Title : β-Lactams increase the antibacterial activity of daptomycin against clinical methicillin-resistant Staphylococcus aureus strains and prevent selection of daptomycin-resistant derivatives.

Pub. Date : 2012 Dec

PMID : 22985884






6 Functional Relationships(s)
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1 Our study provides evidence that the seesaw effect applies to other beta-lactams and carbapenems of clinical use, including nafcillin (NAF), cefotaxime (CTX), amoxicillin-clavulanic (AMC), and imipenem (IMP), in heterogeneous DAP(r) MRSA strains but not in MRSA strains expressing homogeneous beta-lactam resistance. beta-Lactams death associated protein Homo sapiens
2 Our study provides evidence that the seesaw effect applies to other beta-lactams and carbapenems of clinical use, including nafcillin (NAF), cefotaxime (CTX), amoxicillin-clavulanic (AMC), and imipenem (IMP), in heterogeneous DAP(r) MRSA strains but not in MRSA strains expressing homogeneous beta-lactam resistance. beta-Lactams death associated protein Homo sapiens
3 In these models, DAP and a beta-lactam proved to be highly synergistic against both heterogeneous and homogeneous clinical DAP(r) MRSA strains. beta-Lactams death associated protein Homo sapiens
4 Mechanistically, beta-lactams induced a reduction in the cell net positive surface charge, reverting the increased repulsion provoked by DAP alone, an effect that may favor the binding of DAP to the cell surface. beta-Lactams death associated protein Homo sapiens
5 Mechanistically, beta-lactams induced a reduction in the cell net positive surface charge, reverting the increased repulsion provoked by DAP alone, an effect that may favor the binding of DAP to the cell surface. beta-Lactams death associated protein Homo sapiens
6 Importantly, the combination of DAP and a beta-lactam prevented the selection of DAP(r) variants. beta-Lactams death associated protein Homo sapiens