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https://www.readbyqxmd.com/read/29127880/effects-of-flavonoids-on-microrna-145-regulation-through-klf4-and-myocardin-in-neointimal-formation-in-vitro-and-in-vivo
#1
Chiu-Mei Lin, Bao-Wei Wang, Chun-Ming Pan, Wei-Jen Fang, Su-Kiat Chua, Sheng-Wen Hou, Hang Chang, Kou-Gi Shyu
MicroRNA 145 (miR-145) is a critical modulator of vascular smooth muscle cell (VSMC) phenotyping and proliferation. Flavonoids have been studied extensively due to their diverse pharmacological properties, including anti-inflammatory effects. The aims of this study is designed to evaluate the atheroprotective effects on angiotensin II (Ang II)-induced miR-145 and Klf4/myocardin expression in vitro and in vivo of flavonoids, including (-)-epigallocatechin gallate (EGCG), chrysin, wogonin, silibinin, and ferulic acid...
September 14, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29122749/frontline-defenders-goblet-cell-mediators-dictate-host-microbe-interactions-in-the-intestinal-tract-during-health-and-disease
#2
Joannie M Allaire, Vijay Morampudi, Shauna Mary Crowley, Martin Stahl, Hongbing Yu, Kirandeep Bhullar, Leigh A Knodler, Brian Bressler, Kevan Jacobson, Bruce A Vallance
Goblet cells (GC)s are the predominant secretory epithelial cells lining the luminal surface of the mammalian gastrointestinal (GI) tract. Best known for their apical release of the mucin Muc2, which is critical in the formation of the intestinal mucus barrier, GCs have often been overlooked for their active contributions to intestinal protection and host defense. In part, this oversight reflects the limited tools available to study their function, but also because GCs have long been viewed as relatively passive players in promoting intestinal homeostasis and host defense...
November 9, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29075825/effective-communication-of-cross-sectional-imaging-findings-in-crohn-s-disease-comparing-conventional-emr-reporting-to-a-published-scoring-system
#3
Andrew Flint, Naueen A Chaudhry, Michael Riverso, Angela Pham, Patricia P Moser, Lazarus K Mramba, Ellen M Zimmermann, Joseph R Grajo
PURPOSE: The purpose of the article is to compare information regarding small bowel lesions in Crohn's disease (CD) patients communicated by a published scoring system and radiology reports from electronic medical record (EMR) of cross-sectional abdominal imaging. METHODS: Two gastrointestinal radiologists (reference readers) blinded to EMR reports scored cross-sectional imaging exams using a published scoring system. Investigators compared EMR and radiologist scores based on the mentioned findings and severity documentation of each variable...
October 26, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28971865/the-gastrointestinal-tract-is-a-major-source-of-echinocandin-drug-resistance-in-a-murine-model-of-candida-glabrata-colonization-and-systemic-dissemination
#4
Kelley R Healey, Yoji Nagasaki, Matthew Zimmerman, Milena Kordalewska, Steven Park, Yanan Zhao, David S Perlin
Candida species are a part of the human microbiome and can cause systemic infection upon immune suppression. C. glabrata infections are increasing and have greater rates of antifungal resistance compared to other species. Here, we present a C. glabrata gastrointestinal (GI) colonization model to explore whether colonized yeast exposed to caspofungin, an echinocandin antifungal, develop characteristic resistance mutations, and upon immunosuppression, breakthrough causing systemic infection. Daily therapeutic dosing (5 mg/kg) of caspofungin resulted in no reduction in fecal burdens, organ breakthrough rates similar to control groups, and resistance rates (0-10%) similar to those reported clinically...
October 2, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28937221/in-vivo-dissolution-and-systemic-absorption-of-immediate-release-ibuprofen-in-human-gastrointestinal-tract-under-fed-and-fasted-conditions
#5
Duxin Sun, Jason R Baker, Bo Wen, Ann Frances, Huixia Zhang, Alex Yu, Ting Zhao, Yasuhiro Tsume, Manjunath Pai, Barry Bleske, Xinyuan Zhang, R Lionberger, Allen Lee, Gordon Amidon, William L Hasler, Mark Koenigsknecht
PURPOSE: In vivo drug dissolution in the gastrointestinal (GI) tract is largely unmeasured. The purpose of this clinical study was to evaluate the in vivo drug dissolution and systemic absorption of the BCS Class IIa drug ibuprofen under fed and fasted conditions by direct sampling of stomach and small intestinal luminal content. Expanding current knowledge of drug dissolution in vivo will help to establish physiologically relevant in vitro models predictive of drug dissolution. METHODS: A multi-lumen GI catheter was orally inserted into the GI tract of healthy human subjects...
