US5153178.Pdf

Total Page:16

File Type:pdf, Size:1020Kb

US5153178.Pdf ||||||||||| USOO5153178A United States Patent (19) 11) Patent Number: 5,153,178 Maroko (45) Date of Patent: * Oct. 6, 1992 54) COMPOSITIONS AND METHOD OF 58) Field of Search ................. 514/280, 284, 821, 26; TREATMENT FOR IMPROVING 424/10 CRCULATORY PERFORMANCE (56) References Cited 76 Inventor: Peter R. Maroko, 1765 Garwood Dr., Cherry Hill, N.J. 08003 U.S. PATENT DOCUMENTS 4,761,417 8/1988 Maroko ............................... 514/284 *) Notice: The portion of the term of this patent subsequent to Aug. 2, 2005 has been Primary Examiner-Frederick E. Waddell disclaimed. Assistant Examiner-Diane Gardner Attorney, Agent, or Firm-Weiser & Stapler 21 Appl. No.: 226,630 57 ABSTRACT 22 Filed: Aug. 1, 1988 Compositions and methods for increasing the contrac tility of the mammalian heart as shown by a positive Related U.S. Application Data inotropic effect are disclosed, employing protoberbe 63 Continuation of Ser. No. 788,507, Oct. 18, 1985, Pat. rine alkaloids such as berberine, discretine, xylopinine, No. 4,761,417. berrberubine, tetrahydropalmatine, and stepharotine in 51 Int, Cl. ................... A61K 31/705; A61K 31/44; combination with cardiac glycosides such as ouabain, A61K 49/OO digoxin, digitoxin, deslanoside and digitalis. 52 U.S. Cl. ...................................... 514/26; 514/280; 514/284; 514/821; 424/10 17 Claims, 17 Drawing Sheets U.S. Patent Oct. 6, 1992 Sheet 4 of 17 5,153,178 ”SOME(SB10NIW)EWIJLt» NOISf^-}NISTOTINILNOO9NIMITOBIVAJLAJVEHNISE9NvHO BQI&JOTHOO8QAHBNIM39839JO Og+ O2+ O2+ ol+ U.S. Patent Oct. 6, 1992 Sheet 5 of 17 5,153,178 EFFECTS OF CONTINUOUS INTRAVENOUS ADMINISTRATION OF BERBERNE HYDROCHLORIDE (O.7mg/kg/min, n=7) -- O sh OO + 90 + 8O - 70 sh 6O 4O N A% + 3O --- 5 O 5 2O 25 3O 35 - 20 a-la HEART RATE v - 3O D----O LV dp/dt mox y a 4O O-O AORTIC FLOW A-a PULSE PRESSURE FIG. 5 U.S. Patent Oct. 6, 1992 Sheet 8 of 17 5,153,178 * BVT001B1N3^133TNOBOIMOTHOOM@AHBNIAJBGJBGJO1034-13 B80SS3\ldOITOLSVIOONE 9"91:099]O d0EATV7 (6Huuuu) U.S. Patent Oct. 6, 1992 Sheet 11 of 17 5,153,178 103333ENIMJ38838-30IMOTHOOMJOAHEQ EXO}JLSNOEWOTOA ENIMEBHB9•|OH TOMINOO[] 2+ V7AS (100g/Iuj) U.S. Patent Oct. 6, 1992 Sheet 12 of 17 5,153,178 {»+£2+|-O]-Ç–çÇ-9- 2]^9|E|(ôHulu)dQBATK7 NO30180THOOMQAHENIMEQJ39-JO1OB-J-JE „3A8nO9NITAJvIS-XINwM3, [OHENIM,30}}E{}e TOHINOO[] |'O+ 2°O- r???????????????????????????????????????????????????????????????????????????????????????????????????????????????n |’O- OOOV7 (NiW/SMJELIT) U.S. Patent Oct. 6, 1992 Sheet 13 of 17 5,153,178 ?y+£2IO-?-t>9 NOBOIJOTHOOM@AHBNIJ38838Jo103333 „BAHÍnO9NITAJV1S-XNvH+, TOMLNOODE ©2-ENIMEEM/38 |+ —r–r??????????????????????????????????????????????????????????????????????????????????n U.S. Patent Oct. 6, 1992 Sheet 14 of 17 5,153,178 STRENUOUS ACT WITY CARDAC STROKE NDEX VOLUME L/min/m2 m / m2 4. 5O - - - rew stre v- now - - - - - - - - - - - - - - - - a . a- - - - - - NORMA ACT WITY 3 REDUCED 2 - - -7--------------- 25- - - - PHYSICAL O ACT WITY 1. L s O CONGESTIVE ot SYMPTOMS ol O O 2O 3O LVEDP, mm Hg FIG. 4 5,153,178 1. 2 ence. For further details relating to disorders of the COMPOSITIONS AND METHOD OF TREATMENT heart, reference is made to Harrison's Principles of Inter FOR IMPROVING CIRCULATORY nal Medicine, Thorne, Adams, Braunwald, Isselbacher PERFORMANCE and Petersdorf, McGraw-Hill Book Company, 8th Ed., Part 7, ("Harrison's') Disease of the Organ Systems, This is a continuation of application Ser. No. 788,507, Disorder of the Heart, Chap. 231 through 248, which are filed Oct. 18, 1985, now U.S. Pat. No. 4,761,47. referred to specifically herein and incorporated herein This invention relates to berberine-type alkaloids, by reference. particularly protoberberine drug compositions and their Reference shall also be made herein to the