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[MDR efflux pumps and antimicrobial resistance]
1Departamento de Biotecnología Microbiana, Centro Nacional de Biotecnologia (CSIC), Campus Universidad Autonoma de Madrid, Cantoblanco, Madrid, Spain.
Summary
Multi-Drug Resistance (MDR) efflux pumps in bacteria contribute to both intrinsic and acquired antibiotic resistance. This review details their features and regulatory mechanisms, crucial for understanding bacterial drug evasion.
Area of Science:
- Microbiology
- Molecular Biology
- Biochemistry
Context:
- Multi-Drug Resistance (MDR) systems, initially identified in eukaryotes, are increasingly recognized in bacteria.
- These bacterial MDR efflux pumps expel diverse substrates, contributing to antibiotic resistance.
Purpose:
- To review the key characteristics of bacterial MDR systems.
- To elucidate the regulatory mechanisms governing the expression of these efflux pumps.
Summary:
- MDR efflux pumps are transporters that confer resistance by expelling multiple drugs.
- Basal expression in wild-type bacteria suggests a role in intrinsic resistance.
- Overexpression, due to induction or mutations, drives acquired antibiotic resistance.
Impact:
- Understanding MDR systems is vital for developing strategies to combat antibiotic resistance.
- This review provides insights into bacterial defense mechanisms against antibiotics.
- Knowledge of MDR regulation can inform novel therapeutic approaches.