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https://www.readbyqxmd.com/read/28527946/the-microbiome-and-hepatobiliary-pancreatic-cancers
#1
Kosuke Mima, Shigeki Nakagawa, Hiroshi Sawayama, Takatsugu Ishimoto, Katsunori Imai, Masaaki Iwatsuki, Daisuke Hashimoto, Yoshifumi Baba, Yo-Ichi Yamashita, Naoya Yoshida, Akira Chikamoto, Hideo Baba
The human intestinal microbiome encompasses at least 100 trillion microorganisms that can influence host immunity and disease conditions, including cancer. Hepatobiliary and pancreatic cancers have been associated with poor prognosis owing to their high level of tumor invasiveness, distant metastasis, and resistance to conventional treatment options, such as chemotherapy. Accumulating evidence from animal models suggests that specific microbes and microbial dysbiosis can potentiate hepatobiliary-pancreatic tumor development by damaging DNA, activating oncogenic signaling pathways, and producing tumor-promoting metabolites...
May 17, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28522995/dysbiosis-of-intestinal-microbiota-and-decreased-antimicrobial-peptide-level-in-paneth-cells-during-hypertriglyceridemia-related-acute-necrotizing-pancreatitis-in-rats
#2
Chunlan Huang, Jing Chen, Jingjing Wang, Hui Zhou, Yingying Lu, Lihong Lou, Junyuan Zheng, Ling Tian, Xingpeng Wang, Zhongwei Cao, Yue Zeng
Hypertriglyceridemia (HTG) aggravates the course of acute pancreatitis (AP). Intestinal barrier dysfunction is implicated in the pathogenesis of AP during which dysbiosis of intestinal microbiota contributes to the dysfunction in intestinal barrier. However, few studies focus on the changes in intestine during HTG-related acute necrotizing pancreatitis (ANP). Here, we investigated the changes in intestinal microbiota and Paneth cell antimicrobial peptides (AMPs) in HTG-related ANP (HANP) in rats. Rats fed a high-fat diet to induce HTG and ANP was induced by retrograde injection of 3...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28522956/fecal-microbiota-transplantation-for-refractory-crohn-s-disease
#3
Seon Ho Bak, Hyun Ho Choi, Jinhee Lee, Mi Hee Kim, Youn Hee Lee, Jin Su Kim, Young-Seok Cho
Approximately one-third of patients with Crohn's disease do not respond to conventional treatments, and some experience significant adverse effects, such as serious infections and lymphoma, and many patients require surgery due to complications. Increasing evidence suggests that specific changes in the composition of gut microbiota, termed as dysbiosis, are a common feature in patients with inflammatory bowel disease (IBD). Dysbiosis can lead to activation of the mucosal immune system, resulting in chronic inflammation and the development of mucosal lesions...
April 2017: Intestinal Research
https://www.readbyqxmd.com/read/28513546/edible-plants-and-their-influence-on-the-gut-microbiome-and-acne
#4
REVIEW
Ashley K Clark, Kelly N Haas, Raja K Sivamani
Acne vulgaris affects most people at some point in their lives. Due to unclear etiology, likely with multiple factors, targeted and low-risk treatments have yet to be developed. In this review, we explore the multiple causes of acne and how plant-based foods and supplements can control these. The proposed causative factors include insulin resistance, sex hormone imbalances, inflammation and microbial dysbiosis. There is an emerging body of work on the human gut microbiome and how it mediates feedback between the foods we eat and our bodies...
May 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28512250/introduction-to-the-human-gut-microbiota
#5
REVIEW
Elizabeth Thursby, Nathalie Juge
The human gastrointestinal (GI) tract harbours a complex and dynamic population of microorganisms, the gut microbiota, which exert a marked influence on the host during homeostasis and disease. Multiple factors contribute to the establishment of the human gut microbiota during infancy. Diet is considered as one of the main drivers in shaping the gut microbiota across the life time. Intestinal bacteria play a crucial role in maintaining immune and metabolic homeostasis and protecting against pathogens. Altered gut bacterial composition (dysbiosis) has been associated with the pathogenesis of many inflammatory diseases and infections...
