keyword
MENU ▼
Read by QxMD icon Read
search

Protein pump inhibitor

keyword
https://www.readbyqxmd.com/read/28096160/determinants-of-antibacterial-spectrum-and-resistance-potential-of-the-elongation-factor-g-inhibitor-argyrin-b-in-key-gram-negative-pathogens
#1
Adriana K Jones, Angela L Woods, Kenneth T Takeoka, Xiaoyu Shen, Jun-Rong Wei, Ruth E Caughlan, Charles R Dean
Argyrins are natural products with antibacterial activity against Gram-negative pathogens such as P. aeruginosa, B. multivorans and S. maltophilia We previously showed that argyrin B targets elongation factor G (FusA). Here we show that Argyrin B activity against P. aeruginosa PAO1 (MIC = 8 μg/mL) was not affected by deletion of the MexAB-OprM, MexXY-OprM, MexCD-OprJ or MexEF-OprN efflux pumps. However, argyrin B induced expression of MexXY causing a slight but reproducible antagonism with the MexXY substrate antibiotic ciprofloxacin...
January 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28052644/effect-of-thymol-on-ca%C3%A2-%C3%A2-%C2%BA-homeostasis-and-viability-in-pc3-human-prostate-cancer-cells
#2
Jeng-Hsien Yeh, Chiang-Ting Chou, I-Shu Chen, Ti Lu, Ko-Long Lin, Chia-Cheng Yu, Wei-Zhe Liang, Hong-Tai Chang, Chun-Chi Kuo, Chin-Man Ho, Wen-Teng Chang, Pochuen Shieh, Chung-Ren Jan
Thymol is a phenolic compound that affects physiology in different cell models. However, whether thymol affects Ca²⁺ homeostasis in prostate cancer cells is unknown. The action of this compound on cytosolic Ca²⁺ concentrations ([Ca²⁺]i) and viability in PC3 human prostate cancer cells was explored. The results show that thymol at concentrations of 100-1500 μM caused [Ca²⁺]i rises in a concentration-dependent manner. Removal of extracellular Ca²⁺ reduced thymol’s effect by approximately 80%...
28, 2017: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/28039570/different-transcriptional-profiling-between-senescent-and-non-senescent-human-coronary-artery-endothelial-cells-hcaecs-by-omeprazole-and-lansoprazole-treatment
#3
Laura Costarelli, Robertina Giacconi, Marco Malavolta, Andrea Basso, Francesco Piacenza, Mauro Provinciali, Marcello G Maggio, Andrea Corsonello, Fabrizia Lattanzio
Recent evidence suggests that high dose and/or long term use of proton pump inhibitors (PPIs) may increase the risk of adverse cardiovascular events in older patients, but mechanisms underlying these detrimental effects are not known. Taking into account that the senescent endothelial cells have been implicated in the genesis or promotion of age-related cardiovascular disease, we hypothesized an active role of PPIs in senescent cells. The aim of this study is to investigate the changes in gene expression occurring in senescent and non-senescent human coronary artery endothelial cells (HCAECs) following Omeprazole (OPZ) or Lansoprazole (LPZ) treatment...
December 30, 2016: Biogerontology
https://www.readbyqxmd.com/read/28034583/differential-hypertensive-protease-expression-in-the-thoracic-versus-abdominal-aorta
#4
Jean Marie Ruddy, Adam W Akerman, Denise Kimbrough, Elizabeth K Nadeau, Robert E Stroud, Rupak Mukherjee, John S Ikonomidis, Jeffrey A Jones
BACKGROUND: Hypertension (HTN), which is a major risk factor for cardiovascular morbidity and mortality, can drive pathologic remodeling of the macro- and microcirculation. Patterns of aortic pathology differ, however, suggesting regional heterogeneity of the pressure-sensitive protease systems triggering extracellular matrix remodeling in the thoracic (TA) and abdominal aortas (AA). This study tested the hypothesis that the expression of two major protease systems (matrix metalloproteinases [MMPs] and cathepsins) in the TA and AA would be differentially affected with HTN...
December 26, 2016: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28032595/prospective-identification-of-resistance-mechanisms-to-hsp90-inhibition-in-kras-mutant-cancer-cells
#5
Arefeh Rouhi, Christina Miller, Sarah Grasedieck, Stefanie Reinhart, Britta Stolze, Hartmut Döhner, Florian Kuchenbauer, Lars Bullinger, Stefan Fröhling, Claudia Scholl
Inhibition of the HSP90 chaperone results in depletion of many signaling proteins that drive tumorigenesis, such as downstream effectors of KRAS, the most commonly mutated human oncogene. As a consequence, several small-molecule HSP90 inhibitors are being evaluated in clinical trials as anticancer agents. To prospectively identify mechanisms through which HSP90-dependent cancer cells evade pharmacologic HSP90 blockade, we generated multiple mutant KRAS-driven cancer cell lines with acquired resistance to the purine-scaffold HSP90 inhibitor PU-H71...
