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https://www.readbyqxmd.com/read/29145067/role-of-thalamic-ventral-posterolateral-nucleus-histamine-h2-and-opiate-receptors-in-modulation-of-formalin-induced-muscle-pain-in-rats
#1
Hamid Ghasemi, Esmaeal Tamaddonfard, Farhad Soltanalinejad
BACKGROUND: Histamine and opiate systems contribute to supraspinal processing of pain. In the present study, we investigated the effects of microinjection of histamine and agonists and antagonists of histamine H2 and opiate receptors into the thalamic ventral posterolateral nucleus on muscle pain in rats. METHODS: The thalamic ventral posterolateral nuclei were bilaterally implanted with two guide cannulas. Muscle pain was induced by intramuscular injection of a diluted formalin solution (2...
May 8, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29132544/histaminergic-receptors-modulate-spinal-cord-injury-induced-neuronal-nitric-oxide-synthase-upregulation-and-cord-pathology-new-roles-of-nanowired-drug-delivery-for-neuroprotection
#2
Hari S Sharma, Ranjana Patnaik, Dafin F Muresanu, José V Lafuente, Asya Ozkizilcik, Z Ryan Tian, Ala Nozari, Aruna Sharma
The possibility that histamine influences the spinal cord pathophysiology following trauma through specific receptor-mediated upregulation of neuronal nitric oxide synthase (nNOS) was examined in a rat model. A focal spinal cord injury (SCI) was inflicted by a longitudinal incision into the right dorsal horn of the T10-11 segments. The animals were allowed to survive 5h. The SCI significantly induced breakdown of the blood-spinal cord barrier to protein tracers, reduced the spinal cord blood flow at 5h, and increased the edema formation and massive upregulation of nNOS expression...
2017: International Review of Neurobiology
https://www.readbyqxmd.com/read/29128794/baicalin-protects-against-gastroduodenal-ulcers-via-the-modulation-of-nrf2-expression-experimental-biochemical-and-histological-analyses
#3
Tao Zhang, Dong Yang, Xiangyu Meng
BACKGROUND: The present study aimed to determine the mechanisms underlying the gastroprotective effects of baicalin using several animal models of chemically induced gastric ulcers. METHODS: The gastroprotective effects of baicalin against ulcers induced by water immersion stress, alcohol-induced ligation, and indomethacin-induced pylorus ligation were assessed in the present study. Additionally, macroscopic evaluations were performed at the completion of the study and Western blot analyses of Nrf2 were conducted to determine the possible mechanisms of action underlying the effects of baicalin...
July 8, 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/29121900/synergistic-gastroprotective-activity-of-methanolic-extract-of-a-mixture-of-melastoma-malabathricum-and-muntingia-calabura-leaves-in-rats
#4
Siti Zawanah Halim, Zainul Amiruddin Zakaria, Maizatul Hasyima Omar, Norhafizah Mohtarrudin, Ikarastika Rahayu Abdul Wahab, Muhammad Nazrul Hakim Abdullah
BACKGROUND: Melastoma malabathricum L. (family Melastomaceae; MM) and Muntingia calabura L. (family Elaeocarpaceae; MC) have been separately reported to possess gastroprotective activity. In an attempt to develop a pharmaceutical product with antiulcer potential, the synergistic gastroprotective activity of methanolic extract of a mixture of MM and MC (MMMC) at various ratios was evaluated in rat models. METHODS: Rats were pre-treated orally with 2% Tween 80 (vehicle), 100 mg/kg ranitidine (reference drug) or MMMC (ratios of 1:1, 1:3 and 3:1 (v/v); doses of 15, 150 or 300 mg/kg) and then subjected to the ethanol-induced gastric ulcer or pyloric ligation assays...
