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Ben Hassine K, Seydoux C, Khier S, Daali Y, Medinger M, Halter J, Heim D, Chalandon Y, Schanz U, Nair G, Cantoni N, Passweg JR, Satyanarayana Uppugunduri CR, Ansari M. Pharmacokinetic Modeling and Simulation with Pharmacogenetic Insights Support the Relevance of Therapeutic Drug Monitoring for Myeloablative Busulfan Dosing in Adult HSCT. Transplant Cell Ther 2024; 30:332.e1-332.e15. [PMID: 38081414 DOI: 10.1016/j.jtct.2023.12.003] [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: 09/17/2023] [Revised: 11/08/2023] [Accepted: 12/04/2023] [Indexed: 01/01/2024]
Abstract
Therapeutic drug monitoring (TDM) of busulfan (Bu) is well-established in pediatric hematopoietic stem cell transplantation (HSCT), but its use in adults is limited due to a lack of clear recommendations and scarcity of evidence regarding its utility. GSTA1 promoter variants are reported to affect Bu clearance in both adults and pediatric patients. This study aimed to evaluate the value of preemptive genotyping GSTA1 and body composition (obesity) in individualizing Bu dosing in adults, through pharmacokinetic (PK) modeling and simulations. A population pharmacokinetic (PopPK) model was developed and validated with data from 60 adults who underwent HSCT. Simulations assessed different dosing scenarios based on body size metrics and GSTA1 genotypes. Due to the limited number of obese patients in the cohort, the effect of obesity on Bu pharmacokinetics (PK) was evaluated in silico using a physiologically-based pharmacokinetic (PBPK) model and relevant virtual populations from Simcyp software. Patients with at least 1 GSTA1*B haplotype had 17% lower clearance on average. PopPK simulations indicated that adjusting doses based on genotype increased the probability of achieving the target exposure (3.7 to 5.5 mg.h/L) from 53% to 60 % in GSTA1*A homozygous patients, and from 50% to 61% in *B carriers. Still, Approximately 40% of patients would not achieve this therapeutic window without TDM. A 2-sample optimal design was validated for routine model-based Bu first dose AUC0-∞ estimation, and the model was implemented in the Tucuxi user-friendly TDM software. PBPK simulations confirmed body surface area-based doses of 29 to 31 mg/m2/6h as the most appropriate, regardless of obesity status. This study emphasizes the importance of individualized Bu dosing strategies in adults to achieve therapeutic targets. Preemptive genotyping alone may not have a significant clinical impact, and routine TDM may be necessary for optimal transplantation outcomes.
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Affiliation(s)
- Khalil Ben Hassine
- Department of Pediatrics, Gynecology and Obstetrics, Cansearch Research Platform for Pediatric Oncology and Hematology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Claire Seydoux
- Division of Hematology, University Hospital of Basel, Basel, Switzerland
| | - Sonia Khier
- Pharmacokinetic and Modeling Department, School of Pharmacy, Montpellier University, Montpellier, France; Probabilities and Statistics Department, Institut Montpelliérain Alexander Grothendieck (IMAG), CNRS, UMR 5149, Inria, Montpellier University, Montpellier, France
| | - Youssef Daali
- Division of Clinical Pharmacology and Toxicology, University Hospital of Geneva, Geneva, Switzerland; Faculty of Medicine & Sciences, University of Geneva, Geneva, Switzerland
| | - Michael Medinger
- Division of Hematology, University Hospital of Basel, Basel, Switzerland and University Basel, Basel, Switzerland
| | - Joerg Halter
- Division of Hematology, University Hospital of Basel, Basel, Switzerland and University Basel, Basel, Switzerland
| | - Dominik Heim
- Division of Hematology, University Hospital of Basel, Basel, Switzerland and University Basel, Basel, Switzerland
| | - Yves Chalandon
- Division of Hematology, Bone Marrow Transplant Unit, University Hospital of Geneva and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Urs Schanz
- Department of Medical Oncology and Hematology, University Hospital of Zurich, Zurich, Switzerland
| | - Gayathri Nair
- Department of Medical Oncology and Hematology, University Hospital of Zurich, Zurich, Switzerland
| | - Nathan Cantoni
- Division of Oncology, Hematology and Transfusion Medicine, Kantonsspital Aarau, Aarau, Switzerland
| | - Jakob R Passweg
- Division of Hematology, University Hospital of Basel, Basel, Switzerland and University Basel, Basel, Switzerland
| | - Chakradhara Rao Satyanarayana Uppugunduri
- Department of Pediatrics, Gynecology and Obstetrics, Cansearch Research Platform for Pediatric Oncology and Hematology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Marc Ansari
- Department of Pediatrics, Gynecology and Obstetrics, Cansearch Research Platform for Pediatric Oncology and Hematology, Faculty of Medicine, University of Geneva, Geneva, Switzerland; Division of Pediatric Oncology and Hematology, Department of Women, Child and Adolescent, University Geneva Hospitals, Geneva, Switzerland.