September 22, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28924591/safety-and-efficacy-of-coaxial-lumen-apposing-metal-stents-in-the-management-of-refractory-gastrointestinal-luminal-strictures-a-multicenter-study
#6
Fateh Bazerbachi, Jason D Heffley, Barham K Abu Dayyeh, Jose Nieto, Eric J Vargas, Tarek Sawas, Raja Zaghlol, Navtej S Buttar, Mark D Topazian, Louis M Wong Kee Song, Michael Levy, Steve Keilin, Qiang Cai, Field F Willingham
BACKGROUND AND AIMS:  Benign gastrointestinal (GI) strictures are often refractory to standard endoscopic interventions. Fully covered coaxial lumen-apposing metal stents (LAMS) have emerged as a novel therapy for these strictures. The aim of this study was to evaluate the safety and efficacy of LAMS for refractory GI strictures. PATIENTS AND METHODS:  A retrospective analysis was performed for patients who underwent LAMS placement for benign luminal strictures in three US centers between January 2014 and December 2016...
September 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28886480/intelligent-visual-localization-of-wireless-capsule-endoscopes-enhanced-by-color-information
#7
George Dimas, Evaggelos Spyrou, Dimitris K Iakovidis, Anastasios Koulaouzidis
Wireless capsule endoscopy (WCE) is performed with a miniature swallowable endoscope enabling the visualization of the whole gastrointestinal (GI) tract. One of the most challenging problems in WCE is the localization of the capsule endoscope (CE) within the GI lumen. Contemporary, radiation-free localization approaches are mainly based on the use of external sensors and transit time estimation techniques, with practically low localization accuracy. Latest advances for the solution of this problem include localization approaches based solely on visual information from the CE camera...
September 1, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28801754/expression-profiling-of-tas2r-genes-reveals-a-complex-pattern-along-the-mouse-gi-tract-and-the-presence-of-tas2r131-in-a-subset-of-intestinal-paneth-cells
#8
Simone Prandi, Anja Voigt, Wolfgang Meyerhof, Maik Behrens
The chemical variability of the intestinal lumen requires the presence of molecular receptors detecting the various substances naturally occurring in the diet and as a result of the activity of the microbiota. Despite their early discovery, intestinal bitter taste receptors (Tas2r) have not yet been assigned an unambiguous physiological function. Recently, using a CRE-recombinant approach we showed that the Tas2r131 gene is expressed in a subset of mucin-producing goblet cells in the colon of mice. Moreover, we also demonstrated that the expression of the Tas2r131 locus is not restricted to this region...
August 11, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28755970/differences-of-first-pass-effect-in-the-liver-and-intestine-contribute-to-the-stereoselective-pharmacokinetics-of-rhynchophylline-and-isorhynchophylline-epimers-in-rats
#9
Xin Wang, Mei Zheng, Jia Liu, Zhifeng Huang, Yidan Bai, Zhuoying Ren, Ziwen Wang, Yangli Tian, Zhou Qiao, Wenyuan Liu, Feng Feng
ETHNOPHARMACOLOGICAL RELEVANCE: Uncaria rhynchophylla (Miq.) Miq. ex Havil., is a plant species used in traditional Chinese medicine to treat cardiovascular and central nervous system diseases. Rhynchophylline (RIN) and isorhynchophylline (IRN), a pair of epimers, are major alkaloids isolated from U. rhynchophylla and exhibit diverse pharmacological effects. Our previous study demonstrated that the pharmacokinetics of these epimers existed stereoselectivity after oral administration; however, the specific mechanism remains unknown and merits investigation...
July 26, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28685396/pharmacokinetics-and-pharmacogenomics-of-bupropion-in-three-different-formulations-with-different-release-kinetics-in-healthy-human-volunteers
#10
Jamie N Connarn, Stephanie Flowers, Marisa Kelly, Ruijuan Luo, Kristen M Ward, Gloria Harrington, Ila Moncion, Masoud Kamali, Melivin McInnis, Meihua R Feng, Vicki Ellingrod, Andrew Babiskin, Xinyuan Zhang, Duxin Sun
The purpose of this pharmacokinetics (PK) study was to investigate whether different release kinetics from bupropion hydrochloride (HCl) immediate release (IR), sustained release (SR), and extended release (ER) formulations alter its metabolism and to test the hypothesis that the unsuccessful bioequivalence (BE) study of the higher strength (300 mg) of bupropion HCl ER tablets based on the successful BE study of the lower strength (150 mg) was due to metabolic saturation in the gastrointestinal (GI) lumen...
