Identification of Staphylococcus aureus Cellular Pathways Affected by the Stilbenoid Lead Drug SK-03-92 Using a Microarray
AbstractThe mechanism of action for a new lead stilbene compound coded SK-03-92 with bactericidal activity against methicillin-resistant Staphylococcus aureus (MRSA) is unknown. To gain insight into the killing process, transcriptional profiling was performed on SK-03-92 treated vs. untreated S. aureus. Fourteen genes were upregulated and 38 genes downregulated by SK-03-92 treatment. Genes involved in sortase A production, protein metabolism, and transcriptional regulation were upregulated, whereas genes encoding transporters, purine synthesis proteins, and a putative two-component system (SACOL2360 (MW2284) and SACOL2361 (MW2285)) were downregulated by SK-03-92 treatment. Quantitative real-time polymerase chain reaction analyses validated upregulation of srtA and tdk as well as downregulation of the MW2284/MW2285 and purine biosynthesis genes in the drug-treated population. A quantitative real-time polymerase chain reaction analysis of MW2284 and MW2285 mutants compared to wild-type cells demonstrated that the srtA gene was upregulated by both putative two-component regulatory gene mutants compared to the wild-type strain. Using a transcription profiling technique, we have identified several cellular pathways regulated by SK-03-92 treatment, including a putative two-component system that may regulate srtA and other genes that could be tied to the SK-03-92 mechanism of action, biofilm formation, and drug persisters. View Full-Text
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Schwan, W.R.; Polanowski, R.; Dunman, P.M.; Medina-Bielski, S.; Lane, M.; Rott, M.; Lipker, L.; Wescott, A.; Monte, A.; Cook, J.M.; Baumann, D.D.; Tiruveedhula, V.P.B.; Witzigmann, C.M.; Mikel, C.; Rahman, M.T. Identification of Staphylococcus aureus Cellular Pathways Affected by the Stilbenoid Lead Drug SK-03-92 Using a Microarray. Antibiotics 2017, 6, 17.
Schwan WR, Polanowski R, Dunman PM, Medina-Bielski S, Lane M, Rott M, Lipker L, Wescott A, Monte A, Cook JM, Baumann DD, Tiruveedhula VPB, Witzigmann CM, Mikel C, Rahman MT. Identification of Staphylococcus aureus Cellular Pathways Affected by the Stilbenoid Lead Drug SK-03-92 Using a Microarray. Antibiotics. 2017; 6(3):17.Chicago/Turabian Style
Schwan, William R.; Polanowski, Rebecca; Dunman, Paul M.; Medina-Bielski, Sara; Lane, Michelle; Rott, Marc; Lipker, Lauren; Wescott, Amy; Monte, Aaron; Cook, James M.; Baumann, Douglas D.; Tiruveedhula, V.V.N. P.B.; Witzigmann, Christopher M.; Mikel, Cassandra; Rahman, Md T. 2017. "Identification of Staphylococcus aureus Cellular Pathways Affected by the Stilbenoid Lead Drug SK-03-92 Using a Microarray." Antibiotics 6, no. 3: 17.