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https://www.readbyqxmd.com/read/28643625/microbial-interactions-and-interventions-in-colorectal-cancer
#1
Terence Van Raay, Emma Allen-Vercoe
Recently, several lines of evidence that indicate a strong link between the development of colorectal cancer (CRC) and aspects of the gut microbiota have become apparent. However, it remains unclear how changes in the gut microbiota might influence carcinogenesis or how regional organization of the gut might influence the microbiota. In this review, we discuss several leading theories that connect gut microbial dysbiosis with CRC and set this against a backdrop of what is known about proximal-distal gut physiology and the pathways of CRC development and progression...
June 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28643167/microbiome-probiotics-and-neurodegenerative-diseases-deciphering-the-gut-brain-axis
#2
REVIEW
Susan Westfall, Nikita Lomis, Imen Kahouli, Si Yuan Dia, Surya Pratap Singh, Satya Prakash
The gut microbiota is essential to health and has recently become a target for live bacterial cell biotherapies for various chronic diseases including metabolic syndrome, diabetes, obesity and neurodegenerative disease. Probiotic biotherapies are known to create a healthy gut environment by balancing bacterial populations and promoting their favorable metabolic action. The microbiota and its respective metabolites communicate to the host through a series of biochemical and functional links thereby affecting host homeostasis and health...
June 22, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28641593/preliminary-evidence-for-an-association-between-the-composition-of-the-gut-microbiome-and-cognitive-function-in-neurologically-healthy-older-adults
#3
Lisa Manderino, Ian Carroll, M Andrea Azcarate-Peril, Amber Rochette, Leslie Heinberg, Christine Peat, Kristine Steffen, James Mitchell, John Gunstad
OBJECTIVES: Dysbiosis of the gut microbiome is implicated in numerous human health conditions. Animal studies have linked microbiome disruption to changes in cognitive functioning, although no study has examined this possibility in neurologically healthy older adults. METHODS: Participants were 43 community-dwelling older adults (50-85 years) that completed a brief cognitive test battery and provided stool samples for gut microbiome sequencing. Participants performing≥1 SD below normative performance on two or more tests were compared to persons with one or fewer impaired scores...
June 23, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28636668/microbiota-in-anorexia-nervosa-the-triangle-between-bacterial-species-metabolites-and-psychological-tests
#4
Francesca Borgo, Alessandra Riva, Alberto Benetti, Maria Cristina Casiraghi, Sara Bertelli, Stefania Garbossa, Simona Anselmetti, Silvio Scarone, Antonio E Pontiroli, Giulia Morace, Elisa Borghi
Anorexia nervosa (AN) is a psychiatric disease with devastating physical consequences, with a pathophysiological mechanism still to be elucidated. Metagenomic studies on anorexia nervosa have revealed profound gut microbiome perturbations as a possible environmental factor involved in the disease. In this study we performed a comprehensive analysis integrating data on gut microbiota with clinical, anthropometric and psychological traits to gain new insight in the pathophysiology of AN. Fifteen AN women were compared with fifteen age-, sex- and ethnicity-matched healthy controls...
2017: PloS One
https://www.readbyqxmd.com/read/28634323/intestinal-microbial-dysbiosis-aggravates-the-progression-of-alzheimer-s-disease-in-drosophila
#5
Shih-Cheng Wu, Zih-Syuan Cao, Kuo-Ming Chang, Jyh-Lyh Juang
Neuroinflammation caused by local deposits of Aβ42 in the brain is key for the pathogenesis and progression of Alzheimer's disease. However, inflammation in the brain is not always a response to local primary insults. Gut microbiota dysbiosis, which is recently emerging as a risk factor for psychiatric disorders, can also initiate a brain inflammatory response. It still remains unclear however, whether enteric dysbiosis also contributes to Alzheimer's disease. Here we show that in a Drosophila Alzheimer's disease model, enterobacteria infection exacerbated progression of Alzheimer's disease by promoting immune hemocyte recruitment to the brain, thereby provoking TNF-JNK mediated neurodegeneration...
