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Intestinal absorption

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https://www.readbyqxmd.com/read/28081477/pharmacokinetic-studies-of-active-triterpenoid-saponins-and-the-total-secondary-saponin-from-anemone-raddeana-regel
#1
Dandan Zhang, Tianli Lei, Chongning Lv, Huimin Zhao, Haiyan Xu, Jincai Lu
The rhizome of Anemone raddeana Regel, a Traditional Chinese Medicine (TCM) which has a robust history treating rheumatism and neuralgia. The total secondary saponin (TSS) from it has demonstrated antitumor activity. In this study, a rapid and validated LC-MS/MS method was developed to simultaneously determine the active compounds (Hederacolchiside A1 and Eleutheroside K). Analytes were separated on a reverse-phase C18 column with acetonitrile-water (5mmol/L ammonium acetate) as the mobile phase. This assay showed acceptable linearity (r>0...
January 3, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28077192/dietary-probiotic-supplementation-improves-growth-and-the-intestinal-morphology-of-nile-tilapia
#2
M A Ramos, S Batista, M A Pires, A P Silva, L F Pereira, M J Saavedra, R O A Ozório, P Rema
Probiotic administration can be a nutritional strategy to improve the immune response and growth performance of fish. The current study aimed to evaluate the effects of a probiotic blend (Bacillus sp., Pediococcus sp., Enterococcus sp., Lactobacillus sp.) as a dietary supplement on growth performance, feed utilization, innate immune and oxidative stress responses and intestinal morphology in juvenile Nile tilapia (Oreochromis niloticus). The probiotic was incorporated into a basal diet at three concentrations: 0 g/kg (A0: control), 3 g/kg (A1: 1...
January 12, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28076485/glp-2-a-poorly-understood-mediator-enrolled-in-various-bariatric-metabolic-surgery-related-pathophysiologic-mechanisms
#3
Everton Cazzo, Martinho Antonio Gestic, Murillo Pimentel Utrini, Felipe David Mendonça Chaim, Bruno Geloneze, José Carlos Pareja, Elinton Adami Chaim, Daniéla Oliveira Magro
Introduction: Glucagon-like peptide-2 (GLP-2) is a gastrointestinal hormone whose effects are predominantly trophic on the intestinal mucosa. Aim: Critically evaluate the current literature on the influence of bariatric/metabolic surgery on the levels of GLP-2 and its potential clinical implications. Method: s: Narrative review through online research on the databases Medline and Lilacs. There were six prospective human studies, two cross-sectional human studies, and three experimental animal studies selected...
November 2016: Arquivos Brasileiros de Cirurgia Digestiva: ABCD, Brazilian Archives of Digestive Surgery
https://www.readbyqxmd.com/read/28074953/gastrointestinal-interactions-absorption-splanchnic-metabolism-and-pharmacokinetics-of-orally-ingested-phenolic-compounds
#4
REVIEW
J Abraham Domínguez-Avila, Abraham Wall-Medrano, Gustavo R Velderrain-Rodríguez, C-Y Oliver Chen, Norma Julieta Salazar-López, Maribel Robles-Sánchez, Gustavo A González-Aguilar
The positive health effects of phenolic compounds (PCs) have been extensively reported in the literature. An understanding of their bioaccessibility and bioavailability is essential for the elucidation of their health benefits. Before reaching circulation and exerting bioactions in target tissues, numerous interactions take place before and during digestion with either the plant or host's macromolecules that directly impact the organism and modulate their own bioaccessibility and bioavailability. The present work is focused on the gastrointestinal (GI) interactions that are relevant to the absorption and metabolism of PCs and how these interactions impact their pharmacokinetic profiles...
January 11, 2017: Food & Function
https://www.readbyqxmd.com/read/28074615/a-database-of-optimized-proteomic-quantitative-methods-for-284-human-drug-disposition-related-proteins-for-applications-in-pbpk-modeling
#5
Marc Vrana, Dale Whittington, Vivek Nautiyal, Bhagwat Prasad
The aim of this study was to create an open access repository of validated LC-MS/MS (MRM) methods for quantifying 284 important proteins associated with drug absorption, distribution, metabolism and excretion (ADME). Various in silico and experimental approaches were used to select surrogate peptides and optimize instrument parameters for LC-MS/MS quantification of the selected proteins. The final methods were uploaded to an online public database (ADME QPrOmics(TM); www.qpromics.uw.edu/qpromics/assay/) which provides essential information for facile method development in triple quadrupole MS instruments...
