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Ketotifen

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https://www.readbyqxmd.com/read/28584400/compound-48-80-a-mast-cell-degranulator-causes-oxidative-damage-by-enhancing-vitamin-c-synthesis-via-reduced-glutathione-depletion-and-lipid-peroxidation-through-neutrophil-infiltration-in-rat-livers
#1
Yosihiji Ohta, Koji Yashiro, Koji Ohashi, Yosuke Horikoshi, Chiaki Kusumoto, Tatsuya Matsura
In this study, we examined whether compound 48/80 (C48/80), a mast cell degranulator, causes hepatic oxidative damage in rats. Serum and liver biochemical parameters were determined 0.5, 3 or 6 h after a single treatment with C48/80 (0.75 mg/kg). Serum histamine and serotonin levels increased 0.5 h after C48/80 treatment but diminished thereafter. Increases in serum vitamin C (VC) and transaminases and hepatic hydrogen peroxide, lipid peroxide, and myeloperoxidase levels and a decrease in hepatic reduced glutathione level occurred 0...
May 2017: Journal of Clinical Biochemistry and Nutrition
https://www.readbyqxmd.com/read/28496459/fabrication-and-in-vitro-evaluation-of-ketotifen-fumarate-loaded-plga-nanoparticles-as-a-sustained-delivery-system
#2
Saieede Soltani, Parvin Zakeri-Milani, Mohammad Barzegar-Jalali, Mitra Jelvehgari
Ketotifen fumarate is a non-bronchodilator anti-asthmatic drug which inhibits the effects of certain endogenous substances known to be inflammatory mediators, and thereby exerts antiallergic activity. The present study describes the formulation of a sustained release nanoparticle (NP) drug delivery system containing ketoftifen, using poly (D,L lactide-co-glycolide) acid (PLGA). Biodegradable NPs were prepared using 50 : 50 PLGA by a water in-oil-in-water (w/o/w) double emulsion-solvent evaporation procedure and characterized for drug content, DSC (differential scanning calorimetry, XRD (X-ray diffractionl), FTIR (Fourier transform spectroscopy), particle size , surface morphology using scanning electron microscopy, and drug release rate...
2017: Iranian Journal of Pharmaceutical Research: IJPR
https://www.readbyqxmd.com/read/28352949/from-prescription-only-rx-to-over-the-counter-otc-status-in-germany-2006-2015-pharmacological-perspectives-on-regulatory-decisions
#3
Eva Barrenberg, Edeltraut Garbe
PURPOSE: Little is known about the extent of switches from prescription-only (Rx) to over-the-counter (OTC) status in Europe and about the pharmacological properties of the switched substances. The objectives of this study were to provide an overview of the substances that were switched from Rx to OTC status in Germany between 2006 and 2015 and to assess their pharmacological properties. METHODS: Session minutes of the German Expert Advisory Committee for Prescription-Only Issues, changes to the German Ordinance on Prescription-Only Medicines and the Summary of Product Characteristics of the switched substances were analysed...
March 28, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28336398/modulation-of-mammary-tumor-vascularization-by-mast-cells-ultrasonographic-and-histopathological-approaches
#4
Ana I Faustino-Rocha, Adelina Gama, Paula A Oliveira, Katrien Vanderperren, Jimmy H Saunders, Maria J Pires, Rita Ferreira, Mário Ginja
AIMS: The inhibition of mast cells' degranulation may be an approach to prevent the formation of new vessels during the mammary carcinogenesis. MATERIALS AND METHODS: Female Sprague-Dawley rats were randomly divided into five experimental groups. Mammary tumors were induced by intraperitoneal injection of N-methyl-N-nitrosourea (MNU). Animals from group II were treated with ketotifen for 18weeks immediately after the MNU administration, while animals from group III only received the ketotifen after the development of the first mammary tumor...
