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Microbiome AND cancer

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https://www.readbyqxmd.com/read/28934351/the-microbiome-and-the-hallmarks-of-cancer
#1
Laura E Fulbright, Melissa Ellermann, Janelle C Arthur
No abstract text is available yet for this article.
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28924229/variations-in-oral-microbiota-associated-with-oral-cancer
#2
Hongsen Zhao, Min Chu, Zhengwei Huang, Xi Yang, Shujun Ran, Bin Hu, Chenping Zhang, Jingping Liang
Individual bacteria and shifts in microbiome composition are associated with human disease, including cancer. To unravel the connections underlying oral bacterial dysbiosis and oral squamous cell carcinoma (OSCC), cancer lesion samples and anatomically matched normal samples were obtained from the same patients. We then profiled the bacteria within OSCC lesion surface samples at the species level using next-generation sequencing to comprehensively investigate bacterial community composition and functional genes in these samples...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28917668/gut-microbe-mediated-suppression-of-inflammation-associated-colon-carcinogenesis-by-luminal-histamine-production
#3
Chunxu Gao, Bhanu Priya Ganesh, Zhongcheng Shi, Rajesh Rasik Shah, Robert Fultz, Angela Major, Susan Venable, Monica Lugo, Kathleen Hoch, Xiaowei Chen, Anthony Haag, Timothy C Wang, James Versalovic
Microbiome-mediated suppression of carcinogenesis may open new avenues for identification of therapeutic targets and prevention strategies in oncology. Histidine decarboxylase (HDC) deficiency has been shown to promote inflammation-associated colorectal cancer by accumulation of CD11b(+)Gr-1(+) immature myeloid cells, indicating a potential antitumorigenic effect of histamine. Here, we demonstrate that administration of hdc(+)Lactobacillus reuteri in the gut resulted in luminal hdc gene expression and histamine production in the intestines of Hdc(-/-) mice...
September 6, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28915922/recent-urbanization-in-china-is-correlated-with-a-westernized-microbiome-encoding-increased-virulence-and-antibiotic-resistance-genes
#4
Kathryn Winglee, Annie Green Howard, Wei Sha, Raad Z Gharaibeh, Jiawu Liu, Donghui Jin, Anthony A Fodor, Penny Gordon-Larsen
BACKGROUND: Urbanization is associated with an increased risk for a number of diseases, including obesity, diabetes, and cancer, which all also show associations with the microbiome. While microbial community composition has been shown to vary across continents and in traditional versus Westernized societies, few studies have examined urban-rural differences in neighboring communities within a single country undergoing rapid urbanization. In this study, we compared the gut microbiome, plasma metabolome, dietary habits, and health biomarkers of rural and urban people from a single Chinese province...
September 15, 2017: Microbiome
https://www.readbyqxmd.com/read/28912574/distinct-gut-microbiome-patterns-associate-with-consensus-molecular-subtypes-of-colorectal-cancer
#5
Rachel V Purcell, Martina Visnovska, Patrick J Biggs, Sebastian Schmeier, Frank A Frizelle
Colorectal cancer (CRC) is a heterogeneous disease and recent advances in subtype classification have successfully stratified the disease using molecular profiling. The contribution of bacterial species to CRC development is increasingly acknowledged, and here, we sought to analyse CRC microbiomes and relate them to tumour consensus molecular subtypes (CMS), in order to better understand the relationship between bacterial species and the molecular mechanisms associated with CRC subtypes. We classified 34 tumours into CRC subtypes using RNA-sequencing derived gene expression and determined relative abundances of bacterial taxonomic groups using 16S rRNA amplicon metabarcoding...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899670/definition-pathogenesis-and-management-of-that-cursed-dyspepsia
#6
REVIEW
Pramoda Koduru, Malcolm Irani, Eamonn M M Quigley
Dyspepsia is an umbrella term used to encompass a number of symptoms thought to originate from the upper gastrointestinal tract. These symptoms are relatively non-specific; not surprisingly, therefore, a myriad of conditions may present with any one or a combination of these symptoms. Therein lies the clinician's first challenge: detecting the minority who may have a potentially life-threatening disorder, such as gastric cancer, from a population whose symptoms are, for the most part, considered functional in origin...
