Project description:We investigated miRNA expression in Holstein dairy cow of mammary gland with different producing quality milk using high-throughput sequence and qRT-PCR techniques. miRNA libraries were constructed from mammary gland tissues taken from a high producing quality milk and a low producing quality milk Holstein dairy cow, the small RNA digitalization analysis based on HiSeq high-throughput sequencing takes the SBS-sequencing by synthesis.The libraries included 4732 miRNAs. A total of 124 miRNAs in the high producing quality milk mammary gland showed significant differences in expression compared to low producing quality milk mammary gland (P<0.05). Conclusion: Our study provides a broad view of the bovine mammary gland small RNA expression profile characteristics. Differences in types and expression levels of miRNAs were observed between high producing quality milk and a low producing quality milk Holstein dairy cow
Project description:There is a wide diversity of potential applications for direct electron transfer from electrodes to microorganisms, which might be better optimized if the mechanisms for this novel electrode-biofilm interaction were better understood. Geobacter sulfurreducens is one of the few microorganisms available in pure culture that is known to be capable of directly accepting electrons from a negatively poised electrode. A microarray comparison of cells accepting electrons from the electrode versus cells donating electrons to the electrode reveals that the genes previously observed to be upregulated in current-producing biofilms are not highly expressed in current-consuming biofilms.
Project description:Populations of engineered metabolite-producing microorganisms are prone to evolutionary production declines during industrial-scale cultivations. In this study, we develop a synthetic product addiction system in E coli that addicts mevalonic acid production cells to mevalonic acid. Through experimentally simuluated long-term fermentation, we investigate how product-addicted organisms remain stable and avoid formation of genetic subpopulations of fit, non-producing cells.
Project description:Understanding how C. elegans interacts with the bacteria it feeds upon enables us to better comprehend the complex interactions occurring at the interface of host and microbe. Here we have assessed the proteome of C. elegans after growth on bacteria capable of colonising the gut via a comparative analysis of C. elegans grown on two environmentally obtained species of Ochrobactrum (MYb71 and MYb237) verses C. elegans grown on E. coli OP50. A total of 4,677 C. elegans proteins were identified, with quantification under our criteria possible for more than 84% (3,941) of these proteins. Significant alterations in protein abundances were observed for 122 proteins, 48 higher in abundance and 74 lower in abundance. We observed an increase in abundance of proteins potentially regulated via host signalling pathways, in addition to several proteins involved in the breakdown and detoxification of foreign entities (e.g. lipase, proteases, glutathione metabolism). Of the proteins decreased in abundance, a number are involved in both degradation (branch chain amino acids) and biosynthesis (cysteine, methionine, glycine, serine and threonine) of amino acids. While enzymes associated with the degradation of peptidoglycan were also less abundant (Lys-4, Lys-5). The differences observed in C. elegans following growth on alternative food source bacteria, as opposed to the normal E. coli OP50, help to highlight the subtle nuances that are, more often than not, overlooked in classical host pathogen studies.
Project description:Escherichia coli and Staphylococcus aureus are two common pathogenic microorganisms that cause mastitis in dairy cows. They can cause clinical mastitis and subclinical mastitis. In recent studies, lncRNAs have been found to play an important role in the immune responses triggered by microbial inducers. However, the actions of lncRNAs in bovine mastitis remain unclear. The purpose of this study was to explore the lncRNA profile on mastitis.