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microRNA gut microbiome

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https://www.readbyqxmd.com/read/30449315/plant-derived-exosomal-micrornas-shape-the-gut-microbiota
#1
Yun Teng, Yi Ren, Mohammed Sayed, Xin Hu, Chao Lei, Anil Kumar, Elizabeth Hutchins, Jingyao Mu, Zhongbin Deng, Chao Luo, Kumaran Sundaram, Mukesh K Sriwastva, Lifeng Zhang, Michael Hsieh, Rebecca Reiman, Bodduluri Haribabu, Jun Yan, Venkatakrishna Rao Jala, Donald M Miller, Kendall Van Keuren-Jensen, Michael L Merchant, Craig J McClain, Juw Won Park, Nejat K Egilmez, Huang-Ge Zhang
The gut microbiota can be altered by dietary interventions to prevent and treat various diseases. However, the mechanisms by which food products modulate commensals remain largely unknown. We demonstrate that plant-derived exosome-like nanoparticles (ELNs) are taken up by the gut microbiota and contain RNAs that alter microbiome composition and host physiology. Ginger ELNs (GELNs) are preferentially taken up by Lactobacillaceae in a GELN lipid-dependent manner and contain microRNAs that target various genes in Lactobacillus rhamnosus (LGG)...
November 14, 2018: Cell Host & Microbe
https://www.readbyqxmd.com/read/30376063/a-cohabiting-bacterium-alters-the-spectrum-of-short-rnas-secreted-by-escherichia-coli
#2
Olga V Alikina, Olga A Glazunova, Alexandr A Bykov, Sergey S Kiselev, Maria N Tutukina, Konstantin S Shavkunov, Olga N Ozoline
Recently, it has been found that bacteria secrete short RNAs able to affect gene expression in eukaryotic cells, while certain mammalian microRNAs shape the gut microbiome altering bacterial transcriptome. The involvement of bacterial RNAs in communication with other bacteria is also expected, but has not been documented yet. Here, we compared the fractions of extremely short (12-22 nucleotides) RNAs secreted by Escherichia coli grown in a pure culture and jointly with bacteria of the Paenibacillus genus. Besides fragments of rRNAs and tRNAs, abundant in all samples, secreted oligonucleotides (exoRNAs) predominantly contained GC-rich fragments of messenger and antisense RNAs processed from regions with stable secondary structures...
December 1, 2018: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/30020932/diurnal-oscillations-in-human-salivary-microrna-and-microbial-transcription-implications-for-human-health-and-disease
#3
Steven D Hicks, Neil Khurana, Jeremy Williams, Cindy Dowd Greene, Richard Uhlig, Frank A Middleton
The microbiome plays a vital role in human health and disease. Interaction between human hosts and the microbiome occurs through a number of mechanisms, including transcriptomic regulation by microRNA (miRNA). In animal models, circadian variations in miRNA and microbiome elements have been described, but patterns of co-expression and potential diurnal interaction in humans have not. We investigated daily oscillations in salivary miRNA and microbial RNA to explore relationships between these components of the gut-brain-axis and their implications in human health...
2018: PloS One
https://www.readbyqxmd.com/read/29909116/altered-microrna-regulation-of-short-chain-fatty-acid-receptors-in-the-hypertensive-kidney-is-normalized-with-hydrogen-sulfide-supplementation
#4
Gregory J Weber, Jaleyea Foster, Sathnur B Pushpakumar, Utpal Sen
Hypertension affects nearly one third of the adult US population and is a significant risk factor for chronic kidney disease (CKD). An expanding body of recent studies indicates that gut microbiome has crucial roles in regulating physiological processes through, among other mechanisms, one mode of short chain fatty acids (SCFA) and their target receptors. In addition, these SCFA receptors are potential targets of regulation by host miRNAs, however, the mechanisms through which this occurs is not clearly defined...
August 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29795787/interaction-between-host-micrornas-and-the-gut-microbiota-in-colorectal-cancer
#5
Ce Yuan, Michael B Burns, Subbaya Subramanian, Ran Blekhman
Although variation in gut microbiome composition has been linked with colorectal cancer (CRC), the factors that mediate the interactions between CRC tumors and the microbiome are poorly understood. MicroRNAs (miRNAs) are known to regulate CRC progression and are associated with patient survival outcomes. In addition, recent studies suggested that host miRNAs can also regulate bacterial growth and influence the composition of the gut microbiome. Here, we investigated the association between miRNA expression and microbiome composition in human CRC tumor and normal tissues...
