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https://www.readbyqxmd.com/read/28530576/efficient-delivery-of-quercetin-after-binding-to-beta-lactoglobulin-followed-by-formation-soft-condensed-core-shell-nanostructures
#1
Seyedeh Fatemeh Mirpoor, Seyed Mohammad Hashem Hosseini, Abdo-Reza Nekoei
Nature-made inherent transporting property of beta-lactoglobulin (BLG) was exploited to develop delivery systems for quercetin. After binding to BLG, quercetin was nanoencapsulated within soft-condensed nanostructures of BLG and sodium alginate (ALG). Fluorimetry results revealed that quercetin could bind to BLG even at acidic conditions. The amounts of stoichiometry binding (n) were 1.24 and 1.62 at pH values of 4 and 7, respectively. Formation of core-shell type nanostructures was confirmed by transmission electron microscopy...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28527897/advanced-glycation-endproducts-form-during-ovalbumin-digestion-in-the-presence-of-fructose-inhibition-by-chlorogenic-acid
#2
Yasmin Bains, Alejandro Gugliucci, Russell Caccavello
BACKGROUND: One mechanism by which fructose could exert deleterious effects is through intestinal formation and absorption of pro-inflammatory advanced glycation endproducts via the Maillard reaction. We employed simulated stomach and duodenum digestion of ovalbumin (OVA) to test the hypothesis that advanced glycation endproducts (AGEs) are formed by fructose during simulated digestion of a ubiquitous food protein under model physiological conditions. METHODS: OVA was subjected to simulated gastric and intestinal digestion using standard models, in presence of fructose or glucose (0-100mM)...
May 17, 2017: Fitoterapia
https://www.readbyqxmd.com/read/28527283/-frequency-of-helicobacter-pylori-nitroreductase-rdxa-mutations-for-metronidazole-activation-in-a-population-in-the-cauca-department-colombia
#3
Claudia Patricia Acosta, Andrés Javier Quiroga, Carlos H Sierra, Alba Alicia Trespalacios
INTRODUCTION: Resistance to metronidazole is a key factor associated with Helicobacter pylori treatment failure. Even though resistance is mostly associated with RdxA nitroreductase mutations, studies of this H. pylori protein in Popayán (Colombia) are still incipient. OBJECTIVE: To evaluate the frequency of mutations in the RdxA nitroreductase in a population of patients with H. pylori-positive gastrointestinal disease. MATERIALS AND METHODS: We amplified the DNA of 170 gastric biopsies by PCR to detect mutations in the RdxA nitroreductase...
June 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28526687/ffa2-activation-combined-with-ulcerogenic-cox-inhibition-induces-duodenal-mucosal-injury-via-the-5-ht-pathway-in-rats
#4
Yasutada Akiba, Koji Maruta, Kazuyuki Narimatsu, Hyder Said, Izumi Kaji, Ayaka Kuri, Ken-Ichi Iwamoto, Atsukazu Kuwahara, Jonathan D Kaunitz
Serotonin (5-HT), predominantly synthesized and released by enterochromaffin cells, is implicated in gastrointestinal symptoms such as emesis, abdominal pain and diarrhea. Since luminal short-chain fatty acids (SCFAs) release 5-HT from enterochromaffin cells, which express the SCFA receptor FFA2 in rat duodenum, we examined the effects of the selective FFA2 agonist phenylacetamide-1 (PA1) on duodenal 5-HT release with consequent bicarbonate secretion (DBS) and on indomethacin (IND)-induced enteropathy. Intestinal injury was induced by IND (10 mg/kg, sc) with or without PA1...
May 19, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28525931/innovative-delivery-method-using-a-detachable-device-to-deliver-a-large-polyglycolic-acid-sheet-to-a-gastric-ulcer-perforation
#5
Hirohito Mori, Hideki Kobara, Asadur Rahman, Noriko Nishiyama, Akira Nishiyama, Yasuyuki Suzuki, Tsutomu Masaki
No abstract text is available yet for this article.
May 19, 2017: Endoscopy
https://www.readbyqxmd.com/read/28525714/characterization-of-bitter-compounds-via-modulation-of-proton-secretion-in-human-gastric-parietal-cells-in-culture
#6
Kathrin I Liszt, Joachim Hans, Jakob P Ley, Elke Köck, Veronika Somoza
Humans perceive bitterness via around 25 different bitter receptors. Therefore, the identification of antagonists remains a complex challenge. We previously demonstrated several bitter tasting compounds such as caffeine to induce acid secretion in the stomach and in a human gastric tumor cell line (HGT-1). Here, the results of a fluorescent-based in vitro assay using HGT-1 cells and a human sensory panel testing nine selected potential bitter modulators with or without the bitter compounds caffeine or theobromine, were compared...
