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• W2968467907 abstract "Bacterial heteroresistance (i.e., the co-existence of several subpopulations with different antibiotic susceptibilities) can delay the clearance of bacteria even with long antibiotic exposure. Some proposed mechanisms have been successfully described with mathematical models of drug-target binding where the mechanism's downstream of drug-target binding are not explicitly modeled and subsumed in an empirical function, connecting target occupancy to antibiotic action. However, with current approaches it is difficult to model mechanisms that involve multi-step reactions that lead to bacterial killing. Here, we have a dual aim: first, to establish pharmacodynamic models that include multi-step reaction pathways, and second, to model heteroresistance and investigate which molecular heterogeneities can lead to delayed bacterial killing. We show that simulations based on Gillespie algorithms, which have been employed to model reaction kinetics for decades, can be useful tools to model antibiotic action via multi-step reactions. We highlight the strengths and weaknesses of current models and Gillespie simulations. Finally, we show that in our models, slight normally distributed variances in the rates of any event leading to bacterial death can (depending on parameter choices) lead to delayed bacterial killing (i.e., heteroresistance). This means that a slowly declining residual bacterial population due to heteroresistance is most likely the default scenario and should be taken into account when planning treatment length." @default.
• W2968467907 created "2019-08-22" @default.
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• W2968467907 date "2019-08-15" @default.
• W2968467907 modified "2023-09-26" @default.
• W2968467907 title "Reaction Kinetic Models of Antibiotic Heteroresistance" @default.
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• W2968467907 doi "https://doi.org/10.3390/ijms20163965" @default.
• W2968467907 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6719119" @default.
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• W2968467907 hasPublicationYear "2019" @default.
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