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https://www.readbyqxmd.com/read/28544042/forced-degradation-studies-of-lansoprazole-using-lc-esi-hrms-and-1-h-nmr-experiments-in-vitro-toxicity-evaluation-of-major-degradation-products
#1
G Shankar, R M Borkar, S Udutha, L Guntuku, V G M Naidu, N Nagesh, R Srinivas
Regulatory agencies from all over the world have set up stringent guidelines with regard to drug degradation products due to their toxic effects or carcinogenicity. Lansoprazole, a proton-pump inhibitor, was subjected to forced degradation studies as per ICH guidelines Q1A (R2). The drug was found to degrade under acidic, basic, neutral hydrolysis and oxidative stress conditions, whereas it was found to be stable under thermal and photolytic conditions. The chromatographic separation of the drug and its degradation products were achieved on a Hiber Purospher, C18 (250 X 4...
May 20, 2017: Journal of Mass Spectrometry: JMS
https://www.readbyqxmd.com/read/28532623/improving-the-standard-sequential-treatment-of-helicobacter-pylori-with-either-extended-treatment-or-by-adding-bismuth
#2
Zehra Akpinar, Sinan Akay, Belkis Unsal
BACKGROUND AND STUDY AIMS: Standard sequential treatment for Helicobacter pylori (H. pylori) eradication has less success because of increasing clarithromycin resistance. Extended treatment and bismuth containing regimens were, therefore, investigated. PATIENTS AND METHODS: Consecutive H. pylori-positive patients with dyspepsia were randomly allocated to one of the three sequential regimens: The first group was given lansoprazole 30mg b.i.d. plus amoxicillin 1g b...
May 19, 2017: Arab Journal of Gastroenterology: the Official Publication of the Pan-Arab Association of Gastroenterology
https://www.readbyqxmd.com/read/28530283/composite-cd-mof-nanocrystals-containing-microspheres-for-sustained-drug-delivery
#3
Haiyan Li, Nana Lv, Xue Li, Botao Liu, Jing Feng, Xiaohong Ren, Tao Guo, Dawei Chen, J Fraser Stoddart, Ruxandra Gref, Jiwen Zhang
Metal-organic frameworks (MOFs), which are typically embedded in polymer matrices as composites, are emerging as a new class of carriers for sustained drug delivery. Most of the MOFs and the polymers used so far in these composites, however, are not pharmaceutically acceptable. In the investigation reported herein, composites of γ-cyclodextrin (γ-CD)-based MOFs (CD-MOFs) and polyacrylic acid (PAA) were prepared by a solid in oil-in-oil (s/o/o) emulsifying solvent evaporation method. A modified hydrothermal protocol has been established which produces efficiently at 50 °C in 6 h micron (5-10 μm) and nanometer (500-700 nm) diameter CD-MOF particles of uniform size with smooth surfaces and powder X-ray diffraction patterns that are identical with those reported in the literature...
May 22, 2017: Nanoscale
https://www.readbyqxmd.com/read/28512025/synthesis-of-methanesulphonamido-benzimidazole-derivatives-as-gastro-sparing-antiinflammatory-agents-with-antioxidant-effect
#4
Ratika Sharma, Alka Bali, Bhim Bahadur Chaudhari
A series of 5-methanesulphonamido benzimidazole derivatives were designed by combining the structural features of clinically useful anti-inflammatory drugs (nimesulide and rofecoxib) and antiulcer drugs (lansoprazole, omeprazole, etc.) based on physicochemical and 3D similarity studies. The compounds were evaluated for their anti-inflammatory activity in carrageenan induced rat paw edema model taking rofecoxib and indomethacin as standard drugs. In vitro antioxidant activity of the compounds was assessed by potassium ferricyanide reducing power (PFRAP) assay...
May 6, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28449104/liquid-chromatographic-chemometric-techniques-for-the-simultaneous-hplc-determination-of-lansoprazole-amoxicillin-and-clarithromycin-in-commercial-preparation
#5
A Hakan Aktas, Ayse Mine Saridag
Two multivariate calibration-prediction techniques, principal component regression (PCR) and partial least-squares regression (PLSR) were applied to the chromatographic multicomponent analysis of the drug containing lansoprazole (LAN), clarithromycin (CLA) and amoxicillin (AMO). Optimum chromatographic separation of LAN, CLA and AMO with atorvastatin as the internal standard (IS) was obtained by using Xterra® RP18 column 5 μm 4.6 × 250 mm2, and 25 mM ammonium chloride buffer prepared ammonium chloride, acetonitrile and bidistilled water (45:45:10 v/v) as the mobile phase at flow rate 1...
