Quantitative Structure-Activity Relationships (QSAR) and Pesticides
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MM Matin et al. Medical Research Archives vol 8 issue 7. Medical Research Archives RESEARCH ARTICLE 2e`1 PASS Predication, Antiviral, in vitro Antimicrobial, and ADMET Studies of Rhamnopyranoside Esters Authors Mohammed M Matin1, Mohammad HO Roshid2, Sreebash C Bhattacharjee3 and Abul KMS Azad4 Affiliations 1 Bioorganic & Medicinal Chemistry Laboratory, Department of Chemistry, University of Chittagong, Chattogram-4331, Bangladesh 2 Department of Anaesthesia and Intensive Care Medicine, Chattogram Medical College, Chattogram- 4203, Bangladesh 3 Chemical Research Division, Bangladesh Council of Scientific & Industrial Research (BCSIR) Laboratories, Chattogram-4220, Bangladesh 4 Department of Chemistry, Chattogram Govt. College, Chattogram-4203, Bangladesh Corresponding Author: MM Matin E-mail address: [email protected] Tel.: +88 01716 839689. Abstract Sugar derived esters (SEs) with potential antimicrobial activity were found to be a better choice to solve the multidrug resistant (MDR) pathogens due to improved antimicrobial efficacy, biodegradability, non-toxic, and non-allergic properties. In this context, a series of benzyl -L- rhamnopyranoside esters with different chain length (C2-C18) were employed for PASS predication, antiviral, and in vitro antimicrobial activity test. The in vitro antimicrobial tests against four bacterial, and four fungal pathogens along with PASS predication indicated that these sugar esters acted as better antifungals as compared to antibacterial functionality. The study revealed that the incorporation of octanoyl (C8) and lauroyl (C12) group(s) at C-3 position of rhamnopyranoside possessed promising antimicrobial, and anti-carcinogenic potentiality with good pharmacokinetic (pkCSM), and drug likeness properties. Also, attachment of multiple ester groups enhanced various drug likeness, and medicinal chemistry friendliness conditions. Overall, the present findings might be useful for the development of rhamnopyranoside based novel MDR antimicrobial drugs. -
The Role of Omics in the Application of Adverse Outcome Pathways for Chemical Risk Assessment Erica K
TOXICOLOGICAL SCIENCES, 158(2), 2017, 252–262 doi: 10.1093/toxsci/kfx097 Advance Access Publication Date: May 19, 2017 Forum FORUM The Role of Omics in the Application of Adverse Outcome Pathways for Chemical Risk Assessment Erica K. Brockmeier,* Geoff Hodges,†,1 Thomas H. Hutchinson,‡ Emma Butler,† Markus Hecker,§ Knut Erik Tollefsen,¶ Natalia Garcia-Reyero,k,kj Peter Kille,kk Do¨ rthe Becker,# Kevin Chipman,# John Colbourne,# Timothy W. Collette,** Andrew Cossins,* Mark Cronin,†† Peter Graystock,a Steve Gutsell,† Dries Knapen,b Ioanna Katsiadaki,c Anke Lange,d Stuart Marshall,† Stewart F. Owen,e Edward J. Perkins,k Stewart Plaistow,* Anthony Schroeder,f Daisy Taylor,g Mark Viant,# Gerald Ankley,h and Francesco Falciani* *Institute of Integrative Biology, University of Liverpool, Liverpool L69 7ZB, UK; †Safety and Environmental Assurance Centre, Unilever, Colworth Science Park, Sharnbrook MK44 1LQ, UK; ‡School of Biological Sciences, University of Plymouth, Plymouth, Devon PL4 8AA, UK; §Toxicology Centre and School of the Environment and Sustainability, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5B3, Canada; ¶Norwegian Institute for Water Research (NIVA), N-0349 Oslo, Norway; kUS Army Engineer Research and Development Center, Vicksburg, Mississippi; kjMississippi State University, Institute for Genomics, Biocomputing and Biotechnology, Starkville, Mississippi; kkCardiff School of Biosciences, University of Cardiff, Cardiff CF10 3AT, UK; #School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK; -
B-Lactams: Chemical Structure, Mode of Action and Mechanisms of Resistance
