Selman Waksman and Antibiotics Selman Waksman and Antibiotics

Total Page:16

File Type:pdf, Size:1020Kb

Selman Waksman and Antibiotics Selman Waksman and Antibiotics You are here: » American Chemical Society » Education » Explore Chemistry » Chemical Landmarks » Selman Waksman and Antibiotics Selman Waksman and Antibiotics National Historic Chemical Landmark Dedicated May 24, 2005, at Rutgers The State University of New Jersey. Commemorative Booklet (PDF) Waksman and his students, in their laboratory at Rutgers University, established the first screening protocols to detect antimicrobial agents produced by microorganisms. This deliberate search for chemotherapeutic agents contrasts with the discovery of penicillin, which came through a chance observation by Alexander Fleming, who noted that a mold contaminant on a Petri dish culture had inhibited the growth of a bacterial pathogen. During the 1940s, Waksman and his students isolated more than fifteen antibiotics, the most famous of which was streptomycin, the first effective treatment for tuberculosis. Contents Selman Waksman’s Early Years Waksman Moves to America Waksman’s Research on Actinomycetes, and the Search for Antibiotics The Trials of Streptomycin Bringing Streptomycin to Market Controversy over the Discovery of Streptomycin Selman Waksman’s Later Years Research Notes and Further Reading Landmark Designation and Acknowledgments Cite this Page “Selman Waksman and Antibiotics” commemorative booklet produced by the National Historic Chemical Landmarks program of the American Chemical Society in 2005 (PDF). "The Lord hath created medicines out of the earth; and he that is wise will not abhor them." — Ecclesiasticus, xxxviii, 41 Selman Waksman’s Early Life Selman Waksman called his autobiography My Life with the Microbes. That is also the title of the first chapter of the book, which begins "I have devoted my life to the study of microbes, those infinitesimal forms of life which play such important roles in the life of man, animals, and plants. I have studied their nature, life processes, and their relation to man, helping him and destroying him… I have contemplated the destructive capacities of some microbes and the constructive activities of others. I have tried to find ways and means for discouraging the first and encouraging the second."2 It was a particular kind of microbe found in the soil that intrigued Waksman: the actinomycetes, a group of microorganisms closely related to bacteria. During his long career studying actinomycetes, Waksman realized that many of these microorganisms could inhibit the growth of other microorganisms. That led to the systematic search, starting in the late 1930s, for antimicrobial agents to fight disease, a search made critical by the approach of war. Selman Abraham Waksman was born and raised in the small town of Novaya-Priluka3 in Ukraine on July 22, 1888 (July 8 according to the old Russian calendar). Waksman described his birthplace as "a bleak town, a mere dot in the boundless steppes." In summer the endless fields produced wheat, rye, barley, and oats. In winter the steppes were blanketed in snow. "The earth was black, giving rise to the very name for that type of soil, tchernozem, or black earth. The soil was highly productive, yielding numerous crops, grown continuously for many years, without diminishing returns."4 While the Waksmans were town dwellers, typical of Jews in the Russian Empire, the fertility of the soil no doubt influenced the young boy's later career choice. Waksman was named for Solomon, the Kings of Kings, which in Russia had been corrupted over the centuries to Zolmin. His father, Jacob, was a pious man who earned a modest living renting out small houses he owned in neighboring villages. Tending his properties was not a fulltime job; accordingly, he filled his days with prayer and study in the local synagogue. In his autobiography, Waksman described his father's influence upon him as "that of a storyteller" full of tales of wise men who lived in ancient times and of the long history of the Jewish people. Father and son were not close: "He was always in the shadow and did not play that profound part in the life of my boyhood that fathers usually do in the lives of their sons."5 The formative influences on the young Waksman were his mother, Fraida, and her family. His mother was learned, especially for a woman of that period and place. She knew Yiddish literature, had enough knowledge of Hebrew to read scriptures, and could speak Ukrainian. All that served her well, because shortly after she was married, her husband was conscripted into the army. Forced to be independent, she depended on a small dry goods business for income. This thriving business served not only the town of Novaya-Priluka, but also surrounding villages, to which she transported goods on market days. In time, Fraida's mother and sisters came to live with the family, reinforcing the matriarchal environment in which Selman was raised. Waksman had one sister, Miriam, who