1
|
Watanabe E, Nishikawa T, Ikawa K, Yamaguchi H, Abematsu T, Nakagawa S, Kurauchi K, Kodama Y, Tanabe T, Shinkoda Y, Matsumoto K, Okamoto Y, Takeda Y, Kawano Y. Trough level monitoring of intravenous busulfan to estimate the area under the plasma drug concentration-time curve in pediatric hematopoietic stem cell transplant recipients. Int J Hematol 2015; 102:611-6. [PMID: 26243625 DOI: 10.1007/s12185-015-1853-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 07/28/2015] [Accepted: 07/28/2015] [Indexed: 12/23/2022]
Abstract
Optimizing systemic busulfan exposure, the area under the concentration-time curve (AUC), improves the outcomes for hematopoietic stem cell transplantation (HSCT). The AUC is conventionally calculated using six plasma concentrations (AUC(0-∞)) drawn after the first of 16 intravenous busulfan doses given as a 2-h infusion every 6 h. The aim of the present study was to develop limited sampling strategies using three or fewer busulfan concentrations to reliably calculate AUC(0-∞) in patients undergoing HSCT. We investigated the pharmacokinetics of busulfan 46 times in 29 pediatric patients receiving intravenous busulfan. Limited sampling strategies using one, two, or three plasma busulfan concentrations were developed by multiple linear regression that showed excellent agreement with AUC(0-∞). In single-point sampling strategies, the AUC(0-∞) predicted based on C(6) (trough level: busulfan plasma concentration 6 h after the start of the infusion) was significantly correlated with, and not statistically different from, actual values as follows: AUC(0-∞) = 2556.5 C6 + 320.9 (r(2) = 0.929, P < 0.0001, mean bias 0.282 %, precision 7.91 %). In contrast, the predicted AUCs derived from the other sampling single points did not meet the criteria. The trough level well correlated with actual AUC(0-∞), suggesting that this time-point is acceptable for busulfan monitoring.
Collapse
Affiliation(s)
- Erika Watanabe
- Department of Clinical Pharmacy and Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Takuro Nishikawa
- Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan.
| | - Kazuro Ikawa
- Department of Clinical Pharmacotherapy, Hiroshima University, Hiroshima, Japan
| | | | - Takanari Abematsu
- Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Shunsuke Nakagawa
- Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Koichiro Kurauchi
- Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Yuichi Kodama
- Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Takayuki Tanabe
- Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Yuichi Shinkoda
- Department of Pediatrics, Kagoshima City Hospital, Kagoshima, Japan
| | - Kazuaki Matsumoto
- Department of Clinical Pharmacy and Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yasuhiro Okamoto
- Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| | - Yasuo Takeda
- Department of Clinical Pharmacy and Pharmacology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan
| | - Yoshifumi Kawano
- Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima, 890-8520, Japan
| |
Collapse
|