following use in the treatment and diagnosis of circulatory disor 10 clinical books, namely Veterinary Pharmacology and d ders. The compounds of the invention are of special Therapeutics, Jones, Booth and McDonald, Iowa State interest in prophylactic, therapeutic and other applica University Press, 4th Ed., 1977; Physicians' Desk Refer tions to prevent, minimize, control, alleviate, correct, ence "PDR' Medical Economics Company, 36th Ed. remedy and so on, various disorders or symptoms of 1982; and Veterinary Pharmaceuticals and Biologicals, circulatory disorders, including cardiovascular origins 15 “VPB", 1980/1981, Aronson, Harwal Publishing Com or types. The invention relates in terms of subjects (or pany, Media, Pa., 1980. patients) to the field of mammals, i.e. human and veteri The direct cardiac action of drugs may be divided nary fields. into four major areas: (1) an effedt on contractility (ino The invention also encompasses distinct and valuable tropic effect), reflecting alterations in the myocardial embodiments like compositions (and compounds and force-velocity relation at any given initial muscle methods of use) for chronic and acute heart failure and length; (2) an effect on heart rate expressed as an alter other pathologic states that will benefit from an im ation in the rhythmicity, i.e., the frequency of discharge provement in cardiac performance; for the treatment of of normal pacemaker tissue, generally in the sinoatrial shock (cardiogenic and non-cardiogenic shock); for the node; (3) an effect on conductivity, i.e., on the velocity treatment of arrythmias (whether of natural causes or 25 with which the depolarization wave travels through the caused by a drug); for increasing the usefulness of car myocardium and the atrial ventricular conduction sys diac glycosides (like of the digitalis types) including tem; (4) an effect on irritability, i.e. the tendency to broadening their usually limited therapeutic index; for provoke ectopic pacemaker activity, which is depen controlling or correcting A-V (atrio-ventricular blocks, dent on the rate of diastolic depolarization and the to be defined later herein) block in mammals. 30 threshold potential. The unique, unobvious and remarkable aspects of the One of the most serious consequences of all types of invention are quite numerous and will become apparent cardiovascular diseases involves the pathophysiological hereinafter, but at the outset it is most noteworthy that state in which the heart fails in its prime function as a the compounds of the invention are antiarrhythmo muscle acting as a pump. In general, heart failure is the genic, a remarkable utility in and by itself. Another result of severe primary depression of myocardial con aspect, is that the compounds of the invention have a tractility or extreme ventricular hemodynamic over remarkable combination of beneficial properties, such load combined with secondary diminution of the con as, concurrently, having a positive inotropic effect and tractile state. For a description of the basics and disor being antiarrythmogenic. Another unusual aspect is that ders of the myocardial function, especially cardiac con the compounds of the invention are useful both in acute traction see Harrison's, chapter 236. ventricular failure and also in chronic congestive heart Knowledge of the biochemical and physiological failure. These aspects are of course described in greater changes in heart failure has advanced considerably in detail hereinafter. recent years. Unfortunately, the development of phar The invention also relates to other biochemical or macological agents with clinically useful positive prop biomedical applications. The other aspects, to which 45 erties on cardiac contractility (positive inotropic the invention relates, will become apparent to one of agents) has not