2. Academic Validation
  3. The small-molecule SMARt751 reverses Mycobacterium tuberculosis resistance to ethionamide in acute and chronic mouse models of tuberculosis

The small-molecule SMARt751 reverses Mycobacterium tuberculosis resistance to ethionamide in acute and chronic mouse models of tuberculosis

  • Sci Transl Med. 2022 May 4;14(643):eaaz6280. doi: 10.1126/scitranslmed.aaz6280.
Marion Flipo 1,  Rosangela Frita 2,  Marilyne Bourotte 1 3,  María S Martínez-Martínez 4,  Markus Boesche 5,  Gary W Boyle 6,  Geo Derimanov 7,  Gerard Drewes 5,  Pablo Gamallo 4,  Sonja Ghidelli-Disse 5,  Stephanie Gresham 6,  Elena Jiménez 4,  Jaime de Mercado 4,  Esther Pérez-Herrán 4,  Esther Porras-De Francisco 4,  Joaquín Rullas 4,  Patricia Casado 4,  Florence Leroux 1 8,  Catherine Piveteau 1,  Mehdi Kiass 9,  Vanessa Mathys 9,  Karine Soetaert 9,  Véronique Megalizzi 10,  Abdalkarim Tanina 10,  René Wintjens 10,  Rudy Antoine 2,  Priscille Brodin 2 8,  Vincent Delorme 2,  Martin Moune 2,  Kamel Djaout 2,  Stéphanie Slupek 2,  Christian Kemmer 11,  Marc Gitzinger 11,  Lluis Ballell 4,  Alfonso Mendoza-Losana 4,  Sergio Lociuro 11,  Benoit Deprez 1 8,  David Barros-Aguirre 4,  Modesto J Remuiñán 4,  Nicolas Willand 1,  Alain R Baulard 2 8
Affiliations

Affiliations

  • 1 Univ. Lille, Inserm, Institut Pasteur de Lille, U1177 - Drugs and Molecules for living Systems, F-59000 Lille, France.
  • 2 Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, U1019 - UMR9017 - CIIL - Center for Infection and Immunity of Lille, F-59000 Lille, France.
  • 3 BioVersys SAS, Lille, France.
  • 4 GSK, Tres Cantos R&D, PTM, Tres Cantos, 28760 Madrid, Spain.
  • 5 Cellzome GmbH . A GSK Company, 69117 Heidelberg, Germany.
  • 6 GSK, David Jack Centre for R&D, Park Road, Ware, Hertfordshire SG12 ODP, UK.
  • 7 GSK, Clinical Pharmacology and Experimental Medicine, 1250 South Collegeville Road, Collegeville, PA 19426, USA.
  • 8 Univ. Lille, CNRS, Inserm, CHU Lille, Institut Pasteur de Lille, US 41 - UAR 2014 - PLBS, F-59000 Lille, France.
  • 9 National Reference Center for Tuberculosis and Mycobacteria, Sciensano, Brussels, Belgium.
  • 10 Microbiology, Bioorganic and Macromolecular Chemistry, Facult. de Pharmacie, Universit. Libre de Bruxelles, Brussels, Belgium.
  • 11 BioVersys AG, Basel, Switzerland.
PMID: 35507672 DOI: 10.1126/scitranslmed.aaz6280
Abstract

The sensitivity of Mycobacterium tuberculosis, the pathogen that causes tuberculosis (TB), to Antibiotic prodrugs is dependent on the efficacy of the activation process that transforms the prodrugs into their active Antibacterial moieties. Various oxidases of M. tuberculosis have the potential to activate the prodrug ethionamide. Here, we used medicinal chemistry coupled with a phenotypic assay to select the N-acylated 4-phenylpiperidine compound series. The lead compound, SMARt751, interacted with the transcriptional regulator VirS of M. tuberculosis, which regulates the mymA operon encoding a monooxygenase that activates ethionamide. SMARt751 boosted the efficacy of ethionamide in vitro and in mouse models of acute and chronic TB. SMARt751 also restored full efficacy of ethionamide in mice infected with M. tuberculosis strains carrying mutations in the ethA gene, which cause ethionamide resistance in the clinic. SMARt751 was shown to be safe in tests conducted in vitro and in vivo. A model extrapolating animal pharmacokinetic and pharmacodynamic parameters to humans predicted that as little as 25 mg of SMARt751 daily would allow a fourfold reduction in the dose of ethionamide administered while retaining the same efficacy and reducing side effects.

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