died as a young child from diphtheria. She might have survived, but a shipment of antitoxin from Kiev, about two hundred miles away, arrived too late to save her life. Waksman later described how her tragic and unnecessary death influenced him. "As I watched her die," he wrote, "my childish and observant mind may have speculated on the possible effect of the curative agents upon the disease and the potential salvation of her life. Here, for the first time, I was brought in contact with a problem that was later to receive much of my attention."6 At the age of five, Waksman entered the local cheder, or religious school. The education stressed Jewish studies, with the melamed teaching the rudiments of reading scripture and the intricacies of prayer. Within two years, Waksman came under the tutelage of a more advanced teacher who emphasized the prophets and then the Talmud, whose complex interpretations provided the bulk of the intellectual diet. But his mother worried about the limitations of such a parochial education, so she hired private tutors who instructed the ten-year-old boy in Hebrew and Russian as well as literature, history, arithmetic, and geography. While there were holes in his education, Waksman claimed that by the age of thirteen he had a thorough knowledge of biblical and Talmudic writings and of Russian language and literature. In addition to his own studies, Waksman from the age of ten tutored local students, first in the rudiments of reading and writing and later to help prepare the children of the wealthy for entrance into various schools. As a Jew in the waning days of the Russian Empire, Waksman's access to higher education was limited. He was forced to become what was known as an extern, a student who studied with private tutors and then presented himself at a government-run school to take formal examinations. Upon passing this examination a student received a diploma which conferred all the rights and privileges of regular students. This Waksman successfully did in the larger cities of Zhitomir and Odessa. But following the death of his mother, Waksman decided to forego applying to a university in Russia and instead to follow the example of a number of his relatives and immigrate to the United States. This decision was made easier by the deteriorating status of Jews following the abortive 1905 revolution. The Tsarist government responded to this unrest by employing the age-old tactic of diverting attention from the iniquities of Russian society by whipping up anti-Semitic sentiment among the peasantry. The result was a series of pogroms aimed at Jewish life and property. Back to top Waksman Moves to America Waksman sailed to Philadelphia in 1910 and quickly departed for Metuchen, New Jersey, where he moved in with a cousin who had a small truck farm which also had a poultry plant. He spent his first few months in America on the farm, becoming familiar with problems of animal nutrition, composting stable manure, and germinating seeds. This appears to have reinforced his interest in the chemical reactions of living bodies, but he had little idea of how to organize such a study. At the suggestion of his cousin, he visited nearby Rutgers College. There he met Dr. Jacob Lipman, a fellow immigrant from Russia, who advised him to abandon an earlier interest in medical school. Instead, Lipman persuaded him that an agricultural curriculum would provide a better training. He soon enrolled at Rutgers, where he took accelerated course work and spent his fourth year on a research assignment assaying bacteria in culture samples from soil layers. It was while working on this project that Waksman found himself drawn to a particular kind of filamentous bacteria, the actinomycetes. These microorganisms became the focus of his masters' thesis at Rutgers and his doctorate, which he received from the University of California at Berkeley. They were, of course, to be his life's work, although it would be more than two decades before he investigated the possibility of using these microbes to fight other microbes. In 1916 Waksman became a U.S. citizen and married Deborah Mitnick, affectionately known as Boboli; she came from the same village in Ukraine as he. They would eventually have a son, Byron Halsted Waksman, named after one of his Rutgers' mentors. The first two years of their marriage were spent in Berkeley where Waksman supplemented his graduate fellowship with work for an industrial medical organization, Cutter Laboratories. This relationship established a pattern that was to prove useful in the future but which also led to some embarrassment. He returned to Rutgers in 1918 as a Lecturer in Soil Microbiology at the college and Microbiologist at the Agricultural Station. He had asked for this title because he was not so much interested in bacteria as in the fungi and actinomycetes among the microorganisms. The broader description of microbiologist would prove to be more apt than the narrower one of bacteriologist as Waksman began his life's work.
