Project description:To investigate the microRNAs involved in the processes of beneficial and detrimental lifestyles, including caloric restriction(CR), exercise and high-fat diet(HF), we performed a comprehensive and thorough comparison of microRNAs expression profiles in liver among these lifestyle modifications.
Project description:The objective of this study was to examine relationships between weight loss through changes in lifestyle and peripheral blood gene expression profiles. Substantial weight loss (-15.2+3.8%) in lifestyle participants was associated with improvement in selected cardiovascular risk factors and significant changes in peripheral blood gene expression from pre- to post-intervention: 132 unique genes showed significant expression changes related to immune function and inflammatory responses involving endothelial activation. In contrast, participants losing minimal weight (-3.1+2.5%) showed only minor changes in cardiovascular risk factors and markers of inflammation, and no changes in gene expression compared to non-intervention controls after 1 year. Weight loss (>10%) during lifestyle modification is associated with down-regulation of genetic pathways governing interactions between circulating immune cells and the vascular endothelium and may be required to successfully reduce CVD risk. A prospective nonrandomized trail was conducted over 1 year in participants undergoing intensive lifestyle modification to reverse or stabilize progression of coronary artery disease. Cardiovascular risk factors, inflammatory biomarkers, and gene expression as a function of weight loss were assessed in 89 lifestyle participants and 71 retrospectively matched controls undergoing usual care.
Project description:The objective of this study was to examine relationships between weight loss through changes in lifestyle and peripheral blood gene expression profiles. Substantial weight loss (-15.2+3.8%) in lifestyle participants was associated with improvement in selected cardiovascular risk factors and significant changes in peripheral blood gene expression from pre- to post-intervention: 132 unique genes showed significant expression changes related to immune function and inflammatory responses involving endothelial activation. In contrast, participants losing minimal weight (-3.1+2.5%) showed only minor changes in cardiovascular risk factors and markers of inflammation, and no changes in gene expression compared to non-intervention controls after 1 year. Weight loss (>10%) during lifestyle modification is associated with down-regulation of genetic pathways governing interactions between circulating immune cells and the vascular endothelium and may be required to successfully reduce CVD risk.
Project description:BackgroundMicroRNAs play an important role in many fundamental biological and pathological processes. Defining the microRNAs profile underlying the processes by beneficial and detrimental lifestyles, including caloric restriction (CR), exercise and high-fat diet (HF), is necessary for understanding both normal physiology and the pathogenesis of metabolic disease. We used the microarray to detect microRNAs expression in livers from CR, EX and HF mice models. After predicted potential target genes of differentially expressed microRNAs with four algorithms, we applied GO and KEGG to analyze the function of predicted microRNA targets.ResultsWe describe the overall microRNAs expression pattern, and identified 84 differentially expressed microRNAs changed by one or two or even all the three lifestyle modifications. The common and different enriched categories of gene function and main biochemical and signal transduction pathways were presented.ConclusionsWe provided for the first time a comprehensive and thorough comparison of microRNAs expression profiles in liver among these lifestyle modifications. With this knowledge, our findings provide us with an overall vision of microRNAs in the molecular impact of lifestyle on health as well as useful clues for future and thorough research of the role of microRNAs.
Project description:Epigenome analysis of 18 subjects and 20 controls, before, midpoint, and after a change in diet, exercise, and other lifestyle modifications
Project description:We sought to examine whether urolithin A could alleviate the alcohol-related liver disease. RNA-sequencing (RNA-seq) on mice livers were performed in order to identify the key biological processes and pathways regulated by urolithin A.
Project description:The degradation and 3′ end modification of plant microRNAs (miRNAs) play crucial roles in regulating miRNA function and stability. However, the process and mechanism of miRNA degradation and 3′ end modification has, to date, been poorly characterized. Here, we report that analysis of the two small RNA libraries constructed from two hickory floral differentiation stages by deep sequencing obtained a large number of truncated miRNAs and miRNAs with 3′ end modifications. The presence of so many truncated miRNAs suggests that plant miRNAs may be degraded through the 5′ to 3′ and 3′ to 5′ ends simultaneously, but the probability of miRNAs being truncated from the 3′ end was higher than from the 5′ end. Single- or double-nucleotide 3′ additions to miRNAs has been observed in many families. In this study, the 3′ addition of adenine to miRNA was the most common, accounting for more than 50% of all miRNA 3′ end modification in both small RNA libraries, followed by uridine addition. This suggests that the 3′ end modification of miRNAs shows a bias towards adenine and uridine in plants. Furthermore, we observed that both truncated miRNA and isomiR expressions associated with mature miRNAs. Our study provides more information regarding the degradation and 3′ end modification of miRNAs in plants. Examination of 2 different female flower buds
Project description:microRNA dysregulation is a common feature of cancer cells, but the complex roles of microRNAs in cancer are not fully elucidated. Here we used functional genomics to identify oncogenic microRNAs in non-small cell lung cancer and to evaluate their impact on response to EGFR targeting therapy. Our data demonstrate that microRNAs with an AAGUGC-motif in their seed-sequence increase both cancer cell proliferation and sensitivity to EGFR inhibitors. Global transcriptomics, proteomics and target prediction resulted in the identification of several tumor suppressors involved in the G1/S transition as targets of AAGUGC-microRNAs. The clinical implications of our findings were evaluated by analysis of public domain data supporting the link between this microRNA seed-family, their tumor suppressor targets and cancer cell proliferation. In conclusion we propose that AAGUGC-microRNAs are an integral part of an oncogenic signaling network, and that these findings have potential therapeutic implications, especially in selecting patients for EGFR-targeting therapy.