May 2018: MSystems
https://www.readbyqxmd.com/read/29365082/early-microbial-colonization-affects-dna-methylation-of-genes-related-to-intestinal-immunity-and-metabolism-in-preterm-pigs
#6
Xiaoyu Pan, Desheng Gong, Duc Ninh Nguyen, Xinxin Zhang, Qi Hu, Hanlin Lu, Merete Fredholm, Per T Sangild, Fei Gao
Epigenetic regulation may play an important role in mediating microbe-host interactions and adaptation of intestinal gene expression to bacterial colonization just after birth. This is particularly important after preterm birth because the immature intestine is hypersensitive to invading bacteria. We compared the intestinal DNA methylome and microbiome between conventional (CON) and antibiotics-treated (AB) preterm pigs, used as a model for preterm infants. Oral AB treatment reduced bacterial density (∼100-fold), diversity and fermentation, improved the resistance to necrotizing enterocolitis (NEC) and changed the genome-wide DNA methylation in the distal small intestine...
January 19, 2018: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/29021788/micrornas-based-inter-domain-communication-between-the-host-and-members-of-the-gut-microbiome
#7
REVIEW
Maggie R Williams, Robert D Stedtfeld, James M Tiedje, Syed A Hashsham
The gut microbiome is an important modulator of host gene expression, impacting important functions such as the innate immune response. Recent evidence suggests that the inter-domain communication between the gut microbiome and host may in part occur via microRNAs (small, non-coding RNA molecules) which are often differentially expressed in the presence of bacteria and can even be released and taken up by bacteria. The role of microRNAs in microbiome-host communication in intestinal diseases is not fully understood, particularly in diseases impacted by exposure to environmental toxicants...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28838324/microbial-regulation-of-microrna-expression-in-the-amygdala-and-prefrontal-cortex
#8
Alan E Hoban, Roman M Stilling, Gerard M Moloney, Rachel D Moloney, Fergus Shanahan, Timothy G Dinan, John F Cryan, Gerard Clarke
BACKGROUND: There is growing evidence for a role of the gut microbiome in shaping behaviour relevant to many psychiatric and neurological disorders. Preclinical studies using germ-free (GF) animals have been essential in contributing to our current understanding of the potential importance of the host microbiome for neurodevelopment and behaviour. In particular, it has been repeatedly demonstrated that manipulation of the gut microbiome modulates anxiety-like behaviours. The neural circuits that underlie anxiety- and fear-related behaviours are complex and heavily depend on functional communication between the amygdala and prefrontal cortex (PFC)...
August 25, 2017: Microbiome
https://www.readbyqxmd.com/read/28753429/fusobacterium-nucleatum-promotes-chemoresistance-to-colorectal-cancer-by-modulating-autophagy
#9
TaChung Yu, Fangfang Guo, Yanan Yu, Tiantian Sun, Dan Ma, Jixuan Han, Yun Qian, Ilona Kryczek, Danfeng Sun, Nisha Nagarsheth, Yingxuan Chen, Haoyan Chen, Jie Hong, Weiping Zou, Jing-Yuan Fang
Gut microbiota are linked to chronic inflammation and carcinogenesis. Chemotherapy failure is the major cause of recurrence and poor prognosis in colorectal cancer patients. Here, we investigated the contribution of gut microbiota to chemoresistance in patients with colorectal cancer. We found that Fusobacterium (F.) nucleatum was abundant in colorectal cancer tissues in patients with recurrence post chemotherapy, and was associated with patient clinicopathological characterisitcs. Furthermore, our bioinformatic and functional studies demonstrated that F...
July 27, 2017: Cell
https://www.readbyqxmd.com/read/28357349/control-of-the-gut-microbiome-by-fecal-microrna
#10
COMMENT
Shirong Liu, Howard L Weiner
Since their discovery in the early 90s, microRNAs (miRNAs), small non-coding RNAs, have mainly been associated with posttranscriptional regulation of gene expression on a cell-autonomous level. Recent evidence has extended this role by adding inter-species communication to the manifold functional range. In our latest study [Liu S, et al. , 2016, Cell Host & Microbe], we identified miRNAs in gut lumen and feces of both mice and humans. We found that intestinal epithelial cells (IEC) and Hopx+ cells were the two main sources of fecal miRNA...