December 9, 2016: Oncotarget
https://www.readbyqxmd.com/read/28029615/on-chip-bioelectric-impedance-spectroscopy-reveals-the-effect-of-p-glycoprotein-efflux-pumps-on-the-paracellular-impedance-of-tight-junctions-at-the-blood-brain-barrier
#6
Ramsey Kraya, Alexander Komin, Peter Searson
Bioelectric impedance spectroscopy was used to elucidate the influence of P-gp efflux pumps on the kinetics of tight junction down-regulation in confluent monolayers of Madine Darby Canine Kidney Epithelial Cells (MDCK) following administration of phenylarsine oxide (PAO), a molecule that inhibits protein tyrosine phosphatases (PTP) and induces matrix metalloproteinase activity. Matrix metalloproteinases (MMPs) and phosphatase inhibitors induce modification of occludin tight junction proteins critical for the proper function of the blood-brain barrier...
October 2016: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/27996295/medicinal-plants-for-management-of-gastroesophageal-reflux-disease-a-review-of-animal-and-human-studies
#7
Mehdi Salehi, Hossein Karegar-Borzi, Mehrdad Karimi, Roja Rahimi
OBJECTIVES: Gastroesophageal reflux disease (GERD) is a prevalent gastrointestinal disease that causes troublesome symptoms and/or complications. The major therapeutic strategy for GERD focuses mainly on symptom alleviation using proton pump inhibitors (PPIs), which does not produce a perfect response in all patients. An approach with new therapeutic agents for GERD seems to be essential. The aim of this study was to review animal and human studies investigating the effect of medicinal plants in GERD as well as mechanisms underlying their therapeutic effects...
December 20, 2016: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/27991740/determination-of-rabeprazole-enantiomers-in-dog-plasma-by-supercritical-fluid-chromatography-tandem-mass-spectrometry-and-its-application-to-a-pharmacokinetic-study
#8
Chong Su, Hong Yang, Xiangjun Meng, J Paul Fawcett, Jianming Cao, Yan Yang, Jingkai Gu
Rabeprazole is a novel benzimidazole proton pump inhibitor used for the treatment of gastrointestinal disorders. It is a chiral molecule that gives rise to the possibility of stereoselective pharmacokinetics. To investigate this phenomenon, a rapid and sensitive chiral assay based on supercritical fluid chromatography tandem mass spectrometry was developed and applied to the determination of (R)-rabeprazole and (S)-rabeprazole in dog plasma. Sample preparation involved protein precipitation with acetonitrile after addition of (R)-lansoprazole as internal standard...
December 19, 2016: Journal of Separation Science
https://www.readbyqxmd.com/read/27960647/proton-pump-inhibitors-use-suppresses-iron-absorption-in-congenital-dyserythropoietic-anemia
#9
Hanna Shalev, Abed Abu Quider, Miriam Ben Harosh, Josef Kapelushnik
Congenital dyserythropoietic anemia type I (CDA I) is associated, as other anemic noninflammatory states, with ineffective erythropoiesis and increased iron absorption, which may lead to complication of iron overload. The latter complication requires iron-chelating therapy, which may be associated with adverse effects and toxicity. Gastric acid production is known to be an important factor that facilitates non-heme iron absorption. The purpose of this study was to examine whether treatment with proton pump inhibitors (PPIs) can decrease iron absorption in patients with CDA I...
October 2016: Pediatric Hematology and Oncology
https://www.readbyqxmd.com/read/27940051/attenuated-jnk-signaling-in-multidrug-resistant-leukemic-cells-dual-role-of-mapk-in-cell-survival
#10
David Cerezo, Antonio J Ruiz-Alcaraz, Miriam Lencina-Guardiola, Manuel Cánovas, Pilar García-Peñarrubia, Inmaculada Martínez-López, Elena Martín-Orozco
Having found previously that leukemic cells with multidrug resistant (MDR) phenotype, but not their sensitive counterparts, exhibit collateral sensitivity to cold stress in a P-gp-dependent manner, our aim was to study the signaling pathways involved in this phenomenon in sensitive (L1210) and resistant cells (L1210R and CBMC-6). It was observed that the acquisition of MDR phenotype by leukemic cells or their transfection with the extrussion pump, P-gp, modifies the activation profile and regulation of Mitogen-Activated Protein Kinases (MAPK) in cells exposed to low temperatures...
