Project description:RNA-seq analysis of Pseudomonas sp OST1909 exposed to various preparations of naphthenic acids samples led to the identiifcation of many NA-induced genes.
Project description:We have demonstrated that thymic B cells, and more concretely CD21-CD35-, are highly heterogeneous in human neonates. To unravel the heterogeneity, we sorted and analyzed the transcriptome by single-cell RNA sequencing the CD21-CD35- B cell subset in six human donors of 4 days and 4 months old.
Project description:The whole proteome analysis of the Pseudomonas sp. FIP_A4 strain in presence and absence of fipronil was conducted to evaluate the differentially expressed enzymes that can play role in fipronil degradation.
Project description:To compare gene expression profile of FCRL5+ and FCRL5- tissue-like memory B cells (CD21-/lo/CD27-/CD19+), we have employed whole genome microarray expression profiling to identify differentially regulated genes in these two B cell subgroups. B cells freshly isolated from leukapheresis of healthy donors were used in the experiment.
Project description:Complement receptor 2–negative (CR2/CD21–) B cells have been found enriched in patients with autoimmune diseases and in common variable immunodeficiency (CVID) patients who are prone to autoimmunity. However, the physiology of CD21–/lo B cells remains poorly characterized. We found that some rheumatoid arthritis (RA) patients also display an increased frequency of CD21–/lo B cells in their blood. A majority of CD21–/lo B cells from RA and CVID patients expressed germline autoreactive antibodies, which recognized nuclear and cytoplasmic structures. In addition, these B cells were unable to induce calcium flux, become activated, or proliferate in response to B-cell receptor and/or CD40 triggering, suggesting that these autoreactive B cells may be anergic. Moreover, gene array analyses of CD21–/lo B cells revealed molecules specifically expressed in these B cells and that are likely to induce their unresponsive stage. Thus, CD21–/lo B cells contain mostly autoreactive unresponsive clones, which express a specific set of molecules that may represent new biomarkers to identify anergic B cells in humans.