May 1, 2017: Life Sciences
https://www.readbyqxmd.com/read/28321031/role-of-ketotifen-on-metabolic-profiles-inflammation-and-oxidative-stress-in-diabetic-rats
#5
Zimiao Chen, Hongwei Sun, Jian Wang, Liansong Ni, Xuejiang Gu, Shengjie Ge, Qiong Chen, Liangshan Mu, Xingbo Cheng
We aim to explore effects of Ketotifen on metabolic profiles, inflammation and oxidative stress. Sprague Dawley (SD) male rats were randomly divided into normal control group (NC) and experimental groups, and experimental group rats were fed with high-sugar and fat diet for 6 weeks. Then, experimental group rats were divided into diabetes group (DM) and ketotifen treatment group (KT). KT group was given ketotifen via Intragastric for 8 weeks with the dosage of 0.09 mg/kg•d. Fasting plasma glucose (FPG) was measured using glucose oxidase-phenol amino phenazone method...
March 17, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28314259/mast-cells-in-mammary-carcinogenesis-host-or-tumor-supporters
#6
Ana I Faustino-Rocha, Adelina Gama, Maria J Neuparth, Paula A Oliveira, Rita Ferreira, Mário Ginja
BACKGROUND/AIM: The effects of mast cells on carcinogenesis is not yet fully understood. This work aimed to disclose the role of mast cells in mammary carcinogenesis in a rat model. MATERIALS AND METHODS: Mammary tumors were induced by the administration of N-methyl-N-nitrosourea (MNU) in three groups of rats. Animals from one group were treated with ketotifen immediately after MNU administration, and animals from another only received ketotifen after the development of the first mammary tumor...
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28299830/repeated-water-avoidance-stress-induces-visceral-hypersensitivity-role-of-il-1-il-6-and-peripheral-corticotropin-releasing-factor
#7
Tsukasa Nozu, Saori Miyagishi, Rintaro Nozu, Kaoru Takakusaki, Toshikatsu Okumura
BACKGROUND AND AIM: Repeated water avoidance stress (WAS) induces visceral hypersensitivity. Additionally, it is also known to activate corticotropin-releasing factor (CRF), mast cells and pro-inflammatory cytokines systems, but their precise roles on visceral sensation have not been determined definitely. The aim of the study was to explore this issue. METHODS: Abdominal muscle contractions induced by colonic balloon distention, i.e. visceromotor response (VMR) was detected electrophysiologically in conscious rats...
March 15, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28212251/serum-mast-cell-tryptase-as-a-marker-of-posttraumatic-joint-contracture-in-a-rabbit-model
#8
Michaela Kopka, Michael J Monument, A Dean Befus, Mei Zhang, David A Hart, Paul T Salo, Prism S Schneider, Cun-Yi Fan, Xiangdang Liang, Alexandra Garven, Kevin A Hildebrand
OBJECTIVES: Mast cells have been identified as key mediators of posttraumatic joint contracture, and stabilizing medications (ketotifen) have been shown to decrease contracture severity. Serum mast cell tryptase (SMCT) levels are used clinically to monitor mast cell-mediated conditions. The goals of this study were to determine if SMCT levels are elevated in the setting of joint contracture, if they can be decreased in association with ketotifen therapy, and if they correlate with contracture severity...
March 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28190755/quantitative-prediction-of-histamine-h1-receptor-occupancy-by-the-sedative-and-non-sedative-antagonists-in-the-human-central-nervous-system-based-on-systemic-exposure-and-preclinical-data
#9
Kayoko Kanamitsu, Yoshitane Nozaki, Yoko Nagaya, Yuichi Sugiyama, Hiroyuki Kusuhara
Significant histamine H1 receptor occupation in the central nervous system (CNS) is associated with sedation. Here we examined the time profiles of the H1 receptor occupancy (RO) in the CNS using sedative (diphenhydramine and ketotifen) and non-sedative (bepotastine and olopatadine) antagonists at their therapeutic doses by integrating in vitro and animal data. A pharmacokinetic model was constructed to associate plasma concentrations and receptor binding in the brain. Dissociation and association rate constants with the H1 receptor and plasma and brain unbound fractions were determined in vitro...
