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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 123 (1985), S. 310-320 
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Cultured bovine endothelial cells were seeded onto the intimal surface of endothelium-denuded rings of canine coronary artery. These rings did not previously relax to acetylcholine, substance P, bradykinin, and A23187. After seeding, the same rings relaxed to bradykinin and A23187, but not to acetycholine or substance P. Indomethacin pretreatment did not affect these responses. Cells from the same source were then grown to confluence on microcarrier beads, poured into small columns, and perfused with Krebs+ solution. The perfusate from the columns was bioassayed on endothelium-denuded rings of coronary artery from either the dog or pig. Challenge of the column in the presence of indomethacin with either bradykinin or A23187 as well as acetylcholine or substance P caused release of a substance that relaxed both types of artery. Its activity half-life was 6.4 ± 0.4 sec at 37°C and it was hydrophilic and negatively charged. Prostacyclin (PGI2) as a candidate for EDRF was ruled out because (1) indomethacin failed to block its release and (2) the pig coronary artery, although insensitive to PGI2, relaxed to the endothelium-derived substance. These results show that, in response to a number of dilator drugs, cultured endothelial cells release a vascular relaxing substance (EDRF) that has characteristics similar to the EDRF of normal endothelium. The chemical nature of EDRF awaits clarification.
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  • 2
    Publication Date: 2015-06-19
    Description: There is an urgent need for new drugs to treat malaria, with broad therapeutic potential and novel modes of action, to widen the scope of treatment and to overcome emerging drug resistance. Here we describe the discovery of DDD107498, a compound with a potent and novel spectrum of antimalarial activity against multiple life-cycle stages of the Plasmodium parasite, with good pharmacokinetic properties and an acceptable safety profile. DDD107498 demonstrates potential to address a variety of clinical needs, including single-dose treatment, transmission blocking and chemoprotection. DDD107498 was developed from a screening programme against blood-stage malaria parasites; its molecular target has been identified as translation elongation factor 2 (eEF2), which is responsible for the GTP-dependent translocation of the ribosome along messenger RNA, and is essential for protein synthesis. This discovery of eEF2 as a viable antimalarial drug target opens up new possibilities for drug discovery.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4700930/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4700930/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Baragana, Beatriz -- Hallyburton, Irene -- Lee, Marcus C S -- Norcross, Neil R -- Grimaldi, Raffaella -- Otto, Thomas D -- Proto, William R -- Blagborough, Andrew M -- Meister, Stephan -- Wirjanata, Grennady -- Ruecker, Andrea -- Upton, Leanna M -- Abraham, Tara S -- Almeida, Mariana J -- Pradhan, Anupam -- Porzelle, Achim -- Martinez, Maria Santos -- Bolscher, Judith M -- Woodland, Andrew -- Norval, Suzanne -- Zuccotto, Fabio -- Thomas, John -- Simeons, Frederick -- Stojanovski, Laste -- Osuna-Cabello, Maria -- Brock, Paddy M -- Churcher, Tom S -- Sala, Katarzyna A -- Zakutansky, Sara E -- Jimenez-Diaz, Maria Belen -- Sanz, Laura Maria -- Riley, Jennifer -- Basak, Rajshekhar -- Campbell, Michael -- Avery, Vicky M -- Sauerwein, Robert W -- Dechering, Koen J -- Noviyanti, Rintis -- Campo, Brice -- Frearson, Julie A -- Angulo-Barturen, Inigo -- Ferrer-Bazaga, Santiago -- Gamo, Francisco Javier -- Wyatt, Paul G -- Leroy, Didier -- Siegl, Peter -- Delves, Michael J -- Kyle, Dennis E -- Wittlin, Sergio -- Marfurt, Jutta -- Price, Ric N -- Sinden, Robert E -- Winzeler, Elizabeth A -- Charman, Susan A -- Bebrevska, Lidiya -- Gray, David W -- Campbell, Simon -- Fairlamb, Alan H -- Willis, Paul A -- Rayner, Julian C -- Fidock, David A -- Read, Kevin D -- Gilbert, Ian H -- 079838/Wellcome Trust/United Kingdom -- 091625/Wellcome Trust/United Kingdom -- 098051/Wellcome Trust/United Kingdom -- 100476/Wellcome Trust/United Kingdom -- R01 AI090141/AI/NIAID NIH HHS/ -- R01 AI103058/AI/NIAID NIH HHS/ -- England -- Nature. 2015 Jun 18;522(7556):315-20. doi: 10.1038/nature14451.