Recommended publications
  • Improving Diagnostic Strategies for Latent Tuberculosis Infection in Populations at Risk for Developing Active Disease
    Improving diagnostic strategies for latent tuberculosis infection in populations at risk for developing active disease Laura Muñoz López Aquesta tesi doctoral està subjecta a la llicència Reconeixement 3.0. Espanya de Creative Commons. Esta tesis doctoral está sujeta a la licencia Reconocimiento 3.0. España de Creative Commons. This doctoral thesis is licensed under the Creative Commons Attribution 3.0. Spain License. UNIVERSIDAD DE BARCELONA Facultad de Medicina IMPROVING DIAGNOSTIC STRATEGIES FOR LATENT TUBERCULOSIS INFECTION IN POPULATIONS AT RISK FOR DEVELOPING ACTIVE DISEASE Memoria presentada por LAURA MUÑOZ LOPEZ Para optar al grado de Doctor en Medicina Barcelona, marzo de 2017 El Dr. Miguel Santín, proFesor asociado de la Facultad de Medicina de la Universidad de Barcelona y Médico Adjunto del Servicio de EnFermedades InFecciosas del Hospital Universitario de Bellvitge, hace constar que la tesis titulada “Improving diagnostic strategies For latent tuberculosis infection in populations at risk for developing active disease” que presenta la licenciada Laura Muñoz, ha sido realizada bajo su dirección en el campus de Bellvitge de la Facultad de Medicina, la considera Finalizada y autoriza su presentación para que sea deFendida ante el tribunal que corresponda. En Barcelona, marzo de 2017 Dr. Miguel Santín A mis padres A mi gran Familia The research presented in this thesis has been carried out thanks to the Fondo de Investigaciones Sanitarias Ministerio de Ciencia e Innovación Beca P-FIS 10/00443 AGRADECIMIENTOS Las primeras palabras de agradecimiento son sin duda para el director de esta tesis. Sin las ideas, horas de trabajo y paciencia de Miguel Santín ninguno de los estudios que componen esta tesis, ni por supuesto la propia tesis, hubiesen visto la luz.
    [Show full text]
  • CHAPTER 104 an ACT Designating Streptomyces Griseus As the New
    CHAPTER 104 AN ACT designating Streptomyces griseus as the New Jersey State Microbe and supplementing chapter 9A of Title 52 of the Revised Statutes. WHEREAS, Streptomyces griseus is a soil-based microorganism that was first discovered in New Jersey in 1916 by Dr. Selman Waksman and Dr. Roland Curtis; and WHEREAS, Soon after its discovery, the microbe drew international acclaim for its groundbreaking use as an antibiotic; and WHEREAS, In 1943, a research team from Rutgers University, led by Dr. Waksman with Albert Schatz and Elizabeth Bugie, used Streptomyces griseus to create streptomycin, the world’s first antibiotic for tuberculosis; and WHEREAS, The original discovery paper for streptomycin, entitled “Streptomycin, a Substance Exhibiting Antibiotic Activity Against Gram-Positive and Gram-Negative Bacteria,” was co- authored by Dr. Waksman, Dr. Schatz, and Elizabeth Bugie, and published in the Proceedings of the Society for Experimental Biology and Medicine; and WHEREAS, After clinical trials showed that streptomycin cured ailing tuberculosis patients, Merck & Company, a New Jersey-based pharmaceutical company, quickly made the drug available to the public; and WHEREAS, Prior to this discovery, tuberculosis was one of the deadliest diseases in human history and the second leading cause of death in the United States; and WHEREAS, Within 10 years of streptomycin’s release, tuberculosis mortality rates in the U.S. fell to a historic low, with only 9.1 tuberculosis-related deaths per 100,000 people in 1955 compared to the rate of 194 deaths per 100,000 people in 1900; and WHEREAS, According to a June 1947 New York Times article, streptomycin had “become one of the two wonder drugs of medicine” and offered the “promise to save more lives than were lost in both World Wars”; and WHEREAS, Dr.
