ABSTRACT: proteomes of host cells infected with BCG during the early stage at 12, 24, and 48 h respectively to identify the potential bacterial components derived from BCG.
ORGANISM(S): Mycobacterium Tuberculosis Variant Bovis Bcg Str. Pasteur 1173p2
Project description:Using next-generation sequencing, we sequenced transcriptomes of A. thaliana plants infected by the pathogenic and the symbiotic fungus and analyzed plant and fungal gene expression changes between pathogenic and symbiotic interactions. Infected plants were sampled at early infection stages, 12, 24, 48 and 96 HPI (hours post inoculation)
Project description:The transcriptional profile of the porcine lung pathogen, Actinobacillus pleuropneumoniae, was monitored during the acute phase of infection in its natural host. Bacterial expression profiles of A. pleuropneumoniae isolated from lung lesions of 25 infected pigs were compared in samples taken 6, 12, 24 and 48 hours post infection.
Project description:Exosomes derived from S. Typhimurium-infected RAW264.7 macrophages (24 and 48 hpi) were isolated by differential ultracentrifugation. Equal protein samples in triplicates were subjected to protein extraction and separation by SDS-PAGE. Protein bands excised from each lane were reduced, alkylated, and digested with trypsin. Peptide pools were desalted by C18 columns and analyzed by liquid chromatography-Orbitrap Fusion tandem mass spectrometry
Project description:The fungal pathogen Sclerotinia sclerotiorum infects a broad range of dicotyledonous plant species and is the causative agent of stem rot in Brassica napus. To elucidate the mechanisms underlying the defense response, we studied the patterns of gene expression in a partially resistant variety of ZhongYou 821 (ZY821) and a susceptible line from Westar over five time points, 6, 12, 24, 48, and 72 hours post-inoculation (hpi) using a B. napus oligonucleotide microarray. Maximum differential gene expression was observed at 48 hpi in both genotypes with ZY821 responding more quickly than Westar. Specific sets of genes exhibited higher levels of expression at the earlier stages of the infection (6-12 hpi), including genes encoding defense-associated proteins such as chitinases, glucanases, osmotins and lectins and genes encoding transcription factors belonging to the zinc finger, WRKY, AP2, and MYB classes. Genes encoding enzymes involved in JA, ethylene, and auxin synthesis were induced in both genotypes, as were those for gibberellin degradation. Changes in metabolic pathways affecting carbohydrate and energy metabolism appeared to be directed toward shuttling carbon reserves to the TCA cycle. Genes involved in glucosinolate and phenylpropanoid biosynthesis were highly up-regulated suggesting that secondary metabolites are also important components of the response to S. sclerotiorum in B. napus. Keywords: Time course, and infected vs mock infected
Project description:Japanese Encephalitis Virus (JEV) modulates different proteins at different time points of infection to favour its propagation in the host cells. The dysregulation of intertwined pathways in the host has implications for virus pathogenesis. This study aims to decipher the global proteome of Japanese encephalitis infected THP-1 derived macrophages at 24 hours post-infection and 48 hours post-infection, which will further help to deduce the interwoven pathways regulated upon JEV infection.
Project description:Brucella abortus is an intracellular pathogen capable of establishing chronic infections through sophisticated immune evasion mechanisms. Among these, exosomes derived from infected macrophages have emerged as key vehicles of pathogen–host communication. In this study, we performed a comparative proteomic analysis of exosomes secreted by RAW 264.7 macrophages infected with B. abortus at 8 and 24 hours post-infection using LC-MS/MS. Exosomes displayed dynamic and functionally distinct proteomic profiles depending on infection time. At 8 hpi, profiles showed enrichment of proteins related to biosynthesis, energy metabolism, and endoplasmic reticulum processing, along with reduced abundance of proteins associated with lysosomes and antigen presentation. At 24 hpi, profiles shifted toward mitochondrial and redox regulatory pathways, while suppression of immune-related processes persisted. Exclusive proteins were identified in each phase, including retromer complex components and immune mediators such as Csf3, Gsdmd, and Ifi35. Notably, bacterial proteins were consistently detected in exosomes: GroEL and SodC were present at both 8 and 24 hpi, whereas Omp19, Omp2b, DnaK, and the invasion protein B homolog BAB1_0368 were restricted to the early phase. These findings indicate that exosomes derived from B. abortus–infected macrophages are not mere byproducts, but active mediators of bacterial persistence and immune modulation, with potential as biomarkers and therapeutic tools.
Project description:The fungal pathogen Sclerotinia sclerotiorum infects a broad range of dicotyledonous plant species and is the causative agent of stem rot in Brassica napus. To elucidate the mechanisms underlying the defense response, we studied the patterns of gene expression in a partially resistant variety of ZhongYou 821 (ZY821) and a susceptible line from Westar over five time points, 6, 12, 24, 48, and 72 hours post-inoculation (hpi) using a B. napus oligonucleotide microarray. Maximum differential gene expression was observed at 48 hpi in both genotypes with ZY821 responding more quickly than Westar. Specific sets of genes exhibited higher levels of expression at the earlier stages of the infection (6-12 hpi), including genes encoding defense-associated proteins such as chitinases, glucanases, osmotins and lectins and genes encoding transcription factors belonging to the zinc finger, WRKY, AP2, and MYB classes. Genes encoding enzymes involved in JA, ethylene, and auxin synthesis were induced in both genotypes, as were those for gibberellin degradation. Changes in metabolic pathways affecting carbohydrate and energy metabolism appeared to be directed toward shuttling carbon reserves to the TCA cycle. Genes involved in glucosinolate and phenylpropanoid biosynthesis were highly up-regulated suggesting that secondary metabolites are also important components of the response to S. sclerotiorum in B. napus. Keywords: Time course, infected vs mock infected
Project description:The analysis of differentially regulated mRNAs candidates in THP-1 cells infected with H37Rv was conducted, comparing them to both uninfected THP-1 cells and transfected reference samples. THP-1 cells are monocytes that differentiate into macrophages after being treated with PMA for 48 hours. Total RNA was isolated from the infected and transfected THP-1 cells at 24 hours post-infection.
Project description:Transcriptional profiling of N-Tera2 differentiated human neuronal cells, comparing control uninfected cells to HCoV-OC43 infected cells at 24, 48 and 72 hour post-infection Keywords: Cell response to viral infection
Project description:The fungal pathogen Sclerotinia sclerotiorum infects a broad range of dicotyledonous plant species and is the causative agent of stem rot in Brassica napus. To elucidate the mechanisms underlying the defense response, we studied the patterns of gene expression in a partially resistant variety of ZhongYou 821 (ZY821) and a susceptible line from Westar over five time points, 6, 12, 24, 48, and 72 hours post-inoculation (hpi) using a B. napus oligonucleotide microarray. For each cultivar, a two-dye experiment was run comparing infected to mock-infected stem tissue. For each time point, 6 microarray slides were done (3 biological replicates, with a dye swap for each biological replicate). This SuperSeries is composed of the SubSeries listed below.