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<p>The rapid emergence of antimicrobial resistance in <i>S. aureus</i>, particularly MRSA, poses a serious global health risk. Among the various mechanisms used by <i>S. aureus</i> to resist antimicrobial pressure, efflux pumps have emerged as essential contributors to multidrug resistance. These cell membrane-associated transport systems actively efflux antibiotics, biocides, and toxic substances, thereby lowering intracellular drug levels and enabling chronic infection. This review provides a comprehensive overview of the classification, organization, substrate specificity, and regulatory pathways of the primary efflux pump families in <i>S. aureus.</i> We also discuss the molecular mechanisms underlying efflux-mediated resistance, focusing on the critical regulatory proteins involved in efflux pump regulation. This review explores the latest developments in strategies of efflux pump inhibition, such as antibiotic restructuring, energy disruption, genetic interference, and direct binding to pumps. The synergistic interaction between efflux pump inhibitors&#xa0;and conventional antibiotics is especially notable as a feasible strategy for restoring antibiotic&#xa0;efficacy and combating resistance. Collectively, this review highlights the potential of blocking efflux systems as a novel and urgently needed therapeutic strategy against multidrug-resistant <i>S. aureus</i>.</p>

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Efflux-Mediated Resistance in Staphylococcus aureus: Challenges and Opportunities for Therapeutic Intervention

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Suvendu Ojha,
  • Tushar Kant Beuria

摘要

The rapid emergence of antimicrobial resistance in S. aureus, particularly MRSA, poses a serious global health risk. Among the various mechanisms used by S. aureus to resist antimicrobial pressure, efflux pumps have emerged as essential contributors to multidrug resistance. These cell membrane-associated transport systems actively efflux antibiotics, biocides, and toxic substances, thereby lowering intracellular drug levels and enabling chronic infection. This review provides a comprehensive overview of the classification, organization, substrate specificity, and regulatory pathways of the primary efflux pump families in S. aureus. We also discuss the molecular mechanisms underlying efflux-mediated resistance, focusing on the critical regulatory proteins involved in efflux pump regulation. This review explores the latest developments in strategies of efflux pump inhibition, such as antibiotic restructuring, energy disruption, genetic interference, and direct binding to pumps. The synergistic interaction between efflux pump inhibitors and conventional antibiotics is especially notable as a feasible strategy for restoring antibiotic efficacy and combating resistance. Collectively, this review highlights the potential of blocking efflux systems as a novel and urgently needed therapeutic strategy against multidrug-resistant S. aureus.