kept pace. Nearly two centuries have average skill in the art from the teaching herein. passed since W. Withering described the cardiovascular One important, but not the only important field to effects of Digitalis purpurea in 1787. Since then, the which the invention relates is the cardiovascular field, basic treatment of congestive heart failure remains with both in humans and animals. Today cardiovascular 50 the cardiac glycosides as is described in greater detail diseases, which have reached epidemic proportions, herein. Although literally hundreds of cardiac glyco account for a very high proportion of all deaths in the sides have been investigated, not one has been found world, especially in industrialized nations. Approxi with a wide therapeutic index. The most commonly mately one of every five persons has some form of car used cardiac glycosides digoxin and digitoxin, have a diovascular ailment such as heart disease, cerebrovascu 55 very narrow therapeutic index of less than 2, with life lar disease or hypertension. threatening cardiac arrhythmias as the first manifesta Cardiovascular disease not only is fatal but causes tion of toxicity. It is clear that a cardiotonic agent with prolonged suffering and disability in even a larger pro a wide therapeutic index is needed, especially one that portion of the population. In the United States alone, does not have the drawbacks of the glycosides at all or cardiovascular disease was responsible for almost one has them at least to a milder extent. million fatalities in 1979, well over one-half of all re For the treatment of vascular diseases and the phar ported deaths. Almost 5 million persons afflicted with macology of cardiac glycosides, reference is made here cardiovascular disease are hospitalized annually. The to Braunwald, Chapter 16, pages 515-538; Harrison, cost of this disease in terms of human annual costs due chapter 239, pages 1207-1210 and Goodman and to morbidity amount to over
Recommended publications
  • Pharmacokinetics, Bioavailability and Serum Levels of Cardiac Glycosides
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE JACCVol. 5, No.5 provided by Elsevier - Publisher43A Connector May 1985:43A-50A Pharmacokinetics, Bioavailability and Serum Levels of Cardiac Glycosides THOMAS W. SMITH, MD, FACC Boston. Massachusetts Digoxin, the cardiac glycoside most frequently used in bioavailability of digoxin is appreciably less than that of clinical practice in the United States, can be givenorally digitoxin, averaging about two-thirds to three-fourths of or intravenously and has an excretory half-life of 36 to the equivalent dose given intravenously in the case of 48 hours in patients with serum creatinine and blood currently available tablet formulations. Recent studies urea nitrogen values in the normal range. Sincethe drug have shown that gut ftora of about 10% of patients re­ is excreted predominantly by the kidney, the half-life is duce digoxin to a less bioactive dihydro derivative. This prolonged progressivelywithdiminishingrenal function, process is sensitiveto antibiotic administration, creating reaching about 5 days on average in patients who are the potential for important interactions among drugs. essentially anephric. Serum protein binding of digoxin Serum or plasma concentrations of digitalis glycosides is only about 20%, and differs markedly in this regard can be measured by radioimmunoassay methods that are from that of digitoxin, which is 97% bound by serum nowwidelyavailable, but knowledgeofserum levelsdoes albumin at usual therapeutic levels. Digitoxin is nearly not substitute for a sound working knowledge of the completely absorbed from the normal gastrointestinal clinical pharmacology of the preparation used and care­ tract and has a half-lifeaveraging 5 to 6 days in patients ful patient follow-up.