June 20, 2017: Nature Communications
https://www.readbyqxmd.com/read/28630461/antrodia-cinnamomea-reduces-obesity-and-modulates-the-gut-microbiota-in-high-fat-diet-fed-mice
#6
C-J Chang, C-C Lu, C-S Lin, J Martel, Y-F Ko, D M Ojcius, T-R Wu, Y-H Tsai, T-S Yeh, J-J Lu, H-C Lai, J D Young
BACKGROUND: Obesity is associated with gut microbiota dysbiosis, disrupted intestinal barrier and chronic inflammation. Given the high and increasing prevalence of obesity worldwide, anti-obesity treatments that are safe, effective and widely available would be beneficial. We examined whether the medicinal mushroom Antrodia cinnamomea may reduce obesity in mice fed with a high-fat diet (HFD). METHODS: Male C57BL/6J mice were fed a HFD for eight weeks to induce obesity and chronic inflammation...
June 20, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28624575/intestinal-fungal-dysbiosis-associates-with-visceral-hypersensitivity-in-patients-with-irritable-bowel-syndrome-and-rats
#7
Sara Botschuijver, Guus Roeselers, Evgeni Levin, Daisy M Jonkers, Olaf Welting, Sigrid Em Heinsbroek, Heleen H de Weerd, Teun Boekhout, Matteo Fornai, Ad A Masclee, Frank H J Schuren, Wouter J de Jonge, Jurgen Seppen, Rene M van den Wijngaard
BACKGROUND & AIMS: Visceral hypersensitivity is one feature of irritable bowel syndrome (IBS). Bacterial dysbiosis might be involved in activation of nociceptive sensory pathways, but there have been few studies of the role of the mycobiome (the fungal microbiome) in development of IBS. We analyzed intestinal mycobiomes of patients with IBS and a rat model of visceral hypersensitivity. METHODS: We used internal transcribed spacer 1-based metabarcoding to compare fecal mycobiomes of 18 healthy volunteers with those of 39 patients with IBS (with visceral hypersensitivity or normal levels of sensitivity)...
June 14, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28621726/microbiota-and-probiotics-in-health-and-hiv-infection
#8
REVIEW
Chiara D'Angelo, Marcella Reale, Erica Costantini
Microbiota play a key role in various body functions, as well as in physiological, metabolic, and immunological processes, through different mechanisms such as the regulation of the development and/or functions of different types of immune cells in the intestines. Evidence indicates that alteration in the gut microbiota can influence infectious and non-infectious diseases. Bacteria that reside on the mucosal surface or within the mucus layer interact with the host immune system, thus, a healthy gut microbiota is essential for the development of mucosal immunity...
June 16, 2017: Nutrients
https://www.readbyqxmd.com/read/28613252/are-the-gut-bacteria-telling-us-to-eat-or-not-to-eat-reviewing-the-role-of-gut-microbiota-in-the-etiology-disease-progression-and-treatment-of-eating-disorders
#9
REVIEW
Yan Y Lam, Sarah Maguire, Talia Palacios, Ian D Caterson
Traditionally recognized as mental illnesses, eating disorders are increasingly appreciated to be biologically-driven. There is a growing body of literature that implicates a role of the gut microbiota in the etiology and progression of these conditions. Gut bacteria may act on the gut-brain axis to alter appetite control and brain function as part of the genesis of eating disorders. As the illnesses progress, extreme feeding patterns and psychological stress potentially feed back to the gut ecosystem that can further compromise physiological, cognitive, and social functioning...
June 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28608320/chronic-treatment-with-prebiotics-probiotics-and-synbiotics-attenuated-cardiac-dysfunction-by-improving-cardiac-mitochondrial-dysfunction-in-male-obese-insulin-resistant-rats
#10
Wannipa Tunapong, Nattayaporn Apaijai, Sakawdaurn Yasom, Pongpan Tanajak, Keerati Wanchai, Titikorn Chunchai, Sasiwan Kerdphoo, Sathima Eaimworawuthikul, Parameth Thiennimitr, Anchalee Pongchaidecha, Anusorn Lungkaphin, Wasana Pratchayasakul, Siriporn C Chattipakorn, Nipon Chattipakorn
PURPOSE: In metabolic syndrome, the composition of gut microbiota has been disrupted, and is associated with left ventricular (LV) dysfunction. Several types of prebiotics, probiotics, and synbiotics have been shown to exert cardioprotection by restoring gut microbiota from dysbiosis and reducing systemic inflammation. However, the effects of prebiotics such as xylooligosaccharides (XOS); probiotics such as Lactobacillus paracasei STII01 HP4, and synbiotics on metabolic and LV function in obese insulin-resistant rats have not been investigated...
