCR4 hyperactivation furthermore resulted in an expansion of transitional B1 lymphocytes, which represent the precursors of chronic lymphocytic leukemia (CLL). Indeed, CXCR4 hyperactivation led to a significant acceleration of disease onset and a more aggressive phenotype in the murine Eµ-TCL1 CLL model. Hyperactivated CXCR4 signaling cooperated with TCL1 to cause a distinct oncogenic transcriptional program in B cells, characterized by PLK1/FOXM1-associated pathways. In accordance, Eµ-TCL1;CXCR4C1013G B cells enriched a transcriptional signature from patients with Richter’s syndrome, an aggressive transformation of CLL. In summary, we here identify CXCR4 hyperactivation as a co-driver of an aggressive lymphoma phenotype. Here we make available the transcriptomic data of CD19+ B cells from bone marrow and spleen of 6-week-old WT, CXCR4C1013G, Eµ-TCL1 and Eµ-TCL1;CXCR4C1013G mice.
2021-06-27 | GSE178959 | GEO
Project description:The function of ID4 in CLL development was studied in vivo using TCL1 transgenic mouse model that develop leukemia similar to human CLL. TCL1 mice with ID4 single knockout gene have accelerated CLL progression. Results from the animal study suggest ID4 as a tumor suppressor gene that might regulate cell proliferation and apoptosis in B lymphocytes. Gene expression in CD19-positive splenic B cells collected from 1-month old ID4+/-TCL1-tg and ID4+/+TCL1-tg mice was compared by microarray, the goal is to find ID4-regulated genes involved in CLL development.
2010-11-04 | E-GEOD-25100 | biostudies-arrayexpress
Project description:Tcl1 tg mice develop a chronic lymphocytic leukemia (CLL) -like disease. To investigate the contribution of the adhesion molecule CD44 to CLL pathophysiology, we developed a CD19Cre CD44flox/flox Tcl1 tg mouse with a B cell specific CD44 deficiency (CD44ΔB Tcl1 tg). We used the Clariom S mouse microarray from Affymetrix to investigate transcriptional differeneces between Tcl1 tg and CD44ΔB Tcl1 tg mice
2018-01-13 | GSE109121 | GEO
Project description:The function of ID4 in CLL development was studied in vivo using TCL1 transgenic mouse model that develop leukemia similar to human CLL. TCL1 mice with ID4 single knockout gene have accelerated CLL progression. Results from the animal study suggest ID4 as a tumor suppressor gene that might regulate cell proliferation and apoptosis in B lymphocytes.
2010-11-04 | GSE25100 | GEO
Project description:Purpose: Karyotype screening in patients with chronic lymphocytic leukemia (CLL) has identified a rare chromosome translocation, t(X;14)(q28;q32), placing the mature T cell proliferation 1 (MTCP1) gene under transcriptional control of the immunoglobulin (IGH) locus. To establish the role of MTCP1 as a driving gene in CLL, we generated a novel mouse model (Eµ-MTCP1) which recapitulates overexpression of MTCP1 in murine immature and mature B cells. Eµ-MTCP1 mice developed a CLL-like disease found in the blood, spleen, lymph nodes, and other tissues. As the MTCP1 protein shares significant homology with the TCL1A oncoprotein, and the Eµ-TCL1 mouse model is widely used as an preclinical tool in CLL due to the development of a CLL-like disease in the blood, spleen, and other tissues, we aimed to evaluate the transcriptome between the CLL-like disease of Eµ-MTCP1 and Eµ-TCL1 mice. Methods: Transgenic Eµ-MTCP1 mice were generated on a C57BL/6NTac background at The Ohio State University Comprehensive Cancer Center’s Transgenic Mouse Facility via pronuclear injection of linear constructs derived from a plasmid vector encoding murine VH promoter-IgH-Eμ enhancer elements followed by human cDNA encoding the p13 kDa MTCP1 protein. Eµ-MTCP1 and Eµ-TCL1 mice were aged and monitored for development of CLL-like disease my monthly flow cytometry assessment of the blood. Upon reaching significant accumulation in the blood (>60%), mice were randomly chosen for euthanization and cell populations were isolated from the spleen according to previously described protocols. From this suspension, B cells were isolated using EasySepTM mouse pan B cell isolation kit (STEMCELL Technologies; Cat #19844). Cell pellets were captured and washed in PBS on ice prior to resuspension in TRIzol reagent and stored at -80°. Total RNA was isolated from TRIzol suspensions using a chloroform/ethanol extraction method and quantified via Qubit RNA HS Assay kit (Invitrogen). The Clontech SMARTer v4 kit (Takara Bio USA, Inc.) was used for global preamplification. Illumina sequencing libraries were derived from the resultant cDNA using the Illumina Nextera XT DNA Library Prep Kit following manufacturer’s instructions. RNA-sequencing libraries were prepared with the Illumina Tru-Seq stranded kit and sequenced on a Hiseq 4000 targeting 40x10E6 fragments per sample. Transcript-level abundances were estimated using Salmon with the genocode mouse release 23, imported using tximport, with normalization and differential expression computed with DESeq2. Data processing was performed according to the CLEAR workflow, which identifies reliably quantifiable transcripts in low-input RNA-seq for differentially expressed gene (DEG) transcripts using gene coverage profiles. MiXCR (v3.0.5) was used with default parameters except the rnaseq alignment was replaced with kaligner2 to identify preprocessed reads containing CDR3 regions from B-cell heavy, kappa, and lambda chains, generating a list of unique CDR3 sequences associated with their relative abundances and specific V(D)J gene usage. MiXCR then generates a list of unique