Project description:We isolated an efficient doxycycline degrading strain Chryseobacterium sp. WX1. To investigate gene expression patterns during doxycyclinedegradation by strain WX1, we conducted a comparative transcriptomic analysis using cultures of strain WX1 with and without doxycycline addition. The RNA-Seq data revealed that 90.44-96.56% of the reads mapped to the genome of Chryseobacterium sp. WX1 across all samples. Differentially expressed genes (DEGs) analysis (|log2FC| >2; p < 0.01) showed that 693 genes were significantly up-regulated and 592 genes were significantly down-regulated.
Project description:In this study, we isolated a potent doxycycline-degrading bacterium, Chryseobacterium sp. WX1, from environmental samples. To elucidate the molecular mechanisms underlying doxycycline degradation by strain WX1, we assessed and interpreted the proteomic profiles of Chryseobacterium sp. WX1 under conditions both with and without doxycycline exposure.
Project description:Mouse peritoneal B1a cells were classified into two groups based upon the expression level of PC1. One is PC1 high group and the other is PC1 low. To evaluate gene expression patterns that distinguished PC1 high expressing B1a cells from PC1 low expressing B1a cells, we used Affymetrix GeneChip® Mouse gene 1.0 ST Array.
Project description:Mouse peritoneal B1a cells were classified into two groups based upon the expression level of PC1. One is PC1 high group and the other is PC1 low. To evaluate gene expression patterns that distinguished PC1 high expressing B1a cells from PC1 low expressing B1a cells, we used Affymetrix GeneChipM-BM-. Mouse gene 1.0 ST Array. FACS-sorted PC1 high and low cells from individual mouse were used for RNA extraction and Affyarray hybridization. There were six independent biological replications in each group - six cases of PC1 high cells and six cases of PC1 low cells.
Project description:In our previous work, our investigation on macrophages has allowed us to show that the inhibition of the enzyme proprotein convertase (PC1/3) controls the activation of macrophages. We demonstrated that PC1/3 knockdown (KD) in macrophages would exhibit an increased secretion of pro-inflammatory and anti-tumoral factors. In this biological context, we assessed for histone modifications and for the presence and contribution of a “Ghost proteome” in these macrophages. In addition, we have identified a set of alternative proteins (AltProts) that have a key role in regulating various signaling pathways. In this study, to further investigate the underlying mechanisms involved in resistance of PC1/3 KD macrophages to anti-inflammatory stimuli, we have conducted a proteomics-systems biology study to assess the epigenome variation focusing on histone modifications and to investigate for the potential contribution of AltProts in regulating PC1/3 KD macrophages resistance. Results from our study have indicated the presence of significant variations in histone modifications along with the identification of 28 AltProts with in part involved in anti-tumoral resistance under IL-10 stimulation. These findings highlight that key role of altered epigenome histone modifications in driving resistance and indicates that, like the reference proteins, AltProts have major impact in the field of epigenetics and regulation of gene expression as shown in our results