    [Show full text]
  • The Marion County Tuberculosis Association's
    SAVING CHILDREN FROM THE WHITE PLAGUE: THE MARION COUNTY TUBERCULOSIS ASSOCIATION’S CRUSADE AGAINST TUBERCULOSIS, 1911-1936 Kelly Gayle Gascoine Submitted to the faculty of the University Graduate School in partial fulfillment of the requirements for the degree Master of Arts in the Department of History, Indiana University May 2010 Accepted by the Faculty of Indiana University, in partial fulfillment of the requirements for the degree of Master of Arts. ________________________ William H. Schneider, Ph.D., Chair ________________________ Robert G. Barrows, Ph.D. Master’s Thesis Committee ________________________ Stephen J. Jay, M.D. ii Acknowledgments Many people assisted me as I researched and wrote my thesis and I thank them for their support. I would like to thank Dr. Bill Schneider, my thesis chair, for his encouragement and suggestions throughout this past year. Thank you also to the members of my committee, Dr. Bob Barrows and Dr. Stephen Jay, for taking the time to work with me. I would also like to thank the library staff of the Indiana Historical Society for aiding me in my research. iii Contents List of Figures ..................................................................................................................... v Abbreviations ..................................................................................................................... vi Chapter 1: Tuberculosis in America ................................................................................... 1 Chapter 2: The MCTA Sets Up Shop ..............................................................................
    [Show full text]
  • Milestones and Personalities in Science and Technology
    History of Science Stories and anecdotes about famous – and not-so-famous – milestones and personalities in science and technology BUILDING BETTER SCIENCE AGILENT AND YOU For teaching purpose only December 19, 2016 © Agilent Technologies, Inc. 2016 1 Agilent Technologies is committed to the educational community and is willing to provide access to company-owned material contained herein. This slide set is created by Agilent Technologies. The usage of the slides is limited to teaching purpose only. These materials and the information contained herein are accepted “as is” and Agilent makes no representations or warranties of any kind with respect to the materials and disclaims any responsibility for them as may be used or reproduced by you. Agilent will not be liable for any damages resulting from or in connection with your use, copying or disclosure of the materials contained herein. You agree to indemnify and hold Agilent harmless for any claims incurred by Agilent as a result of your use or reproduction of these materials. In case pictures, sketches or drawings should be used for any other purpose please contact Agilent Technologies a priori. For teaching purpose only December 19, 2016 © Agilent Technologies, Inc. 2016 2 Table of Contents The Father of Modern Chemistry The Man Who Discovered Vitamin C Tags: Antoine-Laurent de Lavoisier, chemical nomenclature Tags: Albert Szent-Györgyi, L-ascorbic acid He Discovered an Entire Area of the Periodic Table The Discovery of Insulin Tags: Sir William Ramsay, noble gas Tags: Frederick Banting,
    [Show full text]
  • History of Microbiology Milton Wainwright University of Sheffield Joshua Lederbergl the Rockefeller University
    History of Microbiology Milton Wainwright University of Sheffield Joshua Lederbergl The Rockefeller University I. Observations without Application ness of the nature and etiology of disease, with the II. The Spontaneous Generation Controversy result that the majority of the traditional killer dis- III. Tools of the Trade eases have now been conquered. Similar strides IV. Microorganisms as Causal Agents of have been made in the use of microorganisms in Disease industry. and more recently attempts are being made V. Chemotherapy and Antibiosis to apply our knowledge of microbial ecology and VI. Microbial Metabolism and Applied physiology to help solve environmental problems. A Microbiology dramatic development and broadening of the subject VII. Nutrition, Comparative Biochemistry, and of microbiology has taken place since World War II. Other Aspects of Metabolism Microbial genetics, molecular biology, and bio- VIII. Microbial Genetics technology in particular have blossomed. It is to be IX. Viruses and Lysogeny: The Plasmid hoped that these developments are sufficiently op- Concept portune to enable us to conquer the latest specter of X. Virology disease facing us, namely AIDS. Any account of the XI. Mycology and Protozoology, history of a discipline is. by its very nature, a per- Microbiology’s Cinderellas sonal view: hopefully, what follows includes all the XII. Modern Period major highlights in the development of our science. The period approximating 1930-1950 was a ‘vi- cennium” of extraordinary transformation of micro- Glossary biology, just prior to the landmark publication on the structure of DNA by Watson and Crick in 1953. Antibiotics Antimicrobial agents produced b) We have important milestones for the vicennium: living organisms Jordan and Falk (1928) and “System of Bacteriol- Bacterial genetics Study of genetic elements and ogy” (1930) at its start are magisterial reviews of hereditary in bacteria prior knowledge and thought.
