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CRC AND MICROBIOTA

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https://www.readbyqxmd.com/read/29914865/a-simple-and-novel-fecal-biomarker-for-colorectal-cancer-ratio-of-fusobacterium-nucleatum-to-probiotics-populations-based-on-their-antagonistic-effect
#1
Songhe Guo, Linfang Li, Banglao Xu, Manghui Li, Qiuyao Zeng, Han Xiao, Ying Xue, Yixian Wu, Yidan Wang, Wanli Liu, Ge Zhang
BACKGROUND: Gut microbial dysbiosis contributes to the development of colorectal cancer (CRC). We evaluated the utility of fecal bacterial biomarker candidates identified by our 16S rDNA sequencing analysis for CRC diagnosis. METHODS: We measured the relative abundance of Fusobacterium nucleatum ( Fn ), Faecalibacterium prausnitzii ( Fp ), Bifidobacterium ( Bb ), and Lactobacillus ( Lb ) by quantitative PCR in fecal samples from 2 cohorts of 903 individuals. We evaluated and validated the diagnostic performance of these microbial ratios and investigated the antagonistic effect of Fn against 3 different indicator stains...
June 18, 2018: Clinical Chemistry
https://www.readbyqxmd.com/read/29910850/role-of-gut-microbiota-in-the-pathogenesis-of-colorectal-cancer-a-review-article
#2
REVIEW
Somayeh Jahani-Sherafat, Masoud Alebouyeh, Sharareh Moghim, Hamed Ahmadi Amoli, Hajieh Ghasemian-Safaei
Colorectal cancer (CRC) is one of the most frequently diagnosed cancers worldwide. Lifestyle is identified as one of the most important risk factors for CRC, especially in sporadic colorectal cancer. The natural composition of the gut microbiota changes rapidly during the first decade of life. Maintaining homeostasis in the gut is essential as structural and metabolic functions of the commensal microbiota inhibit gut colonization of pathogens. Dysbiosis, imbalance in function or structure of gut microbiota, has been associated with a variety of diseases, such as colorectal cancer...
2018: Gastroenterology and Hepatology From Bed to Bench
https://www.readbyqxmd.com/read/29904241/microbial-markers-in-colorectal-cancer-detection-and-or-prognosis
#3
REVIEW
Romain Villéger, Amélie Lopès, Julie Veziant, Johan Gagnière, Nicolas Barnich, Elisabeth Billard, Delphine Boucher, Mathilde Bonnet
Colorectal cancer (CRC) is the second leading cause of cancer worldwide. CRC is still associated with a poor prognosis among patients with advanced disease. On the contrary, due to its slow progression from detectable precancerous lesions, the prognosis for patients with early stages of CRC is encouraging. While most robust methods are invasive and costly, actual patient-friendly screening methods for CRC suffer of lack of sensitivity and specificity. Therefore, the development of sensitive, non-invasive and cost-effective methods for CRC detection and prognosis are necessary for increasing the chances of a cure...
June 14, 2018: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/29887882/colonic-mucosal-microbiota-in-colorectal-cancer-a-single-center-metagenomic-study-in-saudi-arabia
#4
Ahmed O Alomair, Ibrahim Masoodi, Essam J Alyamani, Abed A Allehibi, Adel N Qutub, Khalid N Alsayari, Musaad A Altammami, Ali S Alshanqeeti
Background and Aim: Because genetic and geographic variations in intestinal microbiota are known to exist, the focus of this study was to establish an estimation of microbiota in colorectal cancer (CRC) patients in Saudi Arabia by means of metagenomic studies. Methods: From July 2010 to November 2012, colorectal cancer patients attending our hospital were enrolled for the metagenomic studies. All underwent clinical, endoscopic, and histological assessment. Mucosal microbiota samples were collected from each patient by jet-flushing colonic mucosa with distilled water at unified segments of the colon, followed by aspiration, during colonoscopy...
