التفاصيل البيبلوغرافية
| العنوان: |
Steroid Drugs Inhibit Bacterial Respiratory Oxidases and Are Lethal Toward Methicillin-Resistant Staphylococcus aureus. |
| المؤلفون: |
Henry, Samantha A, Webster, Calum M, Shaw, Lindsey N, Torres, Nathanial J, Jobson, Mary-Elizabeth, Totzke, Brendan C, Jackson, Jessica K, McGreig, Jake E, Wass, Mark N, Robinson, Gary K, Shepherd, Mark |
| المصدر: |
Journal of Infectious Diseases; 7/15/2024, Vol. 230 Issue 1, pe149-e158, 10p |
| مصطلحات موضوعية: |
ESCHERICHIA coli, METHICILLIN-resistant staphylococcus aureus, MOLECULAR docking, OXYGEN electrodes, STEROID drugs |
| مستخلص: |
Background Cytochrome bd complexes are respiratory oxidases found exclusively in prokaryotes that are important during infection for numerous bacterial pathogens. Methods In silico docking was employed to screen approved drugs for their ability to bind to the quinol site of Escherichia coli cytochrome bd -I. Respiratory inhibition was assessed with oxygen electrodes using membranes isolated from E. coli and methicillin-resistant Staphylococcus aureus strains expressing single respiratory oxidases (ie, cytochromes bd , bo ′, or aa 3). Growth/viability assays were used to measure bacteriostatic and bactericidal effects. Results The steroid drugs ethinylestradiol and quinestrol inhibited E. coli bd -I activity with median inhibitory concentration (IC50) values of 47 ± 28.9 µg/mL (158 ± 97.2 µM) and 0.2 ± 0.04 µg/mL (0.5 ± 0.1 µM), respectively. Quinestrol inhibited growth of an E. coli " bd -I only" strain with an IC50 of 0.06 ± 0.02 µg/mL (0.2 ± 0.07 µM). Growth of an S. aureus " bd only" strain was inhibited by quinestrol with an IC50 of 2.2 ± 0.43 µg/mL (6.0 ± 1.2 µM). Quinestrol exhibited potent bactericidal effects against S. aureus but not E. coli. Conclusions Quinestrol inhibits cytochrome bd in E. coli and S. aureus membranes and inhibits the growth of both species, yet is only bactericidal toward S. aureus. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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