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Leukotriene antagonists

Marco Rimoldi, Oliviero Rossi, Nadia Rota
OBJECTIVE: To assess the clinical status of chronic spontaneous urticaria (CSU) and understand treatment approaches in Italy through specialists who treat CSU (dermatologists and allergy specialists) and CSU patients' experience. DESIGN: Multicentre survey. SETTING: Online structured questionnaires (one for physicians and one for patients). PARTICIPANTS: Physicians and patients with CSU in Italy. INTERVENTIONS: None...
October 14, 2016: BMJ Open
Zhen-Nan Ye, Zong Zhuang, Ling-Yun Wu, Jing-Peng Liu, Qiang Chen, Xiang-Sheng Zhang, Meng-Liang Zhou, Zi-Huan Zhang, Wei Li, Xiao-Liang Wang, Chun-Hua Hang
Convincing evidence supports that nuclear factor kappa B (NF-κB)-meditated inflammation contributes to the adverse prognosis of aneurysmal subarachnoid hemorrhage (SAH), and pathologic neutrophil accumulation after SAH in the brain parenchyma enhances the inflammatory process. Leukotriene B4 (LTB4) is a highly potent lipid chemoattractant of neutrophils, and its biological effects are mediated primarily through the high-affinity LTB4 receptor 1 (BLT1). It is verified that NF-κB-dependent BLT1 mediates LTB4 signaling and LTB4 stimulates NF-κB-dependent inflammation via BLT1...
October 7, 2016: Brain Research
Arijit Ghosh, Fang Chen, Feng Wu, Su-Su Tang, Mei Hu, Yan Long, Hong-Bin Sun, Ling-Yi Kong, Hao Hong
Our previous studies showed that cysteinyl leukotrienes receptor 1 (CysLT1R) is upregulated in amyloid-β (Aβ)-induced neurotoxicity and that administration of CysLT1R antagonists such as pranlukast or montelukast can ameliorate memory impairment in mice. In the current study, we sought to explore the role of CysLT1R in intracerebroventricular streptozotocin (STZ-ICV)-induced mouse model of memory impairment and neuroinflammation through shRNA-mediated knockdown of CysLT1R and also its pharmacological blockade by pranlukast...
October 6, 2016: Progress in Neuro-psychopharmacology & Biological Psychiatry
Hoang Kim Tu Trinh, Ga-Young Ban, Ji-Ho Lee, Hae-Sim Park
Elderly asthma (EA) is regarded as a distinct phenotype of asthma and is associated with age-related changes in airway structure and alterations in lung function and immune responses. EA is difficult to diagnose because of aging and co-morbidities, and overlaps with fixed airway obstructive disease. Novel modalities to differentiate between EA and chronic obstructive pulmonary disease (COPD) are necessary. A multifaceted approach, including clinical history, smoking habits, atopy, and measurement of lung function, is mandatory to differentiate asthma from COPD...
October 6, 2016: Drugs & Aging
Misako Shigematsu, Tomoaki Koga, Ayako Ishimori, Kazuko Saeki, Yumiko Ishii, Yoshitaka Taketomi, Mai Ohba, Airi Jo-Watanabe, Toshiaki Okuno, Norihiro Harada, Takeshi Harayama, Hideo Shindou, Jian-Dong Li, Makoto Murakami, Sumio Hoka, Takehiko Yokomizo
Although pneumococcal infection is a serious problem worldwide and has a high mortality rate, the molecular mechanisms underlying the lethality caused by pneumococcus remain elusive. Here, we show that BLT2, a G protein-coupled receptor for leukotriene B4 and 12(S)-hydroxyheptadecatrienoic acid (12-HHT), protects mice from lung injury caused by a pneumococcal toxin, pneumolysin (PLY). Intratracheal injection of PLY caused lethal acute lung injury (ALI) in BLT2-deficient mice, with evident vascular leakage and bronchoconstriction...
October 5, 2016: Scientific Reports
Chun Teng Zhang, Jing Ran Lin, Feng Wu, Arijit Ghosh, Su Su Tang, Mei Hu, Yan Long, Hong Bin Sun, Hao Hong
Extensive studies have demonstrated that neuroinflammation is associated with Alzheimer's disease (AD) and cysteinyl leukotriene receptor 1 (CysLT1R) was involved in neuroinflammation. Montelukast, a highly selective CysLT1R antagonist, has been reported to attenuate learning and memory impairments in the amyloid-β-induced mouse model of AD. However, whether montelukast also exerts beneficial effects on streptozotocin (STZ)-induced memory deficits in mice is not well known. In the present study, we aimed to investigate the effects of montelukast on STZ-induced cognitive impairment, neuroinflammation and apoptosis in mice...
