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https://www.readbyqxmd.com/read/28729860/burn-injury-leads-to-increase-in-relative-abundance-of-opportunistic-pathogens-in-the-rat-gastrointestinal-microbiome
#1
Guangtao Huang, Kedai Sun, Supeng Yin, Bei Jiang, Yu Chen, Yali Gong, Yajie Chen, Zichen Yang, Jing Chen, Zhiqiang Yuan, Yizhi Peng
The gastrointestinal microbiome is crucial in human health. With greater than 10 times the cell count of an individual, the gastrointestinal microbiome provides many benefits to the host. It plays an important role in chronic illnesses and immune diseases and also following burns and trauma. This study aimed to determine whether severe burns affect the gastrointestinal microbiome during the early stages of after burn injury and the extent to which the microbiome is disturbed by such burns. We used a rat burn model to investigate any changes occurring in the microbiome after the burn trauma using 16S rRNA sequencing and downstream α-diversity, β-diversity, and taxonomy analysis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28729722/structure-based-discovery-of-small-molecule-inhibitors-of-cariogenic-virulence
#2
Qiong Zhang, Bhavitavya Nijampatnam, Zhang Hua, Thao Nguyen, Jing Zou, Xia Cai, Suzanne M Michalek, Sadanandan E Velu, Hui Wu
Streptococcus mutans employs a key virulence factor, three glucosyltransferase (GtfBCD) enzymes to establish cariogenic biofilms. Therefore, the inhibition of GtfBCD would provide anti-virulence therapeutics. Here a small molecule library of 500,000 small molecule compounds was screened in silico against the available crystal structure of the GtfC catalytic domain. Based on the predicted binding affinities and drug-like properties, small molecules were selected and evaluated for their ability to reduce S. mutans biofilms, as well as inhibit the activity of Gtfs...
July 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28727999/drug-ion-co-delivery-multi-functional-nanocarrier-to-regenerate-infected-tissue-defect
#3
Jung-Hwan Lee, Ahmed El-Fiqi, Nandin Mandakhbayar, Hae-Hyoung Lee, Hae-Won Kim
Regeneration of infected tissues is a globally challenging issue in medicine and dentistry. Common clinical therapies involving a complete removal of infected areas together with a treatment of antimicrobial drugs are often suboptimal. Biomaterials with anti-bacterial and pro-regenerative potential can offer a solution to this. Here we design a novel nanocarrier based on a mesoporous silicate-calcium glass by doping with Ag ions and simultaneously loading antimicrobial drugs onto mesopores. The nanocarriers could controllably release multiple ions (silver, calcium, and silicate) and drugs (tetracycline or chlorohexidine) to levels therapeutically relevant, and effectively internalize to human dental stem cells (∼90%) with excellent viability, ultimately stimulating odontogenic differentiation...
July 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/28718724/black-raspberries-and-their-anthocyanin-and-fiber-fractions-alter-the-composition-and-diversity-of-gut-microbiota-in-f-344-rats
#4
Pan Pan, Vy Lam, Nita Salzman, Yi-Wen Huang, Jianhua Yu, Jianying Zhang, Li-Shu Wang
Natural compounds can alter the diversity and composition of the gut microbiome, potentially benefiting our health. We previously demonstrated chemopreventive effects of black raspberries (BRBs) in colorectal cancer, which is associated with gut dysbiosis. To investigate the effects of whole BRBs and their fractions on gut microbiota, we fed F-344 rats a control diet, 5% BRBs, the BRB anthocyanin fraction, or the BRB residue fraction for 6 weeks. Feces were collected at baseline and at weeks 3 and 6, and bacterial sequence counts were analyzed...
July 18, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28717038/a-human-biofilm-disrupting-monoclonal-antibody-potentiates-antibiotic-efficacy-in-rodent-models-of-both-staphylococcus-aureus-and-acinetobacter-baumannii-infections
#5
Yan Q Xiong, Angeles Estellés, L Li, W Abdelhady, R Gonzales, Arnold S Bayer, Edgar Tenorio, Anton Leighton, Stefan Ryser, Lawrence M Kauvar
Many serious bacterial infections are antibiotic-refractory due to biofilm formation. A key structural component of biofilm is extracellular DNA which is stabilized by bacterial proteins, including those from the DNABII family. TRL1068 is a high affinity human monoclonal antibody against a DNABII epitope conserved across both gram-positive and gram-negative bacterial species. In the current study, the efficacy of TRL1068 for disruption of biofilm was demonstrated in vitro in the absence of antibiotics by scanning electron microscopy...
