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Animal Models

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Division of Comparative Medicine

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Physiologically Based Pharmacokinetic Model Validated to Enable Predictions of Multiple Drugs in a Long-Acting Drug-Combination Nano-Particles (DcNP): Confirmation With 3 HIV Drugs, Lopinavir, Ritonavir, and Tenofovir in DcNP Products

Perazzolo et al., Journal of Pharmaceutical Sciences. 2024.

https://jpharmsci.org/article/S0022-3549(24)00060-1/fulltext

Drug-combination nanoparticles synchronize delivery of multiple drugs in a single, long-acting, targeted dose. Two distinct classes of long-acting injectable products are proposed based on pharmacokinetic mechanisms. Class I involves sustained release at the injection site, and Class II involves a drug-carrier complex composed of lopinavir, ritonavir, and tenofovir uptake and retention in the lymphatic system before systemic access. This review used data from three nonhuman primate studies, consisting of nine pharmacokinetic data sets, to support clinical development of Class II products. Eight of nine models passed validation, and the drug–drug interaction identified in the ninth model can be accounted for in the final model. Supported by ORIP (P51OD010425, U42OD011123), NIAID, and NHLBI.

Surgical Protocol for Partial Heart Transplantation in Growing Piglets

Medina, World Journal for Pediatric and Congenital Heart Surgery. 2024.

https://pubmed.ncbi.nlm.nih.gov/38780414/

Researchers are interested in using partial heart transplantation (i.e., only the part of the heart containing the necessary heart valve is transplanted) to deliver growing heart valve implants. This novel technique allows partial heart transplants to grow, similar to the valves in heart transplants. More work is needed, however, to understand the underlying biological mechanisms of this approach and achieve progress in clinical care. In the present study, the authors present a surgical protocol for partial heart transplantation in growing piglets. This model will enable other researchers to seek fundamental knowledge about the nature of partial heart transplants. Supported by ORIP (U42OD011140) and NHLBI.