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  • 1
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    Small-molecule inhibitor of Vibrio cholerae virulence and intestinal colonization (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-10-15
    Description: Increasing antibiotic resistance requires the development of new approaches to combating infection. Virulence gene expression in vivo represents a target for antibiotic discovery that has not yet been explored. A high-throughput, phenotypic screen was used to identify a small molecule 4-[N-(1,8-naphthalimide)]-n-butyric acid, virstatin, that inhibits virulence regulation in Vibrio cholerae. By inhibiting the transcriptional regulator ToxT, virstatin prevents expression of two critical V. cholerae virulence factors, cholera toxin and the toxin coregulated pilus. Orogastric administration of virstatin protects infant mice from intestinal colonization by V. cholerae.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hung, Deborah T -- Shakhnovich, Elizabeth A -- Pierson, Emily -- Mekalanos, John J -- AI26289/AI/NIAID NIH HHS/ -- K08 AI060708-01/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2005 Oct 28;310(5748):670-4. Epub 2005 Oct 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Molecular Genetics, Harvard Medical School, 200 Longwood Avenue, Boston, MA 02115, USA. dhung@partners.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16223984" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anti-Bacterial Agents/*pharmacology ; Bacterial Proteins/biosynthesis/drug effects ; Butyrates/*pharmacology ; Cell Line ; Cholera/microbiology ; Cholera Toxin/biosynthesis ; Fimbriae, Bacterial/drug effects ; Gene Expression Regulation, Bacterial/drug effects ; Intestine, Small/*microbiology ; Mice ; Microbial Sensitivity Tests ; Naphthalenes/*pharmacology ; Naphthalimides ; Transcription Factors/biosynthesis/drug effects ; Vibrio cholerae/*drug effects/pathogenicity ; Virulence/drug effects ; Virulence Factors/biosynthesis
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Lysogenic conversion by a filamentous phage encoding cholera toxin (1996)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1996-06-28
    Description: Vibrio cholerae, the causative agent of cholera, requires two coordinately regulated factors for full virulence: cholera toxin (CT), a potent enterotoxin, and toxin-coregulated pili (TCP), surface organelles required for intestinal colonization. The structural genes for CT are shown here to be encoded by a filamentous bacteriophage (designated CTXphi), which is related to coliphage M13. The CTXphi genome chromosomally integrated or replicated as a plasmid. CTXphi used TCP as its receptor and infected V. cholerae cells within the gastrointestinal tracts of mice more efficiently than under laboratory conditions. Thus, the emergence of toxigenic V. cholerae involves horizontal gene transfer that may depend on in vivo gene expression.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Waldor, M K -- Mekalanos, J J -- AI01321/AI/NIAID NIH HHS/ -- AI18045/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1996 Jun 28;272(5270):1910-4.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Molecular Genetics, Shipley Institute of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8658163" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Bacteriophages/*genetics/physiology ; Base Sequence ; Cholera/*microbiology ; Cholera Toxin/*genetics ; DNA Primers ; Digestive System/microbiology ; Fimbriae, Bacterial/physiology/virology ; Gene Expression ; Genes, Bacterial ; *Lysogeny ; Mice ; Molecular Sequence Data ; Morphogenesis ; Mutation ; Transduction, Genetic ; Vibrio cholerae/genetics/*pathogenicity/*virology ; Virulence/genetics
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Selection of bacterial virulence genes that are specifically induced in host tissues (1993)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1993-01-29
    Description: A genetic system was devised that positively selects for bacterial genes that are specifically induced when bacteria infect their host. With the pathogen Salmonella typhimurium, the genes identified by this selection show a marked induction in bacteria recovered from mouse spleen. Mutations in all ivi (in vivo-induced) genes that were tested conferred a defect in virulence. This genetic system was designed to be of general use in a wide variety of bacterial-host systems and has several applications in both vaccine and antimicrobial drug development.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mahan, M J -- Slauch, J M -- Mekalanos, J J -- AI08245/AI/NIAID NIH HHS/ -- AI26289/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1993 Jan 29;259(5095):686-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8430319" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Chromosomes, Bacterial ; Cloning, Molecular ; Genes, Bacterial ; Mice ; Mice, Inbred BALB C ; Mutagenesis ; Recombinant Fusion Proteins/metabolism ; Salmonella Infections, Animal/microbiology ; Salmonella typhimurium/*genetics/*pathogenicity ; Virulence/*genetics ; beta-Galactosidase/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Cholera vaccines: fighting an ancient scourge (1994)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1994-09-02
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mekalanos, J J -- Sadoff, J C -- AI-18045/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 1994 Sep 2;265(5177):1387-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, MA 02115.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/8073279" target="_blank"〉PubMed〈/a〉
    Keywords: Cholera/*prevention & control ; *Cholera Vaccines/adverse effects/immunology ; Humans ; Randomized Controlled Trials as Topic ; Vaccines, Attenuated/adverse effects/immunology ; Vaccines, Inactivated/adverse effects/immunology ; Vaccines, Synthetic/adverse effects/immunology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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