March 9, 2016: Microbial Cell
https://www.readbyqxmd.com/read/28105518/associations-between-hepatic-mirna-expression-liver-triacylglycerols-and-gut-microbiota-during-metabolic-adaptation-to-high-fat-diet-in-mice
#11
Vincent Blasco-Baque, Berengère Coupé, Aurelie Fabre, Sandra Handgraaf, Pierre Gourdy, Jean-François Arnal, Michael Courtney, Carole Schuster-Klein, Beatrice Guardiola, François Tercé, Rémy Burcelin, Matteo Serino
AIMS/HYPOTHESIS: Despite the current pandemic of metabolic diseases, our understanding of the diverse nature of the development of metabolic alterations in people who eat a high-fat diet (HFD) is still poor. We recently demonstrated a cardio-metabolic adaptation in mice fed an HFD, which was characterised by a specific gut and periodontal microbiota profile. Since the severity of hepatic disease is characterised by specific microRNA (miRNA) signatures and the gut microbiota is a key driver of both hepatic disease and miRNA expression, we analysed the expression of three hepatic miRNA and studied their correlation with hepatic triacylglycerol content and gut microbiota...
April 2017: Diabetologia
https://www.readbyqxmd.com/read/27981307/microbiota-small-rnas-in-inflammatory-bowel-disease
#12
REVIEW
Anca T Filip, Ovidiu Balacescu, Catalin Marian, Andrei Anghel
MiRNAs are a class of potential gene regulators of critical importance in Inflammatory Bowel Disease (IBD). This review aims to present the connection between gut microbiota, probiotics administration and microRNA (miRNA) expression in IBD. It also brings into question cross-kingdom RNAi (RNA interference). Not only that gut host cells garden the intestinal microbiome via miRNA, but also strong evidence supports the idea that different species of bacteria have an impact on the intestinal immune response by modulating miRNA expression...
December 2016: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/27801835/dietary-gluten-induced-gut-dysbiosis-is-accompanied-by-selective-upregulation-of-micrornas-with-intestinal-tight-junction-and-bacteria-binding-motifs-in-rhesus-macaque-model-of-celiac-disease
#13
COMPARATIVE STUDY
Mahesh Mohan, Cheryl-Emiliane T Chow, Caitlin N Ryan, Luisa S Chan, Jason Dufour, Pyone P Aye, James Blanchard, Charles P Moehs, Karol Sestak
The composition of the gut microbiome reflects the overall health status of the host. In this study, stool samples representing the gut microbiomes from 6 gluten-sensitive (GS) captive juvenile rhesus macaques were compared with those from 6 healthy, age- and diet-matched peers. A total of 48 samples representing both groups were studied using V4 16S rRNA gene DNA analysis. Samples from GS macaques were further characterized based on type of diet administered: conventional monkey chow, i.e., wheat gluten-containing diet (GD), gluten-free diet (GFD), barley gluten-derived diet (BOMI) and reduced gluten barley-derived diet (RGB)...
October 28, 2016: Nutrients
https://www.readbyqxmd.com/read/27586459/vascular-microrna-204-is-remotely-governed-by-the-microbiome-and-impairs-endothelium-dependent-vasorelaxation-by-downregulating-sirtuin1
#14
Ajit Vikram, Young-Rae Kim, Santosh Kumar, Qiuxia Li, Modar Kassan, Julia S Jacobs, Kaikobad Irani
Gut microbiota promotes atherosclerosis, and vascular endothelial dysfunction, signalled by impaired endothelium-dependent vasorelaxation, is an early marker of atherosclerosis. Here we show that vascular microRNA-204 (miR-204) expression is remotely regulated by the microbiome, and impairs endothelial function by targeting the Sirtuin1 lysine deacetylase (Sirt1). MiR-204 is downregulated, while Sirt1 is upregulated, in aortas of germ-free mice. Suppression of gut microbiome with broad-spectrum antibiotics decreases miR-204, increases Sirt1 and bioavailable vascular nitric oxide, and improves endothelium-dependent vasorelaxation in mouse aortas...