CDR3 sequences associated with their relative abundances and specific V(D)J gene usage. To verify expression of the human MTCP1 and TCL1 transgene (hMTCP1 & hTCL1) in mice, transcript level abundances were estimated using Salmon with a modified gencode mouse reference that contained sequences from human MTCP1 and human TCL1 genes extracted from the grch38 human reference. Results & Conclusion: Across splenic B cells isolated from both Eµ-MTCP1 and Eµ-TCL1 mice there was prominent usage of distinct heavy chain BCR gene loci in each mouse analyzed. In contrast, wildtype mice exhibited high degree of variability in heavy chain V gene usage without dominant emergence of any gene, indicative of a heterogeneous mixture of splenic B cells. Similar patterns suggesting clonal leukemic populations were observed by kappa and lamba light chain usage. The complexity and aggressive nature of human CLL is often stratified by IGHV mutation status of the malignant B cell population. The most abundant tumorigenic clones isolated from spleens of Eµ-MTCP1 and Eµ-TCL1 mice both exhibited low mutational burden in IGHV, well below the threshold for classification as “mutated." The low mutational burden in this region is consistent with the aggressive, IGHV-unmutated, subtype of human CLL. Moreover, we aimed to determine the overall transcriptional profile of these monoclonal tumor cells and to establish relation to that of the CLL-like cells in Eµ-TCL1 mice. Principal component analysis of the global transcription profile revealed distinct clustering of Eµ-MTCP1 and Eµ-TCL1 tumor cell transcriptomes along PC2, with significant segregation from wildtype littermates across PC1. Analysis of the overall gene expression pattern between Eµ-MTCP1 and Eµ-TCL1 transgenic strains revealed a significant overlap in genes most variable from B cells of wildtype animals. A considerable degree of overlap in gene expression was noted when directly comparing Eµ-MTCP1 and Eµ-TCL1 expression profiles, with a total of only 92 of 27,054 analyzed genes having significant variation (p<0.001) from one transgenic model to the other.
2021-08-24 | GSE176094 | GEO
Project description:B cell chronic lymphocytic leukemia (CLL) is often preceded by a benign monoclonal or oligoclonal CD5+ B cell lymphocytosis. We have generated transgenic mice expressing a catalytically inactive, dominant-negative recombination activating gene 1 (dnRAG1 mice) in the periphery. These animals develop an early-onset indolent CD5+ B cell lymphocytosis, caused in part by a defect in secondary V(D)J rearrangements initiated to alter autoreactive B cell receptor specificity. Hypothesizing that the CD5+ B cells accumulating in dnRAG1 mice represent a CLL precursor, we crossed dnRAG1 mice with CLL-prone Eµ-TCL1 mice to determine whether dnRAG1 expression in Eµ-TCL1 mice accelerates the onset of CLL-like disease. We find that CD5+ B cell expansion and CLL progression occurs more rapidly and uniformly in double-transgenic mice (DTG mice) compared to Eµ-TCL1 mice, but with similar phenotypic and leukemogenic features. To gain insight into genes or pathways responsible for CD5+ B cell accumulation in the transgenic mice, we performed comparative gene expression profiling studies using normal and CD5+ B cells isolated from wild-type and transgenic mice at either 12 weeks of age (pre-leukemia) or at CLL onset in DTG mice (using age-matched wild-type and single-transgenic mice as controls). These analyses confirm the upregulation of tolerogenic genes in CD5+ B cells and reveal a possible role for prolactin signaling in the regulation of receptor editing. This study suggests that a failure to remodel B cell antigen receptor genes in response to autoreactivity may promote the benign accumulation of CD5+ B cells, which may then be subjected to secondary genetic lesions that promote CLL progression. dnRAG1 mice were bred to Eµ-TCL1 mice to obtain cohorts of wild-type (WT), single-transgenic (dnRAG1 and Eµ-TCL1), and DTG mice. Splenic CD19+B220hiCD5- B cells from WT mice or CD19+CD5+ B cells from transgenic mice were purified using fluorescence activated cell sorting (FACS). Biotin end-labeled cDNA prepared from the sorted cells was hybridized to Mouse Gene 1.0 ST Arrays. These experiments were performed two independent times: once with a cohort of 12-week-old mice, and once with older mice (>34 weeks old) consisting of two ill DTG mice and their age-matched counterparts. At least two biological replicates were used where possible.
2013-06-04 | E-GEOD-44940 | biostudies-arrayexpress
Project description:Tcl1 is one of embryonic stem cell specific transcripts identified by digital differential display analysis. Tcl1 is highly expressed during early embryogenesis and to some extent in embryonic stem cells. Its expression in adult tissues is restricted to testis and ovary, and is found to decline if Oct-3/4 expression is suppressed in embryonic stem cells. It is reported that the female knockout mice exhibit reduced fertility. It was first identified in human T-cell tumors and the tumorigenic property was proved by a series of transgenic studies. We have used DNA microarray to identify potential Tcl1 targets in embryonic stem cells and the influence of Tcl1 on stemness. Experiment Overall Design: We analyzed two arrays, each comparing expression profiles of a Tcl1 gene disruptant and a Tcl1 stable transformant. We used different clones with their dyes swapped.(biological replication)
2008-06-13 | E-GEOD-4801 | biostudies-arrayexpress