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Leukotriene antagonists

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https://www.readbyqxmd.com/read/28318626/the-leukotriene-b4-leukotriene-b4-receptor-axis-promotes-cisplatin-induced-acute-kidney-injury-by%C3%A2-modulating-neutrophil-recruitment
#1
Bo Deng, Yuli Lin, Shuai Ma, Yin Zheng, Xuguang Yang, Bingji Li, Wenyan Yu, Qingqing Xu, Tingyan Liu, Chuanming Hao, Rui He, Feng Ding
Cisplatin is an effective chemotherapeutic agent and widely used in treatment of various solid organ malignancies, including head and neck, ovarian, and testicular cancers. However, the induction of acute kidney injury (AKI) is one of its main side effects. Leukotriene B4 receptor 1 (BLT1) mediates the majority of physiological effects of leukotriene B4 (LTB4), a potent lipid chemoattractant generated at inflammation sites, but the role of the LTB4-BLT1 axis in cisplatin-induced AKI remains unknown. Here we found upregulated LTB4 synthesis and BLT1 expression in the kidney after cisplatin administration...
March 15, 2017: Kidney International
https://www.readbyqxmd.com/read/28301050/addition-of-anti-leukotriene-agents-to-inhaled-corticosteroids-for-adults-and-adolescents-with-persistent-asthma
#2
REVIEW
Bhupendrasinh F Chauhan, Maya M Jeyaraman, Amrinder Singh Mann, Justin Lys, Ahmed M Abou-Setta, Ryan Zarychanski, Francine M Ducharme
BACKGROUND: Asthma management guidelines recommend low-dose inhaled corticosteroids (ICS) as first-line therapy for adults and adolescents with persistent asthma. The addition of anti-leukotriene agents to ICS offers a therapeutic option in cases of suboptimal control with daily ICS. OBJECTIVES: To assess the efficacy and safety of anti-leukotriene agents added to ICS compared with the same dose, an increased dose or a tapering dose of ICS (in both arms) for adults and adolescents 12 years of age and older with persistent asthma...
March 16, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28290498/inhibition-of-leukotriene-b4-receptor-1-attenuates-lipopolysaccharide-induced-cardiac-dysfunction-role-of-ampk-regulated-mitochondrial-function
#3
Meng Sun, Rui Wang, Qinghua Han
Leukotriene B4 (LTB4)-mediated leukocyte recruitment and inflammatory cytokine production make crucial contributions to chronic inflammation and sepsis; however, the role of LTB4 in lipopolysaccharide (LPS)-induced cardiac dysfunction remains unclear. Therefore, the present study addressed this issue using an LTB4 receptor 1 (BLT1) inhibitor. Administration of LPS to mice resulted in decreased cardiovascular function. Inhibition of LTB4/BLT1 with the BLT1 inhibitor U75302 significantly improved survival and attenuated the LPS-induced acute cardiac dysfunction...
March 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28261551/odd-couple-the-unexpected-partnership-of-glucocorticoid-hormones-and-cysteinyl-leukotrienes-in-the-extrinsic-regulation-of-murine-bone-marrow-eosinopoiesis
#4
REVIEW
Pedro Xavier-Elsas, Daniela Masid-de-Brito, Bruno Marques Vieira, Maria Ignez C Gaspar-Elsas
Granulopoiesis in murine bone-marrow is regulated by both intrinsic and extrinsic factors (including hormones, drugs, inflammatory mediators and cytokines). Eosinophils, a minor subpopulation of circulating leukocytes, which remains better understood in its contributions to tissue injury in allergic disease than in its presumably beneficial actions in host defense, provide a striking example of joint regulation of granulopoiesis within murine bone-marrow by all of these classes of extrinsic factors. We first described the upregulation of eosinopoiesis in bone-marrow of allergen-sensitized mice following airway allergen challenge...
February 20, 2017: World Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28258202/the-endocannabinoid-metabolite-prostaglandin-e2-pge2-glycerol-inhibits-human-neutrophil-functions-involvement-of-its-hydrolysis-into-pge2-and-ep-receptors
#5
Caroline Turcotte, Simona Zarini, Stéphanie Jean, Cyril Martin, Robert C Murphy, David Marsolais, Michel Laviolette, Marie-Renée Blanchet, Nicolas Flamand
The endocannabinoids 2-arachidonoyl-glycerol and N-arachidonoyl-ethanolamine mediate an array of pro- and anti-inflammatory effects. These effects are related, in part, to their metabolism by eicosanoid biosynthetic enzymes. For example, N-arachidonoyl-ethanolamine and 2-arachidonoyl-glycerol can be metabolized by cyclooxygenase-2 into PG-ethanolamide (PG-EA) and PG-glycerol (PG-G), respectively. Although PGE2 is a recognized suppressor of neutrophil functions, the impact of cyclooxygenase-derived endocannabinoids such as PGE2-EA or PGE2-G on neutrophils is unknown...