    [Show full text]
  • River Flowing from the Sunrise: an Environmental History of the Lower San Juan
    Utah State University DigitalCommons@USU All USU Press Publications USU Press 2000 River Flowing from the Sunrise: An Environmental History of the Lower San Juan James M. Aton Robert S. McPherson Follow this and additional works at: https://digitalcommons.usu.edu/usupress_pubs Recommended Citation Aton, James M. and McPherson, Robert S., "River Flowing from the Sunrise: An Environmental History of the Lower San Juan" (2000). All USU Press Publications. 128. https://digitalcommons.usu.edu/usupress_pubs/128 This Book is brought to you for free and open access by the USU Press at DigitalCommons@USU. It has been accepted for inclusion in All USU Press Publications by an authorized administrator of DigitalCommons@USU. For more information, please contact [email protected]. River Flowing from the Sunrise An Environmental History of the Lower San Juan A. R. Raplee’s camp on the San Juan in 1893 and 1894. (Charles Goodman photo, Manuscripts Division, Marriott Library, University of Utah) River Flowing from the Sunrise An Environmental History of the Lower San Juan James M. Aton Robert S. McPherson Utah State University Press Logan, Utah Copyright © 2000 Utah State University Press all rights reserved Utah State University Press Logan, Utah 84322-7800 Manfactured in the United States of America Printed on acid-free paper 654321 000102030405 Library of Congress Cataloging-in-Publication Data Aton, James M., 1949– River flowing from the sunrise : an environmental history of the lower San Juan / James M. Aton, Robert S. McPherson. p. cm. Includes bibliographical references and index. ISBN 0-87421-404-1 (alk. paper) — ISBN 0-87421-403-3 (pbk.
    [Show full text]
  • Research Organizations and Major Discoveries in Twentieth-Century Science: a Case Study of Excellence in Biomedical Research
    A Service of Leibniz-Informationszentrum econstor Wirtschaft Leibniz Information Centre Make Your Publications Visible. zbw for Economics Hollingsworth, Joseph Rogers Working Paper Research organizations and major discoveries in twentieth-century science: A case study of excellence in biomedical research WZB Discussion Paper, No. P 02-003 Provided in Cooperation with: WZB Berlin Social Science Center Suggested Citation: Hollingsworth, Joseph Rogers (2002) : Research organizations and major discoveries in twentieth-century science: A case study of excellence in biomedical research, WZB Discussion Paper, No. P 02-003, Wissenschaftszentrum Berlin für Sozialforschung (WZB), Berlin This Version is available at: http://hdl.handle.net/10419/50229 Standard-Nutzungsbedingungen: Terms of use: Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Documents in EconStor may be saved and copied for your Zwecken und zum Privatgebrauch gespeichert und kopiert werden. personal and scholarly purposes. Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle You are not to copy documents for public or commercial Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich purposes, to exhibit the documents publicly, to make them machen, vertreiben oder anderweitig nutzen. publicly available on the internet, or to distribute or otherwise use the documents in public. Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, If the documents have been made available under an Open gelten abweichend von diesen Nutzungsbedingungen die in der dort Content Licence (especially Creative Commons Licences), you genannten Lizenz gewährten Nutzungsrechte. may exercise further usage rights as specified in the indicated licence. www.econstor.eu P 02 – 003 RESEARCH ORGANIZATIONS AND MAJOR DISCOVERIES IN TWENTIETH-CENTURY SCIENCE: A CASE STUDY OF EXCELLENCE IN BIOMEDICAL RESEARCH J.