May 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28523296/a-systematic-review-of-the-possible-carcinogenic-role-of-the-aristolochic-acid
#7
Tivadar Bara, Simona Gurzu, Haruhiko Sugimura, Tivadar Bara, Marius Alexandru Beleaua, Ioan Jung
Aristolochic acid (AA) is a bioactive component of Chinese herbs, dietary supplements, slimming pills and contaminated flour, which is known to induce chronic tubulointerstitial disease. AA is also shown to be involved in the genesis of the upper urinary tract urothelial carcinoma (UTUC) and some other cancers, but its tumorigenic role is far to be understood. We performed a systematic literature review regarding the involvement of AA in malignant processes and molecular pathways of carcinogenesis. Twenty representative papers were selected for this review...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28522911/study-of-the-effects-of-nesfatin-1-on-gastric-function-in-obese-rats
#8
Guo-Tao Yang, Hong-Ying Zhao, Yu Kong, Ning-Ning Sun, Ai-Qin Dong
AIM: To investigate the effects of nesfatin-1 on gastric function in obese rats. METHODS: The obese rat model was induced by a high-fat diet. The gastric emptying rate and gastric acid secretory capacity of the rats were determined after treatment with different drug concentrations of nesfatin-1 and administration routes. Based on this, the expression of H+/K+-ATPase was measured using RT-PCR and western blot to preliminarily explore the mechanism of gastric acid secretion changes...
April 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28522905/strategies-used-by-helicobacter-pylori-to-establish-persistent-infection
#9
REVIEW
Amin Talebi Bezmin Abadi
Helicobacter pylori (H. pylori) is a Gram-negative and motile bacterium that colonizes the hostile microniche of the human stomach, then persists for the host's entire life, if not effectively treated. Clinically, H. pylori plays a causative role in the development of a wide spectrum of diseases including chronic active gastritis, peptic ulceration, gastric adenocarcinoma, and gastric mucosa-associated lymphoid tissue lymphoma. Due to the global distribution of H. pylori, it is no exaggeration to conclude that smart strategies are contributing to adaptation of the bacterium to its permanent host...
April 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28522805/nitric-oxide-donor-protects-against-acetic-acid-induced-gastric-ulcer-in-rats-via-s-nitrosylation-of-trpv1-on-vagus-nerve
#10
Ting Han, Yan Tang, Jing Li, Bing Xue, Liping Gong, Jingxin Li, Xiao Yu, Chuanyong Liu
This study was conducted to investigate the effects of nitric oxide (NO) in acetic acid-induced gastric ulcer of rats and the underlying mechanisms. We found that peritoneal injection of sodium nitroprusside (SNP), a NO donor, decreased the ulcer area, inflammatory cell infiltration and MPO degree in acetic acid-induced gastric ulcer in rats. This effect was abolished by a transient receptor potential vanilloid 1 (TRPV1) antagonist or prior subdiaphragmatic vagotomy. SNP increased the jejunal mesenteric afferent discharge in a dose-depended manner, which was largely diminished by pretreatment of S-nitrosylation blocker N-ethylmaleimide, TRPV1 antagonist capsazepine, genetic deletion of TRPV1, or vagotomy...
May 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28522264/discovery-synthesis-and-structure-activity-relations-of-3-4-dihydro-1h-spiro-naphthalene-2-2-piperidin-1-ones-as-potassium-competitive-acid-blockers
#11
Toshihiro Imaeda, Koji Ono, Kazuo Nakai, Yasunobu Hori, Jun Matsukawa, Terufumi Takagi, Yasushi Fujioka, Naoki Tarui, Mitsuyo Kondo, Akio Imanishi, Nobuhiro Inatomi, Masahiro Kajino, Fumio Itoh, Haruyuki Nishida
With the aim to discover a gastric antisecretory agent more potent than the existing proton pump inhibitors, novel 3,4-dihydro-1H-spiro(naphthalene-2,2'-piperidin)-1-one derivatives, which could occupy two important lipophilic pockets (described as LP-1 and LP-2) of H(+),K(+)-ATPase and can strongly bind to the K(+)-binding site, were designed based on a docking model. Among the compounds synthesized, compound 4d showed a strong H(+),K(+)-ATPase-inhibitory activity and a high stomach concentration in rats, resulting in potent inhibitory action on histamine-stimulated gastric acid secretion in rats...
