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https://www.readbyqxmd.com/read/29236389/fecal-short-chain-fatty-acids-at-different-time-points-after-ceftriaxone-administration-in-rats
#1
Yu V Holota, O O Holubenko, A M Ostapchuk, T M Serhiychuk, L V Zakordonets, G M Tolstanova
Short-chain fatty acids (SCFAs) are major products of the microbial fermentation of dietary fiber in the colon. Recent studies suggest that these products of microbial metabolism in the gut act as signaling molecules, influence host energy homeostasis and play major immunological roles. In the present study, defined the long-term effects of ceftriaxone administration on the fecal SCFAs concentration in Wistar rats. Ceftriaxone (300 mg/kg, i.m.) was administered daily for 14 days. Rats were euthanized in 1, 15 and 56 days after ceftriaxone withdrawal...
January 2017: Ukrainian Biochemical Journal
https://www.readbyqxmd.com/read/29236192/inhibitory-effect-of-streptococci-on-the-growth-of-m-catarrhalis-strains-and-the-diversity-of-putative-bacteriocin-like-gene-loci-in-the-genomes-of-s-pneumoniae-and-its-relatives
#2
L N Ikryannikova, M V Malakhova, G G Lominadze, I Yu Karpova, E S Kostryukova, N A Mayansky, A N Kruglov, E A Klimova, E S Lisitsina, E N Ilina, V M Govorun
S. pneumoniae is a facultative human pathogen causing a wide range of infections including the life-threatening pneumoniae or meningitis. It colonizes nasopharynx as well as its closest phylogenetic relatives S. pseudopneumoniae and S. mitis. Both the latter, despite the considerable morphological and phenotypic similarity with the pneumococcus, are considerably less pathogenic for humans and cause infections mainly in the immunocompromized hosts. In this work, we compared the inhibitory effect of S. pneumoniae and its relatives on the growth of Moraxella catarrhalis strains using the culture-based antagonistic test...
December 13, 2017: AMB Express
https://www.readbyqxmd.com/read/29236119/estimation-of-the-bioaccessibility-and-bioavailability-of-fe-mn-cu-and-zn-in-chinese-vegetables-using-the-in-vitro-digestion-caco-2-cell-model-the-influence-of-gut-microbiota
#3
Xiaolin Cai, Xiaochen Chen, Naiyi Yin, Huili Du, Guoxin Sun, Lihong Wang, Yudong Xu, Yuqing Chen, Yanshan Cui
The influence of the human gut microbiota on the bioaccessibility and bioavailability of trace elements in vegetables has barely been studied. An in vitro digestion model combining the physiologically based extraction test (PBET) and the Simulator of Human Intestinal Microbial Ecosystem (SHIME) was applied. Results showed that the gut microbiota increased the bioaccessibility of iron (Fe) in ten test vegetables by 1.3-1.8 times, but reduced the bioaccessibility of manganese (Mn), copper (Cu), and zinc (Zn) in vegetables in the colon phase by 3...
December 13, 2017: Food & Function
https://www.readbyqxmd.com/read/29236034/gastric-emptying-and-gastrointestinal-transit-compared-among-native-and-hydrolyzed-whey-and-casein-milk-proteins-in-an-aged-rat-model
#4
Julie E Dalziel, Wayne Young, Catherine M McKenzie, Neill W Haggarty, Nicole C Roy
Little is known about how milk proteins affect gastrointestinal (GI) transit, particularly for the elderly, in whom digestion has been observed to be slowed. We tested the hypothesis that GI transit is faster for whey than for casein and that this effect is accentuated with hydrolysates, similar to soy. Adult male rats (18 months old) were fed native whey or casein, hydrolyzed whey (WPH) or casein (CPH), hydrolyzed blend (HB; 60% whey:40% casein), or hydrolyzed soy for 14 days then treated with loperamide, prucalopride, or vehicle-control for 7 days...