    [Show full text]
  • Protective Effect of Eicosapentaenoic Acid on Ouabain Toxicity in Neonatal
    Proc. Nati. Acad. Sci. USA Vol. 87, pp. 7834-7838, October 1990 Medical Sciences Protective effect of eicosapentaenoic acid on ouabain toxicity in neonatal rat cardiac myocytes (cardiac glycoside toxicity/w-3 fatty acid effect/cytosolic calcium overload/cardiac antiarrhythmic/Na,K-ATPase inhibition) HAIFA HALLAQ*t, ALOIS SELLMAYERt, THOMAS W. SMITH§, AND ALEXANDER LEAF* *Department of Preventive Medicine, Harvard Medical School and Massachusetts General Hospital, Boston, MA 02114; tInstitut fur Prophylaxe und Epidemiologie der Kreislaufkrankheiten, Universitat Munchen, Pettenkofer Strasse 9, 8000 Munich 2, Federal Republic of Germany; and §Cardiovascular Division, Departments of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02114 Contributed by Alexander Leaf, June 26, 1990 ABSTRACT Isolated neonatal cardiac myocytes have been sarcolemmal membranes of the heart cells. Furthermore, a utilized as a model for the study of cardiac arrhythmogenic prospective randomized clinical trial (7) showed that, among factors. The myocytes respond to the toxic effects of a potent men who had recently suffered a myocardial infarction, those cardiac glycoside, ouabain at 0.1 mM, by an increase in their that were advised to eat fish two or three times a week had spontaneous beating rate and a reduction in amplitude of a 29% reduction in fatal myocardial infarctions over a sub- contractions resulting within minutes in a lethal state of sequent 2-year period compared to those patients not given contracture. Incubating the isolated myocytes for 3-S5 days in such advice. There was, however, no significant difference in culture medium enriched with 5 ,IM arachidonic acid [20:4 cardiac events; those eating fish just did not die as frequently (n-6)] had no effect on the development of lethal contracture of their myocardial infarctions.
    [Show full text]
  • Lanatoside C Induces G2/M Cell Cycle Arrest and Suppresses Cancer Cell Growth by Attenuating MAPK, Wnt, JAK-STAT, and PI3K/AKT/Mtor Signaling Pathways
    biomolecules Article Lanatoside C Induces G2/M Cell Cycle Arrest and Suppresses Cancer Cell Growth by Attenuating MAPK, Wnt, JAK-STAT, and PI3K/AKT/mTOR Signaling Pathways Dhanasekhar Reddy 1 , Ranjith Kumavath 1,* , Preetam Ghosh 2 and Debmalya Barh 3 1 Department of Genomic Science, School of Biological Sciences, Central University of Kerala, Tejaswini Hills, Periya (P.O) Kasaragod 671316, Kerala, India; [email protected] 2 Department of Computer Science, Virginia Commonwealth University, Richmond, VA 23284, USA; [email protected] 3 Centre for Genomics and Applied Gene Technology, Institute of Integrative Omics and Applied Biotechnology (IIOAB), Nonakuri, Purba Medinipur 721172, West Bengal, India; [email protected] * Correspondence: [email protected] or [email protected]; Tel.: +91-8547-648-620 Received: 21 October 2019; Accepted: 22 November 2019; Published: 27 November 2019 Abstract: Cardiac glycosides (CGs) are a diverse family of naturally derived compounds having a steroid and glycone moiety in their structures. CG molecules inhibit the α-subunit of ubiquitous transmembrane protein Na+/K+-ATPase and are clinically approved for the treatment of cardiovascular diseases. Recently, the CGs were found to exhibit selective cytotoxic effects against cancer cells, raising interest in their use as anti-cancer molecules. In this current study, we explored the underlying mechanism responsible for the anti-cancer activity of Lanatoside C against breast (MCF-7), lung (A549), and liver (HepG2) cancer cell lines. Using
    [Show full text]
  • Quo Vadis Cardiac Glycoside Research?