May 16, 2017: Biochemical Journal
https://www.readbyqxmd.com/read/28512033/bifidobacterium-cect-7765-modulates-early-stress-induced-immune-neuroendocrine-and-behavioral-alterations-in-mice
#6
A Moya-Pérez, A Perez-Villalba, A Benítez-Páez, I Campillo, Y Sanz
Emerging evidence suggests that there is a window of opportunity within the early developmental period, when microbiota-based interventions could play a major role in modulating the gut-brain axis and, thereby, in preventing mood disorders. This study aims at evaluating the effects and mode of action of Bifidobacterium pseudocatenulatum CECT 7765 in a murine model of chronic stress induced by maternal separation (MS). C57Bl/6J male breast-fed pups were divided into four groups, which were subjected or not to MS and supplemented with placebo or B...
May 13, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28506830/antibiotics-induced-gut-microbiota-dysbiosis-promotes-tumor-initiation-via-affecting-apc-th1-development-in-mice
#7
Chengming Xu, Banjun Ruan, Yinghao Jiang, Ting Xue, Zhenyu Wang, Huanyu Lu, Ming Wei, Shan Wang, Zicheng Ye, Dongsheng Zhai, Li Wang, Zifan Lu
Gut microbiota is critical for maintaining body immune homeostasis and thus affects tumor growth and therapeutic efficiency. Here, we investigated the link between microbiota and tumorgenesis in a mice model of subcutaneous melanoma cell transplantation, and explored the underlying mechanism. We found disruption of gut microbiota by pretreating mice with antibiotics promote tumor growth and remodeling the immune compartment within the primary tumor. Indeed, gut microbial dysbiosis reduced the infiltrated mature antigen-presenting cells of tumor, together with lower levels of co-stimulators, such as CD80, CD86 and MHCII, as well as defective Th1 cytokines, including IFNγ, TNFα, IL12p40, and IL12p35...
May 12, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28506730/-the-human-gut-microbiota-interactions-with-the-host-and-dysfunctions
#8
P Lepage
The human intestinal microbiota is composed of approximately 100,000 billion microorganisms with the average total number of different commensal bacterial species estimated at over 500 per individual. The human intestinal microbiota can be considered as an organ within another, which co-evolved with its host to achieve a symbiotic relationship leading to physiological homeostasis. The host provides an environment enriched in nutrients and the microbiota provides essential functions. Dysbiosis of the intestinal microbiota (changes in bacterial composition) has been associated with local dysfunctions of the gastrointestinal tract, such as inflammatory bowel disease or irritable bowel syndrome but also with obesity and metabolic diseases...
May 12, 2017: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/28504574/gut-dysbiosis-following-c-section-instigates-higher-colonisation-of-toxigenic-clostridium-perfringens-in-infants
#9
R Nagpal, H Tsuji, T Takahashi, K Nomoto, K Kawashima, S Nagata, Y Yamashiro
Herein we investigated the intestinal carriage of α-toxigenic and enterotoxigenic Clostridium perfringens during infancy, focusing on its association with other gut microbes and mode of delivery and feeding. Faecal samples from 89 healthy term infants were collected at age 7 days, 1 month, 3 months, 6 months and 3 years. C. perfringens was quantified by qPCR; other gut bacteria were quantified by reverse-transcription-qPCR. Alpha-toxigenic C. perfringens was detected in 3.4% infants at day 7 but was present in 35-40% infants at subsequent time-points, with counts ranging from 10(3)-10(7) cells/g faeces...
May 15, 2017: Beneficial Microbes
https://www.readbyqxmd.com/read/28501098/alterations-in-intestinal-microbiota-relate-to-intestinal-failure-associated-liver-disease-and-central-line-infections
#10
Panliang Wang, Ying Wang, Lina Lu, Weihui Yan, Yijing Tao, Kejun Zhou, Jie Jia, Wei Cai
BACKGROUND: The gut microbiota plays a vital role in modulating the metabolic and immune functions of the intestines. We aimed to analyze the dysbiosis of microbiota in infants with short bowel syndrome (SBS) with different complications. PROCEDURE: We included 26 fecal samples from 18 infants with SBS during parenteral nutrition. The samples were categorized into three groups: asymptomatic, parenteral nutrition-associated liver disease (PNALD), and central line-associated bloodstream infection (CLABSI)...