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Drug Discovery Unit, Division of Biological Chemistry and Drug Discovery, College of Life Sciences, University of Dundee, Dundee DD1 5EH, UK. ; Department of Microbiology and Immunology, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA. ; Malaria Programme, Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Cambridge CB10 1SA, UK. ; Department of Life Sciences, Imperial College, London SW7 2AZ, UK. ; University of California, San Diego, School of Medicine, 9500 Gilman Drive 0760, La Jolla, California 92093, USA. ; Global Health and Tropical Medicine Division, Menzies School of Health Research, Charles Darwin University, PO Box 41096, Casuarina, Darwin, Northern Territory 0811, Australia. ; Department of Global Health, College of Public Health University of South Florida, 3720 Spectrum Boulevard, Suite 304, Tampa, Florida 33612, USA. ; GlaxoSmithKline, Tres Cantos Medicines Development Campus-Diseases of the Developing World, Severo Ochoa 2, Tres Cantos 28760, Madrid, Spain. ; TropIQ Health Sciences, Geert Grooteplein 28, Huispost 268, 6525 GA Nijmegen, The Netherlands. ; Centre for Drug Candidate Optimisation, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia. ; Eskitis Institute, Brisbane Innovation Park, Nathan Campus, Griffith University, Queensland 4111, Australia. ; Malaria Pathogenesis Laboratory, Eijkman Institute for Molecular Biology, Jalan Diponegoro 69, 10430 Jakarta, Indonesia. ; Medicines for Malaria Venture, PO Box 1826, 20 route de Pre-Bois, 1215 Geneva 15, Switzerland. ; Swiss Tropical and Public Health Institute, Socinstrasse 57, 4051 Basel, Switzerland. ; 1] Global Health and Tropical Medicine Division, Menzies School of Health Research, Charles Darwin University, PO Box 41096, Casuarina, Darwin, Northern Territory 0811, Australia [2] Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford OX3 7LJ, UK. ; 1] Department of Microbiology and Immunology, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA [2] Division of Infectious Diseases, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York 10032, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26085270" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antimalarials/administration & dosage/adverse ; effects/pharmacokinetics/*pharmacology ; Drug Discovery ; Female ; Gene Expression Regulation/*drug effects ; Life Cycle Stages/drug effects ; Liver/drug effects/parasitology ; Malaria/drug therapy/*parasitology ; Male ; Models, Molecular ; Peptide Elongation Factor 2/antagonists & inhibitors/metabolism ; Plasmodium/*drug effects/genetics/growth & development/*metabolism ; Plasmodium berghei/drug effects/physiology ; Plasmodium falciparum/drug effects/metabolism ; Plasmodium vivax/drug effects/metabolism ; Protein Biosynthesis/*drug effects ; Quinolines/administration & dosage/chemistry/pharmacokinetics/*pharmacology
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2010-10-12
    Description: Culex quinquefasciatus (the southern house mosquito) is an important mosquito vector of viruses such as West Nile virus and St. Louis encephalitis virus, as well as of nematodes that cause lymphatic filariasis. C. quinquefasciatus is one species within the Culex pipiens species complex and can be found throughout tropical and temperate climates of the world. The ability of C. quinquefasciatus to take blood meals from birds, livestock, and humans contributes to its ability to vector pathogens between species. Here, we describe the genomic sequence of C. quinquefasciatus: Its repertoire of 18,883 protein-coding genes is 22% larger than that of Aedes aegypti and 52% larger than that of Anopheles gambiae with multiple gene-family expansions, including olfactory and gustatory receptors, salivary gland genes, and genes associated with xenobiotic detoxification.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3740384/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3740384/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Arensburger, Peter -- Megy, Karine -- Waterhouse, Robert M -- Abrudan, Jenica -- Amedeo, Paolo -- Antelo, Beatriz -- Bartholomay, Lyric -- Bidwell, Shelby -- Caler, Elisabet -- Camara, Francisco -- Campbell, Corey L -- Campbell, Kathryn S -- Casola, Claudio -- Castro, Marta T -- Chandramouliswaran, Ishwar -- Chapman, Sinead B -- Christley, Scott -- Costas, Javier -- Eisenstadt, Eric -- Feschotte, Cedric -- Fraser-Liggett, Claire -- Guigo, Roderic -- Haas, Brian -- Hammond, Martin -- Hansson, Bill S -- Hemingway, Janet -- Hill, Sharon R -- Howarth, Clint -- Ignell, Rickard -- Kennedy, Ryan C -- Kodira, Chinnappa D -- Lobo, Neil F -- Mao, Chunhong -- Mayhew, George -- Michel, Kristin -- Mori, Akio -- Liu, Nannan -- Naveira, Horacio -- Nene, Vishvanath -- Nguyen, Nam -- Pearson, Matthew D -- Pritham, Ellen J -- Puiu, Daniela -- Qi, Yumin -- Ranson, Hilary -- Ribeiro, Jose M C -- Roberston, Hugh