2018: Gastroenterology Research and Practice
https://www.readbyqxmd.com/read/29848266/the-role-of-diet-related-short-chain-fatty-acids-in-colorectal-cancer-metabolism-and-survival-prevention-and-therapeutic-implications
#5
Sara Daniela Gomes, Claudia Suellen Oliveira, Joao Azevedo-Silva, Marta Casanova, Judite Barreto, Helena Pereira, Susana Chaves, Ligia Rodrigues, Margarida Casal, Manuela Corte-Real, Fatima Baltazar, Ana Preto
Colorectal cancer (CRC) is a major cause of cancer-related death worldwide. CRC increased risk has been associated with alterations in the intestinal microbiota, with decreased production of short chain fatty acids (SCFAs). SCFAs produced in the human colon are the major products of bacterial fermentation of undigested dietary fiber and starch. While colonocytes use the three major SCFAs, namely acetate, propionate and butyrate, as energy sources, transformed CRC cells primarily undergo aerobic glycolysis. Compared to normal colonocytes, CRC cells exhibit increased sensitivity to SCFAs, thus indicating they play an important role in cell homeostasis...
May 29, 2018: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29795787/interaction-between-host-micrornas-and-the-gut-microbiota-in-colorectal-cancer
#6
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/29770393/consumption-of-pomegranate-decreases-plasma-lipopolysaccharide-binding-protein-levels-a-marker-of-metabolic-endotoxemia-in-patients-with-newly-diagnosed-colorectal-cancer-a-randomized-controlled-clinical-trial
#7
A González-Sarrías, M A Núñez-Sánchez, M A Ávila-Gálvez, T Monedero-Saiz, F J Rodríguez-Gil, Francisco Martínez-Díaz, M V Selma, J C Espín
Gut microbiota dysbiosis alters the intestinal barrier function, increases plasma lipopolysaccharide (LPS) levels, which promotes endotoxemia, and contributes to the onset and development of colorectal cancer (CRC). We report here for the first time the reduction of plasma LPS-binding protein (LBP) levels, a marker of endotoxemia, after pomegranate consumption in newly diagnosed CRC patients.
May 17, 2018: Food & Function
https://www.readbyqxmd.com/read/29760804/association-between-fusobacterium-nucleatum-and-colorectal-cancer-progress-and-future-directions
#8
REVIEW
Sheng Zhang, Sanjun Cai, Yanlei Ma
The initiation and progression of colorectal cancer (CRC) involves genetic and epigenetic alterations influenced by dietary and environmental factors. Increasing evidence has linked the intestinal microbiota and colorectal cancer. More recently, Fusobacterium nucleatum (Fn), an opportunistic commensal anaerobe in the oral cavity, has been associated with CRC. Several research teams have reported an overabundance of Fn in human CRC and have elucidated the possible mechanisms by which Fn is involved in colorectal carcinogenesis in vitro and in mouse models...
2018: Journal of Cancer
https://www.readbyqxmd.com/read/29750437/green-tea-liquid-consumption-alters-the-human-intestinal-and-oral-microbiome
#9
Xiaojie Yuan, Yong Long, Zhaohua Ji, Jie Gao, Ting Fu, Min Yan, Lei Zhang, Haixia Su, Weilu Zhang, Xiaohui Wen, Zhongshu Pu, Hui Chen, Yufei Wang, Xu Gu, Binyuan Yan, Kanakaraju Kaliannan, Zhongjun Shao
SCOPE: GTPs exerts anti-CRC activity. The intestinal microbiota and intestinal colonization by bacteria of oral origin has been implicated in colorectal carcinogenesis. GT modulates the composition of mouse gut microbiota harmonious with anticancer activity. Therefore, we investigated the effect of GTL consumption on the gut and oral microbiome in healthy volunteers (n = 12). METHODS AND RESULTS: 16S sequencing and PICRUSt analysis of both fecal and saliva samples (collected before intervention, after 2 weeks of GTL (400 ml/day) and after a washout period of one week) in healthy volunteers showed changes in microbial diversity and core microbiota and difference in clear classification (PLS-DA)...
