Prostaglandin Receptor
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
NTP42, a Novel Antagonist of the Thromboxane Receptor, Attenuates Experimentally Induced Pulmonary Arterial Hypertension Eamon P
Mulvaney et al. BMC Pulmonary Medicine (2020) 20:85 https://doi.org/10.1186/s12890-020-1113-2 RESEARCH ARTICLE Open Access NTP42, a novel antagonist of the thromboxane receptor, attenuates experimentally induced pulmonary arterial hypertension Eamon P. Mulvaney1, Helen M. Reid1,2, Lucia Bialesova1, Annie Bouchard3, Dany Salvail3 and B. Therese Kinsella1,2* Abstract Background: NTP42 is a novel antagonist of the thromboxane prostanoid receptor (TP), currently in development for the treatment of pulmonary arterial hypertension (PAH). PAH is a devastating disease with multiple pathophysiological hallmarks including excessive pulmonary vasoconstriction, vascular remodelling, inflammation, fibrosis, in situ thrombosis and right ventricular hypertrophy. Signalling through the TP, thromboxane (TX) A2 is a potent vasoconstrictor and mediator of platelet aggregation. It is also a pro-mitogenic, pro-inflammatory and pro-fibrotic agent. Moreover, the TP also mediates the adverse actions of the isoprostane 8-iso-prostaglandin F2α, a free-radical-derived product of arachidonic acid produced in abundance during oxidative injury. Mechanistically, TP antagonists should treat most of the hallmarks of PAH, including inhibiting the excessive vasoconstriction and pulmonary artery remodelling, in situ thrombosis, inflammation and fibrosis. This study aimed to investigate the efficacy of NTP42 in the monocrotaline (MCT)-induced PAH rat model, alongside current standard-of-care drugs. Methods: PAH was induced by subcutaneous injection of 60 mg/kg MCT in male Wistar–Kyoto rats. Animals were assigned into groups: 1. ‘No MCT’;2.‘MCT Only’;3.MCT+NTP42 (0.25mg/kgBID);4.MCT+Sildenafil(50mg/kgBID),and5.MCT+ Selexipag (1 mg/kg BID), where 28-day drug treatment was initiated within 24 h post-MCT. -
Lawout Journal.Qxd
University Heart Journal Vol. 6, No. 1, January 2010 Therapeutic Options for the Treatment of Pulmonary Hypertension Rownak Jahan Tamanna 1 1Department of Cardiology, BIRDEM Address for Correspondance Dr. Rownak Jahan Tamanna, Department of Cardiology, BIRDEM , Dhaka e- mail : [email protected] Abstract The therapy of pulmonary hypertension depends on the identification of underlying contributing factors. pulmonary arterial hypertension ( PAH) , which can be idiopathic or related to connective tissue disease, portal hypertension, HIV disease, inges - tion of certain drugs or toxins, or congenital heart disease, had no specific therapy until recently. However, the past decade has seen remarkable progress, and these heretofore devastating and usually lethal forms of pulmonary hypertension now often respond to one form of therapy or another, leading to improved functional capacity and even survival. The following will consider the major pharmacotherapy’s now available for PAH and suggest a framework for therapeutic decision-making. Key word : Pulmonary hypertension Introduction although they can be quite useful for ameliorating symp - Pulmonary hypertension refers to an abnormal elevation of toms, they do not significantly affect the natural history of pulmonary artery ( PA ) pressure (mean PA pressure > 25 mm the disease. Hg at rest and 30 mm Hg with exercise). Newer and more effective pharmacotherapy’s for PAH are It is a rare disease of unknown etiology, whereas secondary now available, starting with prostacyclins in 1996 and, more pulmonary hypertension is a complication of pulmonary, recently, endothelin receptor antagonists and phosphodi - cardiac and extrathoracic conditions. Unrelieved pulmonary esterase 5 inhibitors. Relative merits of the different thera - hypertension can lead to right heart failure. -
