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Vidaeff AC, Asztalos E. Late Preterm Corticosteroids Exposure and Neurodevelopmental Outcomes. JAMA 2024; 331:1626-1627. [PMID: 38656755 DOI: 10.1001/jama.2024.2228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Affiliation(s)
- Alex C Vidaeff
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, Texas
- Texas Children's Hospital, Houston
| | - Elizabeth Asztalos
- Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada
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Du R, Zhao X, Song L, Wang H, Liu D, Wang Q. A physiologically based toxicokinetic model of P-glycoprotein transporter-mediated placenta perfusion of dexamethasone in the pregnant rat. Food Chem Toxicol 2024; 183:114213. [PMID: 38052401 DOI: 10.1016/j.fct.2023.114213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 11/09/2023] [Accepted: 11/19/2023] [Indexed: 12/07/2023]
Abstract
The present dosage of Dexamethasone (DEX) administered to pregnant women may pose a risk of toxicity to their unborn offspring. We aimed to develop a maternal-fetal physiologically based toxicokinetic (PBTK) model for DEX in pregnant rats, with a specific focus on the role of the P-glycoprotein (P-gp) transporter in placenta perfusion, and finally facilitate the optimization of clinical DEX dosage. We conducted animal experiments to determine DEX concentrations in various rat tissues, and constructed the PBTK model using MATLAB software. Sensitivity analysis was performed to assess input parameters and the model stability, with fold error (FE) values serving as evaluation indices. Our results indicate the successful construction of the PBTK model, with the fitting key parameters such as the absorption rate constant (Ka), intrinsic hepatic clearance (CLh,int) and intrinsic P-gp clearance (CLint,P-gp). The median concentration of DEX in maternal plasma, fetal plasma, fetal lung, and fetal brain were determined, which allowed us to fit the tissue-to-plasma partition coefficients for the fetal lung (Kp,lung,f) and fetal brain (Kp,brain,f). After making adjustments, all calculated FE values were found to be less than 2, demonstrating the acceptability and accuracy of our model's predictions. Our model integrated external literature data and internal animal experimentation to comprehensively evaluate the maternal-fetal PK characteristics of DEX. These findings provide valuable support for the optimization of clinical DEX dosing.
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Affiliation(s)
- Ruihu Du
- Department of Toxicology, School of Public Health, Peking University, Beijing, 100191, China
| | - Xiaoqi Zhao
- Department of Pharmacology, Basic Medical School of Wuhan University, Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, 430071, China
| | - Ling Song
- Drug Clinical Trial Center, Peking University Third Hospital, Beijing, 100191, China; Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, China; Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing, 100191, China.
| | - Hui Wang
- Department of Pharmacology, Basic Medical School of Wuhan University, Hubei Provincial Key Laboratory of Developmentally Originated Disease, Wuhan, 430071, China.
| | - Dongyang Liu
- Drug Clinical Trial Center, Peking University Third Hospital, Beijing, 100191, China; Institute of Medical Innovation and Research, Peking University Third Hospital, Beijing, 100191, China; Beijing Key Laboratory of Cardiovascular Receptors Research, Peking University Third Hospital, Beijing, 100191, China.
| | - Qi Wang
- Department of Toxicology, School of Public Health, Peking University, Beijing, 100191, China; Key Laboratory of State Administration of Traditional Chinese Medicine for Compatibility Toxicology, Beijing, 100191, China; Key Laboratory of Toxicological Research and Risk Assessment for Food Safety, Beijing, 100191, China.
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