Project description:We investigated transcriptional response of CaCo-2 cells to iron treatments, we studied hemin effect by adding hemin to DMEM-FBS medium and iron deficiency effects in using an iron free medium compared to the same supplemented with FAC (ferric ammonium citrate). Keywords: various iron treatment, differential gene expression, hemin treatment, iron-free
Project description:Origanum oil (ORO), garlic oil (GAO), and peppermint oil (PEO) were shown to effectively lower methane production, decrease abundance of methanogens, and change abundances of several bacterial populations important to feed digestion in vitro. In this study, the impact of these essential oils (EOs, at 0.50 g/L), on the rumen bacterial community composition was further examined using the recently developed RumenBactArray.
Project description:We investigated transcriptional response of CaCo-2 cells to iron treatments, we studied hemin effect by adding hemin to DMEM-FBS medium and iron deficiency effects in using an iron free medium compared to the same supplemented with FAC (ferric ammonium citrate). Experiment Overall Design: Biological replicates were used (3 samples) of each iron treatments (SF-FAC, SF-0, DMEM-FBS, DMEM-Hemin). Each sample was labelled with cy5 and a pool of each sample was constituted and labelled with cy3.
Project description:Two Near Isogenic soybean (Glycine max) lines were grown in hydroponic conditions with either 50uM ferric nitrate or 100uM ferric nitrate. After 10 days, half the plants were harvested (total root tissue). At 12 days after planting, iron was added to plants grown in low iron conditions bringing them up to sufficient iron growth conditions. Root tissue was harvested for the remaining plants at 14 days after planting. Gene expression analysis from root tissue of two Near Isogenic Lines (NILs), Clark (PI548553) and IsoClark (PI547430), grown in iron stress or iron stress recovered conditions.
Project description:Ruminant livestock are one of the major contributors to carbon emission contributing the global warming issue. Methane (CH4) produced from enteric microbial fermentation of feed in the reticulo-rumen are known to differ between sheep with different digestive function and fermentation products such as metabolites. However, the molecular mechanism underpinning differences in methane emission remains to be fully elucidated. We extracted a membrane and cytosolic protein fraction of rumen epithelium proteins from both high (H) and low (L) CH4 emitting sheep. Protein abundance differences between the phenotypes were quantified using SWATH-mass spectrometry. We identified 92 proteins annotated as cell surface transporters, of which only solute carrier family (SLC) 40A1 had a greater fold change of protein expression in the high methane emission phenotype. The main difference in protein abundance we found were related to the metabolism of glucose, lactate and processes of cell defence against microbes in the epithelium of sheep in each group. To best of our knowledge, this represents one of the most comprehensive proteomes of ovine rumen epithelium to date.
Project description:To obtain deeper understanding of atmospheric dynamics of the potent greenhouse gas methane, controlling factors of methanotrophs, as the sole biological methane sink, is necessary. Recent research has revealed complex interactions between methanotrophs and heterotrophs, involving volatile organic compounds (VOCs). In environments with high methane concentrations VOC-mediated interactions significantly influence methane cycling and emissions. Here, we employed a multidisciplinary approach, utilizing proteomics, volatile analysis, and measurements of bacterial growth and methane oxidation to elucidate underlying mechanisms of VOC-mediated interactions between heterotrophs and methanotrophs. The results demonstrate that specific VOCs, like dimethylpolysulfides, released by heterotrophic bacteria can inhibit growth and methane uptake of methanotrophs, while other VOCs had the opposite effect. Proteomics analysis revealed differential protein expression patterns depending on exposure to the volatolome of a heterotrophic bacterium or with CO2 added, which was most pronounced with the particulate and soluble methane monooxygenase. The current study demonstrated potential biotic modulation of methanotrophy without direct contact, caused by VOC or CO2 from respiration, or both, with a proteomic response. Although further research is needed to elucidate the specific mechanisms involved, it is clear that methanotroph-heterotroph interactions need to be investigated closer to informs strategies for mitigating emission of the greenhouse gas methane.
Project description:Anaerobic methanogens are an important part of the global carbon cycle and energy supply. With industrialization, Fluoranthene (Flu) accumulated in soils, sediments, and sewage plants etc., giving an uncertain impact on methane production of methanogens. Here, the effect of Flu on Methanosarcina barkeri (M. barkeri) were investigated in this paper. The methane yield of strain with 0.01 and 0.1 mg/L Flu was 1.43 and 1.65 times higher than the control. The growth of M. barkeri was also maximized at Flu of 0.1 mg/L with 1.37-fold than control. The physiological features of M. barkeri were enhanced by 0.1 mg/L Flu, such as, cell viability (154%), total-EPS (1.82-fold), and SOD enzyme activity (1.28 times). Notably, TMT proteomics provided a novel insight to reveal that Flu activated the methanogenic metabolic pathway and ABC transporters of M. barkeri, particularly promoted it to synthesize MtrA/C/D/E/G/H (8.2 times total), FrhA/B/G, iron (III)/zinc/molybdenum/vitamin B12 ABC transporter proteins, and the groups of methyltransferase and coenzyme F420 hydrogenase. The upregulated expression of methanogenesis-related enzyme proteins resulted in increased generation and transfer of methane. Overall, this study shed light on the impact of organic pollutants on global carbon cycle of M. barkeri from the molecular biology perspective.
Project description:Iron plays an important role in oxidative tissue damage and subsequent carcinogenesis. Iron deposition in the peritoneum causes neoplastic changes. Here we used microRNA (miR) microarrays in a rat model by repeated intraperitoneal injections of ferric saccharate. miR microarray revealed the miR-199/214 as a distinctive feature of sarcomatoid mesothelioma.