Volume 21, Issue 7 e13043
ORIGINAL ARTICLE

T cell replete–haploidentical second hematopoietic stem cell transplantation for primary graft failure in pediatric patients with hematologic malignancies

Kazuhiro Mochizuki

Kazuhiro Mochizuki

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

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Hideki Sano

Hideki Sano

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

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Mitsuko Akaihata

Mitsuko Akaihata

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

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Shogo Kobayashi

Shogo Kobayashi

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

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Tomoko Waragai

Tomoko Waragai

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

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Yoshihiro Ohara

Yoshihiro Ohara

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

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Nobuhisa Takahashi

Nobuhisa Takahashi

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

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Masaki Ito

Masaki Ito

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

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Kazuhiko Ikeda

Kazuhiko Ikeda

Department of Blood Transfusion and Transplantation Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan

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Hitoshi Ohto

Hitoshi Ohto

Department of Blood Transfusion and Transplantation Immunology, Fukushima Medical University School of Medicine, Fukushima, Japan

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Atsushi Kikuta

Corresponding Author

Atsushi Kikuta

Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima, Japan

Correspondence

Atsushi Kikuta, Department of Pediatric Oncology, Fukushima Medical University Hospital, Fukushima City, Fukushima, Japan.

Email: [email protected]

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First published: 28 August 2017
Citations: 7

Abstract

GF is one of the fatal complications of allogeneic HSCT. To rescue patients with primary GF, a second HSCT should be conducted as soon as possible, but the optimal donor source and technique have yet to be established. In this study, we retrospectively analyzed six children with hematologic malignancies who received TCR-haploidentical second HSCT for primary GF. The median interval between the prior HSCT and the second HSCT was 37.5 days. All patients received fludarabine and ATG containing reduced-intensity re-conditioning before the second HSCT. All patients, except one who died early, achieved both neutrophil and Plt engraftment at a median time of 15 and 33 days, respectively. Chimerism analysis showed that all engrafted patients achieved complete donor chimerism within 3 weeks. Four patients developed acute GVHD, and three patients developed chronic GVHD. TRM occurred in two patients. Median follow-up of the four survivors was 6.8 years, and all remained in sustained remission until the last follow-up. These results suggested that a TCR-haploidentical second HSCT for pediatric patients is feasible, and this approach may provide a potent option for children with primary GF.

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