January 2017: Cellular Signalling
https://www.readbyqxmd.com/read/27916771/a-case-of-left-subphrenic-abscess-caused-by-gastric-ulcer-penetration-that-was-successfully-treated-with-endoscopic-transgastric-drainage
#11
Yuki Hanaoka, Dai Sugimoto, Hiroshi Nakamura, Hiroko Yamashita, Hiroaki Igarashi, Itsuro Ogata
A 65-year-old male visited our hospital because of fever and difficulty in walking. He was suffering from left-sided hypochondrial pain for a month. Laboratory tests performed on admission revealed a white blood cell count of 1700/μl and C-reactive protein level of 9.51mg/dl, which were suggestive of severe inflammation. Contrast-enhanced computed tomography revealed a subphrenic abscess around the spleen, which we considered to be caused by gastric penetration into the gastrosplenic ligament. Upper esophagogastroduodenoscopy revealed a gastric ulcer together with a fistula that connected to the left subphrenic abscess...
2016: Nihon Shokakibyo Gakkai Zasshi, the Japanese Journal of Gastro-enterology
https://www.readbyqxmd.com/read/27895902/effect-of-%C3%AE-lactamase-inhibitors-on-in-vitro-activity-of-%C3%AE-lactam-antibiotics-against-burkholderia-cepacia-complex-species
#12
Annelien Everaert, Tom Coenye
BACKGROUND: Bacteria belonging to the Burkholderia cepacia complex (Bcc) are an important cause of chronic respiratory tract infections in cystic fibrosis patients. Intrinsic resistance to a wide range of antimicrobial agents, including a variety of β-lactam antibiotics, is frequently observed in Bcc strains. Resistance to β-lactams is most commonly mediated by efflux pumps, alterations in penicillin-binding proteins or the expression of β-lactamases. β-lactamase inhibitors are able to restore the in vitro activity of β-lactam molecules against a variety of Gram-negative species, but the effect of these inhibitors on the activity of β-lactam treatment against Bcc species is still poorly investigated...
2016: Antimicrobial Resistance and Infection Control
https://www.readbyqxmd.com/read/27866273/omeprazole-suppressed-plasma-magnesium-level-and-duodenal-magnesium-absorption-in-male-sprague-dawley-rats
#13
Narongrit Thongon, Jirawat Penguy, Sasikan Kulwong, Kanyanat Khongmueang, Matthana Thongma
Hypomagnesemia is the most concerned side effect of proton pump inhibitors (PPIs) in chronic users. However, the mechanism of PPIs-induced systemic Mg(2+) deficit is currently unclear. The present study aimed to elucidate the direct effect of short-term and long-term PPIs administrations on whole body Mg(2+) homeostasis and duodenal Mg(2+) absorption in rats. Mg(2+) homeostasis was studied by determining the serum Mg(2+) level, urine and fecal Mg(2+) excretions, and bone and muscle Mg(2+) contents. Duodenal Mg(2+) absorption as well as paracellular charge selectivity were studied...
November 2016: Pflügers Archiv: European Journal of Physiology
https://www.readbyqxmd.com/read/27855620/mrp1-dependent-collateral-sensitivity-of-multidrug-resistant-cancer-cells-identifying-selective-modulators-inducing-cellular-glutathione-depletion
#14
Doriane Lorendeau, Lauriane Dury, Rachad Nasr, Ahcène Boumendjel, Elisabetta Teodori, Michael Gütschow, Pierre Falson, Attilio Di Pietro, Hélène Baubichon-Cortay
Cancer cells are permanently being selected for survival and proliferation. During this process, tumor cells often co-opt basic physiological mechanisms to protect themselves from toxic chemotherapy. One of these mechanisms is the overexpression of ATP-binding cassette (ABC) drug efflux pumps leading to multidrug resistance (MDR) of cancer cells through an increase of drug efflux. In the past 20 years, many efforts were done to circumvent MDR through the inhibition of ABC transporters. A number of inhibitors of these transporters were found but are rarely specific or rationally developed...