March 3, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28242764/the-leukotriene-b4-receptors-blt1-and-blt2-form-an-antagonistic-sensitizing-system-in-peripheral-sensory-neurons
#6
Sebastian Zinn, Marco Sisignano, Katharina Kern, Sandra Pierre, Sorin Tunaru, Holger Jordan, Jing Suo, Elsa-Marie Treutlein, Carlo Angioni, Nerea Ferreiros, Andreas Leffler, Natasja DeBruin, Stefan Offermanns, Gerd Geisslinger, Klaus Scholich
Sensitization of the heat-activated ion channel Transient Receptor Potential Vanilloid 1 (TRPV1) through lipids is a fundamental mechanism during inflammation-induced peripheral sensitization. Leukotriene B4 is a proinflammatory lipid-mediator whose role in peripheral nociceptive sensitization is to date not well understood. Two major G-Protein-coupled receptors for Leukotriene B4 have been identified: the high affinity receptor BLT1 and the low affinity receptor BLT2. Transcriptional screening for the expression GProtein-coupled receptors in murine dorsal root ganglia showed that both receptors were among the highest expressed in dorsal root ganglia...
February 27, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28208913/eosinophilic-granulomatosis-with-polyangiitis-egpa-and-hepatitis-b-infection-a-rare-association
#7
Nidhi Kaeley, Narula Kamakshi
Eosinophilic Granulomatosis with Polyangiitis (EGPA) or Churg-Strauss syndrome is a rare systemic illness which is characterized by necrotizing inflammation of small and medium sized vessels. The prominent features include asthma, eosinophilia, transient pulmonary infiltration and systemic vasculitis. Various triggering factors have been reported as putative aetiological agents of Churg-Strauss syndrome. They include infections, allergic desensitization, vaccinations like hepatitis B and influenza vaccination, cocaine abuse, drugs like leukotriene receptor antagonists and exposure to pigeons...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28196638/japanese-guidelines-for-adult-asthma-2017
#8
REVIEW
Masakazu Ichinose, Hisatoshi Sugiura, Hiroyuki Nagase, Masao Yamaguchi, Hiromasa Inoue, Hironori Sagara, Jun Tamaoki, Yuji Tohda, Mitsuru Munakata, Kohei Yamauchi, Ken Ohta
Adult bronchial asthma is characterized by chronic airway inflammation, and presents clinically with variable airway narrowing (wheezes and dyspnea) and cough. Long-standing asthma induces airway remodeling, leading to intractable asthma. The number of patients with asthma has increased; however, the number of patients who die of asthma has decreased (1.2 per 100,000 patients in 2015). The goal of asthma treatment is to enable patients with asthma to attain normal pulmonary function and lead a normal life, without any symptoms...
February 11, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28157474/factors-impacting-asthma-control-in-children-in-a-low-to-middle-income-country-setting-a-retrospective-study
#9
K A Monene, R Masekela
OBJECTIVES: 1) To assess asthma control and its evolution over time among children in a low-to-middle-income country, and 2) to explore whether demographics, type of asthma medication, comorbidities or exacerbations impact asthma control. METHODS: In a retrospective study in children with asthma aged 6-18 years conducted between 2005 and 2010, we collected clinical and demographic data and used Global Initiative for Asthma (GINA) criteria to assess asthma control...
January 1, 2017: International Journal of Tuberculosis and Lung Disease
https://www.readbyqxmd.com/read/28154801/pranlukast-reduces-asthma-exacerbations-during-autumn-especially-in-1-to-5-year-old-boys
#10
Yoshinori Morita, Eduardo Campos Alberto, Shuichi Suzuki, Yoshinori Sato, Akira Hoshioka, Hiroki Abe, Kimiyuki Saito, Toshikazu Tsubaki, Mana Haraki, Akiko Sawa, Yoshio Nakayama, Hiroyuki Kojima, Midori Shigeta, Fumiya Yamaide, Yoichi Kohno, Naoki Shimojo
BACKGROUND: Leukotriene receptor antagonists have been used to prevent virus-induced asthma exacerbations in autumn. Its efficacy, however, might differ with age and sex. OBJECTIVE: This study aimed to investigate whether pranlukast added to usual asthma therapy in Japanese children during autumn, season associated with the peak of asthma, reduces asthma exacerbations. It was also evaluated the effect of age and sex on pranlukast's efficacy. METHODS: A total of 121 asthmatic children aged 1 to 14 years were randomly assigned to receive regular pranlukast or not according to sex, and were divided in 2 age groups, 1-5 years and 6-14 years...
