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https://www.readbyqxmd.com/read/29222099/isolation-of-the-pinoresinol-mineralizing-pseudomonas-sp-sg-ms2-and-elucidation-of-its-catabolic-pathway
#1
Madhura Shettigar, Sahil Balotra, David Cahill, Andrew C Warden, Michael J Lacey, Hans-Peter E Kohler, Daniel Rentsch, John G Oakeshott, Gunjan Pandey
Pinoresinol is a dimer of two β-β' linked coniferyl alcohol molecules. It is both a plant defence molecule synthesized from the shikimic acid pathway and a representative of several β-β linked dimers produced during the microbial degradation of lignin in dead plant material. Until now little has been known about the bacterial catabolism of such dimers. Here we report the isolation of an efficient (+)-pinoresinol mineralizing Pseudomonas sp. strain SG-MS2 and its catabolic pathway. Degradation of pinoresinol in this strain is inducible and proceeds via a novel oxidative route which is in contrast to the previously reported reductive transformation by other bacteria...
December 8, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29221448/next-generation-sequencing-recent-applications-to-the-analysis-of-colorectal-cancer
#2
REVIEW
Filippo Del Vecchio, Valentina Mastroiaco, Antinisca Di Marco, Chiara Compagnoni, Daria Capece, Francesca Zazzeroni, Carlo Capalbo, Edoardo Alesse, Alessandra Tessitore
Since the establishment of the Sanger sequencing method, scientists around the world focused their efforts to progress in the field to produce the utmost technology. The introduction of next-generation sequencing (NGS) represents a revolutionary step and promises to lead to massive improvements in our understanding on the role of nucleic acids functions. Cancer research began to use this innovative and highly performing method, and interesting results started to appear in colorectal cancer (CRC) analysis. Several studies produced high-quality data in terms of mutation discovery, especially about actionable or less frequently mutated genes, epigenetics, transcriptomics...
December 8, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29221120/gut-microbial-profile-analysis-by-miseq-sequencing-of-pancreatic-carcinoma-patients-in-china
#3
Zhigang Ren, Jianwen Jiang, Haiyang Xie, Ang Li, Haifeng Lu, Shaoyan Xu, Lin Zhou, Hua Zhang, Guangying Cui, Xinhua Chen, Yuanxing Liu, Liming Wu, Nan Qin, Ranran Sun, Wei Wang, Lanjuan Li, Weilin Wang, Shusen Zheng
Pancreatic carcinoma (PC) is a lethal cancer. Gut microbiota is associated with some risk factors of PC, e.g. obesity and types II diabetes. However, the specific gut microbial profile in clinical PC in China has never been reported. This prospective study collected 85 PC and 57 matched healthy controls (HC) to analyze microbial characteristics by MiSeq sequencing. The results showed that gut microbial diversity was decreased in PC with an unique microbial profile, which partly attributed to its decrease of alpha diversity...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29217301/-gut-microbiota-what-impact-on-colorectal-carcinogenesis-and-treatment
#4
REVIEW
Antoine Bruneau, Minh-Tam Baylatry, Anne Christine Joly, Harry Sokol
The gut microbiota, composed of 1014 microorganisms, is now considered as a "hidden organ", regarding to its digestive, metabolic and immune functions, which are helpful to its host. For the last 15 years, advances in molecular biology have highlighted the association of gut microbiota dysbiosis with several diseases, including colorectal cancer. An increased abundance of some bacteria (including Fusobacterium nucleatum, Bacteroides fragilis, Escherichia coli) is associated with cancer, whereas others seem to be protective (Faecalibacterium prausnitzii)...
December 4, 2017: Bulletin du Cancer
https://www.readbyqxmd.com/read/29216329/characterization-of-fusobacterium-varium-fv113-g1-isolated-from-a-patient-with-ulcerative-colitis-based-on-complete-genome-sequence-and-transcriptome-analysis
#5
Tsuyoshi Sekizuka, Yumiko Ogasawara, Toshifumi Ohkusa, Makoto Kuroda
Fusobacterium spp. present in the oral and gut flora is carcinogenic and is associated with the risk of pancreatic and colorectal cancers. Fusobacterium spp. is also implicated in a broad spectrum of human pathologies, including Crohn's disease and ulcerative colitis (UC). Here we report the complete genome sequence of Fusobacterium varium Fv113-g1 (genome size, 3.96 Mb) isolated from a patient with UC. Comparative genome analyses totally suggested that Fv113-g1 is basically assigned as F. varium, in particular, it could be reclassified as notable F...