May 3, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28498296/interleukin-22-prevents-microbial-dysbiosis-and-promotes-intestinal-barrier-regeneration-following-acute-injury
#11
Adam M Hammer, Niya L Morris, Abigail R Cannon, Omair M Khan, Robin C Gagnon, Nellie V Movtchan, Ilse van Langeveld, Xiaoling Li, Bin Gao, Mashkoor A Choudhry
Intestine barrier disruption and bacterial translocation can contribute to sepsis and multiple organ failure- leading causes of mortality in burn-injured patients. Additionally, findings suggest ethanol (alcohol) intoxication at the time of injury worsens symptoms associated with burn injury. We have previously shown that interleukin-22 (IL-22) protects from intestinal leakiness and prevents overgrowth of Gram-negative bacteria following ethanol and burn injury, but how IL-22 mediates these effects has not been established...
May 11, 2017: Shock
https://www.readbyqxmd.com/read/28498157/compositional-changes-in-the-gut-mucus-microbiota-precede-the-onset-of-colitis-induced-inflammation
#12
Maria Glymenaki, Gurdeep Singh, Andrew Brass, Geoffrey Warhurst, Andrew J McBain, Kathryn J Else, Sheena M Cruickshank
BACKGROUND: Inflammatory bowel disease (IBD) is associated with an inappropriate immune response to the gut microbiota. Notably, patients with IBD reportedly have alterations in fecal microbiota. However, the colonic microbiota occupies both the gut lumen and the mucus covering the epithelium. Thus, information about mucus-resident microbiota fails to be conveyed in the routine microbiota analyses of stool samples. Further, studies analyzing microbiota in IBD have mainly focused on stool samples taken after onset of inflammation...
May 11, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28497760/the-intestinal-microbiome-and-paediatric-liver-disease
#13
REVIEW
Daniel H Leung, Dean Yimlamai
The intestinal microbiome has been the intense focus of recent study, but how the microbiota affects connected organs, such as the liver, has not been fully elucidated. The microbiome regulates intestinal permeability and helps to metabolise the human diet into small molecules, thus directly affecting liver health. Several studies have linked intestinal dysbiosis to the severity and progression of liver diseases, such as non-alcoholic fatty liver disease, non-alcoholic steatohepatitis, primary sclerosing cholangitis, total parenteral nutrition-associated liver disease, and cystic fibrosis-associated liver disease...
June 2017: Lancet. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28484429/protective-effect-of-carvacrol-against-gut-dysbiosis-and-clostridium-difficile-associated-disease-in-a-mouse-model
#14
Shankumar Mooyottu, Genevieve Flock, Abhinav Upadhyay, Indu Upadhyaya, Kendra Maas, Kumar Venkitanarayanan
This study investigated the effect of carvacrol (CR), a phytophenolic compound on antibiotic-associated gut dysbiosis and C. difficile infection in a mouse model. Five to six-week-old C57BL/6 mice were randomly divided into seven treatment groups (challenge and control) of eight mice each. Mice were fed with irradiated feed supplemented with CR (0, 0.05, and 0.1%); the challenge groups were made susceptible to C. difficile by orally administering an antibiotic cocktail in water and an intra-peritoneal injection of clindamycin...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28482009/the-microbiota-the-gut-and-the-brain-in-eating-and-alcohol-use-disorders-a-m%C3%A3-nage-%C3%A3-trois
#15
Jamie E Temko, Sofia Bouhlal, Mehdi Farokhnia, Mary R Lee, John F Cryan, Lorenzo Leggio
Aims: Accumulating evidence for the influence of the gut microbiota on the bidirectional communication along the gut-brain axis suggests a role of the gut microbiota in eating disorders (EDs) and alcohol and substance use disorders. The potential influence of altered gut microbiota (dysbiosis) on behaviors associated with such disorders may have implications for developing therapeutic interventions. Methods: A systematic review of preclinical and clinical studies evaluating the gut microbiota, EDs and alcohol and substance use disorders was conducted using MEDLINE, Embase and Web of Science databases with the objective being to examine the role of the gut microbiota in behavioral correlates of these disorders...