January 2017: Asia Pacific Allergy
https://www.readbyqxmd.com/read/28152126/sinonasal-quality-of-life-in-children-after-outfracture-of-inferior-turbinates-and-submucous-inferior-turbinoplasty-for-chronic-nasal-congestion
#11
Brian Manzi, Kevin J Sykes, Julie L Wei
Importance: Chronic nasal congestion often persists in children despite empirical treatment using intranasal corticosteroids, systemic antihistamines, and/or leukotriene receptor antagonists. Symptoms are often reported even with negative results of skin or blood allergy testing. Inferior turbinoplasty has been effective in adults and children, but outfracture of inferior turbinates in children is rarely reported, as is use of validated quality-of-life measures to quantify improvements after intervention...
February 2, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28139852/eosinophil-transendothelial-migration-induced-by-the-bronchoalveolar-lavage-fluid-of-acute-eosinophilic-pneumonia
#12
Kazuyuki Nakagome, Hisakazu Shoda, Tetsu Shirai, Fuyumi Nishihara, Tomoyuki Soma, Yoshitaka Uchida, Yoshio Sakamoto, Makoto Nagata
BACKGROUND AND OBJECTIVE: Acute eosinophilic pneumonia (AEP) is characterized by a massive pulmonary infiltration of eosinophils. Mechanisms regulating the selective accumulation of eosinophils in AEP have not been fully established. The objective of this study was to evaluate the mechanisms of eosinophil accumulation in alveolar spaces through examination of bronchoalveolar lavage fluid (BALF) from AEP patients (AEP-BALF). METHODS: Eosinophils were isolated from the blood of healthy subjects and were placed on a human pulmonary microvascular endothelial cell monolayer cultured on Transwell filters (Coster, Cambridge, MA, USA)...
January 31, 2017: Respirology: Official Journal of the Asian Pacific Society of Respirology
https://www.readbyqxmd.com/read/28119312/stoppfrail-screening-tool-of-older-persons-prescriptions-in-frail-adults-with-limited-life-expectancy-consensus-validation
#13
Amanda Hanora Lavan, Paul Gallagher, Carole Parsons, Denis O'Mahony
OBJECTIVE: to validate STOPPFrail, a list of explicit criteria for potentially inappropriate medication (PIM) use in frail older adults with limited life expectancy. DESIGN: a Delphi consensus survey of an expert panel comprising academic geriatricians, clinical pharmacologists, palliative care physicians, old age psychiatrists, general practitioners and clinical pharmacists. SETTING: Ireland. SUBJECTS: seventeen panellists...
January 23, 2017: Age and Ageing
https://www.readbyqxmd.com/read/28115217/cysteinyl-leukotriene-e4-activates-human-group-2-innate-lymphoid-cells-and-enhances-the-effect-of-prostaglandin-d2-and-epithelial-cytokines
#14
Maryam Salimi, Linda Stöger, Wei Liu, Simei Go, Ian Pavord, Paul Klenerman, Graham Ogg, Luzheng Xue
BACKGROUND: Group 2 innate lymphoid cells (ILC2s) are a potential innate source of type 2 cytokines in the pathogenesis of allergic conditions. Epithelial cytokines (IL-33, IL-25, and thymic stromal lymphopoietin [TSLP]) and mast cell mediators (prostaglandin D2 [PGD2]) are critical activators of ILC2s. Cysteinyl leukotrienes (cysLTs), including leukotriene (LT) C4, LTD4, and LTE4, are metabolites of arachidonic acid and mediate inflammatory responses. Their role in human ILC2s is still poorly understood...
January 20, 2017: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28109729/comparison-of-the-effects-of-nasal-steroids-and-montelukast-on-olfactory-functions-in-patients-with-allergic-rhinitis
#15
A Dalgic, M E Dinc, S Ulusoy, D Dizdar, A Is, M Topak
OBJECTIVE: Olfactory dysfunction is one of the comorbidities associated with allergic rhinitis (AR) and AR is one of the common causes of olfactory problems. We aimed to evaluate by the Sniffin' Sticks test the effects on olfactory functions of nasal steroids and leukotriene antagonists used for allergic rhinitis. METHODS: Thirty patients with seasonal rhinitis were included in this study. Patients were randomly divided into three groups of 10 patients; group 1 received montelukast sodium and mometasone furoate (MF) therapy, group 2 received only montelukast, and group 3 only MF...