M -- Severson, David W -- Shumway, Martin -- Stanke, Mario -- Strausberg, Robert L -- Sun, Cheng -- Sutton, Granger -- Tu, Zhijian Jake -- Tubio, Jose Manuel C -- Unger, Maria F -- Vanlandingham, Dana L -- Vilella, Albert J -- White, Owen -- White, Jared R -- Wondji, Charles S -- Wortman, Jennifer -- Zdobnov, Evgeny M -- Birren, Bruce -- Christensen, Bruce M -- Collins, Frank H -- Cornel, Anthony -- Dimopoulos, George -- Hannick, Linda I -- Higgs, Stephen -- Lanzaro, Gregory C -- Lawson, Daniel -- Lee, Norman H -- Muskavitch, Marc A T -- Raikhel, Alexander S -- Atkinson, Peter W -- HHSN266200400001C/PHS HHS/ -- HHSN266200400039C/AI/NIAID NIH HHS/ -- HHSN266200400039C/PHS HHS/ -- N01-AI-30071/AI/NIAID NIH HHS/ -- N01AI30071/AI/NIAID NIH HHS/ -- ZIA AI000810-13/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2010 Oct 1;330(6000):86-8. doi: 10.1126/science.1191864.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Center for Disease Vector Research, University of California Riverside, Riverside, CA 92521, USA. arensburger@gmail.com〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20929810" target="_blank"〉PubMed〈/a〉
    Keywords: Aedes/genetics ; Animals ; Anopheles gambiae/genetics ; Chromosome Mapping ; Chromosomes/*genetics ; Culex/classification/*genetics/physiology ; DNA Transposable Elements ; *Genes, Insect ; *Genome ; Insect Proteins/genetics/physiology ; Insect Vectors/genetics ; Molecular Sequence Data ; Multigene Family ; Phylogeny ; Receptors, Odorant/genetics ; Retroelements ; *Sequence Analysis, DNA
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of Melanin-concentrating hormone (MCH) fragments have been synthesized and their biological activities compared with the parent peptide. The substructural units, 5-14 linear and 5-14 cyclic, have been used as models for MCH -  in 1H-nmr conformational studies. Conformational features predicted by molecular dynamics analyses find support in the nmr experiments.
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  • 5
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Molecular dynamics simulations have been used to search for the accessible conformations of the melanin-concentrationg hormone (MCH). The studies have been performed on native MCH and two of its peptide fragments, a cyclic MCH(5-14) fragment and a linear MCH(5-14) fragment. An analysis of the molecular dynamics trajectories of the three peptides indicates that two regions of the peptide have characteristic conformational properties that may be important for the biological activity. One is a region around Gly8, which is conformationally mobile, and the other is around Pro13, which shows unusual rigidity. The molecular dynamics simulation results are discussed in terms of backbone structural features like β turns, side-chain interactions, and orientations of the disulfide bridge. The results of this analysis are used to suggest new analogues that will modify the conformational features of the peptide and further define the conformational requirements for activity. Finally, the results are related to nmr studies of the peptide and reveal agreements between the experimental nuclear Overhauser effect constraints and some of the accessible conformations obtained from the simulation.
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  • 6
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Enzyme-purified elastin from bovine ligamentum nuchae was digested with elastase in the presence of sodium dodecyl sulfate. Chromatographic fractionation of the digest, after removal of the detergent, resulted in the high-yield isolation of two peptide fractions (F2 and F3) that differed in size and composition. The larger, F2, which accounted for about 55% of the starting material, was subjected to sedimentation-equilibrium analysis in three chaotropic solvents. Comparison of the distribution of point-average molecular weights (Mw and Mz) with protein concentration in the three systems lead to the conclusion that significant self-association of peptides occurred in the absence of 6M guanidinium hydrochloride. In this solvent, the molecular-weight distribution was between 25,000 and 34,000, a range of values in agreement with an intrinisic viscosity of 13.1 cc g-1 determined in the same solvent. Assessment of chain weight by N- and C-terminal analysis was consistent with F2 being a multichain molecule comprising four polypeptide chains linked by three polyfunctional amino acids. Results are interpreted in terms of an anisotropic ultrastructural model of the protein, in which four polypeptide chains constitute the primary filament visualized by electron microscopy in the intact fiber.
