{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,18]],"date-time":"2026-10-18T06:54:29Z","timestamp":1792306469471,"version":"4.4.0"},"reference-count":378,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2023,8,9]],"date-time":"2023-08-09T00:00:00Z","timestamp":1691539200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Antibiotics"],"abstract":"<jats:p>Pseudomonas aeruginosa (P. aeruginosa) poses a grave clinical challenge due to its multidrug resistance (MDR) phenotype, leading to severe and life-threatening infections. This bacterium exhibits both intrinsic resistance to various antipseudomonal agents and acquired resistance against nearly all available antibiotics, contributing to its MDR phenotype. Multiple mechanisms, including enzyme production, loss of outer membrane proteins, target mutations, and multidrug efflux systems, contribute to its antimicrobial resistance. The clinical importance of addressing MDR in P. aeruginosa is paramount, and one pivotal determinant is the resistance-nodulation-division (RND) family of drug\/proton antiporters, notably the Mex efflux pumps. These pumps function as crucial defenders, reinforcing the emergence of extensively drug-resistant (XDR) and pandrug-resistant (PDR) strains, which underscores the urgency of the situation. Overcoming this challenge necessitates the exploration and development of potent efflux pump inhibitors (EPIs) to restore the efficacy of existing antipseudomonal drugs. By effectively countering or bypassing efflux activities, EPIs hold tremendous potential for restoring the antibacterial activity against P. aeruginosa and other Gram-negative pathogens. This review focuses on concurrent MDR, highlighting the clinical significance of efflux pumps, particularly the Mex efflux pumps, in driving MDR. It explores promising EPIs and delves into the structural characteristics of the MexB subunit and its substrate binding sites.<\/jats:p>","DOI":"10.3390\/antibiotics12081304","type":"journal-article","created":{"date-parts":[[2023,8,9]],"date-time":"2023-08-09T10:08:59Z","timestamp":1691575739000},"page":"1304","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":95,"title":["The Art of War with Pseudomonas aeruginosa: Targeting Mex Efflux Pumps Directly to Strategically Enhance Antipseudomonal Drug Efficacy"],"prefix":"10.3390","volume":"12","author":[{"given":"Asiyeh","family":"Avakh","sequence":"first","affiliation":[{"name":"School of Pharmacy and Medical Sciences, Griffith University, Gold Coast, QLD 4222, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2574-5442","authenticated-orcid":false,"given":"Gary D.","family":"Grant","sequence":"additional","affiliation":[{"name":"School of Pharmacy and Medical Sciences, Griffith University, Gold Coast, QLD 4222, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matthew J.","family":"Cheesman","sequence":"additional","affiliation":[{"name":"School of Pharmacy and Medical Sciences, Griffith University, Gold Coast, QLD 4222, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5021-1987","authenticated-orcid":false,"given":"Tejaswini","family":"Kalkundri","sequence":"additional","affiliation":[{"name":"School of Pharmacy and Medical Sciences, Griffith University, Gold Coast, QLD 4222, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8564-0466","authenticated-orcid":false,"given":"Susan","family":"Hall","sequence":"additional","affiliation":[{"name":"School of Pharmacy and Medical Sciences, Griffith University, Gold Coast, QLD 4222, Australia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,8,9]]},"reference":[{"key":"ref_1","first-page":"1","article-title":"Pseudomonas aeruginosa: Pathogenesis, virulence factors, antibiotic resistance, interaction with host, technology advances and emerging therapeutics","volume":"7","author":"Qin","year":"2022","journal-title":"Signal Transduct. 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