January 18, 2017: European Annals of Otorhinolaryngology, Head and Neck Diseases
https://www.readbyqxmd.com/read/28108245/japanese-guidelines-for-childhood-asthma-2017
#16
REVIEW
Hirokazu Arakawa, Yuhei Hamasaki, Yoichi Kohno, Motohiro Ebisawa, Naomi Kondo, Sankei Nishima, Toshiyuki Nishimuta, Akihiro Morikawa
The Japanese Guideline for the Diagnosis and Treatment of Allergic Diseases 2017 (JAGL 2017) includes a minor revision of the Japanese Pediatric Guideline for the Treatment and Management of Asthma 2012 (JPGL 2012) by the Japanese Society of Pediatric Allergy and Clinical Immunology. The section on child asthma in JAGL 2017 provides information on how to diagnose asthma between infancy and adolescence (0-15 years of age). It makes recommendations for best practices in the management of childhood asthma, including management of acute exacerbations and non-pharmacological and pharmacological management...
January 18, 2017: Allergology International: Official Journal of the Japanese Society of Allergology
https://www.readbyqxmd.com/read/28099820/new-and-developing-non-adrenoreceptor-small-molecule-drugs-for-the-treatment-of-asthma
#17
REVIEW
Neil C Thomson
Inhaled corticosteroids (ICS) alone or in combination with an inhaled long-acting beta2-agonist (LABA) are the preferred long-term treatment for adults and adolescents with symptomatic asthma. Additional drugs include leukotriene-receptor antagonists, slow-release theophylline and the long-acting muscarinic antagonist (LAMA) tiotropium (approved in 2015). There is a need for more effective therapies, as many patients continue to have poorly controlled asthma. Areas covered: New and developing long-acting non-adrenoreceptor synthetic drugs for the treatment of symptomatic chronic asthma despite treatment with an ICS alone or combined with a LABA...
February 2017: Expert Opinion on Pharmacotherapy
https://www.readbyqxmd.com/read/28098359/m2-like-macrophages-induce-colon-cancer-cell-invasion-via-matrix-metalloproteinases
#18
Katyayni Vinnakota, Yuan Zhang, Benson Chellakkan Selvanesan, Geriolda Topi, Tavga Salim, Janna Sand-Dejmek, Gunilla Jönsson, Anita Sjölander
The inflammatory milieu plays an important role in colon cancer development and progression. Previously, we have shown that tumor-associated macrophages (TAMs), an important component of the tumor microenvironment, are enriched in tumors compared with normal tissue and confer a poorer prognosis. In the present study, we found that matrix metallopeptidase-9 (MMP-9), which degrades extracellular matrix proteins, was increased in biopsies from colon cancer patients and in mouse xenografts with SW480 cell-derived tumors...
January 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28092287/current-and-future-management-of-the-young-child-with-early-onset-wheezing
#19
Allison J Burbank, Stanley J Szefler
PURPOSE OF REVIEW: In this review, we discuss current thinking in relation to available guidelines for the care of preschool-aged children with recurrent wheezing, while highlighting the gaps in our knowledge and discussing changes that could occur over the next 5 years. RECENT FINDINGS: The Asthma Predictive Index as well as allergen-specific IgE, peripheral eosinophil count and exhaled nitric oxide are perhaps underutilized sources of information that can assist in predicting progression to asthma and response to therapies...
January 13, 2017: Current Opinion in Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/28088523/the-selective-cysteinyl-leukotriene-receptor-1-cyslt1r-antagonist-montelukast-regulates-extracellular-matrix-remodeling
#20
Jingli Peng, Hezheng Zhou, Guoping Kuang, Lilian Xie, Tao Tian, Ru Liu
Scar formation after filtration surgery of glaucoma is mainly caused by excessive synthesis of new extracellular matrix (ECM) and contraction of subconjunctival tissue mediated by human Tenon fibroblasts (HTFs) and the transforming growth factor (TGF-β1). Montelukast, a potent and specific cysteinyl leukotriene receptor 1 (cysLT1R) antagonist, is a licensed drug clinically used for the treatment of bronchial asthma. In this study, we investigated the effects of montelukast on the contractility of HTFs cultured in a three-dimensional collagen gel...
March 11, 2017: Biochemical and Biophysical Research Communications
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