    [Show full text]
  • June 2021 Issue
    SIMB News News Magazine of the Society for Industrial Microbiology and Biotechnology April/May/June 2021 V.71 N.2 • www.simbhq.org The Microbiology of Sheer Fun A Memorial to Douglas E. Eveleigh RAFT® returns to the Hyatt 2021 RAFT® Chairs: Regency Coconut Point Mark Berge, AstraZeneca November 7–10, 2021 Kat Allikian, Mythic Hyatt Regency Coconut Mushrooms Point, Bonita Springs, FL www.simbhq.org/raft contents 34 CORPORATE MEMBERS SIMB News 35 LETTER FROM THE EDITOR-IN-CHIEF Melanie Mormile | Editor-in-Chief 36 SIMB STRATEGIC PLAN Elisabeth Elder | Associate Editor Kristien Mortelmans | Associate Editor 38 NEWSWORTHY Vanessa Nepomuceno | Associate Editor 44 FEATURE: DESIGN & PRODUCTION Katherine Devins | Production Manager THE MICROBIOLOGY OF SHEER FUN: A MEMORIAL TO DOUGLAS E. EVELEIGH (1933–2019) BOARD OF DIRECTORS President Steve Decker 60 SBFC 2021 RECAP President-elect Noel Fong 61 SIMB ANNUAL MEETING 2021 Past President Jan Westpheling 62 RAFT® 14 2021 Secretary Elisabeth Elder SIMB WORKSHOPS Treasurer Laura Jarboe 64 Directors Rob Donofrio 65 INDUSTRIAL MICROBIOLOGY MEETS THE MICROBIOME (IMMM) 2021 Katy Kao Priti Pharkya 68 BOOK REVIEW: Tiffany Rau CLIMATE CHANGE AND MICROBIAL ECOLOGY: CURRENT RESEARCH HEADQUARTERS STAFF AND FUTURE TRENDS (SECOND EDITION) Christine Lowe | Executive Director Jennifer Johnson | Director of Member Services 71 CALENDAR OF EVENTS Tina Hockaday | Meeting Coordinator Suzannah Citrenbaum | Web Manager 73 SIMB COMMITTEE LIST SIMB CORPORATE MEMBERSHIP APPLICATION EDITORIAL CORRESPONDENCE 75 Melanie R. Mormile Email: [email protected] ADVERTISING For information regarding rates, contact SIMB News 3929 Old Lee Highway, Suite 92A Fairfax, VA 22030-2421 P: 703-691-3357 ext 30 F:703-691-7991 On the cover Email: [email protected] Doug Eveleigh wearing his father’s www.simbhq.org bowler hat while examining lichens SIMB News (ISSN 1043-4976), is published quarterly, one volume per year, by the on a tombstone.
    [Show full text]
  • Biographical Memoir by G E O R G E K
    NATIONAL ACADEMY OF SCIENCES F RANK LAPPIN H O R S F A L L , J R. 1906—1971 A Biographical Memoir by G E O R G E K. H IRST Any opinions expressed in this memoir are those of the author(s) and do not necessarily reflect the views of the National Academy of Sciences. Biographical Memoir COPYRIGHT 1979 NATIONAL ACADEMY OF SCIENCES WASHINGTON D.C. FRANK LAPPIN HORSFALL, JR. December 14,1906-February 19,1971 BY GEORGE K. HIRST RANK L. HORSFALL, JR. was a clinician and a virologist whose Finfluential leadership came primarily through his perceptive scientific experimentation, both in the laboratory and in the clinic, and also through his vast administrative skill. He was born December 14, 1906 in Seattle, Washington, where he spent all his formative years until he was twenty-one. His father, a native Vermonter, was a prominent surgeon who maintained a large house on Capitol Hill, and Frank, the first of four children, was a high-spirited youth whose interests led him into a wide range of activities. By the time he entered high school, he had decided to become an engineer, and he spent afternoons and evenings with a friend rigging up the family Victrola for radio reception. In the course of his four years at high school, he participated actively in the student council, the boys' athletic association, the glee club, and the radio press association. He was valedictorian of his class. During four years of college at the University of Washington he lived in a fraternity house, and during the early part of this experience he was uncharacteristically erratic in the pursuit of his studies.
    [Show full text]
  • René Dubos: Wooing the Earth, from Soil Microbes to Human Ecology
    René Dubos: Wooing the Earth, from Soil Microbes to Human Ecology Carol L. Moberg1 The Rockefeller University, New York, New York, United States Figure 1: René Dubos at home on the woodland property he restored after buying an abandoned farm, Garrison, New York. 7 April 1972 Source: Photograph © Lawrence R. Moberg. René Dubos was an ecologist from the beginning. He championed the philosophy that a living organism—whether a microbe, human being, society, or the Earth itself—could be understood only in its relationships with everything else (Moberg, 2005). Each stage in Dubos’s career broadened his exploration of this philosophy 1 Author contact: [email protected] 65 Human Ecology Review, Volume 23, Number 2, 2017 as he evolved during half a century from studies of soil microbes to promoting a “humanistic biology,” in other words, ecology as a humanistic science. Although unknown to Dubos, the term “humanistic science” was not new. In 1922, Ecology, the Ecological Society of America’s (ESA) journal, published an article by Stephen A. Forbes, “The Humanizing of Ecology,” arguing that economic and humanistic values, with applications of botany, bacteriology, zoology, entomology, and physiology, were all “related to the protection and restoration of health and hence to the prolongation of human life.” Of all the biological sciences, Forbes (1922) wrote, ecology is “the humanistic science par excellence” (pp. 90). For Dubos, the philosophical basis of ecology was health. During his final years, he focused on the human condition and how the world that humans inherit, alter, and leave behind would shape their own health.
