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Genome-wide profiling of tumor cells in multiple myeloma

ABSTRACT: In multiple myeloma (MM), endothelial progenitor cells (EPCs) regulate tumor angiogenesis and disease progression. They share a common bone marrow microenvironment with myeloma tumor cells. CD138+ tumor plasma cells from 12 newly diagnosed patients with advanced MM were examined for genomic instability by RNA microarrays to assess changes in gene expression.

ORGANISM(S): Homo sapiens

PROVIDER: GSE28327 | GEO | 2011/04/02

SECONDARY ACCESSION(S): PRJNA143213

REPOSITORIES: GEO

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Genome-wide profiling of tumor cells in multiple myeloma

Project description:In multiple myeloma (MM), endothelial progenitor cells (EPCs) regulate tumor angiogenesis and disease progression. They share a common bone marrow microenvironment with myeloma tumor cells. CD138+ tumor plasma cells from 12 newly diagnosed patients with advanced MM were examined for genomic instability by RNA microarrays to assess changes in gene expression. Tumor cells were derived from single-cell suspensions of bone marrow (BM) aspirates from newly diagnosed MM patients, and RNA was extracted for microarray hybridization.

2011-04-02 | E-GEOD-28327 | biostudies-arrayexpress

Genome-wide array comparative genomic hybridization (aCGH) profiling of endothelial progenitor cells, and their comparison to tumor plasma cells, in multiple myeloma

2011-04-02 | GSE28329 | GEO

Genome-wide array comparative genomic hybridization (aCGH) profiling of endothelial progenitor cells, and their comparison to tumor plasma cells, in multiple myeloma

Project description:In multiple myeloma (MM), endothelial progenitor cells (EPCs) regulate tumor angiogenesis and disease progression. EPCs from 16 newly diagnosed patients with advanced MM were examined for genomic instability by aCGH to assess chromosomal gains and losses. Data were compared to aCGH results from corresponding CD138+ tumor plasma cells from these patients. EPCs and tumor cells were derived from single-cell suspensions of bone marrow (BM) aspirates from newly diagnosed MM patients, and total genomic DNA was extracted for aCGH. DNA from healthy male peripheral blood mononuclear cells (PBMCs; Promega, Madison, WI) was used as the normal control DNA.

2011-04-02 | E-GEOD-28329 | biostudies-arrayexpress

Genome-wide profiling of endothelial progenitor cells in multiple myeloma

2011-04-02 | GSE28326 | GEO

Genome-wide profiling of endothelial progenitor cells in multiple myeloma

Project description:In multiple myeloma (MM), endothelial progenitor cells (EPCs) regulate tumor angiogenesis and disease progression. EPCs from 20 newly diagnosed patients with advanced MM were examined for genomic instability by RNA microarrays to assess changes in gene expression. EPCs were derived from single-cell suspensions of bone marrow (BM) aspirates from newly diagnosed MM patients, and RNA was extracted for microarray hybridization.

2011-04-02 | E-GEOD-28326 | biostudies-arrayexpress

Transcription profiling of bone marrow plasma cells from 320 newly diagnosed multiple myeloma patients

Project description:In order to identify relevant, molecularly defined subgroups in Multiple Myeloma (MM), gene expression profiling (GEP) was performed on purified CD138+ plasma cells of 320 newly diagnosed myeloma patients included in the Dutch-Belgian/German HOVON-65/ GMMG-HD4 trial using Affymetrix Gene Chip U133 plus 2.0 arrays. Hierarchical clustering identified 10 distinct subgroups. Bone marrow plasma cell samples were obtained from 320 newly diagnosed multiple myeloma patients included in a large multicenter, prospective, randomized phase III trial (HOVON65/GMMG-HD4). Purified myeloma plasma cells samples with a monoclonal plasma cell purity > 80% were used for analysis.

2010-06-27 | E-GEOD-19784 | biostudies-arrayexpress

Classification of Myeloma Using Global MicroRNA Profiling

Project description:Myeloma is a heterogeneous disease. In this work we used global microRNA profiling to classify clinical samples from UK MRC Myeloma IX, and developed a microRNA-based M-bM-^@M-^\outcome classifierM-bM-^@M-^] for risk stratification. Global microRNA expression profiling was carried out in 163 newly diagnosed samples from CD138+ cell selection

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Phenotypic, genomic and functional characterization reveals no differences between CD138++ and CD138low subpopulations in multiple myeloma cell lines

Project description:Despite recent advances in the treatment of multiple myeloma (MM), it remains an incurable disease potentially due to the presence of resistant myeloma cancer stem cells (MM-CSC). Although the presence of clonogenic cells in MM was described more than 30 years ago, the phenotype of MM-CSC is still a matter of debate, especially with respect to the expression of syndecan- 1 (CD138). Here, we demonstrate the presence of two subpopulations - CD138++ (95-99%) and CD138low (1-5%) - in eight MM cell lines. To find out possible stem-cell-like features, we have phenotypically, genomic and functionally characterized the two subpopulations. Our results show that the minor CD138low subpopulation is morphologically identical to the CD138++ fraction and does not represent a more immature B-cell compartment (with lack of CD19, CD20 and CD27 surface expression). Moreover, both subpopulations have similar gene expression and genomic profiles. Importantly, both CD138++ and CD138low subpopulations have similar sensitivity to bortezomib, melphalan and doxorubicin. Finally, serial engraftment in SCID mice shows that CD138++ as well as CD138low cells have self-renewal potential and they are also phenotypically interconvertible. Overall, our results differ from previously published data which attribute a B-cell phenotype to MM-CSC and urge the need to explore more reliable markers to discriminate true clonogenic myeloma cells.

2014-05-19 | GSE49482 | GEO

Phenotypic, genomic and functional characterization reveals no differences between CD138++ and CD138low subpopulations in multiple myeloma cell lines (Copy Number)

2014-05-19 | GSE49483 | GEO

Affymetrix SNP array data from BM-CD138+, obtained from newly diagnosed Multiple Myeloma patients

Project description:The iperactivation of self-renewal mechanisms, like Hedgehog (HH) pathway, which govern the refuel of Multiple Myeloma neoplastic clone, is critical to relapse events. The bulk of current knowledge is mainly based on the CD138+ cells molecular characterization, but in the light of the recent evidences, which attributed growing relevance to immature precursor clones, we become aware that multiple myeloma disease heterogeneity have more deepen roots. Here, we report on a high-throughput transcriptome study of gene expression profiles in newly diagnosed MM patients analyzed both in the CD138+ plasmacell fraction and in the CD19+ B cells compartment. Resulted data demonstrated that Hedgehog pathway, and in particular, a 10 HH-genes signature was heterogeneously expressed among MM patients, both in mature plasmacells and also in B cells at transcriptional level. Interestingly, this signature divide patients in two subgroups, and it seems that exists a sort of “ying-yang effect” between mature and immature cell compartments that are tightly regulate in order to express this relevant self-renewal pathway according to their maturation state.

2016-05-31 | GSE68999 | GEO

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