(12) United States Patent (10) Patent No.: US 9,498,481 B2 Rao Et Al
USOO9498481 B2 (12) United States Patent (10) Patent No.: US 9,498,481 B2 Rao et al. (45) Date of Patent: *Nov. 22, 2016 (54) CYCLOPROPYL MODULATORS OF P2Y12 WO WO95/26325 10, 1995 RECEPTOR WO WO99/O5142 2, 1999 WO WOOO/34283 6, 2000 WO WO O1/92262 12/2001 (71) Applicant: Apharaceuticals. Inc., La WO WO O1/922.63 12/2001 olla, CA (US) WO WO 2011/O17108 2, 2011 (72) Inventors: Tadimeti Rao, San Diego, CA (US); Chengzhi Zhang, San Diego, CA (US) OTHER PUBLICATIONS Drugs of the Future 32(10), 845-853 (2007).* (73) Assignee: Auspex Pharmaceuticals, Inc., LaJolla, Tantry et al. in Expert Opin. Invest. Drugs (2007) 16(2):225-229.* CA (US) Wallentin et al. in the New England Journal of Medicine, 361 (11), 1045-1057 (2009).* (*) Notice: Subject to any disclaimer, the term of this Husted et al. in The European Heart Journal 27, 1038-1047 (2006).* patent is extended or adjusted under 35 Auspex in www.businesswire.com/news/home/20081023005201/ U.S.C. 154(b) by Od en/Auspex-Pharmaceuticals-Announces-Positive-Results-Clinical M YW- (b) by ayS. Study (published: Oct. 23, 2008).* This patent is Subject to a terminal dis- Concert In www.concertpharma. com/news/ claimer ConcertPresentsPreclinicalResultsNAMS.htm (published: Sep. 25. 2008).* Concert2 in Expert Rev. Anti Infect. Ther. 6(6), 782 (2008).* (21) Appl. No.: 14/977,056 Springthorpe et al. in Bioorganic & Medicinal Chemistry Letters 17. 6013-6018 (2007).* (22) Filed: Dec. 21, 2015 Leis et al. in Current Organic Chemistry 2, 131-144 (1998).* Angiolillo et al., Pharmacology of emerging novel platelet inhibi (65) Prior Publication Data tors, American Heart Journal, 2008, 156(2) Supp. -
Prevention of Atherothrombotic Events in Patients with Diabetes Mellitus: from Antithrombotic Therapies to New-Generation Glucose-Lowering Drugs
CONSENSUS STATEMENT EXPERT CONSENSUS DOCUMENT Prevention of atherothrombotic events in patients with diabetes mellitus: from antithrombotic therapies to new-generation glucose-lowering drugs Giuseppe Patti1*, Ilaria Cavallari2, Felicita Andreotti3, Paolo Calabrò4, Plinio Cirillo5, Gentian Denas6, Mattia Galli3, Enrica Golia4, Ernesto Maddaloni 7, Rossella Marcucci8, Vito Maurizio Parato9,10, Vittorio Pengo6, Domenico Prisco8, Elisabetta Ricottini2, Giulia Renda11, Francesca Santilli12, Paola Simeone12 and Raffaele De Caterina11,13*, on behalf of the Working Group on Thrombosis of the Italian Society of Cardiology Abstract | Diabetes mellitus is an important risk factor for a first cardiovascular event and for worse outcomes after a cardiovascular event has occurred. This situation might be caused, at least in part, by the prothrombotic status observed in patients with diabetes. Therefore, contemporary antithrombotic strategies, including more potent agents or drug combinations, might provide greater clinical benefit in patients with diabetes than in those without diabetes. In this Consensus Statement, our Working Group explores the mechanisms of platelet and coagulation activity , the current debate on antiplatelet therapy in primary cardiovascular disease prevention, and the benefit of various antithrombotic approaches in secondary prevention of cardiovascular disease in patients with diabetes. While acknowledging that current data are often derived from underpowered, observational studies or subgroup analyses of larger trials, we propose -
