Preclinical development of Ramizol, an antibiotic belonging to a new class, for the treatment of Clostridium difficile colitis

Shasha Rao, Clive Prestidge, Lynn Miesel, Deb Sweeney, L Shinabarger, Ramiz Boulos

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Antibiotic-resistant bacteria is a major threat to human health and is predicted to become the leading cause of death from disease by 2050. Despite the recent resurgence of research and development in the area, few antibiotics have reached the market, with most of the recently approved antibiotics corresponding to new uses for old antibiotics, or structurally similar derivatives thereof. We have recently reported an in silico approach that led to the design of an entirely new class of antibiotics for the bacteria-specific mechanosensitive ion channel of large conductance: MscL. Here, we present the preclinical development of one such antibiotic, Ramizol, a first generation antibiotic belonging to that class. We present the lack of interaction between Ramizol and other mammalian channels adding credibility to its MscL selectivity. We determine the pharmacokinetic profile in a rat model and show <0.1% of Ramizol is absorbed systemically. We show this non-systemic nature of the antibiotic translates to over 70% survival of hamsters in a Clostridium difficile colitis model. Lastly, initial in vitro data indicate that resistance to Ramizol occurs at a low frequency. In conclusion, we establish the potential of Ramizol as an effective new treatment for C. difficile associated disease.

    Original languageEnglish
    Pages (from-to)879-884
    Number of pages6
    JournalJOURNAL OF ANTIBIOTICS
    Volume69
    Issue number12
    DOIs
    Publication statusE-pub ahead of print - 2016

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