1
|
Hong KT, Kang HJ, Choi JY, Hong CR, Cheon JE, Park JD, Park KD, Song SH, Yu KS, Jang IJ, Shin HY. Favorable Outcome of Post-Transplantation Cyclophosphamide Haploidentical Peripheral Blood Stem Cell Transplantation with Targeted Busulfan-Based Myeloablative Conditioning Using Intensive Pharmacokinetic Monitoring in Pediatric Patients. Biol Blood Marrow Transplant 2018; 24:2239-2244. [PMID: 29981849 DOI: 10.1016/j.bbmt.2018.06.034] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 06/28/2018] [Indexed: 01/03/2023]
Abstract
Haploidentical hematopoietic stem cell transplantation (haplo-HSCT) with post-transplantation cyclophosphamide (PTCy) was performed previously in adults using a nonmyeloablative conditioning regimen and bone marrow as a graft source. In an effort to reduce relapse rates, myeloablative conditioning regimens with higher intensities are now used. We used an intensive daily pharmacokinetic monitoring method for busulfan dosing in children for effective myeloablation and to reduce toxicity. Here, we report the retrospective results of 34 patients (median age 11.1 years) who underwent haplo-HSCT with PTCy using a targeted busulfan-based myeloablative conditioning regimen and peripheral blood as a stem cell source. The donor-type neutrophil engraftment rate was 97.1%, and the cumulative incidence rates of grade II to IV and grade III to IV acute and extensive chronic graft-versus-host disease were 38.2%, 5.9%, and 9.1%, respectively. The overall survival and event-free survival rates, and treatment-related mortality were 85.0%, 79.4%, and 2.9%, respectively. Based on the subgroup analysis of patients with malignancies (n = 23), the relapse incidence rate was 21.7%. Haplo-HSCT using PTCy with targeted busulfan-based myeloablative conditioning and peripheral blood as a stem cell source was a safe and promising therapeutic option for children.
Collapse
Affiliation(s)
- Kyung Taek Hong
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Cancer Research Institute, Seoul, Republic of Korea
| | - Hyoung Jin Kang
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Cancer Research Institute, Seoul, Republic of Korea.
| | - Jung Yoon Choi
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Cancer Research Institute, Seoul, Republic of Korea
| | - Che Ry Hong
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Cancer Research Institute, Seoul, Republic of Korea
| | - Jung-Eun Cheon
- Department of Radiology, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - June Dong Park
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyung Duk Park
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Cancer Research Institute, Seoul, Republic of Korea
| | - Sang Hoon Song
- Department of Laboratory Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyung-Sang Yu
- Department of Clinical Pharmacology and Therapeutics Seoul National University College of Medicine and Hospital, Seoul, Republic of Korea
| | - In-Jin Jang
- Department of Clinical Pharmacology and Therapeutics Seoul National University College of Medicine and Hospital, Seoul, Republic of Korea
| | - Hee Young Shin
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea; Seoul National University Cancer Research Institute, Seoul, Republic of Korea
| |
Collapse
|
2
|
Schellekens J, Gagne K, Marsh SGE. Natural killer cells and killer-cell immunoglobulin-like receptor polymorphisms: their role in hematopoietic stem cell transplantation. Methods Mol Biol 2014; 1109:139-58. [PMID: 24473783 DOI: 10.1007/978-1-4614-9437-9_9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Natural killer (NK) cells are important effector cells in the early control of infected, malignant, and "nonself" cells. Various receptor families are involved in enabling NK cells to detect and efficiently eliminate these target cells. The killer-cell immunoglobulin-like receptor (KIR) family is a set of receptors that are very polymorphic with regard to gene content, expression level, and expression pattern. KIRs are responsible for the induction of a NK cell alloreactive response through their interaction with HLA class I molecules. The role of NK cells in hematopoietic stem cell transplantation (HSCT) has been studied for many years, and induction of antileukemic responses by donor NK cells has been reported. Conflicting data still exist on the exact circumstances in which the KIR repertoire affects and influences clinical outcome after HSCT. More large-scale studies are needed on well-defined cohorts to unravel the mechanism of action of the NK cell-mediated alloresponse in an HSCT setting.
Collapse
|