Xử Trí Quá Liều Thuốc Chống Đông
XỬ TRÍ QUÁ LIỀU THUỐC CHỐNG ĐÔNG TS. Trần thị Kiều My Bộ môn Huyết học Đại học Y Hà nội Khoa Huyết học Bệnh viện Bạch mai TS. Trần thị Kiều My Coagulation cascade TIÊU SỢI HUYẾT THUỐC CHỐNG ĐÔNG VÀ CHỐNG HUYẾT KHỐI • Thuốc chống ngưng tập tiểu cầu • Thuốc chống các yếu tố đông máu huyết tương • Thuốc tiêu sợi huyết và huyết khối Thuốc chống ngưng tập tiểu cầu Đường sử Xét nghiệm theo dõi dụng Nhóm thuốc ức chế Glycoprotein IIb/IIIa: TM VerifyNow Abciximab, ROTEM Tirofiban SLTC, Hb, Hct, APTT, Clotting time Eptifibatide, ACT, aPTT, TT, and PT Nhóm ức chế receptor ADP /P2Y12 Uống NTTC, phân tích chức +thienopyridines năng TC bằng PFA, Clopidogrel ROTEM Prasugrel VerifyNow Ticlopidine +nucleotide/nucleoside analogs Cangrelor Elinogrel, TM Ticagrelor TM+uống ƯC ADP Uống Nhóm Prostaglandin analogue (PGI2): Uống NTTC, phân tích chức Beraprost, năng TC bằng PFA, ROTEM Iloprost (Illomedin), Xịt hoặc truyền VerifyNow TM Prostacyclin,Treprostinil Nhóm ức chế COX: Uống NTTC, phân tích Acetylsalicylicacid/Aspirin#Aloxiprin,Carbasalate, chức năng TC bằng calcium, Indobufen, Triflusal PFA, ROTEM VerifyNow Nhóm ức chế Thromboxane: Uống NTTC, phân tích chức +thromboxane synthase inhibitors năng TC bằng PFA, Dipyridamole (+Aspirin), Picotamide ROTEM +receptor antagonist : Terutroban† VerifyNow Nhóm ức chế Phosphodiesterase: Uống NTTC, phân tích chức Cilostazol, Dipyridamole, Triflusal năng TC bằng PFA, ROTEM VerifyNow Nhóm khác: Uống NTTC, phân tích chức Cloricromen, Ditazole, Vorapaxar năng TC bằng PFA, ROTEM VerifyNow Dược động học một số thuốc -
Effect of Garlic in Comparison with Misoprostol and Omeprazole on Aspirin Induced Peptic Ulcer in Male Albino Rats
Available online at www.derpharmachemica.com ISSN 0975-413X Der Pharma Chemica, 2017, 9(6):68-74 CODEN (USA): PCHHAX (http://www.derpharmachemica.com/archive.html) Effect of Garlic in Comparison with Misoprostol and Omeprazole on Aspirin Induced Peptic Ulcer in Male Albino Rats Ghada E Elgarawany¹, Fatma E Ahmed², Safaa I Tayel³, Shimaa E Soliman³ 1Departments of Physiology, Faculty of Medicine, Menoufia University, Egypt 2Pharmacology, Faculty of Medicine, Menoufia University, Egypt 3Medical Biochemistry, Faculty of Medicine, Menoufia University, Egypt ABSTRACT Aiming to evaluate the protective effect of garlic on aspirin induced peptic ulcer in comparison with misoprostol and omeprazole drugs and its possible mechanisms. Forty white male albino rats were used. Total acid content, ulcer area/mm2, histological study, mucosal & serum Total Antioxidant Capacity (TAC) by calorimetry and mucosal & serum PGE2 and serum TNF-α by ELISA were assayed. Titrable acidity and total acid output decreased in garlic, misoprostol and omeprazole treated groups. Garlic, misoprostol and omeprazole improved gastric mucosa and 2 decreased ulcer formation and ulcer area/mm . Aspirin decreased PGE2 in gastric mucosa and serum. Co-administration of garlic to aspirin significantly increased PGE2 near to normal in gastric mucosa. Aspirin significantly increased serum TNF-α than control and other groups. Garlic is suggested to protect the stomach against ulcer formation induced by aspirin by reducing gastric acidity, ulcer area, improve gastric mucosa, increasing PGE2 and decreasing TNF-α. Keywords: Aspirin, Garlic, Misoprostol, Omeprazole, Peptic ulcer INTRODUCTION Peptic ulcer is a worldwide problem, that present in around 4% of the population [1]. About 10% of people develop a peptic ulcer in their life [2]. -