January 11, 2017: CPT: Pharmacometrics & Systems Pharmacology
https://www.readbyqxmd.com/read/28072870/mathematical-modeling-of-intestinal-iron-absorption-using-genetic-programming
#6
Andrea Colins, Ziomara P Gerdtzen, Marco T Nuñez, J Cristian Salgado
Iron is a trace metal, key for the development of living organisms. Its absorption process is complex and highly regulated at the transcriptional, translational and systemic levels. Recently, the internalization of the DMT1 transporter has been proposed as an additional regulatory mechanism at the intestinal level, associated to the mucosal block phenomenon. The short-term effect of iron exposure in apical uptake and initial absorption rates was studied in Caco-2 cells at different apical iron concentrations, using both an experimental approach and a mathematical modeling framework...
2017: PloS One
https://www.readbyqxmd.com/read/28071809/bioaccessibility-of-selenium-from-cooked-rice-as-determined-in-a-simulator-of-the-human-intestinal-tract-shime
#7
Guo-Xin Sun, Tom Van de Wiele, Pradeep Alava, Filip M G Tack, Gijs Du Laing
BACKGROUND: As an essential but also potentially toxic element, both overexposure and underexposure to Se can significantly affect public health. Rice is a common source of selenium (Se), especially in Asia. Not all Se may be released from the rice and become available for absorption into the bloodstream upon digestion in the gastrointestinal tract. Therefore, the bioaccessibility of Se in cooked white (polished) rice was assessed in vitro using the static gastrointestinal simulator SHIME (Simulator of the Human Intestinal Microbial Ecosystem)...
January 10, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28070705/enzymatic-activation-of-double-targeted-5-o-l-valyl-decitabine-prodrug-by-biphenyl-hydrolase-like-protein-and-its-molecular-design-basis
#8
Wenhui Tao, Dongyang Zhao, Mengchi Sun, Meng Li, Xiangyu Zhang, Zhonggui He, Yinghua Sun, Jin Sun
A primary focus of this research was to explore the activation process and mechanism of decitabine (5-aza-2'-deoxycytidine, DAC) prodrug. Recently, it has been reported that biphenyl hydrolase-like protein (BPHL) can play an important role in the activation of some amino acid nucleoside prodrugs with a general preference for hydrophobic amino acids and 5'-esters. Therefore, we put forward a bold hypothesis that this novel enzyme may be primarily responsible for the activation process of DAC prodrug as well...
January 9, 2017: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/28068585/effects-of-phosphate-binders-on-the-gastrointestinal-absorption-of-arsenate-and-of-an-sglt2-inhibitor-drug-on-the-urinary-excretion-of-arsenite-in-mice
#9
Miklós Poór, Balázs Németi, Zoltán Gregus
Arsenate (As(V)) and arsenite (As(III)) are typical sources of acute and chronic arsenic poisoning. Therefore, reducing inner exposure to these arsenicals is a rational objective. Because As(V) mimics phosphate, phosphate binder drugs may decrease the intestinal As(V) absorption. Indeed, lanthanum and aluminium salts and sevelamer removed As(V) from solution in vitro, especially at acidic pH. In mice gavaged with As(V), lanthanum chloride, lanthanum carbonate and aluminium hydroxide given orally also lowered the urinary excretion and tissue levels of As(V) and its metabolites, indicating that they decreased the gastrointestinal As(V) absorption...
January 3, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28067282/gastroprotective-6-gingerol-aspirinate-as-a-novel-chemopreventive-prodrug-of-aspirin-for-colon-cancer
#10
Yingdong Zhu, Fang Wang, Yantao Zhao, Pei Wang, Shengmin Sang
A growing body of research suggests daily low-dose aspirin (ASA) reduces heart diseases and colorectal cancers. However, the major limitation to the use of aspirin is its side effect to cause ulceration and bleeding in the gastrointestinal tract. Preclinical studies have shown that ginger constituents ameliorate ASA-induced gastric ulceration. We here report the design and synthesis of a novel prodrug of aspirin, [6]-gingerol aspirinate (GAS). Our data show that GAS exerts enhanced anti-cancer properties in vitro and superior gastroprotective effects in mice...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28066937/effect-of-dietary-dry-matter-intake-on-endogenous-nitrogen-flows-in-growing-lambs
#11
W Gao, X Gao, A Chen, F Zhang, D Chen, C Liu
The effect of dietary dry matter intake (DMI) on endogenous nitrogen (N) flows at different part of the digestive tract of growing lambs was determined using a (15) N isotope dilution technique. Three Kazakh male lambs (30 ± 2.75 kg of body weights and 4 months old, average daily gain 200 g/day) were fitted with ruminal, duodenal and ileal cannulae and raised in metabolic cage individually. The experiment was conducted in a 3 × 3 Latin square design with three lambs, three DMI levels (1100, 920 and 736 g/day respectively) and three periods...
