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Bayesian Coalescent Modeling of the Evolutionary Response ofHIV to TherapyAlexander F. BraunsteinDepartment of Statistics, The Wharton School,University of PennsylvaniaShane T. Jensen ∗Department of Statistics, The Wharton School,University of PennsylvaniaJon McAuliffeDepartment of Statistics, The Wharton School,University of PennsylvaniaStatistical evolutionary models provide an important mechanism for describing and understandingthe escape response of a viral population under a particular therapy. We present a coalescent-basedmodel that incorporates spatially varying mutation and recombination rates at the nucleotide level. Ourhierarchical structure also maintains separate parameters for treatment and control groups, which allowsus to estimate treatment effects explicitly. We use the model to investigate the sequence evolution of HIVpopulations exposed to a recently developed antisense gene therapy, as well as a more conventional drugtherapy. The detection of biologically relevant and plausible signals in both therapy studies demonstratesthe effectiveness of the method.∗ Apresentador/Speaker28

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