Project description:Gene expression profile (GEP) was analyzed in DLBCL cases to compare early failure patients (10) vs. responding patients (29), to identify features associated to primary chemoresistance
Project description:We studied 498 de-novo adult DLBCL cases, which had been diagnosed between January 2002 and October 2009, as part of the International DLBCL Rituximab-CHOP Consortium Program Study We perform global gene expression profiling from formalin fixed paraffin embedded 498 DLBCL tissues RNA by SPIA mediated microarray detection and identified the distinct subgroups of the disease within DLBCL, known as germinal-center-B-cell-like (GCB), activated B-cell-like (ABC), and unclassified DLBCL (UC).
Project description:We studied 498 de-novo adult DLBCL cases, which had been diagnosed between January 2002 and October 2009, as part of the International DLBCL Rituximab-CHOP Consortium Program Study We perform global gene expression profiling from formalin fixed paraffin embedded 498 DLBCL tissues RNA by SPIA mediated microarray detection and identified the distinct subgroups of the disease within DLBCL, known as germinal-center-B-cell-like (GCB), activated B-cell-like (ABC), and unclassified DLBCL (UC). RNA of 498 FFPET DLBCL patient samples were extracted, amplified using a novel RNA amplicfication method, Single Primer Isothermal Amplification (SPIA, NuGen Inc.), and hybridized to Affymetrix HG-U133 Plus 2.0 GeneChips. This dataset is the collaboration between The University of Texas at MD Anderson Cancer Center and Roche Molecular Systems, Inc.
Project description:Canine lymphoma is the most common hematological cancer in dogs and shares many molecular and clinical characteristics with human Non-Hodgkin lymphoma (NHL). The standard treatment for canine lymphoma is the “CHOP” sequential multiagent chemotherapy protocol consisting of Cyclophosphamide, Doxorubicin (Hydroxydaunorubicin), Vincristine (Oncovin™), and Prednisone. Approximately 70 - 85% of patients treated with CHOP achieve clinical remission. However, duration of remission varies and the majority of dogs eventually relapse. To identify possible biomarkers for patients failing to achieve remission in response to CHOP, we performed RNA-Seq analysis on 25 cases of canine lymphoma taken at the start of their CHOP therapy regime, and determined patient progression free survival (PFS).
Project description:A "Cartes d'Identite des Tumeurs" (CIT) project from the french Ligue Nationale Contre le Cancer (http://cit.ligue-cancer.net). 53 samples hybridized on Affymetrix HG-U133A GeneChips arrays, for 53 patients with diffuse large B-cell lymphoma (DLBCL); patients are treated with CHOP (cyclophosphamide, doxorubicin, vincristine, prednisone) or Ritxumab (R)-CHOP in the Groupe dB^REtude des Lymphomes de lB^RAdulte (GELA) clinical centers.
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.
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.
Project description:This SuperSeries is composed of the following subset Series: GSE15142: Copy number abnormality, MYC activity and the genetic fingerprint of normal B-cells and the microRNA profile of DLBCL-21 GSE15177: Copy number abnormality, MYC activity and the genetic fingerprint of normal B-cells and the microRNA profile of DLBCL-77 Refer to individual Series
Project description:R-CHOP standard chemotherapy is successful in about 60% of patients with diffuse large B-cell lymphoma (DLBCL). Patients who do not benefit from it, due to tumor drug resistance, have a poor prognosis. To date, the available predictive biomarkers mainly relate to prognosis. We conducted the first prospective GWAS clinical study appositely designed to identify constitutional biomarkers predictive of R-CHOP efficacy and toxicity. Overall, 217 any stage chemonaive DLBCL patients candidate to R-CHOP were enrolled. ~800000 SNPs were analysed by the UK Biobank Axiom Array. Median age of eligible pts was 59.2 years, women were 49.7%. 45.4% of pts were in stage I-II. According to the revised IPI (R-IPI), 14.1%, 56.8% and 29.2% were in the very good (0), good (1-2) and poor (3-5) prognosis groups, respectively. 85.9% of pts obtained CR to R-CHOP. Based on the results obtained, we were able to build a seven-SNP score by summing the number of deleterious alleles from the SNPs for which highly significant associations with PFS were achieved. Wild-type patients showed a prolonged PFS compared with patients carrying 1 deleterious allele or 2+ deleterious alleles (p<0.001). When the score was applied to patients stratified according to R-IPI, wild-type patients classified as R-IPI 1-2 and R-IPI 3-5 showed a prolonged PFS compared with patients with the same respective R-IPI score carrying 1 deleterious allele or 2+ deleterious alleles (p<0.001). After a proper validation in an independent cohort of patients, the seven-SNP risk score could be proposed to select patients to whom offer a more aggressive treatment as well as an additional factor to those currently included in the R-IPI that could successfully contribute to predict response to R-CHOP.
Project description:Diffuse large B-cell lymphoma (DLBCL) is the most frequent entity among non-Hodgkin lymphoma (NHL). It is a clinically and biologically heterogeneous disease regarding treatment response and long-term outcome. The anthracycline-based regimen R-CHOP is still considered as the standard of care for first-line treatment allowing achieving a complete response for approximately 60% of the patients. The prognosis of patients with primary refractory or relapsed (R/R) disease is particularly poor with a median overall survival below one year. Only a fraction of R/R patients can be cured with salvage therapies due to the acquisition of chemoresistance. We conducted a large-scale and deep proteomic investigation of the proteome profiles of R/R DLBCL patients compared to chemosensitive patients in order to identify new potential biomarkers related to resistance to treatment and to better understand the biological mechanisms underlying chemoresistance.