    toxins Review Quo vadis Cardiac Glycoside Research? Jiˇrí Bejˇcek 1, Michal Jurášek 2 , VojtˇechSpiwok 1 and Silvie Rimpelová 1,* 1 Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 5, Prague 6, Czech Republic; [email protected] (J.B.); [email protected] (V.S.) 2 Department of Chemistry of Natural Compounds, University of Chemistry and Technology Prague, Technická 3, Prague 6, Czech Republic; [email protected] * Correspondence: [email protected]; Tel.: +420-220-444-360 Abstract: AbstractCardiac glycosides (CGs), toxins well-known for numerous human and cattle poisoning, are natural compounds, the biosynthesis of which occurs in various plants and animals as a self-protective mechanism to prevent grazing and predation. Interestingly, some insect species can take advantage of the CG’s toxicity and by absorbing them, they are also protected from predation. The mechanism of action of CG’s toxicity is inhibition of Na+/K+-ATPase (the sodium-potassium pump, NKA), which disrupts the ionic homeostasis leading to elevated Ca2+ concentration resulting in cell death. Thus, NKA serves as a molecular target for CGs (although it is not the only one) and even though CGs are toxic for humans and some animals, they can also be used as remedies for various diseases, such as cardiovascular ones, and possibly cancer. Although the anticancer mechanism of CGs has not been fully elucidated, yet, it is thought to be connected with the second role of NKA being a receptor that can induce several cell signaling cascades and even serve as a growth factor and, thus, inhibit cancer cell proliferation at low nontoxic concentrations.
    [Show full text]
  • Studies on Myocardial Metabolism. V. the Effects of Lanatoside-C on the Metabolism of the Human Heart
    STUDIES ON MYOCARDIAL METABOLISM. V. THE EFFECTS OF LANATOSIDE-C ON THE METABOLISM OF THE HUMAN HEART J. M. Blain, … , A. Siegel, R. J. Bing J Clin Invest. 1956;35(3):314-321. https://doi.org/10.1172/JCI103280. Research Article Find the latest version: https://jci.me/103280/pdf STUDIES ON MYOCARDIAL METABOLISM. V. THE EFFECTS OF LANATOSIDE-C ON THE METABOLISM OF THE HUMAN HEART 1 By J. M. BLAIN, E. E. EDDLEMAN, A. SIEGEL, AND R. J. BING (From the Departments of Experimental Medicine and Clinical Physiology, The Medical College of Alabama, Birmingham, Alabama, and the Veterans' Administration Hospital, Birmingham, Ala.) (Submitted for publication Septenber 6, 1955; accepted November 16, 1955) Since 1785 when Withering undertook the first this method should aid in elucidating the meta- systemic study of the effects of digitalis, a large bolic pathways within the heart muscle; thus reac- amount of data has been accumulated describing tions determined by more precise in vitro methods its pharmacological effects. Despite intensive could be re-evaluated in the light of data obtained study, the underlying mechanism responsible for on the human heart in vivo. the beneficial results in patients with heart failure The various cardiac glycosides differ in time of remains obscure. Although digitalis in small doses onset and persistence of action. Lanatoside-C, the may affect the heart rate through its vagal effect, preparation used in this study, is a purified deriva- it is agreed that the predominant action of this tive of digitalis lanata which can be given intra- drug is on the heart muscle directly (1).