January 8, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28065787/intestinal-farnesoid-x-receptor-controls-transintestinal-cholesterol-excretion-in-mice
#12
Jan Freark de Boer, Marleen Schonewille, Marije Boesjes, Henk Wolters, Vincent W Bloks, Trijnie Bos, Theo H van Dijk, Angelika Jurdzinski, Renze Boverhof, Justina C Wolters, Jan A Kuivenhoven, Jan M van Deursen, Ronald P J Oude Elferink, Antonio Moschetta, Claus Kremoser, Henkjan J Verkade, Folkert Kuipers, Albert K Groen
BACKGROUND & AIMS: The role of the intestine in the maintenance of cholesterol homeostasis is increasingly recognized. Fecal excretion of cholesterol is the last step in the atheroprotective reverse cholesterol transport pathway, to which biliary and transintestinal cholesterol excretion (TICE) contribute. The mechanisms controlling the flux of cholesterol through the TICE pathway are, however, poorly understood. We aimed to identify mechanisms that regulate and stimulate TICE. METHODS: We performed studies with C57Bl/6J mice, as well as mice with intestine-specific knockout of the farnesoid X receptor (FXR), mice that express an FXR transgene specifically in the intestine, and ABCG8-knockout mice...
January 5, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28064234/effect-of-calcitriol-on-fgf23-level-in-healthy-adults-and-its-dependence-on-phosphate-level
#13
Effrosyni Georgiadou, Helen Marketou, George Trovas, Ismene Dontas, Nikolaos Papaioannou, Konstantinos Makris, Antonios Galanos, Athanasios Papavassiliou
AIM: To evaluate the short-term effects of calcitriol and sevelamer hydrochloride on fibroblast growth factor-23 (FGF23) in humans and to determine whether the effect is direct or indirect through calcitriol-induced increased absorption of phosphorus from the intestine. PATIENTS AND METHODS: A total of 15 healthy individuals were tested at three time points and stages, for 24 h and at 1-week intervals. During each stage, blood samples were taken at three time points (0, 8 and 24 h); baseline stage: under no intervention; second stage, while receiving 0...
2, 2017: In Vivo
https://www.readbyqxmd.com/read/28063242/effects-of-dietary-butyrate-supplementation-on-intestinal-integrity-of-heat-stressed-cockerels
#14
A M Abdelqader, M Abuajamieh, H M Hammad, A-R A Al-Fataftah
Butyrate modulates intestinal epithelial cell structure and function. Three hundred and sixty Lohmann LSL-Classic layer cockerels were used to investigate the effect of butyrate on heat stress-induced intestinal injury and intestinal integrity. The experiment was conducted from day 85 to 105 of age. The birds were divided randomly into three treatments: control, heat stress (HS), and heat stress provided with butyrate (HSB) at a level of 0.35 g/kg of diet. The control was reared at 21 ± 1 °C throughout the experiment...
January 7, 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28062946/upregulated-absorption-of-dietary-palmitic-acids-with-changes-in-intestinal-transporters-in-non-alcoholic-steatohepatitis-nash
#15
Hiroki Utsunomiya, Yasunori Yamamoto, Eiji Takeshita, Yoshio Tokumoto, Fujimasa Tada, Teruki Miyake, Masashi Hirooka, Masanori Abe, Teru Kumagi, Bunzo Matsuura, Yoshio Ikeda, Yoichi Hiasa
BACKGROUND: Palmitic acid is an important risk factor for the pathogenesis of non-alcoholic steatohepatitis (NASH), but changes in palmitic acid intestinal absorption in NASH are unclear. The aim of this study was to clarify changes in palmitic acid intestinal absorption and their association with the pathogenesis of NASH. METHODS: A total of 106 participants were recruited to the study, of whom 33 were control subjects (control group), 32 were patients with NASH Brunt stage 1-2 [early NASH (e-NASH)], and 41 were patients with NASH Brunt stage 3-4 [advanced NASH (a-NASH)]...