b-Lactams: chemical structure, mode of action and mechanisms of resistance Ru´ben Fernandes, Paula Amador and Cristina Prudeˆncio This synopsis summarizes the key chemical and bacteriological characteristics of b-lactams, penicillins, cephalosporins, carbanpenems, monobactams and others. Particular notice is given to first-generation to fifth-generation cephalosporins. This review also summarizes the main resistance mechanism to antibiotics, focusing particular attention to those conferring resistance to broad-spectrum cephalosporins by means of production of emerging cephalosporinases (extended-spectrum b-lactamases and AmpC b-lactamases), target alteration (penicillin-binding proteins from methicillin-resistant Staphylococcus aureus) and membrane transporters that pump b-lactams out of the bacterial cell. Keywords: b-lactams, chemical structure, mechanisms of resistance, mode of action Historical perspective Alexander Fleming first noticed the antibacterial nature of penicillin in 1928. When working with Antimicrobials must be understood as any kind of agent another bacteriological problem, Fleming observed with inhibitory or killing properties to a microorganism. a contaminated culture of Staphylococcus aureus with Antibiotic is a more restrictive term, which implies the the mold Penicillium notatum. Fleming remarkably saw natural source of the antimicrobial agent. Similarly, under- the potential of this unfortunate event. He dis- lying the term chemotherapeutic is the artificial origin of continued the work that he was dealing with and was an antimicrobial agent by chemical synthesis [1]. Initially, able to describe the compound around the mold antibiotics were considered as small molecular weight and isolates it. He named it penicillin and published organic molecules or metabolites used in response of his findings along with some applications of penicillin some microorganisms against others that inhabit the same [4]. -
An Indexing and Classification System for Earth-Science Data Bases
AN INDEXING AND CLASSIFICATION SYSTEM FOR EARTH-SCIENCE DATA BASES By James C. Schornick, Janet B. Pruitt, Helen E. Stranathan, and Albert C. Duncan U.S. GEOLOGICAL SURVEY Open-File Report 89 47 Reston, Virginia 1989 DEPARTMENT OF THE INTERIOR MANUEL LUJAN, JR., Secretary U.S. GEOLOGICAL SURVEY Dallas L. Peck, Director For additional information Copies of this report can write to: be purchased from: Assistant Chief Hydrologist for U.S. Geological Survey Scientific Information Management Books and Open-File Reports Section U.S. Geological Survey Federal Center, Building 810 440 National Center Box 25425 Reston, Virginia 22092 Denver, Colorado 80225 CONTENTS Page Abstract ............................................................ 1 Introduction ........................................................ 1 Objective of the indexing and classification system .............. 2 Scope of the indexing and classification system .................. 2 The indexing and classification system .............................. 2 The sample medium component ...................................... 3 The general physical/chemical component .......................... 6 The specific physical/chemical component ......................... 6 Organic substances ............................................ 7 Biological taxa ............................................... 8 The indexing and classification code ............................. 9 Data base availability .............................................. 11 Summary ............................................................ -
Challenging the Drug-Likeness Dogma for New Drug Discovery in Tuberculosis
REVIEW published: 03 July 2018 doi: 10.3389/fmicb.2018.01367 Challenging the Drug-Likeness Dogma for New Drug Discovery in Tuberculosis Diana Machado 1, Miriam Girardini 2, Miguel Viveiros 1* and Marco Pieroni 2* 1 Global Health and Tropical Medicine, GHTM, Instituto de Higiene e Medicina Tropical, IHMT, Universidade Nova de Lisboa, UNL, Lisbon, Portugal, 2 P4T Group, Department of Food and Drug, University of Parma, Parma, Italy The emergence of multi- and extensively drug resistant tuberculosis worldwide poses a great threat to human health and highlight the need to discover and develop new, effective and inexpensive antituberculosis agents. High-throughput screening assays Edited by: against well-validated drug targets and structure based drug design have been employed Fernando Rogerio Pavan, to discover new lead compounds. However, the great majority fail to demonstrate any Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP), Brazil antimycobacterial activity when tested against Mycobacterium tuberculosis in whole-cell Reviewed by: screening assays. This is mainly due to some of the intrinsic properties of the bacilli, Pedro Almeida Silva, such as the extremely low permeability of its cell wall, slow growth, drug resistance, Fundação Universidade Federal do drug tolerance, and persistence. In this sense, understanding the pathways involved Rio Grande, Brazil Luiz Augusto Basso, in M. tuberculosis drug tolerance, persistence, and pathogenesis, may reveal new Pontifícia Universidade Católica do Rio approaches for drug development. Moreover, the need for compounds presenting a Grande do Sul, Brazil novel mode of action is of utmost importance due to the emergence of resistance not *Correspondence: Miguel Viveiros only to the currently used antituberculosis agents, but also to those in the pipeline. -