November 9, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/29115998/effect-of-gastric-acid-suppressive-therapy-and-biological-variation-of-serum-gastrin-concentrations-in-dogs-with-chronic-enteropathies
#5
Romy M Heilmann, Nora Berghoff, Niels Grützner, Nolie K Parnell, Jan S Suchodolski, Jörg M Steiner
BACKGROUND: Serum gastrin concentration can help diagnose gastrinomas in dogs if >3-10× the upper reference limit (URL), but antisecretory therapy and other conditions can also cause hypergastrinemia. Effects of antisecretory therapy (famotidine or ranitidine, omeprazole) on serum gastrin concentration in dogs with chronic enteropathy (CE) and its biological variation (BV) are unknown. Aim of the study was to evaluate serum gastrin in acid-suppressant-treated or -naïve CE dogs; test the association between serum gastrin and histopathologic findings in acid-suppressant-naïve CE dogs; and evaluate the BV of serum gastrin in dogs not receiving any gastric acid suppressive therapy...
November 7, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29102410/dress-syndrome-induced-by-ranitidine
#6
Timothy J Watts, Rubaiyat Haque
No abstract text is available yet for this article.
October 25, 2017: Journal of Allergy and Clinical Immunology in Practice
https://www.readbyqxmd.com/read/29100966/the-detection-and-quantification-in-vivo-and-in-real-time-of-hydrogen-sulfide-in-ethanol-induced-lesions-in-rat-stomachs-using-an-ion-sensitive-electrode
#7
Josué A Velázquez-Moyado, Andrés Navarrete
INTRODUCTION: The development of electrochemical sensors for the detection of small molecules has already had a significant effect on the study of biology because of their selectivity and ability to measure low concentrations of small molecules that regulate various functions in living organisms. Hydrogen sulfide (H2S) is a gasotransmitter produced at low levels in several tissues including the stomach. Here, we propose a new method for detecting low concentrations of this transmitter in the rat stomach, in-vivo and in real time, with applications in pharmacology and physiology...
October 31, 2017: Journal of Pharmacological and Toxicological Methods
https://www.readbyqxmd.com/read/29070274/long-term-omalizumab-use-in-the-treatment-of-exercise-induced-anaphylaxis
#8
Mark R Peterson, Christopher A Coop
Reported is a case of a 39-year-old male who was diagnosed with exercise-induced anaphylaxis (EIA). He was initially treated prophylactically with fexofenadine, montelukast, and ranitidine. He also used an epinephrine autoinjector as needed. He was refractory to these medications and continued to have episodes of EIA. He was then started on a trial of omalizumab, an immunoglobulin E monoclonal antibody, and had resolution of the EIA episodes. After discontinuation of the omalizumab, the EIA episodes returned...
October 1, 2017: Allergy & Rhinology
https://www.readbyqxmd.com/read/29068472/factors-affecting-the-dissipation-of-pharmaceuticals-in-freshwater-sediments
#9
Omar S A Al-Khazrajy, Ed Bergström, Alistair B A Boxall
Degradation is one of the key processes governing the impact of pharmaceuticals in the aquatic environment. Most studies on the degradation of pharmaceuticals have focused on soil and sludge with fewer exploring persistence in aquatic sediments. Here we investigate the dissipation of six pharmaceuticals from different therapeutic classes in a range of sediment types. Dissipation of each pharmaceutical was found to follow first-order exponential decay. Half-lives in the sediments ranged from 9.5 d (atenolol) to 78...
October 25, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/29044014/-anaphylaxis-and-allergic-reactions-during-surgery-and-medical-procedures
#10
Blas J Larrauri, María Gabriela Torre, Eloísa Malbrán, María Cecilia Juri, Diego S Fernández Romero, Alejandro Malbrán
Anaphylaxis during anesthesia is an unpredictable, severe, and rare reaction. It has an incidence of 1/10 000 to 1/20 000 surgeries. In most series, the responsible drugs include neuromuscular blocking agents, latex, or antibiotics. The frequency and etiology of systemic allergic reactions in other medical procedures are largely unknown. The identification of responsible drugs of anaphylaxis is a complex task, requiring testing of all medications and substances used during surgery. We describe our experience in a retrospective study of 15 patients...