2017: PloS One
https://www.readbyqxmd.com/read/29214422/emu-oil-improves-clinical-indicators-of-disease-in-a-mouse-model-of-colitis-associated-colorectal-cancer
#6
Lauren C Chartier, Gordon S Howarth, Ian C Lawrance, Debbie Trinder, Scott J Barker, Suzanne Mashtoub
BACKGROUND/AIMS: Ulcerative colitis is a remitting and relapsing inflammatory bowel disorder. Current treatments are limited, and if poorly controlled, colitis may progress to colorectal cancer. Previously, Emu Oil protected the intestine in experimental models of gut damage. We aimed to determine whether Emu Oil could reduce the severity of chronic colitis and prevent the onset of neoplasia in a mouse model of colitis-associated colorectal cancer. METHODS: Female C57BL/6 mice were injected (day 0) with azoxymethane, followed by ad libitum access to three dextran sulfate sodium/water cycles (7 days of dextran sulfate sodium and 14 days of water)...
December 6, 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29214046/high-resolution-bacterial-16s-rrna-gene-profile-meta-analysis-and-biofilm-status-reveal-common-colorectal-cancer-consortia
#7
Julia L Drewes, James R White, Christine M Dejea, Payam Fathi, Thevambiga Iyadorai, Jamuna Vadivelu, April C Roslani, Elizabeth C Wick, Emmanuel F Mongodin, Mun Fai Loke, Kumar Thulasi, Han Ming Gan, Khean Lee Goh, Hoong Yin Chong, Sandip Kumar, Jane W Wanyiri, Cynthia L Sears
Colorectal cancer (CRC) remains the third most common cancer worldwide, with a growing incidence among young adults. Multiple studies have presented associations between the gut microbiome and CRC, suggesting a link with cancer risk. Although CRC microbiome studies continue to profile larger patient cohorts with increasingly economical and rapid DNA sequencing platforms, few common associations with CRC have been identified, in part due to limitations in taxonomic resolution and differences in analysis methodologies...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/29213996/gut-microbiota-epigenetic-modification-and-colorectal-cancer
#8
REVIEW
Sama Rezasoltani, Hamid Asadzadeh-Aghdaei, Ehsan Nazemalhosseini-Mojarad, Hossein Dabiri, Reza Ghanbari, Mohammad Reza Zali
Micro-organisms contain 90% of cells in human body and trillions foreign genes versus less than 30 thousand of their own. The human colon host various species of microorganisms, appraised at more than 1014 microbiota and contained of over a thousand species. Although each one's profile is separable, the relative abundance and distribution of bacterial species is the same between healthy ones, causing conservation of each person's overall health. Germline DNA mutations have been attributed to the less than 5% of CRC occurrence while more than 90% is associated with the epigenetic regulation...
April 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29210639/guanylate-cyclase-c-a-current-hot-target-from-physiology-to-pathology
#9
Jose Antonio Uranga, Marta Castro, Raquel Abalo
Guanylate cyclase C (GC-C) receptor is a transmembrane receptor, predominantly expressed in intestinal epithelial cells, that plays a main role in homeostasis and function of the digestive tract. The endogenous ligands for this receptor are the paracrine hormones uroguanylin and guanylin. The heat-stable enterotoxin, produced by enterotoxigenic bacteria, is also a natural ligand of this receptor. Upon ligand binding, GC-C receptors increase the second messenger cyclic guanosine monophosphate (cGMP) levels, regulating a variety of key cell-type specific processes such as chloride and bicarbonate secretion (which increases luminal fluid and intestinal motility), epithelial cell growth, regulation of intestinal barrier integrity and visceral sensitivity...