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Combarel D, Tran J, Delahousse J, Vassal G, Paci A. Individualizing busulfan dose in specific populations and evaluating the risk of pharmacokinetic drug-drug interactions. Expert Opin Drug Metab Toxicol 2023; 19:75-90. [PMID: 36939456 DOI: 10.1080/17425255.2023.2192924] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
INTRODUCTION Busulfan is an alkylating agent widely used in the conditioning of hematopoietic stem cell transplantation possessing a complex metabolism and a large interindividual and intra-individual variability, especially in children. Combined with the strong rationale of busulfan PK/PD relationships, factors altering its clearance (e.g., weight, age, and GST-A genetic polymorphism mainly) can also affect clinical outcomes. AREAS COVERED This review aims to provide an overview of the current knowledge on busulfan pharmacokinetics, its pharmacokinetics variabilities in pediatric populations, drug-drug interactions (DDI), and their consequences regarding dose individualization. This review was based on medical literature up until October 2021. EXPERT OPINION To ensure effective busulfan exposure in pediatrics, different weight-based nomograms have been established to determine busulfan dosage and provided improved results (65 - 80% of patients correctly exposed). In addition to nomograms, therapeutic drug monitoring (TDM) of busulfan measuring plasmatic concentrations to estimate busulfan pharmacokinetic parameters can be used. TDM is now widely carried out in routine practices and aims to ensure the targeting of the reported therapeutic windows by individualizing busulfan dosing based on the clearance estimations from a previous dose.
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Affiliation(s)
- David Combarel
- Service de Pharmacologie, Département de biologie et pathologie médicale, Gustave Roussy, Université Paris-Saclay, Villejuif, France.,Université Paris-Saclay, Faculté de Pharmacie, Université Paris-Saclay, Chatenay-Malabry, France
| | - Julie Tran
- Service de Pharmacologie, Département de biologie et pathologie médicale, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Julia Delahousse
- Service de Pharmacologie, Département de biologie et pathologie médicale, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Gilles Vassal
- Gustave Roussy Comprehensive Cancer Center, & University Paris-Saclay, Villejuif, France
| | - Angelo Paci
- Service de Pharmacologie, Département de biologie et pathologie médicale, Gustave Roussy, Université Paris-Saclay, Villejuif, France.,Université Paris-Saclay, Faculté de Pharmacie, Université Paris-Saclay, Chatenay-Malabry, France
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Okada Y, Nakasone H, Konuma T, Uchida N, Tanaka M, Sugio Y, Aotsuka N, Nishijima A, Katsuoka Y, Ara T, Ota S, Onizuka M, Sawa M, Kimura T, Fukuda T, Atsuta Y, Kanda J, Kimura F. Ideal body weight is useful for predicting neutrophil engraftment and platelet recovery for overweight and obese recipients in single-unit cord blood transplantation. Transplant Cell Ther 2022; 28:504.e1-504.e7. [PMID: 35577325 DOI: 10.1016/j.jtct.2022.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/19/2022] [Accepted: 05/07/2022] [Indexed: 11/27/2022]
Abstract