April 26, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28442261/identification-of-a-novel-fluoropyrrole-derivative-as-a-potassium-competitive-acid-blocker-with-long-duration-of-action
#6
Haruyuki Nishida, Yasuyoshi Arikawa, Keizo Hirase, Toshihiro Imaeda, Nobuhiro Inatomi, Yasunobu Hori, Jun Matsukawa, Yasushi Fujioka, Teruki Hamada, Motoo Iida, Mitsuyoshi Nishitani, Akio Imanishi, Hideo Fukui, Fumio Itoh, Masahiro Kajino
With the aim to find a novel long-lasting potassium-competitive acid blocker (P-CAB) that would perfectly overcome the limitations of proton pump inhibitors (PPIs), we tried various approaches based on pyrrole derivative 1b as a lead compound. As part of a comprehensive approach to identification of a new drug, we explored excellent compounds that have low lipophilicity by introducing a polar hetero-aromatic group at position 5 of the pyrrole ring. Among the compounds synthesized, fluoropyrrole derivative 37c, which has a 2-F-3-Py group at the fifth position, lower pKa, and much lower ClogP and logD values than 1b dose, showed potent gastric-acid suppressive action resulting from gastric H(+),K(+)-ATPase inhibition in animal models...
April 13, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/28412091/lansoprazole-halts-contrast-induced-nephropathy-through-activation-of-nrf2-pathway-in-rats
#7
Sahar A Khaleel, Amany A Alzokaky, Nahed A Raslan, Asmaa I Alwakeel, Heba G Abd El-Aziz, Adel R Abd-Allah
Contrast-induced nephropathy (CIN) is an important cause of acute kidney injury characterized by significant mortality and morbidity. To date, there is no successful protective regimen for CIN especially in poor kidney function patients. Lansoprazole has been shown to exert antioxidant action through induction of nuclear factor-erythroid 2-related factor 2 (Nrf2) pathway. The aim of the present study is to investigate the potential of lansoprazole to activate Nrf2 pathway in the kidney and consequently to protect against oxidative stress induced by iodinated contrast media...
May 25, 2017: Chemico-biological Interactions
https://www.readbyqxmd.com/read/28403034/national-study-of-off-label-proton-pump-inhibitor-use-among-new-zealand-infants-in-the-first-year-of-life-2005-2012
#8
Mei-Ling Blank, Lianne Parkin
OBJECTIVE: Off-label prescribing of proton pump inhibitors (PPIs) to infants to treat symptoms attributed to gastroesophageal reflux disease (GERD) is widely reported, despite evidence that PPIs are no more effective than placebo in relieving those symptoms. To initiate discussion about appropriate prescribing of these drugs for infants, we describe the characteristics of PPI use among infants in New Zealand. METHODS: In this population-based study we used routinely collected dispensing data to identify all children born between 2005 and 2012 who were dispensed a government-subsidized PPI (omeprazole, lansoprazole, pantoprazole) before their first birthday...
April 11, 2017: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/28379012/phase-transfer-and-ion-pairing-catalysis-of-pentanidiums-and-bisguanidiniums
#9
Lili Zong, Choon-Hong Tan
Catalysts accelerate biological processes and organic reactions in a controlled and selective fashion. There are continuing efforts in asymmetric catalysis to develop efficient catalysts with broad reaction scope and industrial practicability. Among the various modes of asymmetric catalysis, phase-transfer catalysis has attracted intense interest due to its facile scale up and low catalyst loading. Chiral quaternary ammonium and phosphonium salts are well-studied classes of chiral phase-transfer catalysts, and they are typically composed of sp(3)-hybridized quaternary onium salts...
April 5, 2017: Accounts of Chemical Research
https://www.readbyqxmd.com/read/28353592/the-effect-of-mdr1-c3435t-polymorphism-on-the-eradication-rate-of-h-pylori-infection-in-ppi-based-triple-therapy-a-meta-analysis
#10
Meng Li, Taijie Li, Shihui Guo, Hongjie Liang, Dunke Jiang
BACKGROUND: Several studies have reported that multidrug resistance gene 1 (MDR1) C3435T polymorphism was associated with the rate of Helicobacter pylori (H. pylori) eradication in proton pump inhibitor (PPI)-based triple therapy. However, the conclusions were inconsistent. Therefore, this meta-analysis was conducted to evaluate the impact of MDR1 C3435T polymorphism on H. pylori eradication by PPI-based triple therapy. METHODS: Seven eligible studies published up to August 2016 and including 1019 patients were identified by searching the Chinese Biomedical Literature database, Wan fang, PubMed, and the Web of Science electronic databases...