Mechanisms of Action for Small Molecules Revealed by Structural Biology in Drug Discovery
International Journal of Molecular Sciences Review Mechanisms of Action for Small Molecules Revealed by Structural Biology in Drug Discovery Qingxin Li 1,* and CongBao Kang 2,* 1 Guangdong Provincial Engineering Laboratory of Biomass High Value Utilization, Guangdong Provincial Bioengineering Institute (Guangzhou Sugarcane Industry Research Institute), Guangdong Academy of Sciences, Guangzhou 510316, China 2 Experimental Drug Development Centre (EDDC), Agency for Science, Technology and Research (A*STAR), 10 Biopolis Road, Chromos, #05-01, Singapore 138670, Singapore * Correspondence: [email protected] (Q.L.); [email protected] (C.K.); Tel.: +86-020-84168436 (Q.L.); +65-64070602 (C.K.) Received: 12 June 2020; Accepted: 20 July 2020; Published: 24 July 2020 Abstract: Small-molecule drugs are organic compounds affecting molecular pathways by targeting important proteins. These compounds have a low molecular weight, making them penetrate cells easily. Small-molecule drugs can be developed from leads derived from rational drug design or isolated from natural resources. A target-based drug discovery project usually includes target identification, target validation, hit identification, hit to lead and lead optimization. Understanding molecular interactions between small molecules and their targets is critical in drug discovery. Although many biophysical and biochemical methods are able to elucidate molecular interactions of small molecules with their targets, structural biology is the most powerful tool to determine the mechanisms of action for both targets and the developed compounds. Herein, we reviewed the application of structural biology to investigate binding modes of orthosteric and allosteric inhibitors. It is exemplified that structural biology provides a clear view of the binding modes of protease inhibitors and phosphatase inhibitors. -
Polymer-Drug Conjugate, a Potential Therapeutic to Combat Breast and Lung Cancer
pharmaceutics Review Polymer-Drug Conjugate, a Potential Therapeutic to Combat Breast and Lung Cancer Sibusiso Alven, Xhamla Nqoro , Buhle Buyana and Blessing A. Aderibigbe * Department of Chemistry, University of Fort Hare, Alice Eastern Cape 5700, South Africa; [email protected] (S.A.); [email protected] (X.N.); [email protected] (B.B.) * Correspondence: [email protected] Received: 24 November 2019; Accepted: 30 December 2019; Published: 29 April 2020 Abstract: Cancer is a chronic disease that is responsible for the high death rate, globally. The administration of anticancer drugs is one crucial approach that is employed for the treatment of cancer, although its therapeutic status is not presently satisfactory. The anticancer drugs are limited pharmacologically, resulting from the serious side effects, which could be life-threatening. Polymer drug conjugates, nano-based drug delivery systems can be utilized to protect normal body tissues from the adverse side effects of anticancer drugs and also to overcome drug resistance. They transport therapeutic agents to the target cell/tissue. This review article is based on the therapeutic outcomes of polymer-drug conjugates against breast and lung cancer. Keywords: breast cancer; lung cancer; chemotherapy; polymer-based carriers; polymer-drug conjugates 1. Introduction Cancer is a chronic disease that leads to great mortality around the world and cancer cases are rising continuously [1]. It is the second cause of death worldwide, followed by cardiovascular diseases [2]. It is characterized by an abnormal uncontrolled proliferation of any type of cells in the human body [3]. It is caused by external factors, such as smoking, infectious organisms, pollution, and radiation; it is also caused by internal factors, such as immune conditions, hormones, and genetic mutation [3]. -
In Vitro Assessment of Modes of Toxic Action of Pharmaceuticals In