December 13, 2017: Nutrients
https://www.readbyqxmd.com/read/29235922/dna-methylation-reprogramming-of-human-cancer-cells-by-expression-of-a-plant-5-methylcytosine-dna-glycosylase
#5
Teresa Morales-Ruiz, María Victoria García-Ortiz, Iván Devesa-Guerra, Laura Raya-Ruiz, Juan R Tejedor, Gustavo F Bayón, Marta I Sierra, Mario F Fraga, Rafael R Ariza, Teresa Roldán-Arjona
Patterns of DNA methylation, an important epigenetic modification involved in gene silencing and development, are disrupted in cancer cells. Understanding the functional significance of aberrant methylation in tumors remains challenging, due in part to the lack of suitable tools to actively modify methylation patterns. DNA demethylation caused by mammalian DNA methyltransferase inhibitors is transient and replication-dependent, whereas that induced by TET enzymes involves oxidized 5mC derivatives that perform poorly understood regulatory functions...
December 13, 2017: Epigenetics: Official Journal of the DNA Methylation Society
https://www.readbyqxmd.com/read/29235906/synthesis-and-molecular-modeling-of-new-benzimidazoles-as-glutathione-s-transferase-inhibitors-and-anticancer-agents
#6
Somaia S Abd El-Karim, Manal M Anwar, Eman R Zaki, Samia A Elseginy, Zienab M Nofal
AIM: Synthesis of novel glutathione S-transferases (GSTs) inhibitors constitutes a promising strategy in cancer treatment. Results/methodology: A new set of benzimidazoles clubbed with various heterocycles as GST inhibitors and anticancer agents were synthesized. The biological results proved the potential of the new compounds as GST inhibitors, specifically compounds 7 and 14 which produced more potency than ethacrynic acid by three- and tenfold, respectively. Most compounds exhibited promising cytotoxic activity against breast and colon cancer cell lines...
December 13, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29235889/effects-of-coating-layer-and-release-medium-on-release-profile-from-coated-capsules-with-eudragit-fs-30d-an-in-vitro-and-in-vivo-study
#7
Eskandar Moghimipour, Farid Abedin Dorkoosh, Mohsen Rezaei, Maryam Kouchak, Jafar Fatahiasl, Kambiz Ahmadi Angali, Zahra Ramezani, Mohsen Amini, Somayeh Handali
The aim of the present research was to evaluate the impact of coating layers on release profile from enteric coated dosage forms. Capsules were coated with Eudragit FS 30D using dipping method. The drug profile was evaluated in both phosphate buffer and Hank's solutions. Utilization X-ray imaging, gastrointestinal transmission of enteric coated capsules was traced in rats. According to the results, no release of the drug was found at pH 1.2 and the extent of release drug in pH 6.8 medium was decreased by adding the coating layers...
December 13, 2017: Drug Development and Industrial Pharmacy
https://www.readbyqxmd.com/read/29235734/comparison-of-the-long-term-oncological-outcomes-of-stent-as-a-bridge-to-surgery-and-surgery-alone-in-malignant-colonic-obstruction
#8
Udit Gibor, Zvi Perry, Dan Tirosh, Uri Netz, Alex Rosental, Alex Fich, Sofie Man, Samuel Ariad, Boris Kirshtein
BACKGROUND: Self-expanding metallic stents (SEMS) insertion is an alternative to emergency surgery in malignant colonic obstruction. However, the long-term oncological outcome of stents as a bridge to surgery is limited and controversial. OBJECTIVES: To determine the long-term oncological outcome of stents as a bridge to surgery. METHODS: Data of patients who underwent emergency surgery and endoscopic stent insertion as a bridge to surgery due to obstructing colon cancer at Soroka Medical Center during a 14 year period were collected retrospectively...
December 2017: Israel Medical Association Journal: IMAJ
https://www.readbyqxmd.com/read/29235725/low-temperature-chemotaxis-halotaxis-and-chemohalotaxis-by-the-psychrophilic-marine-bacterium-colwellia-psychrerythraea-34h
#9
G M Showalter, J W Deming
A variety of ecologically important processes are driven by bacterial motility and taxis, yet these basic bacterial behaviors remain understudied in cold habitats. Here we present a series of experiments designed to test the chemotactic ability of the model marine psychrophilic bacterium Colwellia psychrerythraea 34H, when grown at optimal temperature and salinity (8°C, 35 ppt) or its original isolation conditions (-1°C, 35 ppt), towards serine and mannose at temperatures from -8 to 27°C (above its upper growth temperature of 18°C), and at salinities of 15, 35 and 55 ppt (at 8 and -1°C)...