January 6, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/28058964/fasting-and-postprandial-plasma-citrulline-and-the-correlation-to-intestinal-function-evaluated-by-72-hour-metabolic-balance-studies-in-short-bowel-jejunostomy-patients-with-intestinal-failure
#16
Hilde Fjermestad, Mark Hvistendahl, Palle Bekker Jeppesen
BACKGROUND: Fasting plasma citrulline (p-citrulline) is a marker of functional enterocyte mass. However, the optimal timing of measurement in relation to meals has yet to be clarified. Furthermore, p-citrulline has been proposed to be a surrogate marker for small bowel length and intestinal absorption parameters in short bowel syndrome patients with intestinal failure (SBS-IF). MATERIALS AND METHODS: Eight patients with SBS-IF and 8 healthy controls (HCs) were given a standardized mixed test meal, and p-citrulline was measured 15 minutes before and 60, 120, and 180 minutes after completion of the meal...
January 1, 2017: JPEN. Journal of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28057006/bisphenol-a-promotes-cholesterol-absorption-in-caco-2-cells-by-up-regulation-of-npc1l1-expression
#17
Dan Feng, Jun Zou, Shanshan Zhang, Xuechun Li, Peiyang Li, Minqi Lu
BACKGROUND: Bisphenol A (BPA), an commonly exposed environmental chemicals in humans, has been shown to have a hypercholesterolemic effect with molecular mechanism not clear. Since intestinal cholesterol absorption plays a major role in maintaining total body cholesterol homeostasis, the present study is to investigate whether BPA affects cholesterol absorption in the intestinal Caco-2 cells. METHODS: The Caco-2 cells were pretreated with BPA at different concentrations for 24 h and then incubated with radioactive micellar cholesterol for 2 h...
January 6, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28056419/chamomile-matricaria-recutita-l-decoction-extract-inhibits-in-vitro-intestinal-glucose-absorption-and-attenuates-high-fat-diet-induced-lipotoxicity-and-oxidative-stress
#18
Mohamed-Amine Jabri, Mohsen Sakly, Lamjed Marzouki, Hichem Sebai
The present study aimed to investigate the inhibitory effect of chamomile decoction extract (CDE) on intestinal glucose absorption as well as its protective role against high fat diet (HFD)-induced obesity and lipotoxicity in rats. We used the Ussing chamber system to investigate the effect of CDE on intestinal transport of glucose. Male Wistar rats were fed HFD for six weeks to provoke obesity. CDE (100mg/kg, b.w. p.o.) has been per orally administered to HFD fed rats. Ex vivo, we found that CDE significantly and dose-dependently increased intestinal absorption of glucose...
January 2, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28052864/lipopolysaccharide-inhibits-colonic-biotin-uptake-via-interference-with-membrane-expression-of-its-transporter-a-role-for-casein-kinase-2-mediated-pathway
#19
Ram Lakhan, Hamid M Said
Biotin (vitamin B7), an essential micronutrient for normal cellular functions, is obtained from both dietary sources as well as gut microbiota. Absorption of biotin in both the small and large intestine is via a carrier-mediated process that involves the sodium-dependent multivitamin transporter, SMVT. While different physiological and molecular aspects of intestinal biotin uptake have been delineated, nothing is known about the effect of LPS on the process. We addressed this issue using in vitro (human colonic epithelial NCM460 cells) and in vivo (mice) models of LPS exposure...
January 4, 2017: American Journal of Physiology. Cell Physiology
https://www.readbyqxmd.com/read/28052855/syn-004-ribaxamase-an-oral-%C3%AE-lactamase-designed-to-protect-the-gut-microbiome-from-the-deleterious-effects-of-certain-intravenously-administered-%C3%AE-lactam-antibiotics-degrades-ceftriaxone-excreted-into-the-intestine-in-phase-2a-clinical-studies
#20
John F Kokai-Kun, Tracey Roberts, Olivia Coughlin, Eric Sicard, Marianne Rufiange, Richard Fedorak, Christian Carter, Marijke H Adams, James Longstreth, Heidi Whalen, Joseph Sliman
SYN-004 (ribaxamase) is a β-lactamase designed to be orally administered concurrently with intravenous β-lactam antibiotics including most penicillins and cephalosporins. Ribaxamase's anticipated mechanism of action is to degrade excess β-lactam antibiotic that is excreted into the small intestine. This enzymatic inactivation of excreted antibiotic is expected to protect the gut microbiome from disruption and thus prevent undesirable side effects including secondary infections like Clostridium difficile as well as other antibiotic-associated diarrheas...
January 4, 2017: Antimicrobial Agents and Chemotherapy
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