Comparison of aminoglycoside antibiotics with respect to uptake and lethal activity in Escherichia coli.
Forty-five aminoglycoside antibiotics and related compounds were compared for their ability to induce the accumulation of dihydrostreptomycin in Escherichia coli K12. The common aminoglycosides and a streptothricin antibiotic all induced enhanced uptake within a relatively narrow concentration range. These concentrations were lethal to the bacteria. Comparison of aminoacyl derivatives of tobramycin and apramycin, the latter synthesized utilizing transition-metal cations to selectively control the site of substitution, revealed that 1-N-aminoacyl modifications resulted in an increased ability to induce enhanced uptake. 2'-N-Aminoacyl modifications were also effective at inducing enhanced uptake, albeit without noticeable improvement over parent. The findings from this structure-activity comparison support the proposition that aminoglycosides share a common critical target (most likely the ribosome), which, when acted upon, results in both drug accumulation and killing.
D000617:Aminoglycosides / Q000138:chemical synthesis / Q000378:metabolism / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000378:metabolism / Q000494:pharmacology; D001692:Biological Transport; D004926:Escherichia coli / Q000187:drug effects / Q000378:metabolism*; D007202:Indicators and Reagents; D007700:Kinetics; D013329:Structure-Activity Relationship
D000617:Aminoglycosides; D000900:Anti-Bacterial Agents; D007202:Indicators and Reagents