October 1, 2016: Neurotoxicology
Hsiang-Han Su, Hsin-Ting Lin, Jau-Ling Suen, Chau Chyun Sheu, Kazunari K Yokoyama, Shau-Ku Huang, Chih Mei Cheng
Pulmonary fibroblast migration and differentiation are critical events in fibrogenesis; meanwhile, fibrosis characterizes the pathology of many respiratory diseases. The role of aryl hydrocarbon receptor (AhR), a unique cellular chemical sensor, has been suggested in tissue fibrosis, but the mechanisms through which the AhR-ligand axis influences the fibrotic process remain undefined. In this study, the potential impact of the AhR-ligand axis on pulmonary fibroblast migration and differentiation was analyzed using human primary lung fibroblasts HFL-1 and CCL-202 cells...
September 30, 2016: Toxicology
Dan Xu, Yingshuo Wang, Zhimin Chen, Shuxian Li, Yungai Cheng, Li Zhang, Lingzhi Zhao
BACKGROUND: Asthma is a global problem. Prevalence varies among different countries and cities. We aimed to obtain the prevalence, describe the characteristics, and discover factors that may relate to asthma in Hangzhou. METHODS: This cross-sectional study was conducted in Hangzhou. The subjects were children aged 14 years and younger. A control group of non-asthma children that matched in age and sex with each asthmatic patient was also randomly selected and interviewed...
September 27, 2016: Respiratory Research
H P T Ammon
: Boswellic acids, which are pentacyclic triterpenes belong to the active pharmacological compounds of the oleogum resin of different Boswellia species. In the resin, more than 12 different boswellic acids have been identified but only KBA and AKBA received significant pharmacological interest. Biological Activity: In an extract of the resin of Boswellia species multiple factors are responsible for the final outcome of a therapeutic effect, be it synergistic or antagonistic. Moreover, the anti-inflammatory actions of BAs are caused by different mechanisms of action...
2016: Advances in Experimental Medicine and Biology
Alexei Gonzalez-Estrada, Stephen A Geraci
Allergic diseases are common in women of childbearing age. Both asthma and atopic conditions may worsen, improve or remain the same during pregnancy. Primary care physicians commonly encounter women receiving multiple medications for pre-existing atopic conditions, who then become pregnant and require medication changes to avoid potential fetal injury or congenital malformations. Each medication should be evaluated; intranasal and inhaled steroids are relatively safe to continue during pregnancy (budesonide is the drug of choice), second-generation antihistamines of choice are cetirizine and loratadine, leukotriene receptor antagonists are safe, sparing use of oral decongestants during the first trimester and omalizumab may be used for both uncontrolled asthma and for antihistamine-resistant urticaria...
September 2016: American Journal of the Medical Sciences
Stéphanie Corriveau, Simon Blouin, Elyse Burt, Eric Rousseau, Jean-Charles Pasquier
OBJECTIVE: The potency of acute montelukast treatment, a leukotriene receptor antagonist, has been demonstrated as tocolytic on in vitro myometrial contractility. This study assessed the ability of a 48h montelukast treatment to modify in vitro contractions under inflammatory conditions in a pregnant rat model. STUDY DESIGN: Pregnant Sprague-Dawley rats were injected intraperitoneally (gestational days 20-22) with lipopolysaccharides (LPS) 200μg/kg (4 treatments at 12h intervals) alone or combined with montelukast 10mg/kg/day or a saline solution for a 48h period...
August 9, 2016: European Journal of Obstetrics, Gynecology, and Reproductive Biology
M V Varma, E Kimoto, R Scialis, Y Bi, J Lin, H Eng, A S Kalgutkar, A F El-Kattan, A D Rodrigues, L M Tremaine
Montelukast, a leukotriene receptor antagonist commonly prescribed for treatment of asthma, is primarily metabolized by Cytochrome P450 (CYP)2C8, and has been suggested as a probe substrate for investigating CYP2C8 activity in vivo. We evaluated the quantitative role of hepatic uptake transport in its pharmacokinetics and drug-drug interactions (DDIs). Montelukast was characterized with significant active uptake in human hepatocytes, and showed affinity towards organic anion transporting polypeptides (OATPs) in transfected cell systems...
September 20, 2016: Clinical Pharmacology and Therapeutics
Nathan P Falk, Scott W Hughes, Blake C Rodgers
Chronic asthma is a major health concern for children and adults worldwide. The goal of treatment is to prevent symptoms by reducing airway inflammation and hyperreactivity. Step-up therapy for symptom control involves initiation with low-dose treatment and increasing intensity at subsequent visits if control is not achieved. Step-down therapy starts with a high-dose regimen, reducing intensity as control is achieved. Multiple randomized controlled trials have shown that inhaled corticosteroids are the most effective monotherapy...
September 15, 2016: American Family Physician
Svjetlana Loga Zec, Kenan Selmanovic, Natasa Loga Andrijic, Azra Kadic, Lamija Zecevic, Lejla Zunic
INTRODUCTION: Bronchopneumonia is the most common clinical manifestation of pneumonia in pediatric population and leading infectious cause of mortality in children under 5 years. Evaluation of treatment involves diagnostic procedures, assessment of disease severity and treatment for disease with an emphasis on vulnerability of the population. AIM: To determine the most commonly used antibiotics at the Pediatric Clinic in Sarajevo and concomitant therapy in the treatment of bronchopneumonia...