March 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28349044/vonoprazan-based-regimen-is-more-useful-than-ppi-based-one-as-a-first-line-helicobacter-pylori-eradication-a-randomized-controlled-trial
#11
Masafumi Maruyama, Naoki Tanaka, Daisuke Kubota, Masayuki Miyajima, Takefumi Kimura, Koujiro Tokutake, Ryujiro Imai, Toru Fujisawa, Hiromitsu Mori, Yoshiaki Matsuda, Shuichi Wada, Akira Horiuchi, Kendo Kiyosawa
Background. A new agent, potassium-competitive acid blocker vonoprazan (VPZ) has potent acid-inhibitory effects and may offer advantages over conventional H. pylori eradication therapies. We aimed to compare the eradication rate between VPZ-based treatment and PPI-based one. Methods. This randomized controlled trial was designed to assign 141 patients with H. pylori-positive gastritis to VPZ group (VPZ 20 mg, amoxicillin 750 mg, and clarithromycin 200 or 400 mg twice daily for 7 days) or PPI group (rabeprazole 20 mg or lansoprazole 30 mg, amoxicillin 750 mg, and clarithromycin 200 or 400 mg twice daily for 7 days)...
2017: Canadian Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28340819/influence-of-proton-pump-inhibitors-on-mycophenolic-acid-pharmacokinetics-in-patients-with-renal-transplantation-and-the-relationship-with-cytochrome-2c19-gene-polymorphism
#12
H S Ciftci, M S Karadeniz, T Tefik, Y Caliskan, H Yazıcı, E Demir, A Turkmen, I Nane, F S Oguz, F Aydin
BACKGROUND: Most patients have serious digestive complications after renal transplantation. Therefore, it is important to protect gastrointestinal function to improve the survival rate of transplant patients. Proton pump inhibitors (PPIs) such as lansoprazole and rabeprazole are widely administered to renal transplant patients with mycophenolic acid (MPA) in the perioperative period. PPIs are metabolized by cytochrome (CYP) 2C19 enzymes. Mycophenolate sodium (MYF) and mycophenolate mofetil (MMF) have been used in immunosuppression...
April 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28314392/combining-simplicity-with-cost-effectiveness-investigation-of-potential-counterfeit-of-proton-pump-inhibitors-through-simulated-formulations-using-thin-layer-chromatography
#13
Nejal M Bhatt, Vijay D Chavada, Mallika Sanyal, Pranav S Shrivastav
A simple, accurate and precise high-performance thin-layer chromatographic method has been developed and validated for the analysis of proton pump inhibitors (PPIs) and their co-formulated drugs, available as binary combination. Planar chromatographic separation was achieved using a single mobile phase comprising of toluene: iso-propranol: acetone: ammonia 5.0:2.3:2.5:0.2 (v/v/v/v) for the analysis of 14 analytes on aluminium-backed layer of silica gel 60 FG254. Densitometric determination of the separated spots was done at 290nm...
November 18, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28294071/safety-of-one-week-first-line-standard-triple-therapy-for-helicobacter-pylori-eradication-in-a-japanese-population
#14
Kazutoshi Hori, Tetsuya Takagawa, Nobuyuki Hida, Shiro Nakamura
BACKGROUND: Standard triple therapy with the proton pump inhibitors, clarithromycin and amoxicillin for Helicobacter pylori infection is considered to be safe; however, the development of significant adverse events (AEs), such as skin rashes, has been reported. OBJECTIVE: To reconfirm the safety of this treatment. METHODS: This was a retrospective cohort study. After the exclusion of patients allergic to penicillin, 322 consecutive patients, consisting of 305 outpatients and 17 inpatients, had received the first-line eradication treatment with lansoprazole (30 mg), clarithromycin (200 mg), and amoxicillin (750 mg) twice daily for 7 days...