2017: Medicina
https://www.readbyqxmd.com/read/29032675/carbon-hydrogen-and-nitrogen-isotope-fractionation-trends-in-n-nitrosodimethylamine-reflect-the-formation-pathway-during-chloramination-of-tertiary-amines
#11
Stephanie Spahr, Urs von Gunten, Thomas B Hofstetter
Assessing the precursors and reactions leading to the carcinogenic N-nitrosodimethylamine (NDMA) during drinking water disinfection is a major challenge. Here, we investigate whether changes of 13C/12C, 2H/1H, and 15N/14N ratios of NDMA give rise to isotope fractionation trends that can be used to infer NDMA formation pathways. We carried out compound-specific isotope analysis (CSIA) of NDMA during chloramination of four tertiary amines that produce NDMA at high yields, namely ranitidine, 5-(dimethylaminomethyl)furfuryl alcohol, N,N-dimethylthiophene-2-methylamine and N,N-dimethylbenzylamine...
October 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28991940/posttraumatic-stress-disorder-often-missed-in-primary-care
#12
Adrienne A Williams
DeSean W, a 47-year-old man, returned to his primary care clinic with a new complaint of epigastric burning that had been bothering him for the past 4 months. He had tried several over-the-counter remedies, which provided no relief. He also remained concerned--despite assurances to the contrary at previous clinic visits--that he had contracted a sexually-transmitted disease (STD) after going to a bar one night 4 to 5 months ago. At 2 other clinic visits since that time, STD test results were negative. At this current visit, symptoms and details of sexual history were unchanged since the last visit, with the exception of the epigastric pain...
October 2017: Journal of Family Practice
https://www.readbyqxmd.com/read/28983943/delayed-methotrexate-elimination-incidence-interaction-with-antacid-drugs-and-clinical-consequences
#13
Florence Ranchon, Nicolas Vantard, Emilie Henin, Emmanuel Bachy, Clémentine Sarkozy, Lionel Karlin, Fadhela Bouafia-Sauvy, Aurore Gouraud, Verane Schwiertz, Estelle Bourbon, Amandine Baudouin, Anne Gaelle Caffin, Thierry Vial, Gilles Salles, Catherine Rioufol
The aim of this retrospective cohort study was to investigate the incidence of delayed methotrexate elimination in patients treated with high-dose methotrexate (≥1 g/m(2) ) for haematological malignancy and to identify the impact of interacting drugs, especially proton-pump inhibitors (PPIs) and ranitidine. All patients treated with high-dose methotrexate over a 6 year period in the haematology department of the Lyon Sud University Hospital (Hospices Civils de Lyon, France) were included. Potential risk factors for delayed methotrexate elimination were tested in a generalized linear model by univariate analysis: patient age, gender, methotrexate dose, administration of PPI or ranitidine, and concomitant nephrotoxic drugs...
October 6, 2017: Hematological Oncology
https://www.readbyqxmd.com/read/28976570/renal-transplant-acute-rejection-with-lower-mycophenolate-mofetil-dosing-and-proton-pump-inhibitors-or-histamine-2-receptor-antagonists
#14
Kajal S Patel, Brian R Stephany, Julie F Barnes, Seth R Bauer, Michael L Spinner
BACKGROUND: Pharmacokinetic data show reduced mycophenolic acid levels in renal transplant recipients taking mycophenolate mofetil (MMF) and proton pump inhibitors (PPIs) concomitantly. This reduced exposure could increase rejection risk. The typical initial MMF dose post-renal transplant is 2 g daily, which often requires dose reduction secondary to side effects. Existing studies have not shown significant acute rejection differences for patients taking MMF-PPI versus MMF-ranitidine...
October 4, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28967681/ranitidine-induced-black-tongue-a-case-report
#15
Meltem Akcaboy, Sanliay Sahin, Pelin Zorlu, Saliha Şenel
Black tongue is a rare, benign, self-limiting disorder caused by certain conditions and some medications. We report the first case of a child diagnosed with black tongue associated with ranitidine use. We report our case to emphasize the rare side effect of this frequently used drug. Health care professionals should be aware of the likelihood of ranitidine-induced black tongue in clinical practice.