June 12, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/28606969/faecal-microbiota-study-reveals-specific-dysbiosis-in-spondyloarthritis
#11
Maxime Breban, Julien Tap, Ariane Leboime, Roula Said-Nahal, Philippe Langella, Gilles Chiocchia, Jean-Pierre Furet, Harry Sokol
OBJECTIVE: Altered microbiota composition or dysbiosis is suspected to be implicated in the pathogenesis of chronic inflammatory diseases, such as spondyloarthritis (SpA) and rheumatoid arthritis (RA). METHODS: 16S ribosomal RNA gene sequencing was performed on faecal DNA isolated from stool samples in two consecutive cross-sectional cohorts, each comprising three groups of adult volunteers: SpA, RA and healthy controls (HCs). In the second study, HCs comprised a majority of aged-matched siblings of patients with known HLA-B27 status...
June 12, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28604843/alcohol-associated-intestinal-dysbiosis-impairs-pulmonary-host-defense-against-klebsiella-pneumoniae
#12
Derrick R Samuelson, Judd E Shellito, Vincent J Maffei, Eric D Tague, Shawn R Campagna, Eugene E Blanchard, Meng Luo, Christopher M Taylor, Martin J J Ronis, Patricia E Molina, David A Welsh
Chronic alcohol consumption perturbs the normal intestinal microbial communities (dysbiosis). To investigate the relationship between alcohol-mediated dysbiosis and pulmonary host defense we developed a fecal adoptive transfer model, which allows us to investigate the impact of alcohol-induced gut dysbiosis on host immune response to an infectious challenge at a distal organ, independent of prevailing alcohol use. Male C57BL/6 mice were treated with a cocktail of antibiotics (ampicillin, gentamicin, neomycin, vancomycin, and metronidazole) via daily gavage for two weeks...
June 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28604735/fungal-dysbiosis-immunity-and-interactions-at-mucosal-barriers
#13
REVIEW
Iliyan D Iliev, Irina Leonardi
Fungi and mammals share a co-evolutionary history and are involved in a complex web of interactions. Studies focused on commensal bacteria suggest that pathological changes in the microbiota, historically known as dysbiosis, are at the root of many inflammatory diseases of non-infectious origin. However, the importance of dysbiosis in the fungal community - the mycobiota - was only recently acknowledged to have a pathological role, as novel findings have suggested that mycobiota disruption can have detrimental effects on host immunity...
June 12, 2017: Nature Reviews. Immunology
https://www.readbyqxmd.com/read/28602746/role-of-oral-and-gut-microbiome-in-nitric-oxide-mediated-colon-motility
#14
REVIEW
Miriam Y Walker, Pratap S, Janet H Southerland, C Farmer-Dixon, L Kesavalu, P Gangula
Periodontal disease (PD), a severe form of gum disease, is among the most prevalent chronic infection in humans and is associated with complex microbial synergistic dysbiosis in the subgingival cavity. The immune system of the body interacts with the microbes as the plaque extends and propagates below the gingival sulcus. Once bacteria reach the gingival sulcus, it can enter the blood stream and affect various areas of the human body. The polymicrobial nature of periodontal disease, if left untreated, promotes chronic inflammation, not only within the oral cavity, but also throughout the human body...
June 7, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28602521/gut-microbiota-dysbiosis-in-postweaning-piglets-understanding-the-keys-to-health
#15
REVIEW
Raphaële Gresse, Frédérique Chaucheyras-Durand, Mickaël Alain Fleury, Tom Van de Wiele, Evelyne Forano, Stéphanie Blanquet-Diot
Weaning is a critical event in the pig's life cycle, frequently associated with severe enteric infections and overuse of antibiotics; this raises serious economic and public health concerns. In this review, we explain why gut microbiota dysbiosis, induced by abrupt changes in the diet and environment of piglets, emerges as a leading cause of post-weaning diarrhea, even if the exact underlying mechanisms remain unclear. Then, we focus on nonantimicrobial alternatives, such as zinc oxide, essential oils, and prebiotics or probiotics, which are currently evaluated to restore intestinal balance and allow a better management of the crucial weaning transition...