May 6, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28521673/simple-strategy-to-protect-lactase-activity-in-solid-formulation
#12
Aline Gravinez Perissinato, André Luis Morais Ruela, Gislaine Ribeiro Pereira, Jerusa Simone Garcia, Marcello Garcia Trevisan
Lactose intolerance is characterized by the absence of the enzyme lactase (beta-galactosidase) and affects two thirds of the world adult population. Our aim was to evaluate a lactase gastro formulation to ensure increased activity in the action site of the enzyme (lumen of the small intestine). Simultaneously, we also evaluated the commercial product stability and enzyme activity. When carrying out dissolution test in commercial product it is noted that the existing formulation is not able to protect the enzyme from degrading action of gastric environment (a loss of 86...
May 18, 2017: Current Drug Delivery
https://www.readbyqxmd.com/read/28520953/evolving-insights-into-the-epidemiology-and-control-of-clostridium-difficile-in-hospitals
#13
Daniel A Caroff, Deborah S Yokoe, Michael Klompas
Typing studies suggest most cases of hospital-onset Clostridium difficile infection are unrelated to other cases of active disease in the hospital. New cases may instead be due to transmissions from asymptomatic carriers or progression of latent C.difficile present-on-admission to active infection. Direct exposure to antibiotics remains the primary risk factor for C.difficile infection but ward-level antibiotic use, antibiotic exposure of the prior room occupant, and C.difficile status of the prior room occupant increase risk for C...
May 17, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28516373/class-side-effects-decreased-pressure-in-the-lower-oesophageal-and-the-pyloric-sphincters-after-the-administration-of-dopamine-antagonists-neuroleptics-anti-emetics-l-name-pentadecapeptide-bpc-157-and-l-arginine
#14
Zeljka Belosic Halle, Josipa Vlainic, Domagoj Drmic, Dean Strinic, Kresimir Luetic, Mario Sucic, Maria Medvidovic-Grubisic, Tatjana Pavelic Turudic, Igor Petrovic, Sven Seiwerth, Predrag Sikiric
The ulcerogenic potential of dopamine antagonists and L-NAME in rats provides unresolved issues of anti-emetic neuroleptic application in both patients and experimental studies. Therefore, in a 1-week study, we examined the pressures within the lower oesophageal and the pyloric sphincters in rats [assessed manometrically (cm H2O)] after dopamine neuroleptics/prokinetics, L-NAME, L-arginine and stable gastric pentadecapeptide BPC 157 were administered alone and/or in combination. Medication (/kg) was given once daily intraperitoneally throughout the 7 days, with the last dose at 24 h before pressure assessment...
May 17, 2017: Inflammopharmacology
https://www.readbyqxmd.com/read/28514401/-differentiation-therapy-for-non-acidic-gastroesophageal-reflux-disease
#15
N B Lishchuk, V I Simanenkov, S V Tikhonov
AIM: To investigate the clinical and pathogenetic features of the non-acidic types of gastroesophageal reflux disease (GERD) and to evaluate the impact of combined therapy versus monotherapy on the course of this disease. SUBJECTS AND METHODS: The investigation enrolled 62 patients with non-acidic GERD. The follow-up period was 6 weeks. The patients were divided into 2 groups: 1) weakly acidic gastroesophageal refluxes (GER); 2) weakly alkaline GER. Then each group was distributed, thus making up 4 groups: 1) 19 patients with weakly acidic GER who received monotherapy with rabeprazole 20 mg/day; 2) 21 patients with weakly acidic GER had combined therapy with rabeprazole 20 mg and itopride; 3) 8 patients with weakly alkaline GER who received ursodeoxycholic acid (UDCA) monotherapy; and 4) 14 patients with weakly alkaline GER who had combined therapy with UDCA and itopride, The clinical symptoms of the disease, the endoscopic pattern of the upper gastrointestinal tract (GIT) mucosa, histological changes in the esophageal and gastric mucosa, and the results of 24-hour impedance pH monitoring were assessed over time...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28512631/genetic-alterations-in-gastric-cancer-associated-with-helicobacter-pylori-infection
#16
REVIEW
Claudia I Rivas-Ortiz, Yolanda Lopez-Vidal, Luis Jose Rene Arredondo-Hernandez, Gonzalo Castillo-Rojas
Gastric cancer is a world health problem and depicts the fourth leading mortality cause from malignancy in Mexico. Causation of gastric cancer is not only due to the combined effects of environmental factors and genetic variants. Recent molecular studies have transgressed a number of genes involved in gastric carcinogenesis. The aim of this review is to understand the recent basics of gene expression in the development of the process of gastric carcinogenesis. Genetic variants, polymorphisms, desoxyribonucleic acid methylation, and genes involved in mediating inflammation have been associated with the development of gastric carcinogenesis...