Estimation of Serum Prostaglandin D2 Levels and Its Expression in Tissue of Alopecia Areata
ISSN: 2536-9474 (Print) Original article / FYMJ ISSN: 2536-9482 (Online) Fayoum University Medical Journal Soliman et al., 2019,4(1), 77-85 Estimation of serum prostaglandin D2 levels and its expression in tissue of Alopecia areata Talal A. Abd-ElRaheem1, Samar M.R. El-Tahlawy2, Olfat G. Shaker3, Mohamed H.Mohamed4 and Yasmin F.Soliman5 1. M.D, professor of Dermatology, STDs and Andrology department, Faculty of Medicine Fayoum University. 2. M.D, professor of Dermatology department, Faculty of Medicine Cairo University 3. M.D, professor of Biochemistry department, Faculty of Medicine-Cairo University 4. MD, lecturer of Dermatology, STDs and Andrology department, Faculty of Medicine Fayoum University 5. M.B.B.CH, Dermatology, STDs and Andrology department, Faculty of Medicine, Cairo University Abstract Results: There was statistically highly Back ground: Alopecia areata is a recurrent, significant difference between the two groups non-scaring type of hair loss considered to be regarding the mean value of PGD2 in tissue in an autoimmune process. Though its AA patients. It was significantly lower than in etiopathogenesis is not fully understood, many control group (p < 0.001). The mean value of therapeutic options have been used by PGD2 in serum in AA patients was dermatologists, but none are curative or significantly lower than in control group (p< preventive. Prostaglandins analogues which 0.05). are used to treat glaucoma. Increase in eye lash Conclusion: Prostaglandin D2 exhibits a number, thickness and pigmentation have been strong role in etiology of alopecia areata and reported as side effect. significantly was elevated in serum and tissue Methods: This cross sectional case control of alopecia areata patients. -
Inverse Agonism of SQ 29,548 and Ramatroban on Thromboxane A2 Receptor
Inverse Agonism of SQ 29,548 and Ramatroban on Thromboxane A2 Receptor Raja Chakraborty1,3, Rajinder P. Bhullar1, Shyamala Dakshinamurti2,3, John Hwa4, Prashen Chelikani1,2,3* 1 Department of Oral Biology, University of Manitoba, Winnipeg, Manitoba, Canada, 2 Departments of Pediatrics, Physiology, University of Manitoba, Winnipeg, Manitoba, Canada, 3 Biology of Breathing Group- Manitoba Institute of Child Health, Winnipeg, Manitoba, Canada, 4 Department of Internal Medicine (Cardiology), Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut, United States of America Abstract G protein-coupled receptors (GPCRs) show some level of basal activity even in the absence of an agonist, a phenomenon referred to as constitutive activity. Such constitutive activity in GPCRs is known to have important pathophysiological roles in human disease. The thromboxane A2 receptor (TP) is a GPCR that promotes thrombosis in response to binding of the prostanoid, thromboxane A2. TP dysfunction is widely implicated in pathophysiological conditions such as bleeding disorders, hypertension and cardiovascular disease. Recently, we reported the characterization of a few constitutively active mutants (CAMs) in TP, including a genetic variant A160T. Using these CAMs as reporters, we now test the inverse agonist properties of known antagonists of TP, SQ 29,548, Ramatroban, L-670596 and Diclofenac, in HEK293T cells. Interestingly, SQ 29,548 reduced the basal activity of both, WT-TP and the CAMs while Ramatroban was able to reduce the basal activity of only the CAMs. Diclofenac and L-670596 showed no statistically significant reduction in basal activity of WT-TP or CAMs. To investigate the role of these compounds on human platelet function, we tested their effects on human megakaryocyte based system for platelet activation. -