May 11, 2018: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/29729257/association-between-bacteremia-from-specific-microbes-and-subsequent-diagnosis-of-colorectal-cancer
#10
Thomas N Y Kwong, Xiansong Wang, Geicho Nakatsu, Tai Cheong Chow, Timothy Tipoe, Rudin Z W Dai, Kelvin K K Tsoi, Martin C S Wong, Gary Tse, Matthew T V Chan, Francis K L Chan, Siew C Ng, Justin C Y Wu, William K K Wu, Jun Yu, Joseph J Y Sung, Sunny H Wong
BACKGROUND & AIMS: Colorectal cancer (CRC) development has been associated with increased proportions of Bacteroides fragilis and certain Streptococcus, Fusobacterium, and Peptostreptococcus species in the intestinal microbiota. We investigated associations between bacteremia from specific intestinal microbes and occurrence of CRC. METHODS: We performed a retrospective study, collecting data from13,096 adult patients (exposed group) in Hong Kong hospitalized with bacteremia (identified by blood culture test), without a previous diagnosis of cancer, from January 1, 2006 through December 31, 2015...
May 2, 2018: Gastroenterology
https://www.readbyqxmd.com/read/29720905/the-role-of-the-gut-microbiome-in-colorectal-cancer
#11
REVIEW
Grace Y Chen
There is increasing evidence that the gut microbiome, which consists of trillions of microbes representing over 1,000 species of bacteria with over 3 million genes, significantly impacts intestinal health and disease. The gut microbiota not only is capable of promoting intestinal homeostasis and antitumor responses but can also contribute to chronic dysregulated inflammation as well as have genotoxic effects that lead to carcinogenesis. Whether the gut microbiota maintains health or promotes colon cancer may ultimately depend on the composition of the gut microbiome and the balance within the microbial community of protective and detrimental bacterial populations...
May 2018: Clinics in Colon and Rectal Surgery
https://www.readbyqxmd.com/read/29713943/the-association-of-diet-gut-microbiota-and-colorectal-cancer-what-we-eat-may-imply-what-we-get
#12
REVIEW
Jia Yang, Jun Yu
Despite the success of colonoscopy screening and recent advances in cancer treatment, colorectal cancer (CRC) still remains one of the most commonly diagnosed and deadly cancers, with a significantly increased incidence in developing countries where people are adapting to Western lifestyle. Diet has an important impact on risk of CRC. Multiple epidemiological studies have suggested that excessive animal protein and fat intake, especially red meat and processed meat, could increase the risk of developing CRC while fiber could protect against colorectal tumorigenesis...
May 2018: Protein & Cell
https://www.readbyqxmd.com/read/29670137/a-systems-biology-approach-to-predict-and-characterize-human-gut-microbial-metabolites-in-colorectal-cancer
#13
QuanQiu Wang, Li Li, Rong Xu
Colorectal cancer (CRC) is the second leading cause of cancer-related deaths. It is estimated that about half the cases of CRC occurring today are preventable. Recent studies showed that human gut microbiota and their collective metabolic outputs play important roles in CRC. However, the mechanisms by which human gut microbial metabolites interact with host genetics in contributing CRC remain largely unknown. We hypothesize that computational approaches that integrate and analyze vast amounts of publicly available biomedical data have great potential in better understanding how human gut microbial metabolites are mechanistically involved in CRC...
April 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29657127/the-intestinal-microbiota-in-colorectal-cancer
#14
REVIEW
Herbert Tilg, Timon E Adolph, Romana R Gerner, Alexander R Moschen
Experimental evidence from the past years highlights a key role for the intestinal microbiota in inflammatory and malignant gastrointestinal diseases. Diet exhibits a strong impact on microbial composition and provides risk for developing colorectal carcinoma (CRC). Large metagenomic studies in human CRC associated microbiome signatures with the colorectal adenoma-carcinoma sequence, suggesting a fundamental role of the intestinal microbiota in the evolution of gastrointestinal malignancy. Basic science established a critical function for the intestinal microbiota in promoting tumorigenesis...
March 19, 2018: Cancer Cell
https://www.readbyqxmd.com/read/29650970/crosstalk-between-gut-microbiota-and-sirtuin-3-in-colonic-inflammation-and-tumorigenesis
#15
Yong Zhang, Xiao-Lan Wang, Min Zhou, Chao Kang, He-Dong Lang, Meng-Ting Chen, Suo-Cheng Hui, Bin Wang, Man-Tian Mi
Colorectal cancer (CRC) is a disease involving a variety of genetic and environmental factors. Sirtuin-3 (Sirt3) is expressed at a low level in cancer tissues of CRC, but it is unclear how Sirt3 modulates colonic tumorigenesis. In this study, we found that gut microbiota play a central role in the resistance to CRC tumor formation in wild-type (WT) mice through APC (Adenomatous Polyposis Coli)-mutant mouse microbiota transfer via Wnt signaling. We also found that Sirt3-deficient mice were hypersusceptible to colonic inflammation and tumor development through altered intestinal integrity and p38 signaling, respectively...
