Project description:B cell depletion therapy is efficacious in RA patients failing on TNF blocking agents. However, approximately 40-50% of the rituximab-treated RA patients have a poor response. We investigated wheter baseline gene expression levels can discriminate between clinical nonresponders and responders to rituximab Whole blood total RNA is isolated from PAXgene tubes obtained prior to start of rituximab treatment
Project description:24 independent follicular lymphoma lymph node samples on LC microarrays was used to generate the gene lists in tables 2 and 3 of publication patients were divided into two groups, rituximab responders (composed of CR and PR) and non-responders (composed of NR and MR). Set of arrays organized by shared biological context, such as organism, tumors types, processes, etc. Keywords: Logical Set
Project description:Objective: We performed whole-blood transcriptomic profiling for patients with rheumatoid arthritis (RA) who received rituximab (RTX). We aimed to identify a molecular signature that could predict the clinical response to RTX and transcriptomic changes after RTX therapy. Methods: We performed a microarray assay of the whole human genome with RNA from a peripheral blood sample taken before the first RTX cycle from 68 patients included in the SMART study (24 EULAR non-responders and 44 responders at week 24). The transcriptomic profile was also assessed 24 weeks after the first RTX administration
Project description:B cell depletion therapy is efficacious in RA patients failing on TNF blocking agents. However, approximately 40-50% of the rituximab-treated RA patients have a poor response. We investigated wheter baseline gene expression levels can discriminate between clinical nonresponders and responders to rituximab
Project description:Analysis of gene-expression changes in treatment responders vs non-responders to two different treatments among subjectrs participating in LiTMUS. Results provide information on pathways that may be involved in the clinical response to Lithium in patients with bipolar disorder. Total RNA isolated from PAXgene blood RNA tubes from 60 subjects with bipolar disorder, randomized to 2 treatment groups (OPT, Li+OPT) at 2 time-points (baseline, 1 month after treatment)
Project description:Analysis of gene-expression changes in treatment responders vs non-responders to two different treatments among subjectrs participating in LiTMUS. Results provide information on pathways that may be involved in the clinical response to Lithium in patients with bipolar disorder.
Project description:New and effective therapeutical options are available for the treatment of Rheumatoid Arthritis. One of such treatments is rituximab, and chimeric anti-CD20 antibody that selectively depletes the CD20+ B cell subpopulation. Similar to established anti-TNF alpha therapies, there is a subgroup of RA patients that do not experience significant clinical response. Therefore, one of the major necessities in actual RA therapeutical management is to identify reliable predictors of the response to this therapies. In the present study we have evaluated 3 blood cell types (i.e. whole blood, isolated B cells and isolated CD4 T cells) using microarray gene expression profiling to identify their potential use as biomarkers for rituximab response. In all three tissues evaluated, we have identified statistically significant differentially expressed genes. The most relevant candidates have been reevaluated using RealTime PCR. These genes were: TRAF1 and arginase 1 in whole blood, Toll-Like Receptor 4 (TLR4) in CD4+ T cells and AT-rich interactive domain 3A (ARID3A) in B cells. In the present study we have demonstrated the potential of different blood cell types for the prediction of the response to rituximab. In particular, we have found a set of relevant candidate genes that could be the basis for future treatment response prediction.
Project description:As hepatitis B virus is widely spread, WHO recommend vaccination from infancy to reduce acute infection and chronic carriers. However current subunit vaccines are not 100% efficacious and leaves 5-10% persistent non-responders unprotected. To handle large inter-individual variability in immune response after the first Engerix-B vaccination, we employed whole blood early gene expression signatures at day 3 and 7. Immune related pathways are differential expressed in the responders group mostly at day 3 and at day 7 in the non-responders. A notable difference between both groups are significant differential expressed genes at day 0, before vaccination, showing the inter-individual variation. The granulin precursor (GRN) was significant downregulated in responders while upregulated in non-responders. Further absolute granulocytes numbers were significant higher in non-responders. So there is a certain diversity in basic innate immune system.
Project description:Five year survival rates for pancreatic cancer remain low, around 11%. We assessed differential gene expression between SBRT responders and non-responders as well as expression pre and post SBRT. Samples were obtained from the University of Colorado biorepository. All patients had borderline resectable pancreatic cancer, treated with neoadjuvant chemotherapy followed by restaging, and treatment with 30–33.6 Gy SBRT to pancreatic tumors, followed by pancreaticoduodenectomy and adjuvant chemotherapy. We observed increases in PDL1, PD1, CD25, and a decrease in CD122 expression following RT. Furthermore, we found that responders to SBRT exhibit decrased CD25 expression with increased CD122 and CD132 expression compared to non-responders. Using GSEA of responders vs. non-responders, we found responders to SBRT exhibit enrichment of inflammatory response, IFN signaling, and IL2/STAT5 signaling.