October 2, 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28962836/effect-of-mutation-of-phe-243-6-ar-of-the-histamine-h2-receptor-on-cimetidine-and-ranitidine-mechanism-of-action
#16
Granja-Galeano Gina, Zappia Carlos Daniel, Lucas Fabián, Davio Carlos, Shayo Carina, Fernández Natalia, Monczor Federico
Despite the pivotal role GPCRs play in cellular signaling, it is only in the recent years that structural biology has begun to elucidate how GPCRs function and to provide a platform for structure-based drug design. It is postulated that GPCR activation involves the movement of transmembrane helices. The finding that many residues, which have been shown to be critical for receptor activation and are highly conserved among different GPCRs, are clustered in particular positions of transmembrane helices suggests that activation of GPCRs may involve common molecular mechanisms...
September 26, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28954042/antisecretory-treatment-for-pediatric-gastroesophageal-reflux-disease-a-systematic-review
#17
Ângelo Zambam de Mattos, Gabriela Meirelles Marchese, Bárbara Brum Fonseca, Carlos Kupski, Marta Brenner Machado
BACKGROUND: Proton pump inhibitors and histamine H2 receptor antagonists are two of the most commonly prescribed drug classes for pediatric gastroesophageal reflux disease, but their efficacy is controversial. Many patients are treated with these drugs for atypical manifestations attributed to gastroesophageal reflux, even that causal relation is not proven. OBJECTIVE: To evaluate the use of proton pump inhibitors and histamine H2 receptor antagonists in pediatric gastroesophageal reflux disease through a systematic review...
September 21, 2017: Arquivos de Gastroenterologia
https://www.readbyqxmd.com/read/28939039/hyperosmolarity-evokes-histamine-release-from-ileum-mucosa-by-stimulating-a-cholinergic-pathway
#18
Banqin Wang, Ning An, Abdul Sami Shaikh, Haoyi Wang, Ling Xiao, Hongwei Liu, Jingxin Li, Dongbo Zhao
Changes in extracellular osmolarity lead to alteration in cellular volume. In the study, we examined the effects of hyperosmolarity on short-circuit currents (Isc) in the rat ileum using the Ussing chamber technique. Mucosal exposure to 20 mM glucose evoked a decrease of ISC in the rat ileum, which was antagonized by the stretch-activated channel blocker GdCl3, TTX and atropine, respectively. In contrast, it was not blocked by phlorizin, a Na(+)-glucose cotransporter SGLT1 inhibitor. Furthermore, the unabsorbed substances, such as sucrose, lactulose or urea, also induced a decrease of ISC in rat ileum...
November 18, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28916845/pharmacological-investigations-on-mast-cell-stabilizer-and-histamine-receptor-antagonists-in-vincristine-induced-neuropathic-pain
#19
Amteshwar Singh Jaggi, Gunjanpreet Kaur, Anjana Bali, Nirmal Singh
The present study was designed to investigate the role of mast cells and mast cell-derived histamine in vincristine-induced neuropathic pain. Neuropathic pain was induced by administration of vincristine (100 μg/kg, i.p.) over a period of 10 days, with a break of 2 days, and pain behavioural estimations including pin prick, hot plate and acetone spray tests were performed to assess mechanical and heat hyperalgesia and cold allodynia, respectively, on days 0, 14 and 28. Mast cell stabilizer, sodium cromoglycate, H1 receptor antagonist promethazine and H2 receptor antagonist ranitidine were administered over a period of 12 days...
November 2017: Naunyn-Schmiedeberg's Archives of Pharmacology
https://www.readbyqxmd.com/read/28901635/investigation-and-management-of-gastro-oesophageal-reflux-in-united-kingdom-neonatal-intensive-care-units
#20
Thomas Rossor, Gwendolyn Andradi, Ravindra Bhat, Anne Greenough
AIM: In 2004 wide variation in the investigation and management of gastro-oesophageal reflux (GOR) of infants on UK major neonatal units was demonstrated. Our aim was to re-survey neonatal practitioners to determine current practice and whether it was now evidence based. METHODS: A questionnaire was sent to all 207 UK neonatal units. RESULTS: Responses were obtained from 84% of units. The most frequent "investigation" was a trial of therapy (83% of units); pH studies were used in 38%, upper GI contrast studies in 19% and multichannel intraluminal impedance (MII)/pH studies in 5%...
September 13, 2017: Acta Paediatrica
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