idw – Informationsdienst Wissenschaft

Nachrichten, Termine, Experten

Grafik: idw-Logo
Thema Corona

Imagefilm
Science Video Project
idw-News App:

AppStore



Teilen: 
27.11.2020 11:36

Small molecules control bacterial resistance to antibiotics

Alena Gold Abteilung Hochschulkommunikation/Bereich Presse und Information
Friedrich-Schiller-Universität Jena

    Antibiotics have revolutionized medicine by providing effective treatments for infectious diseases such as cholera. But the pathogens that cause disease are increasingly developing resistance to the antibiotics that are most commonly used. Scientists at the Friedrich Schiller University Jena, Germany have discovered a molecule that influences the antibiotic-resistance of cholera bacteria. They have published their results in the scientific journal “Nature Communications”.

    Antibiotics work in different ways. Some, including penicillin, attack the cell wall of the bacteria by inhibiting their synthesis. But the bacteria are not helpless against this attack. "We have been able to identify a small ribonucleic acid that has a decisive influence on the antibiotic-resistance of the cholera-triggering bacterium Vibrio cholerae," says Kai Papenfort, Professor of General Microbiology at the University of Jena, Germany.

    The protein CrvA is found in the periplasmic space of the bacterium. This lies between the outer cell wall and the basic substance of the cell, the cytoplasm, which is also surrounded by a membrane. There CrvA determines the curvature of the rod-shaped bacterium V. cholerae. "Until now, however, it was not known what controls the activity of this protein. With the small ribonucleic acid VadR we were able to identify a post-transcriptional inhibitor of the synthesis of this protein," says Prof. Papenfort. In contrast to messenger RNA, small ribonucleic acids do not contain any genetic information, but do influence its expression – usually after the DNA has been transcribed into messenger RNA.

    Maintenance of the cell form is crucial for antibiotic resistance

    "Cholera bacteria in which the protein CrvA is not suppressed by VadR show a reduced survival rate on contact with penicillin," says Papenfort. This indicates that the maintenance of the cell form by the small RNA is crucial for antibiotic resistance, the microbiologist adds. The researchers revealed other functions of the small RNA VadR, including the formation of biofilms, which play an important role in the pathogenicity of V. cholerae.

    "VadR is one of many molecules that can intervene in gene expression in V. cholerae. If we understand all these molecules, their functions and their interaction, we can derive new therapeutic approaches. The increasing resistance to antibiotics makes this urgently necessary", says Papenfort, whose research contributes to the Cluster of Excellence „Balance of the Microverse“ at the University of Jena.


    Wissenschaftliche Ansprechpartner:

    Prof. Dr Kai Papenfort
    Chair of General Microbiology & Cluster of Excellence "Balance of the Microverse" of Friedrich Schiller University Jena
    Phone: +49 3641 949311
    E-mail: kai.papenfort[at]uni-jena.de


    Originalpublikation:

    Peschek N, Herzog R, Singh PK, Sprenger M, Meyer F, Fröhlich KS, Schröger L, Bramkamp M, Drescher K, Papenfort K (2020) RNA-mediated control of cell shape modulates antibiotic resistance in Vibrio cholerae, Nature Communications 2020, DOI: 10.1038/s41467-020-19890-8


    Merkmale dieser Pressemitteilung:
    Journalisten, Wissenschaftler
    Biologie, Medizin
    überregional
    Forschungsergebnisse, Wissenschaftliche Publikationen
    Englisch


    Cholera bacteria under the microscope.


    Zum Download

    x

    Prof. Dr Kai Papenfort of the University of Jena.


    Zum Download

    x

    Hilfe

    Die Suche / Erweiterte Suche im idw-Archiv
    Verknüpfungen

    Sie können Suchbegriffe mit und, oder und / oder nicht verknüpfen, z. B. Philo nicht logie.

    Klammern

    Verknüpfungen können Sie mit Klammern voneinander trennen, z. B. (Philo nicht logie) oder (Psycho und logie).

    Wortgruppen

    Zusammenhängende Worte werden als Wortgruppe gesucht, wenn Sie sie in Anführungsstriche setzen, z. B. „Bundesrepublik Deutschland“.

    Auswahlkriterien

    Die Erweiterte Suche können Sie auch nutzen, ohne Suchbegriffe einzugeben. Sie orientiert sich dann an den Kriterien, die Sie ausgewählt haben (z. B. nach dem Land oder dem Sachgebiet).

    Haben Sie in einer Kategorie kein Kriterium ausgewählt, wird die gesamte Kategorie durchsucht (z.B. alle Sachgebiete oder alle Länder).