May 8, 2017: Alcohol and Alcoholism: International Journal of the Medical Council on Alcoholism
https://www.readbyqxmd.com/read/28475713/tcdd-influences-reservoir-of-antibiotic-resistance-genes-in-murine-gut-microbiome
#16
Robert D Stedtfeld, Tiffany M Stedtfeld, Kelly A Fader, Maggie R Williams, Prianca Bhaduri, John Quensen, Timothy R Zacharewski, James M Tiedje, Syed A Hashsham
Dysbiosis of the gut microbiome via antibiotics, changes in diet, and infection can select for bacterial groups that more frequently harbor antimicrobial resistance genes (ARGs) and mobile genetic elements (MGEs). However, the impact of environmental toxicants on the reservoir of ARGs in the gut microbiome has received less attention. 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is a potent aryl hydrocarbon receptor (AhR) agonist with multiple toxic health effects including immune dysfunction. The selective pressure of TCDD on the abundance of ARG and MGE harboring gut populations was examined using C57BL/6 mice exposed to 0-30 μg/kg TCDD for 28 and 92 days with the latter having a 30-day recovery period...
May 4, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28474475/what-happened-to-koch-s-postulates-in-diarrhea
#17
Shamima Sultana, Shafiqul A Sarker, Harald Brüssow
In 1890 Robert Koch has formulated postulates describing what criteria a parasite has to fulfill to qualify as an etiological agent for an infectious disease. Since then Koch's postulates have experienced reformulations by nearly every generation of microbiologists reflecting new discoveries changing the understanding of infectious diseases pathogenesis. The latest addition to this discussion is the role of the host commensal microbiota in turning infections into disease. After an overview of the historical developments of the postulates, we analyzed data on diarrhea etiology from Bangladesh with respect to Koch's postulates...
May 4, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28471941/basic-science-and-pathogenesis-of-ageing-with-hiv-potential-mechanisms-and-biomarkers
#18
Claire Lagathu, Andrea Cossarizza, Véronique Béréziat, Milena Nasi, Jacqueline Capeau, Marcello Pinti
: The increased prevalence of age-related comorbidities and mortality is worrisome in ageing HIV-infected patients. Here, we aim to analyse the different ageing mechanisms with regard to HIV infection. Ageing results from the time-dependent accumulation of random cellular damage. Epigenetic modifications and mitochondrial DNA haplogroups modulate ageing. In antiretroviral treatment-controlled patients, epigenetic clock appears to be advanced, and some haplogroups are associated with HIV infection severity. Telomere shortening is enhanced in HIV-infected patients because of HIV and some nucleoside analogue reverse transcriptase inhibitors...
June 1, 2017: AIDS
https://www.readbyqxmd.com/read/28469156/impaired-renal-function-and-dysbiosis-of-gut-microbiota-contribute-to-increased-trimethylamine-n-oxide-in-chronic-kidney-disease-patients
#19
Kai-Yu Xu, Geng-Hong Xia, Jun-Qi Lu, Mu-Xuan Chen, Xin Zhen, Shan Wang, Chao You, Jing Nie, Hong-Wei Zhou, Jia Yin
Chronic kidney disease (CKD) patients have an increased risk of cardiovascular diseases (CVDs). The present study aimed to investigate the gut microbiota and blood trimethylamine-N-oxide concentration (TMAO) in Chinese CKD patients and explore the underlying explanations through the animal experiment. The median plasma TMAO level was 30.33 μmol/L in the CKD patients, which was significantly higher than the 2.08 μmol/L concentration measured in the healthy controls. Next-generation sequence revealed obvious dysbiosis of the gut microbiome in CKD patients, with reduced bacterial diversity and biased community constitutions...
May 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28467926/a-specific-gut-microbiota-dysbiosis-of-type-2-diabetic-mice-induces-glp-1-resistance-through-an-enteric-no-dependent-and-gut-brain-axis-mechanism
#20
Estelle Grasset, Anthony Puel, Julie Charpentier, Xavier Collet, Jeffrey E Christensen, François Tercé, Rémy Burcelin
Glucagon-like peptide-1 (GLP-1)-based therapies control glycemia in type 2 diabetic (T2D) patients. However, in some patients the treatment must be discontinued, defining a state of GLP-1 resistance. In animal models we identified a specific set of ileum bacteria impairing the GLP-1-activated gut-brain axis for the control of insulin secretion and gastric emptying. Using prediction algorithms, we identified bacterial pathways related to amino acid metabolism and transport system modules associated to GLP-1 resistance...
May 2, 2017: Cell Metabolism
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