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Development of 1,2,4-Oxadiazole Antimicrobial Agents to Treat Enteric Pathogens within the Gastrointestinal Tract

Pitcher, N.P., Harjani, J.R., Zhao, Y., Jin, J., Knight, D.R.ORCID: 0000-0002-9480-4733, Li, L., Putsathit, P., Riley, T.V., Carter, G.P. and Baell, J.B. (2022) Development of 1,2,4-Oxadiazole Antimicrobial Agents to Treat Enteric Pathogens within the Gastrointestinal Tract. ACS Omega, 7 (8). pp. 6737-6759.

Link to Published Version: https://doi.org/10.1021/acsomega.1c06294
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Abstract

Colonization of the gastrointestinal (GI) tract with pathogenic bacteria is an important risk factor for the development of certain potentially severe and life-threatening healthcare-associated infections, yet efforts to develop effective decolonization agents have been largely unsuccessful thus far. Herein, we report modification of the 1,2,4-oxadiazole class of antimicrobial compounds with poorly permeable functional groups in order to target bacterial pathogens within the GI tract. We have identified that the quaternary ammonium functionality of analogue 26a results in complete impermeability in Caco-2 cell monolayers while retaining activity against GI pathogens Clostridioides difficile and multidrug-resistant (MDR) Enterococcus faecium. Low compound recovery levels after oral administration in rats were observed, which suggests that the analogues may be susceptible to degradation or metabolism within the gut, highlighting a key area for optimization in future efforts. This study demonstrates that modified analogues of the 1,2,4-oxadiazole class may be potential leads for further development of colon-targeted antimicrobial agents.

Item Type: Journal Article
Murdoch Affiliation(s): Medical, Molecular and Forensic Sciences
Publisher: American Chemical Society
Copyright: © 2022 The Authors.
URI: http://researchrepository.murdoch.edu.au/id/eprint/64121
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