June 2016: Medical Archives
Brett P Bielory, Steven P Shah, Terrence P O'Brien, Victor L Perez, Leonard Bielory
PURPOSE OF REVIEW: The present review provides an overview on the potential of different systemic and topical treatments in chronic forms of ocular allergy and dry eye disorder (DED). The impact on anterior surface of ocular inflammatory disorder encompasses an array of conditions, which are frequently underreported. This can contribute to underdiagnoses and ineffective management from healthcare providers such as an allergist and/or ophthalmologist who routinely provide care for these common disorders...
October 2016: Current Opinion in Allergy and Clinical Immunology
Rachel E Roditi, Stacey Ishman, Stella Lee, Sandra Lin, Jennifer J Shin
OBJECTIVES: Adherence to the allergic rhinitis clinical practice guideline is being considered as a potential focus for national performance metrics. To help inform this discussion, we assessed patient- and clinician-reported medication administration among nationally representative populations of patients with allergic rhinitis. STUDY DESIGN: Cross-sectional analyses. SETTING AND SUBJECTS: Home health assessments, ambulatory visits. METHODS: Participants in the National Health and Nutrition Examination Survey and the National Ambulatory Medical Care Survey / National Hospital Ambulatory Medical Care Survey were assessed...
August 30, 2016: Otolaryngology—Head and Neck Surgery
Longkun Zhu, Ravi Maruvada, Adam Sapirstein, Marc Peters-Golden, Kwang Sik Kim
Cryptococcus neoformas infection of the central nervous system (CNS) continues to be an important cause of mortality and morbidity, and a major contributing factor is our incomplete knowledge of the pathogenesis of this disease. Here we provide the first direct evidence that C. neoformans exploits host cysteinyl leukotrienes (LTs), formed via LT biosynthetic pathways involving cytosolic phospholipase A2 α (cPLA2 α) and 5-lipoxygenase (5-LO) and acting via cysteinyl leukotriene type 1 receptor (CysLT1), for penetration of the blood-brain barrier...
August 29, 2016: Cellular Microbiology
Shoroq M Altawalbeh, Joshua M Thorpe, Carolyn T Thorpe, Kenneth J Smith
BACKGROUND: Long-acting beta agonists (LABA) and leukotriene receptor antagonists (LTRA) are the major add-on treatments in older adults with persistent asthma when inhaled corticosteroids (ICS) fail to achieve adequate asthma control. OBJECTIVES: To evaluate the cost-utility of ICS + LABA treatment compared with ICS + LTRA treatment in older adults with asthma. METHODS: A Markov model was used to estimate the incremental costs and quality-adjusted life expectancy associated with ICS + LABA treatment versus ICS + LTRA treatment in older adults with asthma in the United States from the health system perspective...
July 2016: Value in Health: the Journal of the International Society for Pharmacoeconomics and Outcomes Research
Shunichi Gamo, Hideya Iijima, Yumika Seki, Ryo Horaguchi, Yuji Suda, Yuriko Shindoh
An atopic asthmatic of 65-year-old man who was complicated with COPD and treated with inhaled corticosteroid, long-acting β2 agonist, long-acting muscarinic antagonist, and leukotriene receptor antagonist was hospitalized with a severe asthmatic attack. He was intubated and went onto an artificial respirator. He was gradually relieved by repeated intravenous administration of high-dose corticosteroid, and a respirator was switched over to non-invasive positive pressure ventilation on 24th day. However, he repeated asthmatic attacks which needed corticosteroid to recover...
July 2016: Arerugī, [Allergy]
Seo W Kim, Hunam Kim, Yon J Ryu, Jin H Lee, Sung S Shim, Yoo K Kim, Jung H Chang
INTRODUCTION: Pranlukast is a leukotriene receptor antagonist (LTRA) that is used as an additional controller of mild to moderate asthma. This study compared the efficacy and side effects of two bioequivalent preparations of pranlukast: original pranlukast (Onon(®); Ono Pharmaceutical, Japan) and a modified formulation of pranlukast (Prakanon(®); Yuhan Co, Korea) in patients with mild to moderate asthma. METHODS: Of the 34 subjects screened, 30 patients who were using standard medication to control asthma and scored less than 20 points on the Asthma Control Test(™) (ACT) were assigned randomly to one of the two groups in a prospective, open label, crossover study: group 1 received Prakanon(®) (150 mg/day) and group 2 received Onon(®) (450 mg/day) for 8 weeks each; after a 1-week rest period, the groups were switched to the alternative medication for further 8 weeks and monitored for 2 more weeks without study medication...
2016: Open Respiratory Medicine Journal
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