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Hashimoto H, Kitano S, Yamagata S, Miyagi Maeshima A, Ueda R, Ito A, Tada K, Fuji S, Yamashita T, Tomura D, Nukaya I, Mineno J, Fukuda T, Mori S, Takaue Y, Heike Y. Donor lymphocytes expressing the herpes simplex virus thymidine kinase suicide gene: detailed immunological function following add-back after haplo-identical transplantation. Cytotherapy 2015; 17:1820-30. [PMID: 26452983 DOI: 10.1016/j.jcyt.2015.08.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Revised: 08/07/2015] [Accepted: 08/13/2015] [Indexed: 01/26/2023]
Abstract
BACKGROUND AIMS Haplo-identical hematopoietic stem cell transplantation (HSCT) with add-back of donor lymphocytes expressing the herpes simplex virus thymidine kinase suicide gene (TK cells) is one of the most widely applied promising new gene therapy approaches. However, the immunological status of added-back TK cells after HSCT has yet to be well characterized. METHODS We investigated TK cells through the use of flow cytometry, T-cell receptor (TCR) Vβ repertoire spectratyping and linear amplification-mediated polymerase chain reaction followed by insertion site analysis in a patient enrolled in our clinical trial. RESULTS A comparison of onset with remission of acute graft-versus-host disease confirmed that TK cells were predominantly eliminated and that proliferative CD8(+) non-TK cells were also depleted in response to ganciclovir administration. The TCR Vβ-chain repertoire of both TK cells and non-TK cells markedly changed after administration of ganciclovir, and, whereas the TCR repertoire of non-TK cells returned to a normal spectratype long after transplantation, that of TK cells remained skewed. With the long-term prophylactic administration of acyclovir, TK cells oligoclonally expanded and the frequency of spliced variants of TK cells increased. Known cancer-associated genes were not evident near the oligoclonally expanded herpes simplex virus (HSV)-TK insertion sites. CONCLUSIONS We demonstrate obvious differences in immunological status between TK cells and non-TK cells. In addition, we speculate that long-term prophylactic administration of acyclovir increases the risk of oligoclonal expansion of spliced forms of TK cells.
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Affiliation(s)
- Hisayoshi Hashimoto
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | - Shigehisa Kitano
- Department of Experimental Therapeutics, National Cancer Center Hospital, Tokyo, Japan; Division of Cancer Immunotherapy, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Tokyo, Japan
| | - Shizuka Yamagata
- Department of Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan
| | - Akiko Miyagi Maeshima
- Division of Pathology and Clinical Laboratories, National Cancer Center Hospital, Tokyo, Japan
| | - Ryosuke Ueda
- Division of Molecular and Cellular Medicine, National Cancer Center Research Institute, Tokyo, Japan
| | - Ayumu Ito
- Department of Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan
| | - Kohei Tada
- Division of Cancer Immunotherapy, Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, Tokyo, Japan; Department of Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan
| | - Shigeo Fuji
- Department of Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan
| | - Takuya Yamashita
- Department of Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan
| | - Daisuke Tomura
- Center for Cell and Gene Therapy, Takara Bio Inc, Tokyo, Japan
| | - Ikuei Nukaya
- Center for Cell and Gene Therapy, Takara Bio Inc, Tokyo, Japan
| | - Junichi Mineno
- Center for Cell and Gene Therapy, Takara Bio Inc, Tokyo, Japan
| | - Takahiro Fukuda
- Department of Hematopoietic Stem Cell Transplantation, National Cancer Center Hospital, Tokyo, Japan
| | - Shinichiro Mori
- Department of Hematology and Oncology, St Luke's International University and Hospital, Tokyo, Japan
| | - Yoichi Takaue
- Research Planning and Management Department, St Luke's International University and Hospital, Tokyo, Japan
| | - Yuji Heike
- Immunotherapy and Cell Therapy Service, St Luke's International University and Hospital Tokyo, Japan; Laboratory for Joint Research and Development, St Luke's International University and Hospital, Tokyo, Japan.
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