2017: Frontiers in Medicine
https://www.readbyqxmd.com/read/28512605/toxicity-status-and-antiulcerative-potential-of-sansevieria-trifasciata-leaf-extract-in-wistar-rats
#17
Osasenaga Macdonald Ighodaro, Abiola Muhammad Adeosun, Barinemene Francis Ojiko, Abeeb Taiwo Akorede, Oyindamola Fuyi-Williams
AIMS: The lethal dose 50% (LD50) and antiulcerative potentials of Sansevieria trifasciata (ST) leaf extract were investigated. MATERIALS AND METHODS: LD50 was determined through two routes of administration (intraperitoneal [i.p] and oral [p.o]) using the method of Lorke. The antiulcerative activity was evaluated in indomethacin-induced ulcer model (40 mg/kg body weight [BW], i.p, single dose) against a reference drug, cimetidine (100 mg/kg BW, p.o). ST was assessed at two different doses (200 and 400 mg/kg BW, p...
April 2017: Journal of Intercultural Ethnopharmacology
https://www.readbyqxmd.com/read/28511679/evaluation-of-anti-inflammatory-and-gastric-anti-ulcer-activity-of-phyllanthus-niruri-l-euphorbiaceae-leaves-in-experimental-rats
#18
Ronia Mostofa, Shanta Ahmed, Mst Marium Begum, Md Sohanur Rahman, Taslima Begum, Siraj Uddin Ahmed, Riazul Haque Tuhin, Munny Das, Amir Hossain, Manju Sharma, Rayhana Begum
BACKGROUND: The medicinal plants signify a massive basin of potential phytoconstituents that could be valuable as a substitute to allopathic drugs or considered as an analogue in drug development. Phyllanthus niruri L. (Euphorbiaceae) is generally used in traditional medicine to treat ulcer and inflammation. In this project we investigated the methanolic extract of leaves of Phyllanthus niruri for anti-inflammatory and anti-ulcer activity. METHODS: The anti-inflammatory activity of methanol extract of Phyllanthus niruri leaves was evaluated at the doses of 100, 200 and 400 mg/kg, p...
May 16, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28507800/formyl-peptide-receptor-1-suppresses-gastric-cancer-angiogenesis-and-growth-by-exploiting-inflammation-resolution-pathways
#19
Nella Prevete, Federica Liotti, Anna Illiano, Angela Amoresano, Piero Pucci, Amato de Paulis, Rosa Marina Melillo
Chronic inflammation can result from inadequate engagement of resolution mechanisms, mainly accomplished by specialized pro-resolving mediators (SPMs) arising from the metabolic activity of lipoxygenases (ALOX5/15) on ω-6 or ω-3 essential polyunsaturated fatty acids (PUFA). We previously demonstrated that formyl peptide receptor 1 (FPR1) suppresses gastric cancer (GC) by inhibiting its inflammatory/angiogenic potential. In this study, we asked whether FPR1 exploits inflammation resolution pathways to suppress GC angiogenesis and growth...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28506699/cra-crosolic-acid-isolated-from-actinidia-valvata-dunn-radix-induces-apoptosis-of-human-gastric-cancer-cell-line-bgc823-in%C3%A2-vitro-via-down-regulation-of-the-nf-%C3%AE%C2%BAb-pathway
#20
Qi-Lai Cheng, Hong-Liang Li, Ying-Chen Li, Zhao-Wen Liu, Xiao-Hua Guo, Yi-Jian Cheng
A natural ursolic compound, 2α,3β-dihydroxy-urs-12-en-28-oic acid (corosolic acid, CRA) was isolated from the root of Actinidia valvata Dunn. (A. valvata Radix). Since a large number of triterpenoid compound has marked anticancer effects toward various types of cancer cell lines in vitro, this study was carried out to investigate the anticancer effect of CRA in human gastric cancer cell line BGC823 cells and the underlying apoptotic mechanism of CRA was examined in BGC823 cell lines. The results showed that CRA significantly suppressed the viability of BGC823 cells in a concentration- and time-dependent manner...
May 12, 2017: Food and Chemical Toxicology
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