July 6, 2017: AAPS Journal
https://www.readbyqxmd.com/read/28648835/effect-of-glp-1-receptor-agonist-on-gastrointestinal-tract-motility-and-residue-rates-as-evaluated-by-capsule-endoscopy
#11
Y Nakatani, M Maeda, M Matsumura, R Shimizu, N Banba, Y Aso, T Yasu, H Harasawa
AIM: This study evaluated the effects of a glucagon-like peptide-1 receptor agonist on gastrointestinal (GI) tract motility and residue rates by examining GI transit time and lumen using capsule endoscopy. MATERIAL AND METHODS: GI motility and lumen were assessed by capsule endoscopy before and after liraglutide administration in 14 patients with type 2 diabetes mellitus (T2DM). RESULTS: Gastric transit time in the group with diabetic neuropathy (DN) was 1:12:36±1:04:30h before liraglutide administration and 0:48:40±0:32:52h after administration (nonsignificant difference, P=0...
June 22, 2017: Diabetes & Metabolism
https://www.readbyqxmd.com/read/28579349/electromagnetic-guided-placement-of-nasoduodenal-feeding%C3%A2-tubes-versus-endoscopic-placement-a-randomized-multicenter-trial
#12
Wouter F W Kappelle, Daisy Walter, Paul H Stadhouders, Hendrik J A Jebbink, Frank P Vleggaar, Peter J van der Schaar, Jan Willem Kappelle, Ingeborg van der Tweel, Medard F M Van den Broek, Frank J Wessels, Peter D Siersema, Jan F Monkelbaan
BACKGROUND AND AIMS: Electromagnetic-guided placement (EMP) of a nasoduodenal feeding tube by trained nurses is an attractive alternative to EGD-guided placement (EGDP). We aimed to compare EMP and EGDP in outpatients, ward patients, and critically ill patients with normal upper GI anatomy. METHODS: In 3 centers with no prior experience in EMP, patients were randomized to placement of a single-lumen nasoduodenal feeding tube either with EGDP or EMP. The primary endpoint was post-pyloric position of the tube on abdominal radiography...
June 1, 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28475050/development-of-a-mechanical-scanning-device-with-high-frequency-ultrasound-transducer-for-ultrasonic-capsule-endoscopy
#13
Xingying Wang, Vipin Seetohul, Ruimin Chen, Zhiqiang Zhang, Ming Qian, Zhehao Shi, Ge Yang, Peitian Mu, Congzhi Wang, Zhihong Huang, Qifa Zhou, Hairong Zheng, Sandy Cochran, Weibao Qiu
Wireless capsule endoscopy has opened a new era by enabling remote diagnostic assessment of the gastrointestinal tract in a painless procedure. Video capsule endoscopy is currently commercially available worldwide. However, it is limited to visualization of superficial tissue. Ultrasound (US) imaging is a complementary solution as it is capable of acquiring transmural information from the tissue wall. This paper presents a mechanical scanning device incorporating a high-frequency transducer specifically as a proof of concept for US capsule endoscopy (USCE), providing information that may usefully assist future research...
September 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28385693/expression-and-localization-of-vpac1-the-major-receptor-of-vasoactive-intestinal-peptide-along-the-length-of-the-intestine
#14
Dulari Jayawardena, Grace Guzman, Ravinder K Gill, Waddah A Alrefai, Hayat Onyuksel, Pradeep K Dudeja
Vasoactive intestinal peptide (VIP) is an endogenous neuropeptide with a broad array of physiological functions in many organs including the intestine. Its actions are mediated via G protein-coupled receptors, and vasoactive intestinal peptide receptor 1 (VPAC1) is the key receptor responsible for majority of VIP's biological activity. The distribution of VPAC1 along the length of the gastrointestinal tract and its subcellular localization in intestinal epithelial cells have not been fully characterized. The current studies were undertaken to determine VPAC1 distribution and localization so that VIP-based therapies can be targeted to specific regions of the intestine...
July 1, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28241955/clinical-issues-march-2017
#15
Sharon A Van Wicklin
Using one flexible endoscope for an upper and lower gastrointestinal (GI) endoscopy procedure Key words: flexible endoscope, esophagogastroduodenoscopy, colonoscopy, enteroscope, risk assessment. Enhanced methods for processing flexible duodenoscopes Key words: flexible duodenoscopes, liquid chemical sterilization, ethylene oxide sterilization, low-temperature sterilization, risk assessment. Modification of the Spaulding classification Key words: Spaulding classification, critical items, semicritical items, mucous membranes, risk assessment...