September 9, 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28888753/the-role-of-gut-microbiome-in-the-pathogenesis-of-prostate-cancer-a-prospective-pilot-study
#7
David M Golombos, Abimbola Ayangbesan, Padraic O'Malley, Patrick Lewicki, LaMont Barlow, Christopher E Barbieri, Chrystal Chan, Casey DuLong, Galeb Abu-Ali, Curtis Huttenhower, Douglas S Scherr
OBJECTIVE: To elucidate potential biomarkers or mechanistic principles involved with the gut microbiota and its impact on prostate cancer pathogenesis. MATERIALS AND METHODS: A prospective case-control pilot study evaluating the gut microbiome of 20 men with either benign prostatic conditions (n = 8) or intermediate/high risk clinically localized prostate cancer (Gleason ≥4+3 cN0M0) (n = 12) undergoing care at tertiary referral center from 9/1/2015 - 3/1/2016...
September 6, 2017: Urology
https://www.readbyqxmd.com/read/28877044/novel-insights-into-microbiome-in-colitis-and-colorectal-cancer
#8
Ye Yang, Christian Jobin
PURPOSE OF REVIEW: Microbiota is a major player in the pathogenesis of inflammatory bowel diseases (IBD) and colorectal cancer (CRC). Here, we summarize the key advances achieved in the past 18 months (ending June 2017) toward a better understanding of the role of microbiota in colitis and CRC development. RECENT FINDINGS: Accumulating evidence shows the essential role of intestinal barrier function (e.g. mucus, IgA, LCN2, LYPD8) in protecting against bacteria-induced inflammation and tumor development...
September 5, 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28852094/unraveling-the-gut-microbiome-of-the-long-lived-naked-mole-rat
#9
Tewodros Debebe, Elena Biagi, Matteo Soverini, Susanne Holtze, Thomas Bernd Hildebrandt, Claudia Birkemeyer, Dereje Wyohannis, Alemayehu Lemma, Patrizia Brigidi, Vulk Savkovic, Brigitte König, Marco Candela, Gerd Birkenmeier
The naked mole-rat (Heterocephalus glaber) is a subterranean mouse-sized African mammal that shows astonishingly few age-related degenerative changes and seems to not be affected by cancer. These features make this wild rodent an excellent model to study the biology of healthy aging and longevity. Here we characterize for the first time the intestinal microbial ecosystem of the naked mole-rat in comparison to humans and other mammals, highlighting peculiarities related to the specific living environment, such as the enrichment in bacteria able to utilize soil sulfate as a terminal electron acceptor to sustain an anaerobic oxidative metabolism...
August 29, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28845459/moderate-exercise-has-limited-but-distinguishable-effects-on-the-mouse-microbiome
#10
Emily V Lamoureux, Scott A Grandy, Morgan G I Langille
The gut microbiome is known to have a complex yet vital relationship with host health. While both exercise and the gut microbiome have been shown to impact human health independently, the direct effects of moderate exercise on the intestinal microbiota remain unclear. In this study, we compared gut microbial diversity and changes in inflammatory markers associated with exercise over an 8-week period in mice that performed either voluntary exercise (VE) (n = 10) or moderate forced exercise (FE) (n = 11) and mice that did not perform any exercise (n = 21)...
July 2017: MSystems
https://www.readbyqxmd.com/read/28844981/marine-natural-product-peptides-with-therapeutic-potential-chemistry-biosynthesis-and-pharmacology
#11
REVIEW
Vedanjali Gogineni, Mark T Hamann
The oceans are a uniquely rich source of bioactive metabolites, of which sponges have been shown to be among the most prolific producers of diverse bioactive secondary metabolites with valuable therapeutic potential. Much attention has been focused on marine bioactive peptides due to their novel chemistry and diverse biological properties. As summarized in this review, marine peptides are known to exhibit various biological activities such as antiviral, anti-proliferative, antioxidant, anti-coagulant, anti-hypertensive, anti-cancer, antidiabetic, antiobesity, and calcium-binding activities...
