Abstract:
:Increasing antimicrobial drug resistance is a global threat especially with respect to Gram-negative bacteria. The low permeability of the bacterial outer cell wall has been identified as an important bottleneck that prevents a sufficient antibacterial effect to be achieved at low doses of the antibiotics. In particular, the outer membrane permeability for negatively charged molecules of the clinical important ESKAPE bacterium Pseudomonas aeruginosa is determined by the low conductance porins OprO and OprP Here we show that the alternative phosphonic-acid antibiotic fosfomycin is highly permeable through the OprO and OprP channels. For this, we applied an electrophysiological zero-current assay using concentration gradients of fosfomycin under tri-ionic conditions to quantify flux of fosfomycin through OprO and OprP. Our analyzes show that OprO, and to a lesser degree OprP, have unexpected very high permeability to fosfomycin, so the antibiotic should be a potentially excellent alternative choice for the control of Pseudomonas aeruginosa infections.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Citak F,Ghai I,Rosenkötter F,Benier L,Winterhalter M,Wagner Rdoi
10.1016/j.bbrc.2017.11.188subject
Has Abstractpub_date
2018-01-01 00:00:00pages
1454-1460issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(17)32365-3journal_volume
495pub_type
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