December 5, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/29209564/leukotriene-b4-receptor-1-mediated-host-response-shapes-gut-microbiota-and-controls-colon-tumor-progression
#10
Venkatakrishna R Jala, Paramahamsa Maturu, Sobha R Bodduluri, Elangovan Krishnan, Steven Mathis, Krishnaprasad Subbarao, Min Wang, Alfred B Jenson, Mary L Proctor, Eric C Rouchka, Rob Knight, Bodduluri Haribabu
Inflammation and infection are key promoters of colon cancer but the molecular interplay between these events is largely unknown. Mice deficient in leukotriene B4 receptor1 (BLT1) are protected in inflammatory disease models of arthritis, asthma and atherosclerosis. In this study, we show that BLT1-/- mice when bred onto a spontaneous tumor (ApcMin/+) model displayed an increase in the rate of intestinal tumor development and mortality. A paradoxical increase in inflammation in the tumors from the BLT1-/-ApcMin/+ mice is coincidental with defective host response to infection...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/29209524/heterogeneity-of-colon-cancer-from-bench-to-bedside
#11
REVIEW
Marco C Merlano, Cristina Granetto, Elena Fea, Vincenzo Ricci, Ornella Garrone
The large bowel shows biomolecular, anatomical and bacterial changes that proceed from the proximal to the distal tract. These changes account for the different behaviour of colon cancers arising from the diverse sides of the colon-rectum as well as for the sensitivity to the therapy, including immunotherapy. The gut microbiota plays an important role in the modulation of the immune response and differs between the right colon cancer and the left colorectal cancer. The qualitative and quantitative difference of the commensal bacteria between the right side and the left side induces epigenetic changes in the intestinal epithelial cells as well as in the resident immune population...
2017: ESMO Open
https://www.readbyqxmd.com/read/29209314/probiotic-strain-lactobacillus-casei-bl23-prevents-colitis-associated-colorectal-cancer
#12
Elsa Jacouton, Florian Chain, Harry Sokol, Philippe Langella, Luis G Bermúdez-Humarán
The gut microbiota plays a major role in intestinal health, and an imbalance in its composition can lead to chronic gut inflammation and a predisposition to developing colorectal cancer (CRC). Currently, the use of probiotic bacteria represents an emerging alternative to treat and prevent cancer. Moreover, consumption of these beneficial bacteria may also favorably modulate the composition of the gut microbiota, which has been described in several studies to play an important role in CRC carcinogenesis. In this context, the aim of this study was to assess the protective effect of oral treatment with Lactobacillus casei BL23, a probiotic strain well known for its anti-inflammatory and anticancer properties...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29203517/urogualylin-a-new-actor-in-the-energy-balance-movie
#13
Cintia Folgueira, Silvia Barja-Fernandez, Patricia Gonzalez-Saenz, Veronica Pena-Leon, Cecilia Castelao, Manuel Ruiz-Piñon, Felipe F Casanueva, Rubén Nogueiras, Luisa Maria Seoane
Uroguanylin (UGN) is a potential target in the fight against obesity. The mature protein is released after enzymatic cleavage from its natural precursor, pro-UGN. UGN is mostly produced in the gut, and its production is regulated by nutritional status. However, UGN is also produced in other tissues such as the kidneys. In the past, UGN has been widely studied as a natriuretic peptide owing to its involvement in several different pathologies such as heart failure, cancer, and gastrointestinal diseases. However, recent studies have suggested that UGN acts also as a regulator of body weight homeostasis because it modulates both food intake and energy expenditure...
December 4, 2017: Journal of Molecular Endocrinology
https://www.readbyqxmd.com/read/29198451/development-of-the-microbiota-in-infants-and-its-role-in-maturation-of-the-gut-mucosa-and-the-immune-system
#14
Cecilia Ximenez, Javier Torres
Dysbiosis of the gut microbiota has been associated with increasing numbers of diseases, including obesity, diabetes, inflammatory bowel disease, asthma, allergy, cancer and even neurologic or behavioral disorders. The other side of the coin is that a healthy microbiota leads to a healthy human development, to a mature and well trained immune system and to an efficient metabolic machinery. What we have learned in adults is in the end the result of a good start, a programmed, healthy development of the microbiota that must occur in the early years of life, probably even starting during the fetal stage...
November 30, 2017: Archives of Medical Research
https://www.readbyqxmd.com/read/29197615/interplay-between-the-lung-microbiome-and-lung-cancer
#15
Qixing Mao, Feng Jiang, Rong Yin, Jie Wang, Wenjie Xia, Gaochao Dong, Weidong Ma, Yao Yang, Lin Xu, Jianzhong Hu
The human microbiome confers benefits or disease susceptibility to the human body through multiple pathways. Disruption of the symbiotic balance of the human microbiome is commonly found in systematic diseases such as diabetes, obesity, and chronic gastric diseases. Emerging evidence has suggested that dysbiosis of the microbiota may also play vital roles in carcinogenesis at multiple levels, e.g., by affecting metabolic, inflammatory, or immune pathways. Although the impact of the gut microbiome on the digestive cancer has been widely explored, few studies have investigated the interplay between the microbiome and lung cancer...