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  • 7
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The ion binding characteristics of two bicyclic peptides, cyclo(Lys-Pro-Gly-Pro-Gly-Glu-Pro-Gly-Pro-Gly)-cyclo(1ε → 6γ) Gly (BCP7) and cyclo(Lys-Pro-Gly-Pro-Gly-Glu-Pro-Gly-Pro-Gly)-cyclo(1ε → 6γ) Gly-Gly (BCP8) in a lipophilic solvent, acetonitrile, have been studied using CD and nmr spectroscopy. The data indicate that both BCP7 and BCP8 preferentially bind divalent ions. The nmr data showed that the conformation of both peptides in the free state was an average of many rapidly interconverting conformational states. The nmr titration data for Ca+2 ions with BCP7 and BCP8 indicated that both of these bicyclic peptides bind to calcium ions forming stable 1 : 1 and possibly 1 : 2 Ca+2:BCP-type complexes. The conformation of the Ca+2:BCP7 and Ca+2:BCP8 complexes were similar, with each containing two type I β-turns, one cis X-Pro bond and three trans X-Pro bonds. In the 1 : 1 complex, the Ca+2 ion coordinates to four carbonyl oxygens from the face opposite the bridgehead peptide as well as to two carbonyl oxygens from the interior of the cavity.
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  • 8
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 37 (1995), S. 67-88 
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Since its initial discovery in 1982, growth hormone-releasing factor (GRF) has been the subject of intense investigation. This interest was prompted by the potential application of GRF for Stimulating growth in dwarf humans and for performance enhancement in livestock. Substantial research has been focused upon the development of potent, long-acting analogs as therapeutics. Herein is described a summary of the cumulative efforts of various laboratories endeavoring in this quest. The rationale utilized in GRF analog development is discussed: (1) determination of bioactive core. (2) evaluation of secondary structure, and (3) elucidation of degradation pathways (chemical and enzymatic). Using this information, several series of linear (unnatural and natural sequence) and cyclic GRF analogs were designed, synthesized, and evaluated. Stimulated by the constraints of commercial production, innovative, alternative methods of synthesis were explored: solid-phase, solution-phase, enzymatic, and recombinant. To date, the most promising candidate for drug development is [His1, Val2, Gln8, Ala15, Leu27]-hGRF(1-32)-OH. This natural sequence analog, consisting of rodent and human sequences, incorporates the bioactive core, preferred secondary structure, resistance to chemical and enzymatic degradation: with the added benefit of amenability to large-scale recombinant synthesis. © 1994 John Wiley & Sons, Inc.
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  • 9
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 43 (1997), S. 339-366 
    ISSN: 0006-3525
    Keywords: growth factor receptors ; tyrosine kinase ; transforming growth factor - α ; epidermal growth factor ; neurotrophin ; nerve growth factor ; insulin growth factor ; insulin ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The focus of this review is the relationship between the three-dimensional structure of ligands of the various members of the growth factor receptor tyrosine kinase superfamily and their interaction with the cognate receptor. Particular attention is given to the transforming growth factor - α, epidermal growth factor (EGF); nerve growth factor, neurotrophin; and insulin-like growth factor - 1 (IGF-1), insulin systems since these have been extensively studied in recent years. The three receptor types, which bind these ligands, are the epidermal growth factor receptor family (erb B receptors), the neurotrophin or Trk receptor family, and IGF-1/insulin receptors, respectively, and represent three distinct members of the tyrosine kinase superfamily. For each of these, formation of the ligand-receptor complex initiates the signal transduction cascade through autophosphorylation by the intracellular tyrosine kinase domain. The extracellular portion of the receptor that contains the ligand binding domain in these systems varies significantly in organization in each case. For the EGF receptor system, ligand binding induces homo- and heterodimerization of the receptor leading to activation of the intracellular kinase. For the Trk receptor system, homodimerization of receptors has been shown to occur, although a second receptor, p75, is also required for high affinity binding of neurotrophins and for enhanced sensitivity of tyrosine kinase activation at low ligand concentrations. The IGF-1 and insulin receptors exist as covalent cross-linked dimers where each monomer is composed of two subunits.The aim of this review is also to discuss the mechanism of ligand-receptor interaction for each of these cases; however, since no structural information is yet available for the ligand-receptor complex, the discussion will largely be centered on the molecular requirements of ligand binding. As these receptors are activated through the ligand binding site on the extracellular domain, this represents a possible target for pharmacological intervention by inhibition or stimulation of this portion of the receptor. Thus from a drug design perspective, the focus of this review is to discuss progress in the development of agonists or antagonists of the ligand for these receptors. © 1998 John Wiley & Sons, Inc. Biopoly 43: 339-366, 1997
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  • 10
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Uniform triblock oligomers with a central methylene block and outer oxyethylene blocks terminated by methoxy groups, CH3(OCH2CH2)mO(CH2)n(OCH2CH2)mOCH3 (EmCnEm), were prepared and studied in the solid state by X-ray diffraction, differential scanning calorimetry and Raman spectroscopy. Both fully crystalline and partly-crystalline structures were found, with chains in wholly trans-planar and mixed-trans-planar/helical conformations. Comparison is made with previous results for triblock oligomers of type CnEmCn and diblock oligomers of type CnEm.
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