September 2, 2016: Nature Communications
https://www.readbyqxmd.com/read/26970951/mismatch-repair-and-colon-cancer-mechanisms-and-therapies-explored
#15
REVIEW
Stephen K H Li, Alberto Martin
Colorectal cancer (CRC) remains one of the most prevalent cancers worldwide. In sporadic CRC, mutations frequently occur in the DNA mismatch repair (MMR) pathway. In addition, germline MMR mutations have been linked to Lynch syndrome, the most common form of hereditary CRC. Although genetic mutations, diet, inflammation, and the gut microbiota can influence CRC, it is unclear how MMR deficiency relates to these factors to modulate disease. In this review, the association of MMR to the etiology of CRC is examined, particularly in the context of microRNAs (miRNAs), inflammation, and the microbiome...
April 2016: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/26837709/gut-microbiota-host-faecal-mirna-regulates-gut-microbiota
#16
COMMENT
Hugh Thomas
No abstract text is available yet for this article.
March 2016: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/26811607/association-of-fusobacterium-nucleatum-with-immunity-and-molecular-alterations-in-colorectal-cancer
#17
REVIEW
Katsuhiko Nosho, Yasutaka Sukawa, Yasushi Adachi, Miki Ito, Kei Mitsuhashi, Hiroyoshi Kurihara, Shinichi Kanno, Itaru Yamamoto, Keisuke Ishigami, Hisayoshi Igarashi, Reo Maruyama, Kohzoh Imai, Hiroyuki Yamamoto, Yasuhisa Shinomura
The human intestinal microbiome plays a major role in human health and diseases, including colorectal cancer. Colorectal carcinogenesis represents a heterogeneous process with a differing set of somatic molecular alterations, influenced by diet, environmental and microbial exposures, and host immunity. Fusobacterium species are part of the human oral and intestinal microbiota. Metagenomic analyses have shown an enrichment of Fusobacterium nucleatum (F. nucleatum) in colorectal carcinoma tissue. Using 511 colorectal carcinomas from Japanese patients, we assessed the presence of F...
January 14, 2016: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/26764595/the-host-shapes-the-gut-microbiota-via-fecal-microrna
#18
Shirong Liu, Andre Pires da Cunha, Rafael M Rezende, Ron Cialic, Zhiyun Wei, Lynn Bry, Laurie E Comstock, Roopali Gandhi, Howard L Weiner
The host gut microbiota varies across species and individuals but is relatively stable over time within an individual. How the host selectively shapes the microbiota is largely unclear. Here, we show that fecal microRNA (miRNA)-mediated inter-species gene regulation facilitates host control of the gut microbiota. miRNAs are abundant in mouse and human fecal samples and present within extracellular vesicles. Cell-specific loss of the miRNA-processing enzyme, Dicer, identified intestinal epithelial cells (IEC) and Hopx-positive cells as predominant fecal miRNA sources...
January 13, 2016: Cell Host & Microbe
https://www.readbyqxmd.com/read/26456940/microrna-146a-constrains-multiple-parameters-of-intestinal-immunity-and-increases-susceptibility-to-dss-colitis
#19
Marah C Runtsch, Ruozhen Hu, Margaret Alexander, Jared Wallace, Dominique Kagele, Charisse Petersen, John F Valentine, Noah C Welker, Mary P Bronner, Xinjian Chen, Daniel P Smith, Nadim J Ajami, Joseph F Petrosino, June L Round, Ryan M O'Connell
Host-microbial interactions within the mammalian intestines must be properly regulated in order to promote host health and limit disease. Because the microbiota provide constant immunological signals to intestinal tissues, a variety of regulatory mechanisms have evolved to ensure proper immune responses to maintain homeostasis. However, many of the genes that comprise these regulatory pathways, including immune-modulating microRNAs (miRNAs), have not yet been identified or studied in the context of intestinal homeostasis...
October 6, 2015: Oncotarget
https://www.readbyqxmd.com/read/26337113/effects-of-maternal-obesity-on-fetal-programming-molecular-approaches
#20
REVIEW
Caterina Neri, Andrea G Edlow
Maternal obesity has become a worldwide epidemic. Obesity and a high-fat diet have been shown to have deleterious effects on fetal programming, predisposing offspring to adverse cardiometabolic and neurodevelopmental outcomes. Although large epidemiological studies have shown an association between maternal obesity and adverse outcomes for offspring, the underlying mechanisms remain unclear. Molecular approaches have played a key role in elucidating the mechanistic underpinnings of fetal malprogramming in the setting of maternal obesity...
September 3, 2015: Cold Spring Harbor Perspectives in Medicine
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