Environ. Sci. Technol. 2005, 39, 3090-3100 photosynthesis inhibition assay, agreement between In Vitro Assessment of Modes of experimental results and prediction was best for two- Toxic Action of Pharmaceuticals in stage predictions considering the assigned modes of action. In a two-stage prediction, concentration addition was Aquatic Life used as a model to predict the mixture effect of the baseline toxicants followed by their independent action as a BEATE I. ESCHER,* NADINE BRAMAZ, single component combined with the specifically acting RIK I. L. EGGEN, AND compound propranolol and the reference compound diuron. MANUELA RICHTER A comparison with acute toxicity data for algae, daphnia, Swiss Federal Institute for Environmental Science and and fish showed generally good agreement for the Technology (EAWAG), CH-8600 DuÈbendorf, Switzerland nonspecifically acting compounds but also that the proposed test battery offered better diagnostic value in the case of the specifically acting compounds. An ecotoxicological test battery based on a mode-of- action approach was designed and applied to the hazard identification and classification of modes of action of Introduction six pharmaceuticals (carbamazepine, diclofenac, ethinyl Pharmaceuticals and their metabolites are ubiquitous in the estradiol, ibuprofen, propranolol, and sulfamethoxazole). The environment. Most of them are neither truly persistent nor rationale behind the design of the battery was to cover highly bioaccumulative and many, but not all, are quite well the relevant interactions that a compound may have with eliminated in wastewater treatment plants. However, they biological targets. It is thus not comprehensive but are continuously emitted into the wastewater streams and contains representative examples of each category of therefore contribute to the burden of chemical pollutants mode of toxic action including nonspecific, specific, and even though their concentrations in receiving water are quite reactive toxicity. -
Quantification of the Membrane Toxicity of Hydrophobic Ionogenic Organic Compounds (Hiocs): Role of Uptake and Speciation for Single Compounds and Binary Mixtures
Diss. ETH No. 14066 Quantification of the membrane toxicity of hydrophobic ionogenic organic compounds (HIOCs): Role of uptake and speciation for single compounds and binary mixtures René W. Hunziker Zürich, 2001 Diss. ETH No. 14066 Quantification of the membrane toxicity of hydrophobic ionogenic organic compounds (HIOCs): Role of uptake and speciation for single compounds and binary mixtures A dissertation submitted to the Swiss Federal Institute of Technology Zürich for the degree of Doctor of Natural Sciences Presented by René W. Hunziker Dipl. Natw. ETH born October 10th, 1968 citizen of Moosleerau (AG) Accepted on the recommendation of Prof. Dr. R.P. Schwarzenbach, examiner Prof. Dr. U.P. Fringeli, co-examiner Dr. R. Altenburger, co-examiner Dr. B.I. Escher, co-examiner Zürich, 2001 Table of contents Summary............................................................................................................................................. VII Zusammenfassung............................................................................................................................ IX 1. General introduction................................................................................................................... 1 1.1 Biomembranes as site of toxic action................................................................................. 2 1.2 Membrane toxicity of hydrophobic ionogenic organic compounds (HIOC) .............. 4 1.3 Objectives.............................................................................................................................. -
What Is Medicinal Chemistry
Unit 1 Prepared By: Neetu Sabarwal Department of Pharmaceutical Chemistry SOS Pharmaceutical Sciences Jiwaji University. Gwalior Content INTRODUCTION TO MEDICINAL CHEMISTRY • History and development of medicinal chemistry Physicochemical properties in relation to biological action • Ionization, Solubility, Partition Coefficient, Hydrogen bonding, Protein binding, Chelation, • Bioisosterism, Optical and Geometrical isomerism. Drug metabolism • Drug metabolism principles- Phase I and Phase II. • Factors affecting drug metabolism including stereo chemical aspects. CHEMISTRY What is Chemistry? • Chemistry is known as the central of science. • It is a branch of physical science that studies the composition, structure, properties and changes of matter. • MATTER = Solid / Liquid/ Gas. BRANCHES