Cyclooxygenase Pathway
Cyclooxygenase Pathway Diverse physical, chemical, Phospholipase A Glucocorticoids inflammatory, and 2 mitogenic stimuli NSAIDs NSAIDs Arachidonic Acid Prostaglandin G2 CYCLOOXYGENASE Prostaglandin G2 Prostaglandin H Prostaglandin H Synthase-1 Synthase-2 (COX 1) (COX 2) Prostaglandin H2 PEROXIDASE Prostaglandin H2 Tissue Specific Isomerases Prostacyclin Thromboxane A2 Prostaglandin D2 Prostaglandin E2 Prostaglandin F2α IP TPα, TPβ DP1, DP2 EP1, EP2, EP3, EP4 FPα, FPβ Endothelium, Kidney, Platelets, Vascular Mast Cells, Brain, Brain, Kidney, Vascular Uterus, Airways, Vascular Platelets, Brain Smooth Muscle Cells, Airways, Lymphocytes, Smooth Muscle Cells, Smooth Muscle Cells, Macrophages, Kidney Eosinophils Platelets Eyes Prostacyclin Item No. Product Features Prostacyclin (Prostaglandin I2; PGI2) is formed from arachidonic acid primarily in the vascular endothelium and renal cortex by sequential 515211 6-keto • Sample Types: Culture Medium | Plasma Prostaglandin • Measure 6-keto PGF levels down to 6 pg/ml activities of COX and prostacyclin synthase. PGI2 is non-enzymatically 1α F ELISA Kit • Incubation : 18 hours | Development: 90-120 minutes | hydrated to 6-keto PGF1α (t½ = 2-3 minutes), and then quickly converted 1α Read: Colorimetric at 405-420 nm to the major metabolite, 2,3-dinor-6-keto PGF1α (t½= 30 minutes). Prostacyclin was once thought to be a circulating hormone that regulated • Assay 24 samples in triplicate or 36 samples in duplicate platelet-vasculature interactions, but the rate of secretion into circulation • NOTE: A portion of urinary 6-keto PGF1α is of renal origin coupled with the short half-life indicate that prostacyclin functions • NOTE : It has been found that normal plasma levels of 6-keto PGF may be low locally. -
New Investigational Drugs for Androgenetic Alopecia. Valente Duarte De Sousa IC 1, Tosti A
Expert Opin Investig Drugs. 2013 May;22(5):573-89. doi: 10.1517/13543784.2013.784743. Epub 2013 Apr 4. New investigational drugs for androgenetic alopecia. Valente Duarte de Sousa IC 1, Tosti A . Author information • [email protected] Erratum in • Erratum. [Expert Opin Investig Drugs. 2015] Abstract INTRODUCTION: Androgenetic alopecia (AGA) is the most common form of hair loss, however current treatment options are limited and moderately effective. In the past few years, there has been an increased interest in deciphering the molecular mechanisms responsible for this disorder, which has opened the possibility of novel treatments that promise to not only stimulate hair growth, but also to induce formation of new hair follicles. AREAS COVERED: The future holds more effective topical treatments with less systemic side effects (such as topical 5- alfa-reductase inhibitors), prostaglandin analogs and antagonists, medications which act through the Wnt signaling pathway, stem cells for hair regeneration, platelet-rich plasma (PRP) and more effective ways of transplanting hair. A comprehensive search was made using PubMed, GoogleScholar and Clinicaltrial.gov using different combination of key words, which included AGA treatment, new treatments for AGA, Wnt pathway, prostaglandins, PRP and stem cells for hair regrowth. EXPERT OPINION: In the near future, treatments with topical 5-alfa-reductase inhibitors and prostaglandin agonists or antagonists are expected. More evidence is needed to verify the efficacy of PRP. Although hair follicle bioengineering and multiplication is a fascinating and promising field, it is still a long way from being available to clinicians. J Am Acad Dermatol. 2015 Apr;72(4):712-6. -