April 13, 2018: Experimental & Molecular Medicine
https://www.readbyqxmd.com/read/29642940/multi-cohort-analysis-of-colorectal-cancer-metagenome-identified-altered-bacteria-across-populations-and-universal-bacterial-markers
#16
Zhenwei Dai, Olabisi Oluwabukola Coker, Geicho Nakatsu, William K K Wu, Liuyang Zhao, Zigui Chen, Francis K L Chan, Karsten Kristiansen, Joseph J Y Sung, Sunny Hei Wong, Jun Yu
BACKGROUND: Alterations of gut microbiota are associated with colorectal cancer (CRC) in different populations and several bacterial species were found to contribute to the tumorigenesis. The potential use of gut microbes as markers for early diagnosis has also been reported. However, cohort specific noises may distort the structure of microbial dysbiosis in CRC and lead to inconsistent results among studies. In this regard, our study targeted at exploring changes in gut microbiota that are universal across populations at species level...
April 11, 2018: Microbiome
https://www.readbyqxmd.com/read/29589305/molecular-analysis-of-the-microbiome-in-colorectal-cancer
#17
Fiona Clegg, Susan H Berry, Richard Hansen, Georgina L Hold
The human gut microbiota plays a major role in the development of colorectal cancer (CRC). Many studies have attempted to define links between microbiota residents, their function and disease development. We now have incredible molecular tools to allow us to study the gut microbiome however in order to make best use of these sophisticated approaches we need to ensure that samples are collected and processed using standardized and reproducible protocols. Here we provide an overview of molecular analysis methods and describe protocols for collecting and processing clinical samples for subsequent microbiome analysis...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29573336/impact-of-klebsiella-pneumoniae-in-lower-gastrointestinal-tract-diseases
#18
REVIEW
Christina Parvinder Kaur, Jamuna Vadivelu, Samudi Chandramathi
The 2016 Global Burden of Disease report by WHO revealed that diseases of the gastrointestinal tract (GIT) had one of the highest incidence rates worldwide. The plethora of factors that contribute to the development of GIT-related illnesses can be divided into genetic, environmental and lifestyle factors. Apart from that, the role that infectious agents play in the development of GIT diseases has piqued the interest of researchers worldwide. The human gut harbors approximately 1014 bacteria in it with increasing concentration toward the lower GIT...
March 24, 2018: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/29566903/the-gastrointestinal-microbiota-and-its-role-in-oncogenesis
#19
REVIEW
S Y Lam, J Yu, S H Wong, M P Peppelenbosch, G M Fuhler
Advances in research techniques have made it possible to map the microbial communities in the gastrointestinal (GI) tract, where the majority of bacteria in the human body reside. Disturbances in these communities are referred to as dysbiosis and have been associated with GI cancers. Although dysbiosis is observed in several GI malignancies, the specific role of these changes has not been understood to the extent of Helicobacter pylori (HP) in gastric cancer (GC). This review will address the bacterial communities along the GI tract, from the oral cavity to the anal canal, particularly focusing on bacterial dysbiosis and carcinogenesis...
December 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/29566186/meat-and-fiber-intake-and-interaction-with-pattern-recognition-receptors-tlr1-tlr2-tlr4-and-tlr10-in-relation-to-colorectal-cancer-in-a-danish-prospective-case-cohort-study
#20
Tine Iskov Kopp, Ulla Vogel, Anne Tjonneland, Vibeke Andersen
Background: Meat and dietary fiber are associated with increased and decreased risk of colorectal cancer (CRC), respectively. Toll-like receptors (TLRs) regulate the intestinal immune response in a complex interplay between the mucosal epithelium and the microbiota and may therefore be important modulators of diet-induced CRC together with other inflammatory mediators. Objective: Our aim was to investigate the association between functional TLR polymorphisms and risk of CRC and the interaction with dietary factors...
March 1, 2018: American Journal of Clinical Nutrition
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