July 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28715789/quantification-of-idp-73152-a-novel-antibiotic-in-plasma-from-mice-rats-and-humans-using-an-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry-method-for-use-in-pharmacokinetic-studies
#6
Myongjae Lee, Dohee Kim, Jeongcheol Shin, Hee-Yeol Lee, Soobong Park, Hong-Sub Lee, Jae-Hoon Kang, Suk-Jae Chung
IDP-73152, a novel inhibitor of a bacterial peptide deformylase, was recently approved as a new, investigational drug in Korea for the clinical management of infections caused by Gram positive bacteria. The objective of this study was to develop/validate a simple and robust analytical method for the determination of IDP-73152 in plasma samples from rodents and humans, and to assess the feasibility of the assay for use in pharmacokinetic studies using animal models. Plasma samples were processed using a standard method for protein precipitation and an aliquot of the extract then injected onto an UHPLC-MS/MS system...
July 6, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28711712/ex-vivo-and-in-vivo-evaluation-of-microemulsion-based-transdermal-delivery-of-e-coli-specific-t4-bacteriophage-a-rationale-approach-to-treat-bacterial-infection
#7
Vaibhav Rastogi, Pragya Yadav, Anurag Verma, Jayanta K Pandit
This study is focused on the development and evaluation of transdermal delivery of E. coli-specific T4 bacteriophages both ex-vivo and in-vivo using microemulsion as delivery carrier in eradicating the infection caused by E. coli. Microemulsions were prepared by mixing selected oil, surfactants and aqueous phase containing bacteriophages. The formulations were subjected to physicochemical characterization, ex-vivo and in-vivo permeation, stability studies, histological and immunofluorescence examination. The colloidal system exhibits a uniform size distribution, of finite size (150-320nm)...
July 12, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28702016/burn-serum-increases-staphylococcus-aureus-biofilm-formation-via-oxidative-stress
#8
Supeng Yin, Bei Jiang, Guangtao Huang, Yali Gong, Bo You, Zichen Yang, Yu Chen, Jing Chen, Zhiqiang Yuan, Ming Li, Fuquan Hu, Yan Zhao, Yizhi Peng
Staphylococcus aureus is a common pathogen isolated from burn patients that can form biofilms on burn wounds and implanted deep vein catheters, which often leads to refractory infections or even biofilm-related sepsis. As biofilm formation is usually regulated by environmental conditions, we hypothesized that serum composition may be altered after burn injury, potentially affecting the ability of infecting bacteria to form biofilms. As predicted, we observed that serum from burn-injured rats increases biofilm formation by S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28694176/anxiogenic-effects-of-a-lactobacillus-inulin-and-the-synbiotic-on-healthy-juvenile-rats
#9
Camila Barrera-Bugueño, Ornella Realini, Jorge Escobar-Luna, Ramón Sotomayor-Zárate, Martin Gotteland, Marcela Julio-Pieper, Javier A Bravo
Gut microbiota interventions, including probiotic and prebiotic use can alter behavior in adult animals and healthy volunteers. However, little is known about their effects in younger individuals. To investigate this, male Sprague-Dawley rats (post-natal day 21, PND21) received Lactobacillus casei 54-2-33 (10(4)cfu/ml), inulin as prebiotic (16mg/ml), or both together (synbiotic) via drinking water for 14days. Control rats received water alone. Open field (OF) and elevated plus maze (EPM) behaviors were evaluated at PND34 and 35, respectively...
July 8, 2017: Neuroscience
https://www.readbyqxmd.com/read/28692320/the-probiotic-vsl-3-modulates-colonic-macrophages-inflammation-and-microflora-in-acute-trinitrobenzene-sulfonic-acid-colitis
#10
Raymond A Isidro, Abdon Lopez, Myrella L Cruz, Mayra I Gonzalez Torres, Gladys Chompre, Angel A Isidro, Caroline B Appleyard
The probiotic mixture VSL#3 attenuates colitis in patients with Inflammatory Bowel Disease (IBD) and in animal models of this condition, but the mechanisms involved are incompletely understood. VSL#3 alters macrophage morphology and secretory profile in vitro in a polarization-dependent manner. We examined the effect of VSL#3 on macrophages in acute trinitrobenzene sulfonic acid-induced colitis. Rats were randomized to normal, colitis, or colitis+VSL#3 groups. After sacrifice, the colons were evaluated for macroscopic and microscopic damage...
