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Intestinal flora

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https://www.readbyqxmd.com/read/28444216/dietary-metabolites-derived-from-gut-microbiota-critical-modulators-of-epigenetic-changes-in-mammals
#1
Mohd Iqbal Bhat, Rajeev Kapila
The mammalian gastrointestinal tract harbors trillions of commensal microorganisms, collectively known as the microbiota. The microbiota is a critical source of environmental stimuli and, thus, has a tremendous impact on the health of the host. The microbes within the microbiota regulate homeostasis within the gut, and any alteration in their composition can lead to disorders that include inflammatory bowel disease, allergy, autoimmune disease, diabetes, mental disorders, and cancer. Hence, restoration of the gut flora following changes or imbalance is imperative for the host...
April 22, 2017: Nutrition Reviews
https://www.readbyqxmd.com/read/28426403/pcr-denaturing-gradient-gel-electrophoresis-as-a-useful-method-to-identify-of-intestinal-bacteria-flora-in-haemaphysalis-flava-ticks
#2
Tian-Yin Cheng, Guo-Hua Liu
Ticks are blood-sucking ectoparasites of great medical and veterinary significance that can transmit bacteria, protozoa, fungi and viruses, causing a variety of human and animal diseases worldwide. In the present study, the intestinal bacterial flora associated with Haemaphysalis flava ticks in different developmental stages were analyzed using polymerase chain reaction (PCR) and denaturing gradient gel electrophoresis (DGGE). Eleven distinct DGGE bands were found using PCR-DGGE method. Sequences analyses indicated that they belonged to Bacillus cereus, Candidatus rickettsia, Erwinia sp...
June 1, 2017: Acta Parasitologica
https://www.readbyqxmd.com/read/28424690/bacillus-subtilis-improves-immunity-and-disease-resistance-in-rabbits
#3
Mengjiao Guo, Fahao Wu, Guangen Hao, Qin Qi, Rong Li, Ning Li, Liangmeng Wei, Tongjie Chai
Probiotics such as Lactobacillus and Bifidobacterium have been successfully used to promote growth and prevent diseases. Previous reports have demonstrated that Bacillus subtilis (B. subtilis) was a potential probiotic for animals. In this research, 180 B. subtilis were isolated from the soil, identified, and investigated in vitro. Furthermore, five B. subtilis were selected and mixed to investigate their effect on growth performance, immune response, intestine microbiota, and disease resistance in rabbits...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28422543/newer-insights-into-the-antidiarrheal-effects-of-acacia-catechu-willd-extract-in-guinea-pig
#4
Matteo Micucci, Roberto Gotti, Ivan Corazza, Gabriella Tocci, Alberto Chiarini, Marta De Giorgio, Luca Camarda, Maria Frosini, Carla Marzetti, Monica Cevenini, Roberta Budriesi
Acacia catechu Willd. is a plant diffused in India and other Asian countries, where it is used as a traditional medicine for the treatment of several ailments including diarrhea, one of the most common pathologies worldwide. In this study, we determined the chemical composition of Acacia catechu Willd. extract (AC) and evaluated its effect on spontaneous and induced contractility in isolated guinea pig ileum and proximal colon. Preliminary data about its antimicrobial effect against some pathogen agents versus some microbiota intestinal strain have been also reported...
April 19, 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/28420276/the-influence-of-maternal-vaginal-flora-on-the-intestinal-colonization-in-newborns-and-3-month-old-infants
#5
Iwona Gabriel, Anita Olejek, Krystyna Stencel-Gabriel, Miroslaw Wielgoś
The role of maternal vaginal bacteria on the colonization of neonatal gut is still matter of discussion. Our aim was estimate the role of maternal vaginal flora on the development of intestinal flora in neonates and 3- months-old infants. 79 maternal-neonatal pairs were included in the study. Vaginal swabs were taken before the rupture of membranes after admission to the delivery ward. First neonatal stool (meconium) and stool at 3-months-old infants were collected and cultured. All samples were subject to a microbiological analysis for Streptococcus, Staphylococcus, Bifidobacterium, Clostridium (including Cl...