August 24, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28837129/large-scale-comparative-metagenomics-of-blastocystis-a-common-member-of-the-human-gut-microbiome
#12
Francesco Beghini, Edoardo Pasolli, Tin Duy Truong, Lorenza Putignani, Simone M Cacciò, Nicola Segata
The influence of unicellular eukaryotic microorganisms on human gut health and disease is still largely unexplored. Blastocystis spp. commonly colonize the gut, but its clinical significance and ecological role are currently unsettled. We have developed a high-sensitivity bioinformatic pipeline to detect Blastocystis subtypes (STs) from shotgun metagenomics, and applied it to 12 large data sets, comprising 1689 subjects of different geographic origin, disease status and lifestyle. We confirmed and extended previous observations on the high prevalence the microrganism in the population (14...
August 22, 2017: ISME Journal
https://www.readbyqxmd.com/read/28827587/a-prospective-analysis-of-mucosal-microbiome-metabonome-interactions-in-colorectal-cancer-using-a-combined-mas-1hnmr-and-metataxonomic-strategy
#13
James Kinross, Reza Mirnezami, James Alexander, Richard Brown, Alasdair Scott, Dieter Galea, Kirill Veselkov, Rob Goldin, Ara Darzi, Jeremy Nicholson, Julian R Marchesi
Colon cancer induces a state of mucosal dysbiosis with associated niche specific changes in the gut microbiota. However, the key metabolic functions of these bacteria remain unclear. We performed a prospective observational study in patients undergoing elective surgery for colon cancer without mechanical bowel preparation (n = 18). Using 16 S rRNA gene sequencing we demonstrated that microbiota ecology appears to be cancer stage-specific and strongly associated with histological features of poor prognosis...
August 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28826742/a-comprehensive-review-and-update-on-crohn-s-disease
#14
Mahesh Gajendran, Priyadarshini Loganathan, Anthony P Catinella, Jana G Hashash
The term inflammatory bowel disease (IBD) refers principally to two major categories of chronic relapsing inflammatory intestinal disorders: Crohn's disease (CD) and ulcerative colitis (UC). In the United States, it is currently estimated that about 1.5 million people suffer from IBD, causing considerable suffering, mortality and economic loss every year. Yet the cause of IBD is unknown, and until we understand more, prevention or cure will not be possible. There is a lot of variation in the incidence and prevalence of CD based on geographic region, environment, immigrant population, and ethnic groups...
August 18, 2017: Disease-a-month: DM
https://www.readbyqxmd.com/read/28808878/role-of-intestinal-microbiome-in-american-ginseng-mediated-colon-cancer-protection-in-high-fat-diet-fed-aom-dss-mice
#15
C-Z Wang, W-H Huang, C-F Zhang, J-Y Wan, Y Wang, C Yu, S Williams, T-C He, W Du, M W Musch, E B Chang, C-S Yuan
OBJECTIVE: Chronic intestinal inflammation is a risk factor for colorectal cancer (CRC) initiation and development. Diets that are rich in Western style fats have been shown to promote CRC. This study was conducted to investigate the role of intestinal microbiome in American ginseng-mediated CRC chemoprevention in a mouse model. The population and diversity of enteric microbiome were evaluated after the ginseng treatment. METHODS: Using an azoxymethane (AOM)/dextran sulfate sodium (DSS)-induced gut inflammation and tumorigenesis mouse model, the effects of oral American ginseng on high fat diet-associated enteric pathology were determined...