July 1, 2017: Journal of Histochemistry and Cytochemistry: Official Journal of the Histochemistry Society
https://www.readbyqxmd.com/read/28690172/managing-colonic-inflammation-associated-gut-derangements-by-systematically-optimised-and-targeted-ginger-extract-lactobacillus-acidophilus-loaded-pharmacobiotic-alginate-beads
#11
Parneet Kaur Deol, Pragyanshu Khare, Dhirendra Pratap Singh, Girish Soman, Mahendra Bishnoi, Kanthi Kiran Kondepudi, Indu Pal Kaur
Presently, we explore a cobiotic- ginger extract (GE; antioxidant-antiinflammatory) and Lactobacillus acidophilus (LAB, probiotic), for control of oxidative-stress, inflammation and dysbiosis mediated gut ailments. Since orally administered LAB looses viability while GE is a gastric irritant with poor ADME, we encapsulated them into calcium-alginate beads. Water-loving, viscolysing, and osmotic-building effects of polyethylene glycol were used to address poor probiotic encapsulation (≤10%) by effective sealing of numerous fine voids formed in the alginate gel...
July 6, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28687648/host-specificity-of-segmented-filamentous-bacteria-sfb-flagellins-affects-their-interaction-patterns-with-mouse-ileal-mucosal-proteins
#12
Huahai Chen, Yeshi Yin, Yanling Wang, Xin Wang, Charlie Xiang
Segmented filamentous bacteria (SFB) are known modulators of the mammalian immune system. Currently, the technology for investigating SFB culture in vitro is immature, and as a result, the mechanisms of SFB colonization and immune regulation are not yet fully elucidated. In this study, we investigated the gene diversity and host specificity of SFB flagellin genes. The flic1 and flic2 genes are relatively conserved, while the flic3 and flic4 genes are more variable, especially at the central and C-terminal regions...
July 7, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28682552/-effects-of-oral-interventions-on-carotid-artery-in-rats-with-chronic-periodontitis-for-the-detection-of-porphyromonas-gingivalis-and-the-expression-of-c-reactive-protein
#13
Ren Xiuyun, Wang Chong, Liu Xin, Li Hao, Ma Qianhui, Lin Mu, Shi Xuexue, Gao Jinhua
OBJECTIVE: This study aimed to establish a SD rat model of chronic periodontitis (CP) merged with hyperlipidemia (HL), perform periodontal treatment, detect the expression of partial C-reactive protein (CRP) and Porphyromonas gingivalis (P. gingivalis) in the rat carotid artery, and explore the relationship between periodontitis and atherosclerosis. METHODS: SD rats were randomly divided into three groups: control group (A), HL group (B), and CP+HL group (C). Group C rats were divided into natural process group (C1), scaling and root planning group (C2), and tooth extraction group (C3)...
April 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28671588/implications-of-neuroinvasive-bacterial-peptides-on-rodents-behaviour-and-neurotransmission
#14
Aneela Taj, Nusrat Jamil
Neuroinvasive microbes are capable of applying their influences on the autonomic nervous system (ANS) of the host followed by the involvement of central nervous system (CNS) by releasing extracellular metabolites that may cause alterations in the biochemical and neurophysiological environment. Consequently synaptic, neuroendocrine, peripheral immune, neuro-immune, and behavioural responses of the host facilitate the progression of infection. The present study was designed to extrapolate the effects of crude and purified extracellular peptides of neuropathogenic bacteria on behavioural responses and neurotransmission of Sprague Dawley (SD) models...
July 2, 2017: Pathogens
https://www.readbyqxmd.com/read/28671306/yeast-probiotic-coctile-strains-supplemented-babies-cerelac-induce-highly-potential-aflatoxins-detoxification-both-in-vitro-and-in-vivo-in-mother-and-babies-albino-rats
#15
Gamal M Hamad, Tarek H Taha, Elsayed E Hafez, Sobhy A El Sohaimy, Safwat H Ali
BACKGROUND: Aflatoxins (AFs) are a group of toxic, nephrototoxic, hepatotoxic and carcinogenic fungal metabolites. Thus, using of heat acid treated; Yeasts, Probiotic bacteria and their combination were used to remove AFB1, AFB2, AFG1, and AFG2 from human and animal food. RESULTS: The in vitro study revealed that the highest removal percentage of AF in PBS was recorded after 72 h with the yeast-probiotic coctile reached to 95.59%. Therefore, this coctile was added to Cerelac contaminated with AFB1, AFB2, AFG1, and AFG2 and the removal percentage were; 8...