April 18, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28413456/role-of-stem-cell-growth-factor-c-kit-in-the-pathogenesis-of-irritable-bowel-syndrome
#6
Yuna Chai, Yusheng Huang, Hongmei Tang, Xing Tu, Jianbo He, Ting Wang, Qingye Zhang, Fen Xiong, Detang Li, Zhenwen Qiu
Irritable bowel syndrome (IBS) is a functional bowel disease with a complicated etiopathogenesis, often characterized by gastrointestinal motility disorder and high visceral sensitivity. IBS is a comprehensive multi-systemic disorder, with the interaction of multiple factors, such as mental stress, intestinal function and flora, heredity, resulting in the disease. The existence of a common mechanism underlying the aforementioned factors is currently unknown. The lack of therapies that comprehensively address the disease symptoms, including abdominal pain and diarrhea, is a limitation of current IBS management...
April 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28412519/vitamin-d-signaling-in-intestinal-innate-immunity-and-homeostasis
#7
REVIEW
Vassil Dimitrov, John H White
The lumen of the gut hosts a plethora of microorganisms that participate in food assimilation, inactivation of harmful particles and in vitamin synthesis. On the other hand, enteric flora, a number of food antigens, and toxins are capable of triggering immune responses causing inflammation, which, when unresolved, may lead to chronic conditions such as inflammatory bowel disease (IBD). It is important, therefore, to contain the gut bacteria within the lumen, control microbial load and composition, as well as ensure adequate innate and adaptive immune responses to pathogenic threats...
April 12, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28392538/listeria-monocytogenes-meningitis-complicating-rotavirus-gastroenteritis-in-an-immunocompetent-child
#8
Takuma Ohnishi, Akiko Kawano, Mayumi Araki, Yuko Hamahata, Machiko Usui, Motoko Shimoyamada, Takuya Tamame, Masayuki Akashi, Seiji Sato
Listeria monocytogenes only occasionally causes bacterial meningitis in immunocompetent children. We report a case of L. monocytogenes meningitis associated with rotavirus gastroenteritis. The patient was a previously healthy 20-month-old girl who was admitted because of sustained fever and lethargy after suffering from gastroenteritis for 6 days. The patient's peripheral white blood cell count was 18,600/µL and the C-reactive protein level was 2.44 mg/dL. A stool sample tested positive for rotavirus antigen...
April 7, 2017: Keio Journal of Medicine
https://www.readbyqxmd.com/read/28387884/the-probiotics-in-dentistry-a-narrative-review
#9
A M Pujia, M Costacurta, L Fortunato, G Merra, S Cascapera, M Calvani, S Gratteri
The total number of microbes that colonize the human body is far greater than the number of cells that make it up. In recent years, it has been shown that bacteria play an essential role in the body; in fact, they are essential for the maturation of the intestine, the development and control of the immune system, the development of the brain, the metabolism of macronutrients, the synthesis of vitamins, and the energy balance. Bacteria play an essential role in defense of their territory against the entry of other bacteria that may be pathogenic to health...
March 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28367816/-contribution-of-autophagy-to-intestinal-homeostasis-and-pathology
#10
Coralie Trentesaux, Marie Fraudeau, Béatrice Romagnolo
The intestinal epithelial cells are crucial mediators of intestinal homeostasis. The intestinal epithelium is the largest of the body's mucosal surfaces exposed to the environment. Intestinal homeostasis is essentially based on the maintenance of intestinal epithelial cell integrity, a complex process involving a balance between the intestinal flora, the immune system and the energy expenses linked to metabolism. Autophagy appears to be central to these functions and allows the epithelium to adapt to its environment and different stress situations by participating in antibacterial defense, by controlling the composition of the intestinal flora and the immune response, and by participating in energy homeostasis...