November 29, 2017: Cancer Letters
https://www.readbyqxmd.com/read/29197069/polymethoxyflavones-prevent-benzo-a-pyrene-dextran-sodium-sulfate-induced-colorectal-carcinogenesis-through-modulating-xenobiotic-metabolism-and-ameliorate-autophagic-defect-in-icr-mice
#16
Jia-Ching Wu, Mei-Ling Tsai, Ching-Shu Lai, Chih-Yu Lo, Chi-Tang Ho, Ying-Jan Wang, Min-Hsiung Pan
Polycyclic aromatic hydrocarbons (PAHs) are widespread environmental carcinogenic pollutants and they have become an important issue in food contamination. Dietary intake of PAHs has been recognized as a major route of human exposure. However, the mechanisms behind dietary PAH-induced colorectal cancer (CRC) remain unclear. Several studies have shown that polymethoxyflavones (PMFs) are effective in preventing carcinogen-induced CRC or colitis. In this study, we investigated the preventive effect of PMFs on benzo[a]pyrene/dextran sulfate sodium (BaP/DSS)-induced colorectal tumorigenesis in ICR mice...
December 2, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29196621/remodelling-of-the-gut-microbiota-by-hyperactive-nlrp3-induces-regulatory-t-cells-to-maintain-homeostasis
#17
Xiaomin Yao, Chenhong Zhang, Yue Xing, Guang Xue, Qianpeng Zhang, Fengwei Pan, Guojun Wu, Yingxin Hu, Qiuhong Guo, Ailing Lu, Xiaoming Zhang, Rongbin Zhou, Zhigang Tian, Benhua Zeng, Hong Wei, Warren Strober, Liping Zhao, Guangxun Meng
Inflammasomes are involved in gut homeostasis and inflammatory pathologies, but the role of NLRP3 inflammasome in these processes is not well understood. Cryopyrin-associated periodic syndrome (CAPS) patients with NLRP3 mutations have autoinflammation in skin, joints, and eyes, but not in the intestine. Here we show that the intestines of CAPS model mice carrying an Nlrp3 R258W mutation maintain homeostasis in the gut. Additionally, such mice are strongly resistant to experimental colitis and colorectal cancer; this is mainly through a remodelled gut microbiota with enhanced anti-inflammatory capacity due to increased induction of regulatory T cells (Tregs)...
December 1, 2017: Nature Communications
https://www.readbyqxmd.com/read/29195678/the-interaction-between-smoking-alcohol-and-the-gut-microbiome
#18
REVIEW
Gabriele Capurso, Edith Lahner
The gastrointestinal microbiome is a complex echosystem that establishes a symbiotic, mutually beneficial relation with the host, being rather stable in health, but affected by age, drugs, diet, alcohol, and smoking. Alcohol and smoking contribute to changes in the stomach and affect H pylori-related disorders including the risk of gastric cancer. In the small intestine and in the colon alcohol causes depletion of bacteria with anti-inflammatory activity, eventually resulting in intestinal damage with "leaky gut"...
October 2017: Best Practice & Research. Clinical Gastroenterology
https://www.readbyqxmd.com/read/29188139/adipose-tissue-metabolism-and-cancer-progression-novel-insights-from-gut-microbiota
#19
REVIEW
Benedicte F Jordan, Florian Gourgue, Patrice D Cani
Purpose of Review: Obesity is strongly associated with the development of several types of cancers. This review aims to discuss the recent key mechanisms and actors underlying the link between adipose tissue metabolism and cancer, and the unequivocal common mechanisms connecting gut microbes to adipose tissue and eventually cancer development. Recent Findings: Complex interactions among systemic and tissue-specific pathways are suggested to link obesity and cancer, involving endocrine hormones, adipokines, fatty acids, inflammation, metabolic alterations, and hypoxia...
2017: Current Pathobiology Reports
https://www.readbyqxmd.com/read/29186641/gut-microbiota-and-colorectal-cancer-insights-into-pathogenesis-for-novel-therapeutic-strategies
#20
Yongbo Kang, Wei Pan, Yue Cai
Colorectal cancer (CRC), as a leading cause of cancer-related death, is triggered by the complex interplay of host genetics and environmental factors. Mounting evidence has shed light on the association of the gut microbiota dysbiosis with CRC. In CRC experimental models, certain gut microbial strains have been shown to inhibit or attenuate immune responses, indicating that specific species among intestinal commensal bacteria may play either a pathogenic or a protective role in the development of CRC. Oral intake of probiotics/prebiotics can therefore serve as a therapeutic approach for CRC treatment...
September 2017: Zeitschrift Für Gastroenterologie
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