July 3, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28669623/dual-antibiotherapy-of-tuberculosis-mediated-by-inhalable-locust-bean-gum-microparticles
#16
Susana Rodrigues, Ana D Alves, Joana S Cavaco, Jorge F Pontes, Filipa Guerreiro, Ana M Rosa da Costa, Francesca Buttini, Ana Grenha
Despite the existence of effective oral therapy, tuberculosis remains a deadly pathology, namely because of bacterial resistance and incompliance with treatments. Establishing alternative therapeutic approaches is urgently needed and inhalable therapy has a great potential in this regard. As pathogenic bacteria are hosted by alveolar macrophages, the co-localisation of antitubercular drugs and pathogens is thus potentiated by this strategy. This work proposes inhalable therapy of pulmonary tuberculosis mediated by a single locust bean gum (LBG) formulation of microparticles associating both isoniazid and rifabutin, complying with requisites of the World Health Organisation of combined therapy...
June 30, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28664144/acute-toxicity-and-genotoxicity-of-fermented-traditional-medicine-oyaksungi-san
#17
Hwayong Park, Youn-Hwan Hwang, Jin Yeul Ma
BACKGROUND: The traditional medicine oyaksungi-san (OY) has been prescribed in East Asia for hundreds of years for the treatment of stroke, paralysis, and ataxia. OY also has therapeutic effects on arthralgia, myalgia, and rheumatoid arthritis, and recent studies have shown its protective effects against apoptosis of hippocampal cells and its anti-inflammatory effects on the peripheral blood cells of patient with cerebral infarction. Many studies have explored the use of traditional medicine and herb materials in the development of safe, novel, and effective pharmaceuticals with fewer side effects...
June 2017: Integrative medicine research
https://www.readbyqxmd.com/read/28662142/effects-of-the-probiotic-bifidobacterium-animalis-subsp-lactis-on-the-non-surgical-treatment-of-periodontitis-a-histomorphometric-microtomographic-and-immunohistochemical-study-in-rats
#18
Milla S T Ricoldi, Flávia A C Furlaneto, Luiz F F Oliveira, Gustavo C Teixeira, Jéssica P Pischiotini, André L G Moreira, Edilson Ervolino, Maricê N de Oliveira, Cristina S B Bogsan, Sérgio L Salvador, Michel R Messora
Lactobacillus probiotics have been investigated in periodontitis. However, the effects of the genus Bifidobacterium on periodontitis are hardly known. This study evaluated the effects of the probiotic (PROB) Bifidobacterium animalis subsp. lactis (B. lactis) HN019 as an adjunct to scaling and root planing (SRP) in rats with experimental periodontitis (EP). At baseline, 32 rats were assigned to 4 groups: C (control), PROB, EP-SRP and EP-SRP-PROB. In groups EP-SRP and EP-SRP-PROB, the mandibular first molars of the animals received a ligature...
2017: PloS One
https://www.readbyqxmd.com/read/28661219/feeding-of-the-water-extract-from-ganoderma-lingzhi-to-rats-modulates-secondary-bile-acids-intestinal-microflora-mucins-and-propionate-important-to-colon-cancer
#19
Yongshou Yang, Dwi Eva Nirmagustina, Thanutchaporn Kumrungsee, Yukako Okazaki, Hiroyuki Tomotake, Norihisa Kato
Consumption of reishi mushroom has been reported to prevent colon carcinogenesis in rodents, although the underlying mechanisms remain unclear. To investigate this effect, rats were fed a high-fat diet supplemented with 5% water extract from either the reishi mushroom (Ganoderma lingzhi) (WGL) or the auto-digested reishi G. lingzhi (AWGL) for three weeks. Both extracts markedly reduced fecal secondary bile acids, such as lithocholic acid and deoxycholic acid (colon carcinogens). These extracts reduced the numbers of Clostridium coccoides and Clostridium leptum (secondary bile acids-producing bacteria) in a per g of cecal digesta...
June 29, 2017: Bioscience, Biotechnology, and Biochemistry
https://www.readbyqxmd.com/read/28660729/relative-variations-of-gut-microbiota-in-disordered-cholesterol-metabolism-caused-by-high-cholesterol-diet-and-host-genetics
#20
Tao Bo, Shanshan Shao, Dongming Wu, Shaona Niu, Jiajun Zhao, Ling Gao
Recent studies performed provide mechanistic insight into effects of the microbiota on cholesterol metabolism, but less focus was given to how cholesterol impacts the gut microbiota. In this study, ApoE(-/-) Sprague Dawley (SD) rats and their wild-type counterparts (n = 12) were, respectively, allocated for two dietary condition groups (normal chow and high-cholesterol diet). Total 16S rDNA of fecal samples were extracted and sequenced by high-throughput sequencing to determine differences in microbiome composition...
June 28, 2017: MicrobiologyOpen
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