June 8, 2017: Trends in Microbiology
https://www.readbyqxmd.com/read/28600319/microbiome-and-nafld-potential-influence-of-aerobic-fitness-and-lifestyle-modification
#16
Matthew R Panasevich, Willem T Peppler, Daniel B Oerther, David C Wright, R Scott Rector
Nonalcoholic fatty liver disease (NAFLD) is a chronic liver disease with prevalence rates that are on the rise in the US and worldwide. NAFLD encompasses a spectrum of liver pathologies including simple steatosis to nonalcoholic steatohepatitis (NASH) with inflammation and fibrosis. The gut microbiome has emerged as a potential therapeutic target in combating metabolic diseases including obesity, type 2 diabetes, and NAFLD/NASH. Diet-induced obesity/Western style diet feeding causes severe microbial dysbiosis initiating a microbiome signature that promotes metabolite production that directly impacts hepatic metabolism...
June 9, 2017: Physiological Genomics
https://www.readbyqxmd.com/read/28599622/alteration-of-gut-microbiota-in-association-with-cholesterol-gallstone-formation-in-mice
#17
Qihan Wang, Long Jiao, Chuanqi He, Haidong Sun, Qu Cai, Tianquan Han, Hai Hu
BACKGROUND: The gut microbiome exerts extensive roles in metabolism of nutrients, pharmaceuticals, organic chemicals. Little has been known for the role of gut microbiota in regulating cholesterol and bile acids in association with gallstone formation. This study investigated the changes in the composition of gut microbiota in mice fed with lithogenic diet (LD). METHODS: Adult male C57BL/6 J mice were fed with either lithogenic diet (1.25% cholesterol and 0.5% cholic acid) or chow diet as control for 56 days...
June 9, 2017: BMC Gastroenterology
https://www.readbyqxmd.com/read/28598360/role-of-gut-microbiota-in-rheumatoid-arthritis
#18
REVIEW
Yuichi Maeda, Kiyoshi Takeda
Rheumatoid arthritis (RA) is a systemic autoimmune disease, caused by both genetic and environmental factors. Recently, investigators have focused on the gut microbiota, which is thought to be an environmental agent affecting the development of RA. Here we review the evidence from animal and human studies that supports the role of the gut microbiota in RA. We and others have demonstrated that the abundance of Prevotella copri is increased in some early RA. We have also used gnotobiotic experiments to show that dysbiosis in RA patients contributed to the development of Th17 cell-dependent arthritis in intestinal microbiota-humanized SKG mice...
June 9, 2017: Journal of Clinical Medicine
https://www.readbyqxmd.com/read/28597403/resistant-hypertension-mechanisms-and-treatment
#19
REVIEW
Andrew Y Hwang, Eric Dietrich, Carl J Pepine, Steven M Smith
PURPOSE OF REVIEW: Emerging evidence suggests that multiple mechanisms may be responsible for the development of treatment-resistant hypertension (TRH). This review aims to summarize recent data on potential mechanisms of resistance and discuss current pharmacotherapeutic options available in the management of TRH. RECENT FINDINGS: Excess sodium and fluid retention, increased activation of the renin-angiotensin-aldosterone system, and heightened activity of the sympathetic nervous system appear to play an important role in development of TRH...
July 2017: Current Hypertension Reports
https://www.readbyqxmd.com/read/28594392/the-human-gut-phage-community-and-its-implications-for-health-and-disease
#20
REVIEW
Pilar Manrique, Michael Dills, Mark J Young
In this review, we assess our current understanding of the role of bacteriophages infecting the human gut bacterial community in health and disease. In general, bacteriophages contribute to the structure of their microbial communities by driving host and viral diversification, bacterial evolution, and by expanding the functional diversity of ecosystems. Gut bacteriophages are an ensemble of unique and shared phages in individuals, which encompass temperate phages found predominately as prophage in gut bacteria (prophage reservoir) and lytic phages...
June 8, 2017: Viruses
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