Project description:Purpose: To detect the diffirential expressed genes in LNCaP cells transfected with VIM-AS1 overexression vetor and control pcDNA3.1 vector Method: Transcriptome sequencing was sued to detect the diffirential expressed genes in LNCaP cells transfected with VIM-AS1 overexression vetor and control pcDNA3.1 vector Results :We performed transcriptome sequencing to identify the target genes in VIM-AS1 overexpressed LNCaP cells and normal control. 67 genes were found statistically up-regulated more than two-fold and 187 genes were found statistically down-regulated more than two-fold in VIM-AS1 overexpressed LNCaP cells Conclusion:Our study represents the first detailed analyasis of transcriptomes in LNCaP cells with VIM-AS1 overexpression and control cells.
Project description:GFAP and vimentin deficiency alters gene expression in astrocytes and microglia in wild-type mice and changes the transcriptional response of reactive glia in mouse model for Alzheimer's disease. Reactive astrocytes with an increased expression of intermediate filament (IF) proteins Glial Fibrillary Acidic Protein (GFAP) and Vimentin (VIM) surround amyloid plaques in Alzheimer's disease (AD). The functional consequences of this upregulation are unclear. To identify molecular pathways coupled to IF regulation in reactive astrocytes, and to study the interaction with microglia, we examined WT and APPswe/PS1dE9 (AD) mice lacking either GFAP, or both VIM and GFAP, and determined the transcriptome of cortical astrocytes and microglia from 15- to 18-month-old mice. Genes involved in lysosomal degradation (including several cathepsins) and in inflammatory response (including Cxcl5, Tlr6, Tnf, Il1b) exhibited a higher AD-induced increase when GFAP, or VIM and GFAP, were absent. The expression of Aqp4 and Gja1 displayed the same pattern. The downregulation of neuronal support genes in astrocytes from AD mice was absent in GFAP/VIM null mice. In contrast, the absence of IFs did not affect the transcriptional alterations induced by AD in microglia, nor was the cortical plaque load altered. Visualizing astrocyte morphology in GFAP-eGFP mice showed no clear structural differences in GFAP/VIM null mice, but did show diminished interaction of astrocyte processes with plaques. Microglial proliferation increased similarly in all AD groups. In conclusion, absence of GFAP, or both GFAP and VIM, alters AD-induced changes in gene expression profile of astrocytes, showing a compensation of the decrease of neuronal support genes and a trend for a slightly higher inflammatory expression profile. However, this has no consequences for the development of plaque load, microglial proliferation, or microglial activation. 2 cell types from 6 conditions: cortical microglia and cortical astrocytes from 15-18 month old APPswe/PS1dE9 mice compared to wildtype littermates. Biological replicates: microglia from APPswe/PS1dE9, N=7, microglia from WT, N=7, astrocytes from APPswe/PS1dE9, N=4, microglia from WT, N=4
Project description:To investigate the mechanism of PmB resistance and heteroresistance in Enterobacter bugandensis by analysing the differential gene expression under PmB treatment.
Project description:Background: Efflux pumps are important cofactors for carbapenem resistance in Enterobacter cloacae. The regulatory mechanism by which asmA influences efflux pump function in this species remains unclear. This study explored the regulatory role of asmA on efflux pumps in carbapenem-resistant Enterobacter cloacae. Results: Sixteen carbapenem-resistant Enterobacter cloacae were collected. All strains carried blaNDM, 87.5% of which were blaNDM-1 and 12.5% were blaNDM-5. PAβN had weak inhibition on carbapenem resistance in ST78 and strong inhibition in ST2260. ST2260(CY-8) was still resistant to carbapenems after elimination of blaNDM and could be inhibited by PAβN. However, ST78(CY-9) lost its resistance to carbapenems. Knockout of asmA reduced the MIC of ST2260 by 16-fold. ST78 showed no such changes. Growth curves revealed impaired growth only in ST2260ΔasmA. Transcriptomics/qRT-PCR revealed no significantly altered acrAB-tolC or marA expression in either strain. Membrane proteomics detected AcrB loss specifically in ST2260ΔasmA. The loss of asmA affected a wide range of membrane proteins, especially OmpW. Molecular docking predicted that AsmA could bind to AcrB, with stronger binding energy in ST78. The buried area of the CY-8 model involved 110 contact residues, while the number of contacts of the CY-9 model increased to 144. The AsmA chain of the two models had 46 common contact residues, and the AcrB chain had 60 common contact residues. AcrB of ST78 generally carries the I277V mutation. Conclusion: asmA is highly conserved in Enterobacter cloacae. It has functional heterogeneity in different ST types. In ST2260, asmA can affect efflux pump-mediated carbapenem resistance. AsmA can regulate AcrAB-TolC not by affecting marA. It is predicted that AsmA can maintain the carbapenem resistance of Enterobacter cloacae ST2260 by helping AcrB anchor to the inner membrane. The difference in carbapenem resistance mediated by efflux pumps between ST78 and ST2260 suggests that ST78 commonly carries the AcrB I277V mutation, which is a key site for efflux of β-lactams.