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- W2189654073 abstract "Noxafil® (posaconazole; POS) is a potent, selective triazole antifungal approved for use in adults as an oral suspension, oral tablet and intravenous (IV) Solution. In support of pediatric administration of POS IV Solution to children<two years of age, a nonclinical study in juvenile pre-weaning Beagle dogs was conducted, which showed enlarged lateral ventricles in the brain at the conclusion of a 6 week dosing period.To evaluate the impact of this finding on older age dogs, which would support administration to children>two years of age, two studies were undertaken using magnetic resonance imaging (MRI) to monitor brain ventricle size longitudinally during three months administration of POS IV in adult and juvenile dogs. Necropsy was performed on all animals at the end of the studies. From the baseline MRI images, great variability in ventricle size was noted in both the adult and juvenile dogs; these images were used to distribute differently sized ventricles between treatment and vehicle groups as to not skew group means during the course of the study.POS IV Solution had no effect on ventricle volume at any timepoint during dosing in either the adult or the juvenile dogs. Further, no gross or histomorphologic differences between groups were observed in either study. Compared to juvenile dogs, MRI analysis showed that adult dogs had larger ventricles, lower variability in all ventricle volumes, and a greater rate of increase in total ventricle volume.Information on growth and development of brains is one of the few areas in which more detailed information is available about humans than about the standard laboratory animals used to model disease and predict toxicities. The use of MRI helped elucidate large natural variabilities in the dog brain, which could have altered the interpretation of this de-risking study, and provided a valuable noninvasive means to monitor the brain ventricles longitudinally." @default.
- W2189654073 created "2016-06-24" @default.
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- W2189654073 date "2015-11-01" @default.
- W2189654073 modified "2023-09-27" @default.
- W2189654073 title "Magnetic resonance imaging assessment of the ventricular system in the brains of adult and juvenile beagle dogs treated with posaconazole IV Solution" @default.
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- W2189654073 doi "https://doi.org/10.1016/j.vascn.2015.07.011" @default.
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