December 13, 2017: Environmental Microbiology Reports
https://www.readbyqxmd.com/read/29235706/a-conserved-tad-pilus-promotes-vibrio-vulnificus-oyster-colonization
#10
Meng Pu, Patrick Duriez, Mattan Arazi, Dean A Rowe-Magnus
Vibrio vulnificus has the highest death rate (>35%) and per-case economic burden ($3.3 million) of any foodborne pathogen in the US. Infections occur via open wounds or following ingestion of contaminated seafood, most infamously oysters. We isolated a 1000th generation descendant, designated NT, that exhibited increased biofilm and aggregate formation relative to its parent. We identified two significant causal changes underlying these NT phenotypes. First, the entire 24-kb capsular polysaccharide biosynthesis locus, which is essential for virulence but inhibits biofilm formation, had been purged from the genome...
December 13, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/29235568/aldh1a3-affects-colon-cancer-in-vitro-proliferation-and-invasion-depending-on-cxcr4-status
#11
Hailiang Feng, Yanyan Liu, Xiaocui Bian, Fangying Zhou, Yuqin Liu
BACKGROUND: Aldehyde dehydrogenase (ALDH) has been widely used as a marker of cancer stem cells (CSCs). However, the ALDH family includes 19 members, and the most relevant isoforms and their biological functions in cancer biology are still controversial. METHODS: We examined ALDH enzyme activity and the mRNA expression of 19 ALDH members in 58 human cell lines. The biological effect and mechanism of knocking down ALDH1A3 with siRNA and shRNA in cell lines were explored...
December 12, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/29235493/small-molecules-related-to-adrenomedullin-reduce-tumor-burden-in-a-mouse-model-of-colitis-associated-colon-cancer
#12
Laura Ochoa-Callejero, Josune García-Sanmartín, Sonia Martínez-Herrero, Susana Rubio-Mediavilla, Judit Narro-Íñiguez, Alfredo Martínez
To investigate the contribution of adrenomedullin (AM) and its gene-related peptide, proadrenomedullin N-terminal 20 peptide (PAMP), to the progression and potential treatment of colon cancer we studied the effects of four small molecules (SM) related to AM and PAMP on a mouse model of colon cancer. For each SM, four experimental groups of male mice were used: (i) Control group; (ii) SM group; (iii) DSS group (injected with azoxymethane [AOM] and drank dextran sulfate sodium [DSS]); and (iv) DSS + SM group (treated with AOM, DSS, and the SM)...
December 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29235402/biofilm-related-disease
#13
Jose Luis Del Pozo
Biofilm formation represents a protected mode of growth that renders bacterial cells less susceptible to antimicrobials and to killing by host immune effector mechanisms and so enables the pathogens to survive in hostile environments and also to disperse and colonize new niches. Biofilm disease includes device-related infections, chronic infections in the absence of a foreign body, and even malfunction of medical devices. Areas covered: This review puts forward a new medical entity that represents a major public health issue, which we have named "biofilm-related disease"...
December 13, 2017: Expert Review of Anti-infective Therapy
https://www.readbyqxmd.com/read/29235397/leptospira-interrogans-outer-membrane-protein-lipl21-is-a-potent-inhibitor-of-neutrophil-myeloperoxidase
#14
Monica L Vieira, Aline F Teixeira, Giselle Pidde-Queiroz, Ana T C Ching, Denise V Tambourgi, Ana Lucia T O Nascimento, Heiko Herwald
Leptospirosis is a widespread zoonotic and neglected infectious disease of human and veterinary concern that is caused by pathogenic Leptospira species. After entrance in the host, pathogenic leptospires evade the host natural defense mechanisms in order to propagate and disseminate to multiple organs. Myeloperoxidase is an enzyme stored in neutrophils azurophilic granules, and is released upon neutrophil activation to produce mainly hypochlorous acid, a strong oxidant and potent antimicrobial agent. In the present investigation, we studied the modulation of myeloperoxidase activity by L...
December 13, 2017: Virulence
https://www.readbyqxmd.com/read/29235207/discriminating-movements-of-liquid-and-gas-in-the-rabbit-colon-with-impedance-manometry
#15
R Mohd Rosli, R E Leibbrandt, L Wiklendt, M Costa, D A Wattchow, N J Spencer, S J Brookes, T I Omari, P G Dinning
BACKGROUND: High-resolution impedance manometry is a technique that is well established in esophageal motility studies for relating motor patterns to bolus flow. The use of this technique in the colon has not been established. METHODS: In isolated segments of rabbit proximal colon, we recorded motor patterns and the movement of liquid or gas boluses with a high-resolution impedance manometry catheter. These detected movements were compared to video recorded changes in gut diameter...