    [Show full text]
  • Oleandrin: a Cardiac Glycosides with Potent Cytotoxicity
    PHCOG REV. REVIEW ARTICLE Oleandrin: A cardiac glycosides with potent cytotoxicity Arvind Kumar, Tanmoy De, Amrita Mishra, Arun K. Mishra Department of Pharmaceutical Chemistry, Central Facility of Instrumentation, School of Pharmaceutical Sciences, IFTM University, Lodhipur, Rajput, Moradabad, Uttar Pradesh, India Submitted: 19-05-2013 Revised: 29-05-2013 Published: **-**-**** ABSTRACT Cardiac glycosides are used in the treatment of congestive heart failure and arrhythmia. Current trend shows use of some cardiac glycosides in the treatment of proliferative diseases, which includes cancer. Nerium oleander L. is an important Chinese folk medicine having well proven cardio protective and cytotoxic effect. Oleandrin (a toxic cardiac glycoside of N. oleander L.) inhibits the activity of nuclear factor kappa‑light‑chain‑enhancer of activated B chain (NF‑κB) in various cultured cell lines (U937, CaOV3, human epithelial cells and T cells) as well as it induces programmed cell death in PC3 cell line culture. The mechanism of action includes improved cellular export of fibroblast growth factor‑2, induction of apoptosis through Fas gene expression in tumor cells, formation of superoxide radicals that cause tumor cell injury through mitochondrial disruption, inhibition of interleukin‑8 that mediates tumorigenesis and induction of tumor cell autophagy. The present review focuses the applicability of oleandrin in cancer treatment and concerned future perspective in the area. Key words: Cardiac glycosides, cytotoxicity, oleandrin INTRODUCTION the toad genus Bufo that contains bufadienolide glycosides, the suffix-adien‑that refers to the two double bonds in the Cardiac glycosides are used in the treatment of congestive lactone ring and the ending-olide that denotes the lactone heart failure (CHF) and cardiac arrhythmia.
    [Show full text]
  • Ouabain - the Insulin of the Heart Hauke Fürstenwerth
    Ouabain - The Insulin of the Heart Hauke Fürstenwerth To cite this version: Hauke Fürstenwerth. Ouabain - The Insulin of the Heart. International Journal of Clinical Practice, Wiley, 2010, 64 (12), pp.1591. 10.1111/j.1742-1241.2010.02395.x. hal-00599542 HAL Id: hal-00599542 https://hal.archives-ouvertes.fr/hal-00599542 Submitted on 10 Jun 2011 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. International Journal of Clinical Practice For PeerOuabain – TheReview Insulin of the HeartOnly Journal: International Journal of Clinical Practice Manuscript ID: IJCP-12-09-0760.R1 Manuscript Type: Perspective Date Submitted by the 18-Jan-2010 Author: Complete List of Authors: Fürstenwerth, Hauke; Hauke Fürstenwerth, consultant Specialty area: International Journal of Clinical Practice Page 1 of 9 International Journal of Clinical Practice 1 2 Title: Ouabain – The Insulin of the Heart 3 4 Author: Dr. Hauke Fürstenwerth 5 6 Unterölbach 3A 7 D-51381 Leverkusen 8 Germany 9 Phone: +49-2171-733740 10 e-mail: [email protected] 11 12 corresponding author: Dr.
    [Show full text]
  • Cardiac Glycosides Cause Selective Cytotoxicity in Human Macrophages and Ameliorate White Adipose Tissue Homeostasis
    bioRxiv preprint doi: https://doi.org/10.1101/2020.09.18.293415; this version posted September 18, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Cardiac glycosides cause selective cytotoxicity in human macrophages and ameliorate white adipose tissue homeostasis Antoni Olona1, Charlotte Hateley1, Ana Guerrero2, Jeong-Hun Ko1, Michael R Johnson3, David Thomas1, Jesus Gil2 and Jacques Behmoaras1 1Centre for Inflammatory Disease, Imperial College London, Hammersmith Hospital, Du Cane Road, London W12 0NN, UK. 2MRC London Institute of MediCal SCienCes (LMS), Du Cane Road, London, W12 0NN, UK 3Division of Brain ScienCes, Imperial College London, London, W12 0NN, UK Correspondence: Jacques Behmoaras ([email protected]) 1 bioRxiv preprint doi: https://doi.org/10.1101/2020.09.18.293415; this version posted September 18, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Abstract Cardiac glycosides (CGs) inhibit the Na+,K+-ATPase and are widely prescribed medicines for chronic heart failure and cardiac arrhythmias. Recently, CGs have been described to induce inflammasome activation in human macrophages, suggesting a cytotoxicity that remains to be elucidated in tissues. Here we show that human monocyte-derived macrophages (hMDMs) undergo cell death following incubation with nanomolar concentrations of CGs, and in particular with ouabain (IC50=50 nM). The ouabain-induced cell death is more efficient in hMDMs compared to non-adherent PBMC populations and is through on-target inhibition of Na,K-ATPAse activity, as it causes an intracellular depletion of K+, while inducing accumulation of Na+ and Ca2+ levels.