November 18, 2016: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/27822201/a-tolc-like-protein-of-actinobacillus-pleuropneumoniae-is-involved-in-antibiotic-resistance-and-biofilm-formation
#15
Ying Li, Sanjie Cao, Luhua Zhang, Gee W Lau, Yiping Wen, Rui Wu, Qin Zhao, Xiaobo Huang, Qigui Yan, Yong Huang, Xintian Wen
Actinobacillus pleuropneumoniae is the etiologic agent of porcine contagious pleuropneumonia, a significant disease that causes serious economic losses to the swine industry worldwide. Persistent infections caused by bacterial biofilms are recalcitrant to treat because of the particular drug resistance of biofilm-dwelling cells. TolC, a key component of multidrug efflux pumps, are responsible for multidrug resistance (MDR) in many Gram-negative bacteria. In this study, we identified two TolC-like proteins, TolC1 and TolC2, in A...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27815466/fluorinated-beta-diketo-phosphorus-ylides-are-novel-efflux-pump-inhibitors-in-bacteria
#16
Annamária Kincses, Ágnes Míra Szabó, Ryosuke Saijo, Genki Watanabe, Masami Kawase, Joseph Molnár, Gabriella Spengler
BACKGROUND: One of the most important resistance mechanisms in bacteria is the increased expression of multidrug efflux pumps. To combat efflux-related resistance, the development of new efflux pump inhibitors is essential. MATERIALS AND METHODS: Ten phosphorus ylides were compared based on their MDR-reverting activity in multidrug efflux pump system consisting of the subunits acridine-resistance proteins A and B (AcrA and AcrB) and the multidrug efflux pump outer membrane factor TolC (TolC) of Escherichia coli K-12 AG100 strain and its AcrAB-TolC-deleted strain...
November 2016: In Vivo
https://www.readbyqxmd.com/read/27814643/cellular-efflux-transporters-and-the-potential-role-of-natural-products-in-combating-efflux-mediated-drug-resistance
#17
Muhammad Ayaz, Fazal Subhan, Abdul Sadiq, Farhat Ullah, Jawad Ahmed, Robert D E Sewell
Efflux mediated multidrug resistance (MDR) is a major problem in the treatment of bacterial, fungal and protozoal infections in addition to cancer chemotherapy. Among other well known mechanisms, efflux pumps are significant contributors to chemo-resistance. Efflux mediated resistance generally occurs through up-regulation of genes responsible for the expression of transporter proteins extruding drugs from the cell to create intracellular sub-therapeutic concentrations leading to resistance. The rapid expansion of MDR pathogens necessitates the discovery of resistance modifying drugs, which in combination with antimicrobial or chemotherapeutic agents would tend to reinstate the action of these drugs and avert the emergence of acquired resistance...
January 1, 2017: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/27810576/effects-of-pharmaceuticals-and-personal-care-products-ppcps-on-multixenobiotic-resistance-mxr-related-efflux-transporter-activity-in-zebrafish-danio-rerio-embryos
#18
V Cunha, K Burkhardt-Medicke, P Wellner, M M Santos, P Moradas-Ferreira, T Luckenbach, M Ferreira
Certain ATP binding cassette (ABC) transporter proteins, such as zebrafish Abcb4, are efflux pumps acting as a cellular defence against a wide range of different, potentially toxic chemical compounds thus mediating so called multixenobiotic resistance (MXR). Certain chemicals target MXR proteins and, as so called chemosensitisers, inhibit the activity of these proteins thus increasing the toxicity of other chemicals that would normally be effluxed. In this study 14 pharmaceuticals and personal care products (PPCPs) that are being increasingly detected in aquatic systems, were assessed for interference with the MXR system of zebrafish (Danio rerio)...
February 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27771990/spectroscopic-and-molecular-modeling-approaches-to-investigate-the-binding-of-proton-pump-inhibitors-to-human-serum-albumin
#19
Suma K Pawar, Reeta Punith, Roopa S Naik, J Seetharamappa
The interaction between two proton pump inhibitors viz., omeprazole (OME) and esomeprazole (EPZ) with human serum albumin (HSA) was studied by fluorescence, absorption, circular dichroism (CD), fourier transform infrared spectroscopy (FT-IR), voltammetry and molecular modeling approaches. The Stern-Volmer quenching constants (Ksv) for OME-HSA and EPZ-HSA systems obtained at different temperatures revealed that both OME and EPZ quenched the intensity of HSA through dynamic mode of quenching mechanism. The binding constants of OME-HSA and EPZ-HSA increased with temperature, indicating the increased stability of these systems at higher temperatures...
October 24, 2016: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/27769859/chop-deficiency-inhibits-methylglyoxal-induced-endothelial-dysfunction
#20
Yoon Young Choi, Suji Kim, Jung-Hwa Han, Dae-Hwan Nam, Kwon Moo Park, Seong Yong Kim, Chang-Hoon Woo
Epidemiological studies suggested that diabetic patients are susceptible to develop cardiovascular complications along with having endothelial dysfunction. It has been suggested that methylglyoxal (MGO), a glycolytic metabolite, has more detrimental effects on endothelial dysfunction rather than glucose itself. Here, we investigated the molecular mechanism by which MGO induces endothelial dysfunction via the regulation of ER stress. Biochemical data showed that 4-PBA significantly inhibited MGO-induced protein cleavages of PARP-1 and caspase-3...
October 18, 2016: Biochemical and Biophysical Research Communications
keyword
keyword
30249
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"