April 2017: Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28178593/the-role-of-histamine-in-the-regulation-of-the-viability-proliferation-and-transforming-growth-factor-%C3%AE-1-secretion-of-rat-wound-fibroblasts
#10
Monika Wolak, Ewa Bojanowska, Teresa Staszewska, Joanna Ciosek, Marlena Juszczak, Jacek Drobnik
BACKGROUND: Inflammation mediators play a regulatory role in repair processes. The study will examine the influence of histamine on wound fibroblast metabolic activity, viability, proliferation, and TGFβ1 secretion. The study also will identify the histamine receptor involved in regulation of the tested repair processes. METHODS: Fibroblasts were obtained from the granulation tissue of wounds or intact dermis of rats. The MTT and BrdU assays were used to examine the effect of histamine (10(-8)M-10(-4)M) on the viability and metabolic activity of fibroblasts, and on their proliferative capacity...
April 2017: Pharmacological Reports: PR
https://www.readbyqxmd.com/read/28173624/evidence-for-the-role-of-histaminergic-pathways-in-neuroprotective-mechanism-of-ischemic-postconditioning-in-mice
#11
Indresh Kaur, Amit Kumar, Amteshwar S Jaggi, Nirmal Singh
The present study has been designed to investigate the possible role of histaminergic pathway in neuroprotective mechanism of ischemic postconditioning (iPoCo). Bilateral carotid artery occlusion (BCAO) for 12 min followed by reperfusion for 24 hr was employed to produce I/R induced cerebral injury in NIH mice. iPoCo involving three episodes of carotid artery occlusion and reperfusion of 10 sec each, was instituted immediately after BCAO just before prolonged reperfusion. Cerebral infarct size was measured using triphenyltetrazolium chloride staining...
February 7, 2017: Fundamental & Clinical Pharmacology
https://www.readbyqxmd.com/read/28169851/periorbital-allergic-contact-dermatitis-due-to-ketotifen
#12
Kelly A Aschenbeck, Erin M Warshaw
No abstract text is available yet for this article.
March 2017: Dermatitis
https://www.readbyqxmd.com/read/28127315/relationship-between-different-types-and-forms-of-anti-asthmatic-medications-and-dental-caries-in-three-to-12-year-olds
#13
Alireza Heidari, Bahman Seraj, Mahdi Shahrabi, Hamideh Maghsoodi, Mohammad Javad Kharazifard, Tara Zarabian
OBJECTIVES: Asthma is a common chronic disease. Asthma and anti-asthmatic medications have been suggested as risk factors for increased susceptibility to caries. This study was conducted to evaluate the effects of different types and forms of antihistaminic medications and the duration of drug consumption on the severity of dental caries in asthmatic children. MATERIALS AND METHODS: This cross-sectional study was conducted in Asthma and Allergy Department of Children's Medical Center in Tehran, Iran...
August 2016: Journal of Dentistry of Tehran University of Medical Sciences
https://www.readbyqxmd.com/read/28095628/sensitization-from-ketotifen-fumarate-in-eye-drops-presenting-as-chronic-conjunctivitis
#14
Kyra Smets, Justine Werbrouck, An Goossens, Liesbeth Gilissen
No abstract text is available yet for this article.
February 2017: Contact Dermatitis
https://www.readbyqxmd.com/read/28009613/serum-mast-cell-tryptase-as-a-marker-of-post-traumatic-joint-contracture-in-a-rabbit-model
#15
Michaela Kopka, Michael J Monument, A Dean Befus, Mei Zhang, David A Hart, Paul T Salo, Prism S Schneider, Cun-Yi Fan, Xiangdang Liang, Alexandra Garven, Kevin A Hildebrand
OBJECTIVES: Mast cells have been identified as key mediators of post-traumatic joint contracture, and stabilizing medications (Ketotifen) have been shown to decrease contracture severity. Serum mast cell tryptase (SMCT) levels are used clinically to monitor mast cell-mediated conditions. The goals of this study were to determine if SMCT levels are elevated in the setting of joint contracture, if they can be decreased in association with Ketotifen therapy, and if they correlate with contracture severity...