    [Show full text]
  • Aplicaciones Biotecnológicas De La Recombinación Homóloga: “Gene Targeting” “Gene Knock Out”
    Aplicaciones biotecnológicas de la recombinación homóloga: “gene targeting” “gene knock out” 1 Aplicaciones de la recombinación homóloga: “gene targeting” Figure 21.4. Gene targeting by homologous recombination can inactivate a predetermined chromosomal gene within an intact cell. (A) Insertion vector method. The introduced vector DNA (blue) is cut at a unique site within a sequence which is identical or closely related to part of a chromosomal gene (black). Homologous recombination (X) can occur, leading to integration of the entire vector sequence including the marker gene (M). Note that the letters do not represent exons but are simply meant to indicate linear order within the gene. (B) Replacement vector method. In this case, the marker gene is contained within the sequence homologous to the endogenous gene, and the vector is cut at a unique location outside the homologous sequence. A double recombination or gene conversion event (X X) can result in replacement of internal sequences within the chromosomal gene by homologous sequences from the vector, including the marker gene. 2 Figure 21.5. Double replacement gene targeting can Doble reemplazo be used to introduce subtle mutations. Both the methods in Figure 21.4 result in introduction of a substantial amount of exogenous sequence within the endogenous gene. To introduce a subtle mutation without leaving residual exogenous sequence, a double replacement method with positive and negative selection can be used (Melton, 1994). Exons in the endogenous gene are represented as numbered large boxes, and introns as long thin boxes. In order to introduce a subtle mutation, such as a single nucleotide substitution in exon 8, a replacement knock-out vector is used with a marker gene (e.g.
    [Show full text]
  • Friend of the Good Earth: [Dr. Reneㄆ Dubos]
    Rockefeller University Digital Commons @ RU Rockefeller University Research Profiles Campus Publications Summer 1989 Friend of the Good Earth: [Dr. ReneÌ Dubos] Carol L. Moberg Follow this and additional works at: http://digitalcommons.rockefeller.edu/research_profiles Part of the Life Sciences Commons Recommended Citation Moberg, Carol L., "Friend of the Good Earth: [Dr. ReneÌ Dubos]" (1989). Rockefeller University Research Profiles. Book 33. http://digitalcommons.rockefeller.edu/research_profiles/33 This Article is brought to you for free and open access by the Campus Publications at Digital Commons @ RU. It has been accepted for inclusion in Rockefeller University Research Profiles by an authorized administrator of Digital Commons @ RU. For more information, please contact [email protected]. THE ROCKEFELLER UNIVERSITY RESEARCH Gramicidin Crystals PROFILES SUMMER 1989 Friend ofthe Good Earth Fifty years ago, microbiologist Rene Dubos taught the world the principles offinding and producing antibiotics. His discovery of gramicidin in 1939, at The Rockefeller Institute for Medical Re­ search, represents the first systematic research and developmentof an antibiotic, from its isolation and purification to an analysis of how it cures disease. Gramicidin and its less pure fonn tyrothricin were the first antibiotics to be produced commercially and used clinically. They fonned the cornerstone in the antibiotic arsenal and remain in use today. This remarkable achievement was not Dubos's first, last, or even his most important contribution. To Rene Dubos, a living Rene Dubas (1901-1982) organism-microbe, man, society, or eanh--eould be under­ stood only in the context of the relationships it forms with everything else. This ecologic view led him from investigating problems ofsoil microbes to those ofspecific infectious diseases, to social aspects of disease, and, finally, to large environmental issues affecting the whole earth.
    [Show full text]