OF CHEMISTRY PHYSICAL CHEMISTRY • the branch of chemistry concerned with the application of the techniques and theories of physics to the study of chemical systems. • Branches : chemical Kinetics, Electrochemistry, spectroscopy, photochemistry. INORGANIC CHEMISTRY • deals with the synthesis and behaviour of inorganic and organometallic compounds • Branches :Bioinorganic, Cluster, Material & Nuclear Chemistry ORGANIC CHEMISTRY • study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms. • Branches : Biochemistry, biophysical, Biorganic, P’ceutical, Medicinal WHAT IS MEDICINAL CHEMISTRY • It is a discipline or intersection of chemistry especially synthetic organic -
Targeting Drug Delivery with Light: a Highly Focused Approach
Advanced Drug Delivery Reviews 171 (2021) 94–107 Contents lists available at ScienceDirect Advanced Drug Delivery Reviews journal homepage: www.elsevier.com/locate/addr Targeting drug delivery with light: A highly focused approach Teresa L. Rapp a,ColeA.DeForesta,b,c,d,e,⁎ a Department of Chemical Engineering, University of Washington, Seattle, WA 98105, USA b Department of Bioengineering, University of Washington, Seattle, WA 98105, USA c Department of Chemistry, University of Washington, Seattle, WA 98105, USA d Institute of Stem Cell & Regenerative Medicine, University of Washington, Seattle, WA 98109, USA e Molecular Engineering & Sciences Institute, University of Washington, Seattle, WA 98105, USA article info abstract Article history: Light is a uniquely powerful tool for controlling molecular events in biology. No other external input (e.g., heat, Received 16 October 2020 ultrasound, magnetic field) can be so tightly focused or so highly regulated as a clinical laser. Drug delivery vehi- Received in revised form 4 January 2021 cles that can be photonically activated have been developed across many platforms, from the simplest “caging” of Accepted 8 January 2021 therapeutics in a prodrug form, to more complex micelles and circulating liposomes that improve drug uptake Available online 22 January 2021 and efficacy, to large-scale hydrogel platforms that can be used to protect and deliver macromolecular agents in- cluding full-length proteins. In this Review, we discuss recent innovations in photosensitive drug delivery and Keywords: Photochemistry highlight future opportunities to engineer and exploit such light-responsive technologies in the clinical setting. Photoactivated ©2021ElsevierB.V.Allrightsreserved. Light-mediated delivery In vivo drug delivery Photodegradable hydrogels Photoresponsive nanoparticles Prodrugs Dual-action Photoswitches Contents 1. -
Defining the Role of Chemical Activity in Environmental Risk Assessment Within the Context of Mode of Action: Practical Guidance and Advice
Defining the role of chemical activity in environmental risk assessment within the context of mode of action: Practical guidance and advice 29-30 October 2015 Snowbird, Utah, USA Workshop Report No. 29 Jointly organised by and European Centre for Ecotoxicology RIFM (Research Institute for and Toxicology of Chemicals Fragrance Materials) EUROPEAN CENTRE FOR ECOTOXICOLOGY AND TOXICOLOGY OF CHEMICALS Defining the role of chemical activity in environmental risk assessment within the context of mode of action: Practical guidance and advice 29-30 October 2015 Snowbird, Utah, USA Workshop Report No. 29 Jointly organised by and European Centre for Ecotoxicology RIFM (Research Institute for and Toxicology of Chemicals Fragrance Materials) Brussels, August 2016 ISSN-2078-7219-29 (online) Defining the role of chemical activity in environmental risk assessment within the context of mode of action: Practical guidance and advice ECETOC Workshop Report No. 29 © Copyright – ECETOC AISBL European Centre for Ecotoxicology and Toxicology of Chemicals 2 Avenue E. Van Nieuwenhuyse (Bte. 8), B-1160 Brussels, Belgium. All rights reserved. No part of this publication may be reproduced, copied, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior written permission of the copyright holder. Applications to reproduce, store, copy or translate should be made to the Secretary General. ECETOC welcomes such applications. Reference to the document, its title and summary may be copied or abstracted in data retrieval systems without subsequent reference. The content of this document has been prepared and reviewed by experts on behalf of ECETOC with all possible care and from the available scientific information.