March 2017: Médecine Sciences: M/S
https://www.readbyqxmd.com/read/28349964/probiotics-may-delay-the-progression-of-nonalcoholic-fatty-liver-disease-by-restoring-the-gut-microbiota-structure-and-improving-intestinal-endotoxemia
#11
Li Xue, Juntao He, Ning Gao, Xiaolan Lu, Ming Li, Xiaokang Wu, Zeshi Liu, Yaofeng Jin, Jiali Liu, Jiru Xu, Yan Geng
Gut-derived bacterial lipopolysaccharide (LPS) and subsequent hepatic toll-like receptor 4 (TLR4) activation have been recognized to be involved in the onset of diet-induced nonalcoholic fatty liver disease (NAFLD), but little is known about the variation of LPS and TLR4 during the progression of NAFLD. Probiotics were able to inhibit proliferation of harmful bacteria and improve gastrointestinal barrier function. However, it's unclear whether LPS/TLR4 is involved in the protection effect of probiotics on NAFLD...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28349910/good-bugs-vs-bad-bugs-evaluation-of-inhibitory-effect-of-selected-probiotics-against-enterococcus-faecalis
#12
Aarti A Bohora, Sharad R Kokate
INTRODUCTION: The main goal of endodontics is the prevention of apical periodontitis. This is due to the presence of persistent pathogenic microorganisms, such as Enterococcus faecalis, and its ability to directly cause acute and chronic inflammation in the periapical tissues. Lactobacillus has been shown to promote health in the intestines as well as to inhibit the growth of certain problematic oral bacteria. This study explores shifting the established paradigm of endodontic treatment, which has focused on eliminating all bacteria from the canal system and on elimination of the problematic bacteria through introducing probiotics...
April 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28339024/effects-of-berberine-on-a-rat-model-of-chronic-stress-and-depression-via-gastrointestinal-tract-pathology-and-gastrointestinal-flora-profile-assays
#13
Xiaohui Zhu, Yangdong Sun, Chenggang Zhang, Haifeng Liu
Chronic stress and depression are challenging conditions to treat, owing to their complexity and lack of clinically available and effective therapeutic agents. The aim of the present study was to investigate the mechanism by which berberine acts, by examining alterations to gastrointestinal tract histopathology and flora profile in a rat model, following the induction of stress. Research associating gastrointestinal flora and depression has increased, thus, the present study hypothesized that stress induces depression and changes in the gastrointestinal system...
May 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28337589/colonization-by-non-pathogenic-bacteria-alters-mrna-expression-of-cytochromes-p450-in-originally-germ-free-mice
#14
L Jourová, P Anzenbacher, B Lišková, Z Matušková, P Hermanová, T Hudcovic, H Kozáková, L Hrnčířová, E Anzenbacherová
Gut microbiota provides a wide range of beneficial function for the host and has an immense effect on the host's health state. It has also been shown that gut microbiome is often involved in the biotransformation of xenobiotics; however, the molecular mechanisms of the interaction between the gut bacteria and the metabolism of drugs by the host are still unclear. To investigate the effect of microbial colonization on messenger RNA (mRNA) expression of liver cytochromes P450 (CYPs), the main drug-metabolizing enzymes, we used germ-free (GF) mice, lacking the intestinal flora and mice monocolonized by non-pathogenic bacteria Lactobacillus plantarum (NIZO2877) or probiotic bacteria Escherichia coli Nissle 1917 compared to specific pathogen-free (SPF) mice...
March 23, 2017: Folia Microbiologica
https://www.readbyqxmd.com/read/28335502/catechins-and-their-therapeutic-benefits-to-inflammatory-bowel-disease
#15
REVIEW
Fei-Yan Fan, Li-Xuan Sang, Min Jiang
Catechins are natural polyphenolic phytochemicals that exist in food and medicinal plants, such as tea, legume and rubiaceae. An increasing number of studies have associated the intake of catechins-rich foods with the prevention and treatment of chronic diseases in humans, such as inflammatory bowel disease (IBD). Some studies have demonstrated that catechins could significantly inhibit the excessive oxidative stress through direct or indirect antioxidant effects and promote the activation of the antioxidative substances such as glutathione peroxidases (GPO) and glutathione (GSH), reducing the oxidative damages to the colon...
