Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Expression data from mouse bone marrow cells expressing renin driven expression of green fluorescent protein.

ABSTRACT: Local renin antiotensin systems have been identified for many extra-renal sites. Bone marrow has been proposed as one such site, although the nature of the renin-expressing cell type(s) has not been established. Affymetrix microarrays were used to characterize the expression profile of renin-expressing GFP positive cells. Green fluorescent protein positive cells were sorted from whole bone marrow collected from adult transgenic mice. Bone marrow from several mice was collected and pooled on the day of a FACS sort. A portion of this was reserved for RNA extraction while the remainder was sorted. RNA was prepared with Trizol. Bone marrow collection and sorting was performed 3 times so that microarrays could be run in triplicate.

ORGANISM(S): Mus musculus

SUBMITTER: Ping Liang

PROVIDER: E-GEOD-53916 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Identification of renin progenitors in the mouse bone marrow that give rise to B-cell leukaemia.

Belyea Brian C BC Xu Fang F Pentz Ellen S ES Medrano Silvia S Li Minghong M Hu Yan Y Turner Stephen S Legallo Robin R Jones Craig A CA Tario Joseph D JD Liang Ping P Gross Kenneth W KW Sequeira-Lopez Maria Luisa S ML Gomez R Ariel RA

Nature communications 20140101

The cell of origin and triggering events for leukaemia are mostly unknown. Here we show that the bone marrow contains a progenitor that expresses renin throughout development and possesses a B-lymphocyte pedigree. This cell requires RBP-J to differentiate. Deletion of RBP-J in these renin-expressing progenitors enriches the precursor B-cell gene programme and constrains lymphocyte differentiation, facilitated by H3K4me3 activating marks in genes that control the pre-B stage. Mutant cells undergo ...[more]

PMID: 24549417

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Project description:BACKGROUND: Hox genes are implicated in hematopoietic stem cell (HSC) regulation as well as in leukemia development through translocation with the nucleoporin gene NUP98. Interestingly, an engineered NUP98-HOXA10 (NA10) fusion can induce a several hundred-fold expansion of HSCs in vitro and NA10 and the AML-associated fusion gene NUP98-HOXD13 (ND13) have a virtually indistinguishable ability to transform myeloid progenitor cells in vitro and to induce leukemia in collaboration with MEIS1 in vivo. METHODOLOGY/PRINCIPAL FINDINGS: These findings provided a potentially powerful approach to identify key pathways mediating Hox-induced expansion and transformation of HSCs by identifying gene expression changes commonly induced by ND13 and NA10 but not by a NUP98-Hox fusion with a non-DNA binding homedomain mutation (N51S). The gene expression repertoire of purified murine bone marrow Sca-1+Lin- cells transduced with retroviral vectors encoding for these genes was established using the Affymetrix GeneChip MOE430A. Approximately seventy genes were differentially expressed in ND13 and NA10 cells that were significantly changed by both compared to the ND13(N51S) mutant. Intriguingly, several of these potential Hox target genes have been implicated in HSC expansion and self-renewal, including the tyrosine kinase receptor Flt3, the prion protein, Prnp, hepatic leukemia factor, Hlf and Jagged-2, Jag2. CONCLUSIONS: In conclusion this study has identified several novel Hox downstream target genes and provides important new leads to key regulators of the expansion and transformation of hematopoietic stem cells by Hox. Experiment Overall Design: Adult murine bone marrow cells transduced with vectors carrying ND13, NA10, ND13(N51S) or an empty GFP control vector (MIG) were isolated on the basis of GFP expression by FACS 24 hours post-transduction. Viable transduced cells were further enriched for primitive hematopoietic cells by exclusion of cells expressing linage markers (Gr-1, B220, Ter-119, CD4, CD5 and CD8) and selection for cells expressing the stem cell antigen-1 (Sca-1). Three independent experiments were performed for each of the four different conditions included in the study.

Project description:It is widely accepted that complex interactions between cancer cells and their surrounding microenvironment contribute to disease development, chemo-resistance and disease relapse. In light of this observed interdependency, novel therapeutic interventions that target specific cancer stroma cell lineages and their interactions are being sought. To this end, we studied a mouse model of human T cell acute lymphoblastic leukaemia (T-ALL) and used intravital microscopy to monitor the progression of disease within the bone marrow at both the tissue-wide and single cell level over time. We observed highly dynamic cellular interactions and promiscuous distribution of leukaemia cells that migrated across, and proliferated within multiple bone marrow sub-compartments. Unexpectedly, this environment-agnostic behaviour was maintained throughout disease development, starting from the earliest bone marrow seeding to the response and resistance to chemotherapy. Our results reveal that T-ALL cells do not depend on specific bone marrow microenvironments for propagation of disease, nor for the selection of chemo-resistant clones, suggesting a stochastic mechanism underlies these processes. Yet, while T-ALL infiltration and progression are niche-independent, accumulated disease burden leads to rapid, selective remodelling of the endosteal space, resulting in a complete loss of mature osteoblastic cells whilst perivascular cells are maintained. This outcome leads to a shift in the balance of endogenous bone marrow stroma, towards a composition associated with less efficient haematopoietic stem cell function1. This novel, dynamic analysis of T-ALL interactions with the bone marrow microenvironment in vivo highlights that future therapeutic interventions should target cancer cell-intrinsic mechanisms, rather than signals from specific bone marrow stroma, in order to combat the invasion by and survival of chemo-resistant T-ALL cells. Notch-1 T-ALL tumours were generated as previously described in (Hawkins et al., PLoS One, 2014 - doi: 10.1371/journal.pone.0087376.).The T-ALL mouse model was generated by retroviral transduction of C57Bl/6 E14.5 fetal liver cells as described in (Hawkins et al., PLoS One, 2014 - doi: 10.1371/journal.pone.0087376.). Whole transduced populations were transplanted into 8-14 week old female C57Bl/6 recipient mice. T cell acute lymphoblastic leukemia cells were positive for the fluorescent protein (GFP or DsRed) indicating expression of the Notch-1 intracellular protein. These tumours were most frequently CD4+8+ as originally described in (Aster, J. C. et al. Essential roles for ankyrin repeat and transactivation domains in induction of T-cell leukemia by notch1. Molecular and cellular biology 20, 7505-7515 (2000). Disease was confirmed by flow cytometry and 2-photon imaging. Mice reconstituted with Notch transduced foetal livers were monitored daily for signs of leukaemia onset or other signs of ill health. Tumours were harvested from bone marrow once full infiltration was established as confirmed by peripheral blood and bone marrow flow cytometry as well as 2-photon imaging. For treated samples, dexamethasone (Dexamethasone Sodium Phosphate - Sigma) was administered daily I.V. - 15mg/kg for 7 days. Tumours were isolated purified from bone marrow by FACS sorting based on expression of fluorescent protein expression (GFP+ or DsRed+).

Dataset Information

Expression data from mouse bone marrow cells expressing renin driven expression of green fluorescent protein.

Publications

Identification of renin progenitors in the mouse bone marrow that give rise to B-cell leukaemia.

Similar Datasets

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