December 13, 2017: Neurogastroenterology and Motility: the Official Journal of the European Gastrointestinal Motility Society
https://www.readbyqxmd.com/read/29235197/superoxide-dismutase-from-helicobacter-pylori-suppresses-the-production-of-pro-inflammatory-cytokines-during-in-vivo-infection
#16
Andrew Stent, Alison L Every, Yok T Chionh, Garrett Z Ng, Philip Sutton
BACKGROUND: Helicobacter pylori has undergone considerable adaptation to allow chronic persistence within the gastric environment. While H. pylori-associated diseases are driven by an excessive inflammation, severe gastritis is detrimental to colonization by this pathogen. Hence, H. pylori has developed strategies to minimize the severity of gastritis it triggers in its host. Superoxide dismutase (SOD) is well known for its role in protecting against oxidative attack; less recognized is its ability to inhibit immunity, shown for SOD from mammalian sources and those of some bacterial species...
December 13, 2017: Helicobacter
https://www.readbyqxmd.com/read/29235008/oncological-assessment-of-stent-placement-for-obstructive-colorectal-cancer-from-circulating-cell-free-dna-and-circulating-tumor-dna-dynamics
#17
Goro Takahashi, Takeshi Yamada, Takuma Iwai, Kohki Takeda, Michihiro Koizumi, Seiichi Shinji, Eiji Uchida
BACKGROUND: The self-expanding metallic stent (SEMS) provides effective decompression for patients with malignant large bowel obstruction (MLBO); however, mechanical damage to malignant cells from insertion may negatively affect prognosis, similar to surgical manipulation, and its oncological safety is unclear. We examined mechanical damage from SEMS placement using circulating cell-free DNA (cfDNA) and circulating tumor DNA (ctDNA). METHODS: Between 1 November 2014 and 30 June 2017, 35 MLBO patients were analyzed, comprising 25 SEMS patients and 10 transanal decompression tube (TDT) patients (control)...
December 12, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/29234938/impact-of-incisional-hernia-development-following-abdominal-operations-on-total-healthcare-cost
#18
Vamsi V Alli, Jianying Zhang, Dana A Telem
BACKGROUND: Introduction of the category III CPT code (0437T) for prophylactic mesh augmentation (PMA) highlights efforts to reduce incisional hernia (IH). PMA's value in the context of value-based care requires understanding both the cost of IH development and the savings from prevention. We hypothesized large healthcare costs with IH development. Appreciating which subsets of patients are at highest risk for IH, and the subsets who have the costliest care is essential in targeting interventions for hernia prevention...
December 12, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29234933/micrornas-and-metastasis-small-rnas-play-big-roles
#19
Jongchan Kim, Fan Yao, Zhenna Xiao, Yutong Sun, Li Ma
MicroRNAs (miRNAs) are small non-coding RNAs regulating post-transcriptional gene expression. They play important roles in many biological processes under physiological or pathological conditions, including development, metabolism, tumorigenesis, metastasis, and immune response. Over the past 15 years, significant insights have been gained into the roles of miRNAs in cancer. Depending on the cancer type, miRNAs can act as oncogenes, tumor suppressors, or metastasis regulators. In this review, we focus on the role of miRNAs as components of molecular networks regulating metastasis...
December 12, 2017: Cancer Metastasis Reviews
https://www.readbyqxmd.com/read/29234904/post-genomics-era-for-orchid-research
#20
REVIEW
Wen-Chieh Tsai, Anne Dievart, Chia-Chi Hsu, Yu-Yun Hsiao, Shang-Yi Chiou, Hsin Huang, Hong-Hwa Chen
Among 300,000 species in angiosperms, Orchidaceae containing 30,000 species is one of the largest families. Almost every habitats on earth have orchid plants successfully colonized, and it indicates that orchids are among the plants with significant ecological and evolutionary importance. So far, four orchid genomes have been sequenced, including Phalaenopsis equestris, Dendrobium catenatum, Dendrobium officinale, and Apostaceae shengen. Here, we review the current progress and the direction of orchid research in the post genomics era...
December 12, 2017: Botanical Studies (Taipei, Taiwan)
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