March 2017: AORN Journal
https://www.readbyqxmd.com/read/28204957/insights-into-the-role-of-opioid-receptors-in-the-gi-tract-experimental-evidence-and-therapeutic-relevance
#16
REVIEW
James J Galligan, Catia Sternini
Opioid drugs are prescribed extensively for pain treatment but when used chronically they induce constipation that can progress to opioid-induced bowel dysfunction. Opioid drugs interact with three classes of opioid receptors: mu opioid receptors (MORs), delta opioid receptors (DOR), and kappa opioid receptors (KORs), but opioid drugs mostly target the MORs. Upon stimulation, opioid receptors couple to inhibitory Gi/Go proteins that activate or inhibit downstream effector proteins. MOR and DOR couple to inhibition of adenylate cyclase and voltage-gated Ca(2+) channels and to activation of K(+) channels resulting in reduced neuronal activity and neurotransmitter release...
2017: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/28114688/lumen-apposing-covered-self-expandable-metal-stents-for-short-benign-gastrointestinal-strictures-a-multicenter-study
#17
MULTICENTER STUDY
Dennis Yang, Jose M Nieto, Ali Siddiqui, Brian P Riff, Christopher J DiMaio, Satish Nagula, Amr M Ismail, Saowanee Ngamreungphong, Mouen A Khashab, Mihir S Wagh, Demetrios Tzimas, Jonathan M Buscaglia, Daniel S Strand, Andrew Y Wang, Shailendra S Chauhan, Christopher E Forsmark, Peter V Draganov
Background and study aim Use of the fully covered self-expandable metal stent (SEMS) for benign luminal gastrointestinal (GI) stricture (BLGS) has been limited by the migration rate. The role of the lumen-apposing metal stent (LAMS) for BLGS is not well defined. We assessed the safety, feasibility, and efficacy of LAMS for the treatment of BLGS. Patients and methods This was an observational, open-label, retrospective, single-arm, multicenter consecutive case series of patients undergoing LAMS placement for BLGS...
April 2017: Endoscopy
https://www.readbyqxmd.com/read/28097745/immature-core-protein-of-hepatitis-c-virus-induces-an-unfolded-protein-response-through-inhibition-of-erad-l-in-a-yeast-model-system
#18
Shota Takahashi, Naoko Sato, Junichi Kikuchi, Hideaki Kakinuma, Jun Okawa, Yukiko Masuyama, Singo Iwasa, Hayato Irokawa, Gi-Wook Hwang, Akira Naganuma, Michinori Kohara, Shusuke Kuge
The structural protein Core of hepatitis C virus (HCV), a cytosolic protein, induces endoplasmic reticulum (ER) stress and unfolded protein response (UPR) in hepatocytes, and is responsible for the pathogenesis of persistent HCV infection. Using yeast as a model system, we evaluated mechanisms underlying Core-induced interference of ER homeostasis and UPR, and found that UPR is induced by the immature Core (aa 1-191, Core191) but not by the mature Core (aa 1-177, Core177). Interestingly, Core191 inhibits both ERAD-L, a degradation system responsible for misfolded/unfolded proteins in the ER lumen, and ERAD-M, a degradation system responsible for proteins carrying a misfolded/unfolded region in the ER membrane...
February 2017: Genes to Cells: Devoted to Molecular & Cellular Mechanisms
https://www.readbyqxmd.com/read/28088292/human-fetal-intestinal-epithelial-cells-metabolize-and-incorporate-branched-chain-fatty-acids-in-a-structure-specific-manner
#19
Lei Liu, Zhen Wang, Hui Gyu Park, Chuang Xu, Peter Lawrence, Xueli Su, Vasuki Wijendran, W Allan Walker, Kumar S D Kothapalli, J Thomas Brenna
BACKGROUND: Branched chain fatty acids (BCFA) are constituents of gastrointestinal (GI) tract in healthy newborn human infants, reduce the incidence of necrotizing enterocolitis (NEC) in a neonatal rat model, and are incorporated into small intestine cellular lipids in vivo. We hypothesize that BCFA are taken up, metabolized and incorporated into human fetal cells in vitro. METHODS: Human H4 cells, a fetal non-transformed primary small intestine cell line, were incubated with albumin-bound non-esterified anteiso-17:0, iso-16:0, iso-18:0 and/or iso-20:0, and FA profiles in lipid fractions were analyzed...
January 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/28074953/gastrointestinal-interactions-absorption-splanchnic-metabolism-and-pharmacokinetics-of-orally-ingested-phenolic-compounds
#20
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
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