March 9, 2017: Current Drug Safety
https://www.readbyqxmd.com/read/28291036/potential-mechanisms-of-hematological-adverse-drug-reactions-in-patients-receiving-clozapine-in-combination-with-proton-pump-inhibitors
#15
Michał Wiciński, Mateusz M Węclewicz, Mateusz Miętkiewicz, Bartosz Malinowski, Elżbieta Grześk, Joanna Klonowska
Clozapine is a second-generation antipsychotic which has proven efficacy in treating the symptoms of schizophrenia. Although clozapine therapy is associated with a number of adverse drug reactions, it is frequently used. One of the most common adverse drug reactions is gastroesophageal reflux disease which is an indication for treatment with proton pump inhibitors (PPIs). Coadministration of clozapine and PPIs increases the risk of hematological adverse drug reactions, including neutropenia and agranulocytosis...
March 2017: Journal of Psychiatric Practice
https://www.readbyqxmd.com/read/28258931/the-effects-of-paroxetine-and-amitriptyline-on-the-upper-esophageal-sphincter-ues-pressure-and-its-natural-history-in-globus-pharyngeus
#16
Wen-Cong Zhou, Lin Jia, Dong-Yun Chen, Yao Liu, Jing Liu, Shu-Man Jiang, Meng Yang, Jian Xu
BACKGROUND: Antidepressant agents have been shown to be an effective and safe treatment method for patients with globus. However, there are few clinical trials dedicated to studying the effects of antidepressant agents on the natural history and upper oesophageal sphincter (UES) pressure of treated globus patients. AIMS: To evaluate the effect of paroxetine and amitriptyline to prevent relapses in patients with globus, the simultaneous relationship between changes in UES pressure and improvement of globus symptoms were measured...
February 28, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28251024/petroselinum-crispum-is-effective-in-reducing-stress-induced-gastric-oxidative-damage
#17
Ayşin Akıncı, Mukaddes Eşrefoğlu, Elif Taşlıdere, Burhan Ateş
BACKGROUND: Oxidative stress has been shown to play a principal role in the pathogenesis of stress-induced gastric injury. Parsley (Petroselinum crispum) contains many antioxidants such as flavanoids, carotenoids and ascorbic acid. AIMS: In this study, the histopathological and biochemical results of nutrition with a parsley-rich diet in terms of eliminating stress-induced oxidative gastric injury were evaluated. STUDY DESIGN: Animal experimentation...
January 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28216974/comparative-study-vonoprazan-and-proton-pump-inhibitors-in-helicobacter-pylori-eradication-therapy
#18
Kouichi Sakurai, Hiroko Suda, Yumi Ido, Takayuki Takeichi, Ayako Okuda, Kiwamu Hasuda, Masahiro Hattori
AIM: To compare the effectiveness and safety of vonoprazan-based therapy with proton pump inhibitor (PPI)-based therapies to treat Helicobacter pylori (H. pylori). METHODS: We retrospectively analysed data from first-line (vonoprazan or PPI with 200 mg clarithromycin and 750 mg amoxicillin twice daily for 7 d) (n = 1353) and second-line (vonoprazan or PPI with 250 mg metronidazole and 750 mg amoxicillin twice daily for 7 d) (n = 261) eradication treatments for H...
January 28, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28203282/the-role-of-dexlansoprazole-modified-release-in-the-management-of-gastroesophageal-reflux-disease
#19
REVIEW
Ronnie Fass, Rosita Frazier
Dexlansoprazole modified-release (MR) is the R-enantiomer of lansoprazole and is currently the only proton-pump inhibitor (PPI) with a novel dual delayed release (DDR) formulation. Overall, dexlansoprazole MR demonstrates a similar safety and side-effect profile as lansoprazole. Dexlansoprazole MR has been shown to be highly efficacious in healing erosive esophagitis, maintaining healed esophageal mucosa in patients with erosive esophagitis and controlling symptoms of patients with nonerosive reflux disease (NERD)...
February 2017: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/28197557/doubly-charged-trimeric-cluster-ions-effective-in-mutual-chiral-recognition-of-tadalafil-and-three-proton-pump-inhibitors
#20
Lu Wang, Yunfeng Chai, Wenquan Zhu, Yuanjiang Pan, Cuirong Sun, Su Zeng
Mutual chiral recognition of four stereoisomers of tadalafil and three pairs of enantiomers of proton pump inhibitors (PPIs) including pantoprazole, lansoprazole, and omeprazole, as well as quantitative analysis of enantiomeric excess is achieved on the basis of the competitive fragmentation of doubly charged trimeric Ni(II) cluster ions. Compared with a singly charged trimeric cluster ion, a doubly charged trimeric cluster ion was proved efficient in the recognition of chiral drugs with one or multiple chiral centers, due to its rich fragmentation ions...
February 15, 2017: Analyst
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