BACKGROUND Since cord blood (CB) units are usually selected based on the cell dose /kg, overweight (25 kg/m2 ≤ body mass index (BMI) < 30 kg/m2) and obese (30 kg/m2 ≤ BMI) recipients tend to have difficulty in getting appropriate CB units. In general, actual body weight (ABW) is used for CB unit selection. However, ideal body weight (IBW) has been reported to be more closely correlated with successful engraftment after autologous, allogeneic bone marrow, and peripheral blood stem cell transplantation than ABW. OBJECTIVES We conducted this analysis to clarify the threshold of CD34+ cell doses based on ideal body weight (CD34IBW) and to compare the outcomes among the groups stratified by the threshold according to actual body weight (CD34ABW) and CD34IBW for overweight and obese recipients in cord blood transplantation (CBT). STUDY DESIGN We retrospectively analyzed 650 overweight and obese recipients who received single-unit CBT. To focus on the recipients who received a low CD34+ cell dose /kg, those who received 1.5×105 CD34+ cells /ABW or more were excluded. Using a cut-off of 0.8×105 CD34+ cells/kg, we compared the outcomes in 3 groups with low CD34ABW and low CD34IBW (CD34Low/Low), low CD34ABW but high CD34IBW (CD34Low/High), and high CD34ABW and high CD34IBW (CD34High/High). RESULTS Hematopoietic recoveries were significantly delayed in the CD34Low/Low group compared with those in the CD34Low/High group (hazard ratio (HR) 0.67 for neutrophil, P < 0.001; HR 0.72 for platelet, P = 0.014), while those were comparable in the CD34Low/High and CD34High/High groups (HR 1.22 for neutrophil, P = 0.16; HR 1.29 for platelet, P = 0.088). Moreover, the CD34Low/High group demonstrated longer overall survival than the CD34Low/Low group (HR 1.48, P = 0.011) and comparable survival to the CD34High/High group (HR 0.93, P = 0.68). CONCLUSIONS This finding may address the lack of availability of CB units for some overweight and obese recipients for whom suitable donors are unavailable. Further investigations are warranted to evaluate the appropriateness of ABW and IBW.
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Affiliation(s)
- Yosuke Okada
- Department of Hematology, National Defense Medical College Hospital, Saitama, Japan; Department of Hematology, Jichi Medical University Saitama Medical Center, Saitama, Japan.
| | - Hideki Nakasone
- Department of Hematology, Jichi Medical University Saitama Medical Center, Saitama, Japan
| | - Takaaki Konuma
- Department of Hematology/Oncology, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Naoyuki Uchida
- Department of Hematology, Federation of National Public Service Personnel Mutual Aid Associations TORANOMON HOSPITAL, Tokyo, Japan
| | - Masatsugu Tanaka
- Department of Hematology, Kanagawa Cancer Center, Kanagawa, Japan
| | - Yasuhiro Sugio
- Department of Hematology, Kitakyushu City Hospital Organization, Kitakyushu Municipal Medical Center, Fukuoka, Japan
| | - Nobuyuki Aotsuka
- Division of Hematology-Oncology, Japanese Red Cross Society Narita Hospital, Chiba, Japan
| | - Akihiko Nishijima
- Hematology Division, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo, Japan
| | - Yuna Katsuoka
- Department of Hematology, National Hospital Organization Sendai Medical Center, Miyagi, Japan
| | - Takahide Ara
- Department of Hematology, Hokkaido University Hospital, Hokkaido, Japan
| | - Shuichi Ota
- Department of Hematology, Sapporo Hokuyu Hospital, Hokkaido, Japan
| | - Makoto Onizuka
- Department of Hematology/Oncology, Tokai University School of Medicine, Kanagawa, Japan
| | - Masashi Sawa
- Department of Hematology and Oncology, Anjo Kosei Hospital, Aichi, Japan
| | - Takafumi Kimura
- Preparation Department, Japanese Red Cross Kinki Block Blood Center, Osaka, Japan
| | - Takahiro Fukuda
- Hematopoietic Stem Cell Transplantation Division, National Cancer Center Hospital, Tokyo, Japan
| | - Yoshiko Atsuta
- Japanese Data Center for Hematopoietic Cell Transplantation; Department of Registry Science for Transplant and Cellular Therapy, Aichi Medical University School of Medicine, Aichi, Japan
| | - Junya Kanda
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Fumihiko Kimura
- Department of Hematology, National Defense Medical College Hospital, Saitama, Japan
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