    [Show full text]
  • Ouabain and Digoxin Activate the Proteasome and the Degradation of the Erα in Cells Modeling Primary and Metastatic Breast Cancer
    cancers Article Ouabain and Digoxin Activate the Proteasome and the Degradation of the ERα in Cells Modeling Primary and Metastatic Breast Cancer 1, 1, 2 3 Claudia Busonero y, Stefano Leone y, Fabrizio Bianchi , Elena Maspero , Marco Fiocchetti 1, Orazio Palumbo 4 , Manuela Cipolletti 1, Stefania Bartoloni 1 and Filippo Acconcia 1,* 1 Department of Sciences, Section Biomedical Sciences and Technology, University Roma Tre, Viale Guglielmo Marconi, 446, I-00146 Rome, Italy; [email protected] (C.B.); [email protected] (S.L.); marco.fi[email protected] (M.F.); [email protected] (M.C.); [email protected] (S.B.) 2 Cancer Biomarkers Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo (FG), Italy; [email protected] 3 Fondazione Istituto FIRC di Oncologia Molecolare (IFOM), 20139 Milan, Italy; [email protected] 4 Division of Medical Genetics, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013 San Giovanni Rotondo (FG), Italy; [email protected] * Correspondence: fi[email protected]; Tel.: +39-065-733-6320; Fax: +39-065-733-6321 These authors contributed equally to this work. y Received: 25 November 2020; Accepted: 17 December 2020; Published: 19 December 2020 Simple Summary: Breast cancer (BC) treatment relies on the detection of the estrogen receptor α (ERα). ERα-expressing BC patients are treated with anti-estrogen drugs (i.e., tamoxifen and fulvestrant). Despite their proven efficacy, these drugs cause serious side effects in a significant fraction of the patients, including both tumor insurgence in secondary organs, and resistant phenotypes, which result in a relapsing disease with scarce treatment options.
    [Show full text]
  • Characterization of the Neutralizing Activity of Digoxin-Specific Fab
    JPET Fast Forward. Published on February 24, 2004 as DOI: 10.1124/jpet.104.065250 JPET FastThis Forward.article has not Published been copyedited on and February formatted. The24, final 2004 version as DOI:10.1124/jpet.104.065250may differ from this version. JPET #65250 1 Characterization of the Neutralizing Activity of Digoxin-specific Fab toward Ouabain-like Steroids Downloaded from Mark A. Pullen, David P Brooks and Richard M. Edwards jpet.aspetjournals.org Department of Renal Biology, GlaxoSmithKline Pharmaceuticals at ASPET Journals on September 26, 2021 King of Prussia PA 19406 Copyright 2004 by the American Society for Pharmacology and Experimental Therapeutics. JPET Fast Forward. Published on February 24, 2004 as DOI: 10.1124/jpet.104.065250 This article has not been copyedited and formatted. The final version may differ from this version. JPET #65250 2 a) Running Title: Characterization of Digoxin-specific Fab b) Mark A. Pullen 709 Swedeland Road, Mail Code UW2521 King of Prussia, PA 19406 Phone (610)-270-4988 Fax (610)-270-5681 Downloaded from [email protected] c) Text: 23 pages Tables: 2 jpet.aspetjournals.org Figures: 5 References: 40 at ASPET Journals on September 26, 2021 Abstract: 174 words Introduction: 575 words Discussion: 1615 words d) Nonstandard abbreviations: EDLF-endogenous digoxin-like factor. e) Recommended section assignment: Cardiovascular JPET Fast Forward. Published on February 24, 2004 as DOI: 10.1124/jpet.104.065250 This article has not been copyedited and formatted. The final version may differ from this version. JPET #65250 3 ABSTRACT Digoxin-specific Fab (Digibind) is a mixture of anti-digoxin Fab fragments prepared from sheep sera and is used as a treatment for digoxin poisoning.
