86 research outputs found
New approaches to combating antimicrobial drug resistance
Recent work shows that the inhibition of the SOS stress response in Escherichia coli reduces the development of resistance to the antibiotics ciprofloxacin and rifampicin. This finding may help in the battle against the rise of resistance to antimicrobial drugs
Mutations in Ribosomal Protein RplA or Treatment with Ribosomal Acting Antibiotics Activate Production of Aminoglycoside Efflux Pump SmeYZ in Stenotrophomonas maltophilia
Klebsiella pneumoniae Mutants Resistant to Ceftazidime-Avibactam Plus Aztreonam, Imipenem-Relebactam, Meropenem-Vaborbactam, and Cefepime-Taniborbactam
TonB dependent uptake of β-lactam antibiotics in the opportunistic human pathogen Stenotrophomonas maltophilia
CreC Sensor Kinase Activation Enhances Growth of Escherichia coli in the Presence of Cephalosporins and Carbapenems
Resistance to Ceftazidime/Avibactam Plus Meropenem/Vaborbactam When Both are Used Together Achieved in Four Steps from Metallo-β-Lactamase Negative <i>Klebsiella pneumoniae</i>.
Antimicrobial resistance associations with national primary care antibiotic stewardship policy:Primary care-based, multilevel analytic study
Novel mechanisms of efflux-mediated levofloxacin resistance and reduced amikacin susceptibility in Stenotrophomonas maltophilia
Fluoroquinolone resistance in Stenotrophomonas maltophilia is multifactorial, but the most significant factor is overproduction of efflux pumps, particularly SmeDEF, following mutation. Here, we report that mutations in the glycosyl transferase gene smlt0622 in S. maltophilia K279a mutant K M6 cause constitutive activation of SmeDEF production, leading to elevated levofloxacin MIC. Selection of a levofloxacin-resistant K M6 derivative, K M6 LEV(r), allowed identification of a novel two-component regulatory system, Smlt2645/6 (renamed SmaRS). The sensor kinase Smlt2646 (SmaS) is activated by mutation in K M6 LEV(r) causing overproduction of two novel ABC transporters and the known aminoglycoside efflux pump SmeYZ. Overproduction of one ABC transporter, Smlt1651-4 (renamed SmaCDEF), causes levofloxacin resistance in K M6 LEV(r). Overproduction of the other ABC transporter, Smlt2642/3 (renamed SmaAB), and SmeYZ both contribute to the elevated amikacin MIC against K M6 LEV(r). Accordingly, we have identified two novel ABC transporters associated with antimicrobial drug resistance in S. maltophilia and two novel regulatory systems whose mutation causes resistance to levofloxacin, clinically important as a promising drug for monotherapy against this highly resistant pathogen
Proteomic Investigation of the Signal Transduction Pathways Controlling Colistin Resistance in Klebsiella pneumoniae
Over-Expression of Hypochlorite Inducible Major Facilitator Superfamily (MFS) Pumps Reduces Antimicrobial Drug Susceptibility by Increasing the Production of MexXY Mediated by ArmZ in Pseudomonas aeruginosa
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