November 7, 2016: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/27803886/bepotastine-induced-urticaria-cross-reactive-with-other-antihistamines
#16
Ju Wan Kang, Jaechun Lee
Second-generation antihistamines are widely prescribed for the control of symptoms of allergic inflammation such as itchy hives, coryza, and itchy eyes. In rare circumstances, these drugs might provoke allergic inflammation. Hypersensitivity to bepotastine besilate, a second-generation antihistamine has never been reported. A 17-year-old schoolgirl, whose paroxysmal itchy hives had been controlled with bepotastine, experienced aggravation of the hives. An oral provocation test confirmed her hypersensitivity to bepotastine and cross-reactivity to levocetirizine...
October 2016: Asia Pacific Allergy
https://www.readbyqxmd.com/read/27766218/comparison-of-different-nanosuspensions-as-potential-ophthalmic-delivery-systems-for-ketotifen-fumarate
#17
Saieede Soltani, Parvin Zakeri-Milani, Mohammad Barzegar-Jalali, Mitra Jelvehgari
Purpose: The objective of this study was to develop, characterize, and comparatively investigate the ketotifen fumarate (KF) nanosuspensions (NSS) to enhance the permeability of KF. Methods: In the present work, the NSP and NSE were prepared by double-emulsion solvent evaporation/nanoprecipitation methods with poly (D,Llactide-co-glycolide) and Eudragit RL100 polymers, respectively. The loading efficiency, particle size, and polydispersity index of prepared different NSs were evaluated with scanning electron microscopy (SEM), X-ray diffraction, differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and in vitro release and transcorneal permeation ...
September 2016: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27705841/human-dihydrofolate-reductase-influences-the-sensitivity-of-the-malaria-parasite-plasmodium-falciparum-to-ketotifen-a-cautionary-tale-in-screening-transgenic-parasites
#18
Phuong N Tran, Cameron J Tate, Melanie C Ridgway, Kevin J Saliba, Kiaran Kirk, Alexander G Maier
Ketotifen has recently been reported to inhibit the growth of both asexual and sexual malaria parasites. A parasite transporter, PfgABCG2, has been implicated in its mechanism of action. Human dihydrofolate reductase (hDHFR) is the most commonly used selectable marker to create transgenic Plasmodium falciparum cell lines. Growth assays using transgenic P. falciparum parasites with different selectable markers revealed that the presence of hDHFR rather than the absence of PfgABCG2 is responsible for a shift in the parasite's sensitivity to ketotifen...
December 2016: International Journal for Parasitology, Drugs and Drug Resistance
https://www.readbyqxmd.com/read/27666395/pharmacological-evaluation-of-antiasthmatic-activity-of-myrica-nagi-bark-extracts
#19
Rinu K Rana, Rakesh K Patel
BACKGROUND: The involvement of debilitating side effects of allopathic antiasthmatic drugs provides a strong impetus for the development of new herbal therapeutics. Myrica nagi Thunb. (Syn. Kaiphal) of Myricaceae family is a known drug of the Ayurveda system used for the treatment of several diseases including asthma. METHODS: The present study deals with the preparation and phytochemical screening of polar, non-polar and methanolic extracts of Myrica nagi bark followed by the evaluation of their antiasthmatic activity using four different animal experimental models: acetylcholine induced bronchospasm in conscious guinea pigs, acetylcholine induced contraction on isolated guinea pig tracheal chain preparation, compound 48/80 induced mast cell degranulation using rat, and trypsin and egg albumin induced bronchospasm in conscious rat...
September 23, 2016: Anti-inflammatory & Anti-allergy Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/27610257/a-gel-formulation-containing-a-new-recombinant-form-of-manganese-superoxide-dismutase-a-clinical-experience-based-on-compassionate-use-safety-of-a-case-report
#20
Lucia Grumetto, Antonio Del Prete, Giovanni Ortosecco, Antonella Borrelli, Salvatore Del Prete, Aldo Mancini
Background. We report a case of bilateral posterior subcapsular cataracts (PSCs) in a 24-year-old man with an allergic conjunctivitis history caused by a long-term therapy with glucocorticoids. Case Presentation. The patient showed a visual acuity of 9/10 for both eyes. He followed a therapy with ketotifen and bilastine for four years. During the last six months before our evaluation, he was treated with chloramphenicol and betamethasone, interrupted for onset of cataracts and increased intraocular pressure...
2016: Case Reports in Ophthalmological Medicine
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