    [Show full text]
  • Ouabain Induces Endocytosis of Plasmalemmal Na/K-Atpase in LLC-PK1 Cells by a Clathrin-Dependent Mechanism
    Kidney International, Vol. 66 (2004), pp. 227–241 Ouabain induces endocytosis of plasmalemmal Na/K-ATPase in LLC-PK1 cells by a clathrin-dependent mechanism JIANG LIU,RIAD KESIRY,SANKARIDRUG M. PERIYASAMY,DEEPAK MALHOTRA,ZIJIAN XIE, and JOSEPH I. SHAPIRO The Departments of Medicine and Pharmacology, Medical College of Ohio, Toledo, Ohio Ouabain induces endocytosis of plasmalemmal Na/K-ATPase topic has fascinated scientists for a number of years [1]. in LLC-PK1 cells by a clathrin-dependent mechanism. In the proximal tubule cell, the Na/K-ATPase resides at Background. We have demonstrated that ouabain causes the basolateral surface, where it provides the force for the dose- and time-dependent decreases in 86Rb uptake in porcine proximal tubular (LLC-PK1) cells. The present study addresses vectorial transport of sodium from the tubular lumen to the molecular mechanisms involved in this process. the blood compartment [2]. The cellular distribution of Methods. Studies were performed with cultured LLC-PK1 the Na/K-ATPase is thought to be crucial for this func- and Src family kinase deficient (SYF) cells. tion. Digoxin and ouabain, substances of plant origin, in- Results. We found that 50 nmol/L ouabain applied to the hibit Na/K-ATPase activity by binding to an extracellular basal, but not apical, aspect for 12 hours caused decreases in the plasmalemmal Na/K-ATPase. This loss of plasmalemmal Na/K- portion of the Na/K-ATPase a-subunit [3]. The fact that ATPase reverses completely within 12 to 24 hours after removal substances of plant origin specifically affect the activity of ouabain.
    [Show full text]
  • Selective Inhibition of Brain Na,K-Atpase by Drugs
    Physiol. Res. 55: 325-338, 2006 Selective Inhibition of Brain Na,K-ATPase by Drugs A. HORVAT, T. MOMIĆ, A. BANJAC, S. PETROVIĆ, G. NIKEZIĆ, M. DEMAJO Laboratory for Molecular Biology and Endocrinology, “Vinča” Institute of Nuclear Sciences, Belgrade, Serbia and Montenegro Received August 27, 2004 Accepted July 18, 2005 On-line available August 5, 2005 Summary The effect of drugs from the class of cardiac (methyldigoxin, verapamil, propranolol), antiepileptic (carbamazepine), sedative (diazepam) and antihistaminic (promethazine) drugs on Na,K-ATPase activity of plasma membranes was studied in rat brain synaptosomes. Methyldigoxin in a concentration of 0.1 mmol/l inhibits enzyme activity by 80 %. Verapamil, propranolol and promethazine in concentrations of 20, 20 and 2 mmol/l respectively, entirely inhibit the ATPase activity. Carbamazepine and diazepam in concentrations of 0.02-60 mmol/l have no effect on the activity of this enzyme. According to the drug concentrations that inhibit 50 % of enzyme activity (IC50), the potency can be listed in the following order: methyldigoxin >> promethazine > verapamil ≥ propranolol. From the inhibition of commercially available purified Na,K-ATPase isolated from porcine cerebral cortex in the presence of chosen drugs, as well as from kinetic studies on synaptosomal plasma membranes, it may be concluded that the drugs inhibit enzyme activity, partly by acting directly on the enzyme proteins. Propranolol, verapamil and promethazine inhibitions acted in an uncompetitive manner. The results suggest that these three drugs may contribute to neurological dysfunctions and indicate the necessity to take into consideration the side effects of the investigated drugs during the treatment of various pathological conditions.
    [Show full text]