Project description:This SuperSeries is composed of the following subset Series: GSE21846: Transcriptional profiling of 29 cases of diffuse large B cell lymphoma GSE21847: miRNA profiling of 29 cases of diffuse large B cell lymphoma GSE21848: miRNA profiling of 36 cases of diffuse large B cell lymphoma Refer to individual Series
Project description:29 cases of RCHOP treated DLBCL were profiled for miRNA expression. Different integrated annalysis were performed, including mirNA differential expression between cases classified according to the COO signature (see later) and correlation tests between gene and miRNA expression. Cases classified according to the cell of origin classsifer (Wright G, Tan B, Rosenwald A, Hurt EH, Wiestner A, Staudt LM. A gene expression-based method to diagnose clinically distinct subgroups of diffuse large B cell lymphoma. Proc Natl Acad Sci U S A 2003;100:9991-6.) based on gene expression were subjected to miRNA expression profiling.
Project description:29 cases of RCHOP treated DLBCL were profiled for gene expression. Different integrated annalysis were performed, including mirNA differential expression between cases classified according to the COO signature (see later) and correlation tests between gene and miRNA expression. After transcriptional profiling the cases were classified according to the cell of origin based on the classifier proposed by Wright et al (Wright G, Tan B, Rosenwald A, Hurt EH, Wiestner A, Staudt LM. A gene expression-based method to diagnose clinically distinct subgroups of diffuse large B cell lymphoma. Proc Natl Acad Sci U S A 2003;100:9991-6.).
Project description:Clonal heterogeneity in lymphoid malignancies has been recently reported in adult T-Cell lymphoma/leukemia, peripheral T-cell lymphoma, not otherwise specified, and mantle cell lymphoma (MCL). Our analysis was extended to other types of lymphoma including marginal zone lymphoma, follicular lymphoma, and diffuse large B-cell lymphoma (DLBCL). We examined the results of array comparative genomic hybridization analysis for 332 cases to determine if clonal heterogeneity existed in each case. Results showed that frequencies of clonal heterogeneity varied from 25% to 69% among different types of lymphoma. Multivariate analysis indicated that MCL and DLBCL with clonal heterogeneity showed a significantly poorer prognosis. Interestingly, 9p21.3 (CDKN2A/ 2B) loss and 17p13 (TP53, ATP1B2, SAT2, SHBG) loss were common regions among various types of lymphoma with clonal heterogeneity, suggesting at least in part that loss of these genes may play a role in clonal heterogeneity. We analyzed previously untreated 332 cases of lymphoma (comprising 29 cases of mantle cell lymphoma, 117 cases of diffuse large B-cell lymphoma (DLBCL), 79 cases of Follicular lymphoma, 24 cases of Burkitt lymphoma, 31 cases of mucosa-associated lymphoid tissue (MALT) lymphoma, and 51 peripheral T-cell lymphoma, not otherwise specified (PTCL-NOS)).
Project description:miRNA expression data from 36 cases of RCHOP treated DLBCL samples were correlated with clinical variables in order to find miRNA signatures related with outcome. Cases classified according to the cell of origin classsifer (Wright G, Tan B, Rosenwald A, Hurt EH, Wiestner A, Staudt LM. A gene expression-based method to diagnose clinically distinct subgroups of diffuse large B cell lymphoma. Proc Natl Acad Sci U S A 2003;100:9991-6.) based on gene expression were subjected to miRNA expression profiling.