March 19, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28316999/does-the-gut-microbiota-influence-immunity-and-inflammation-in-multiple-sclerosis-pathophysiology
#16
REVIEW
Monika Adamczyk-Sowa, Aldona Medrek, Paulina Madej, Wirginia Michlicka, Pawel Dobrakowski
Aim. Evaluation of the impact of gut microflora on the pathophysiology of MS. Results. The etiopathogenesis of MS is not fully known. Gut microbiota may be of a great importance in the pathogenesis of MS, since recent findings suggest that substitutions of certain microbial population in the gut can lead to proinflammatory state, which can lead to MS in humans. In contrast, other commensal bacteria and their antigenic products may protect against inflammation within the central nervous system. The type of intestinal flora is affected by antibiotics, stress, or diet...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28314728/competitive-exclusion-reduces-transmission-and-excretion-of-extended-spectrum-%C3%AE-lactamase-producing-escherichia-coli-in-broilers
#17
Daniela Ceccarelli, Alieda van Essen-Zandbergen, Bregtje Smid, Kees T Veldman, Gert Jan Boender, Egil A J Fischer, Dik J Mevius, Jeanet A van der Goot
Extended-spectrum β-lactamases (ESBLs) and plasmid mediated AmpC β-lactamases (pAmpC) are enzymes able to hydrolyze a large variety of β-lactam antibiotics, including 3(rd) generation cephalosporins and monobactams. Broilers and broiler meat products can be highly contaminated with ESBL and pAmpC-producing Escherichia coli, also known as extended-spectrum cephalosporins (ESC)-resistant E. coli, and can be a source for human infections. As few data are available on interventions to reduce ESC-resistant E...
March 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28297790/-role-of-probiotics-in-treatment-of-nonalcoholic-fatty-liver-disease
#18
M Chen, M C Wang, R Ni, J Wang, L Wang, G N Wang, L Y Zhang
Nonalcoholic fatty liver disease (NAFLD) is one of the most common chronic liver diseases in China and manifests as simple fatty liver, non-alcoholic steatohepatitis, liver cirrhosis, and hepatocellular carcinoma. Studies have shown that intestinal flora can affect the development and progression of NAFLD via the "gut-liver axis" . Probiotics are active microorganisms with beneficial effects on the host, and more and more studies have found that probiotics play a positive role in improving NAFLD. They are cheaper, less harmful, and safer compared with antibiotics and surgery, and therefore, it may become a new method for the prevention and treatment of NAFLD...
January 20, 2017: Zhonghua Gan Zang Bing za Zhi, Zhonghua Ganzangbing Zazhi, Chinese Journal of Hepatology
https://www.readbyqxmd.com/read/28296584/intestinal-microbiota-and-relapse-after-hematopoietic-cell-transplantation
#19
Jonathan U Peled, Sean M Devlin, Anna Staffas, Melissa Lumish, Raya Khanin, Eric R Littmann, Lilan Ling, Satyajit Kosuri, Molly Maloy, John B Slingerland, Katya F Ahr, Kori A Porosnicu Rodriguez, Yusuke Shono, Ann E Slingerland, Melissa D Docampo, Anthony D Sung, Daniela Weber, Amin M Alousi, Boglarka Gyurkocza, Doris M Ponce, Juliet N Barker, Miguel-Angel Perales, Sergio A Giralt, Ying Taur, Eric G Pamer, Robert R Jenq, Marcel R M van den Brink
Purpose The major causes of mortality after allogeneic hematopoietic-cell transplantation (allo-HCT) are relapse, graft-versus-host disease (GVHD), and infection. We have reported previously that alterations in the intestinal flora are associated with GVHD, bacteremia, and reduced overall survival after allo-HCT. Because intestinal bacteria are potent modulators of systemic immune responses, including antitumor effects, we hypothesized that components of the intestinal flora could be associated with relapse after allo-HCT...
March 15, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28293920/the-intriguing-link-between-the-intestinal-microbiota-and-cardiovascular-disease
#20
Giuseppe Lippi, Elisa Danese, Camilla Mattiuzzi, Emmanuel J Favaloro
Human microbiota is a term conventionally used to define the normal flora of microbes living in all of us, most of which are resident in the gastrointestinal tract. Despite it having been known for some time that the vast majority of intestinal bacteria exert a strong influence on human life, recent technologic breakthroughs have made it possible to more accurately characterize the host microbial communities and explore their relationship with many human diseases. Notably, the evidence accumulated over the past 10 years suggests that a reasonable relationship can now be established between gut microbiota composition and the risk of cardiovascular disease...
March 14, 2017: Seminars in Thrombosis and Hemostasis
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