WHO Drug Information Vol
WHO Drug Information Vol. 24, No. 4, 2010 World Health Organization WHO Drug Information Contents WHO Prequalification Sitaxentan: worldwide withdrawal 307 Programmes Sibutramine: suspension of sales 307 Sibutramine-containing medicines: WHO Prequalification of Medicines withdrawal 308 Programme: survey of service Testosterone transdermal patch: quality provided to manufacturers 293 withdrawal of extension of WHO initiates pilot prequalification of indication application 308 active pharmaceutical ingredients 297 Aliskiren/valsartan: withdrawal of New on-line database for WHO marketing authorization application 308 prequalified vaccines 298 Mometasone furoate/formoterol fumarate: withdrawal of marketing Safety and Efficacy Issues authorization application 309 EMA and US FDA extend confidentiality H1N1 influenza vaccine: narcolepsy 299 arrangements indefinitely 309 Statins: interstitial lung disease 299 Tocilizumab: risk of fatal anaphylaxis 300 Recent Publications, Pioglitazone: potential bladder cancer 301 Information and Events Angiotensin receptor blockers and US Government to share patents with cancer: safety review 301 Medicines Patent Pool 310 GnRH agonists, diabetes and cardio- Clinical trials and global medicines vascular disease 301 development 310 Gadolinium-based contrast agents: Evaluation of future nanomedicines 311 kidney dysfunction 302 Reporting on opioid inaccessibility 311 Lamotrigine: aseptic meningitis Tinzaparin sodium: renal Impairment in elderly 303 Consultation Documents Tamoxifen: drug interactions involving The -
Effect of Prostanoids on Human Platelet Function: an Overview
International Journal of Molecular Sciences Review Effect of Prostanoids on Human Platelet Function: An Overview Steffen Braune, Jan-Heiner Küpper and Friedrich Jung * Institute of Biotechnology, Molecular Cell Biology, Brandenburg University of Technology, 01968 Senftenberg, Germany; steff[email protected] (S.B.); [email protected] (J.-H.K.) * Correspondence: [email protected] Received: 23 October 2020; Accepted: 23 November 2020; Published: 27 November 2020 Abstract: Prostanoids are bioactive lipid mediators and take part in many physiological and pathophysiological processes in practically every organ, tissue and cell, including the vascular, renal, gastrointestinal and reproductive systems. In this review, we focus on their influence on platelets, which are key elements in thrombosis and hemostasis. The function of platelets is influenced by mediators in the blood and the vascular wall. Activated platelets aggregate and release bioactive substances, thereby activating further neighbored platelets, which finally can lead to the formation of thrombi. Prostanoids regulate the function of blood platelets by both activating or inhibiting and so are involved in hemostasis. Each prostanoid has a unique activity profile and, thus, a specific profile of action. This article reviews the effects of the following prostanoids: prostaglandin-D2 (PGD2), prostaglandin-E1, -E2 and E3 (PGE1, PGE2, PGE3), prostaglandin F2α (PGF2α), prostacyclin (PGI2) and thromboxane-A2 (TXA2) on platelet activation and aggregation via their respective receptors. Keywords: prostacyclin; thromboxane; prostaglandin; platelets 1. Introduction Hemostasis is a complex process that requires the interplay of multiple physiological pathways. Cellular and molecular mechanisms interact to stop bleedings of injured blood vessels or to seal denuded sub-endothelium with localized clot formation (Figure1).