August 14, 2017: Clinical & Translational Oncology
https://www.readbyqxmd.com/read/28807841/racial-disparity-in-gastrointestinal-cancer-risk
#16
REVIEW
Hassan Ashktorab, Sonia S Kupfer, Hassan Brim, John M Carethers
Cancer from the gastrointestinal tract and its associated excretory organs will occur in more than 300,000 Americans in 2017, with colorectal cancer responsible for >40% of that burden; there will be more than 150,000 deaths from this group of cancers in the same time period. Disparities among subgroups related to the incidence and mortality of these cancers exist. The epidemiology and risk factors associated with each cancer bear out differences for racial groups in the United States. Esophageal adenocarcinoma is more frequent in non-Hispanic whites, whereas esophageal squamous cell carcinoma with risk factors of tobacco and alcohol is more frequent among blacks...
August 12, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28801429/multicentric-randomised-study-of-helicobacter-pylori-eradication-and-pepsinogen-testing-for-prevention-of-gastric-cancer-mortality-the-gistar-study
#17
Marcis Leja, Jin Young Park, Raul Murillo, Inta Liepniece-Karele, Sergejs Isajevs, Ilze Kikuste, Dace Rudzite, Petra Krike, Sergei Parshutin, Inese Polaka, Arnis Kirsners, Daiga Santare, Valdis Folkmanis, Ilva Daugule, Martyn Plummer, Rolando Herrero
INTRODUCTION: Population-based eradication of Helicobacter pylori has been suggested to be cost-effective and is recommended by international guidelines. However, the potential adverse effects of widespread antibiotic use that this would entail have not been sufficiently studied. An alternative way to decrease gastric cancer mortality is by non-invasive search for precancerous lesions, in particular gastric atrophy; pepsinogen tests are the best currently available alternative. The primary objective of GISTAR is to determine whether H pylori eradication combined with pepsinogen testing reduces mortality from gastric cancer among 40-64-year-old individuals...
August 11, 2017: BMJ Open
https://www.readbyqxmd.com/read/28797931/changes-in-the-gut-microbial-communities-following-addition-of-walnuts-to-the-diet
#18
Lauri O Byerley, Derrick Samuelson, Eugene Blanchard, Meng Luo, Brittany N Lorenzen, Shelia Banks, Monica A Ponder, David A Welsh, Christopher M Taylor
Walnuts are rich in omega-3 fatty acids, phytochemicals and antioxidants making them unique compared to other foods. Consuming walnuts has been associated with health benefits including a reduced risk of heart disease and cancer. Dysbiosis of the gut microbiome has been linked to several chronic diseases. One potential mechanism by which walnuts may exert their health benefit is through modifying the gut microbiome. This study identified the changes in the gut microbial communities that occur following the inclusion of walnuts in the diet...
July 9, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28797714/profiling-the-urinary-microbiome-in-men-with-positive-versus-negative-biopsies-for-prostate-cancer
#19
Eva Shrestha, James R White, Shu-Han Yu, Ibrahim Kulac, Onur Ertunc, Angelo M De Marzo, Srinivasan Yegnasubramanian, Leslie A Mangold, Alan W Partin, Karen S Sfanos
PURPOSE: Studies demonstrating bacterial DNA and cultivable bacteria in urine samples have challenged the clinical dogma that urine is sterile. Furthermore, studies now indicate that dysbiosis of the urinary microbiome is associated with pathological conditions. We propose that the urinary microbiome may influence chronic inflammation observed in the prostate, leading to prostate cancer development and progression. We therefore aimed to profile the urinary microbiome in men with positive versus negative biopsies for prostate cancer...
August 7, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28783896/liver-fluke-associated-biliary-tract-cancer
#20
REVIEW
Piyapan Prueksapanich, Panida Piyachaturawat, Prapimphan Aumpansub, Wiriyaporn Ridtitid, Roongruedee Chaiteerakij, Rungsun Rerknimitr
Cholangiocarcinoma (CCA) is an aggressive cancer arising from epithelial cells of the bile duct. Most patients with CCA have an unresectable tumor at the time of diagnosis. In Western countries, the risk of CCA increases in patients with primary sclerosing cholangitis, whereas liver fluke infection appears to be the major risk factor for CCA in Asian countries. A diagnosis of liver fluke infection often relies on stool samples, including microscopic examination, polymerase chain reaction-based assays, and fluke antigen detection...
August 9, 2017: Gut and Liver
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