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Iemura T, Arai Y, Kitawaki T, Kanda J, Kondo T, Ueda Y, Mori T, Imada K, Yonezawa A, Yago K, Anzai N, Kotani S, Nohgawa M, Kitano T, Itoh M, Arima N, Moriguchi T, Watanabe M, Tsuji M, Yamashita K, Takaori-Kondo A. Coexistence of HLA and KIR ligand mismatches as a risk factor for viral infection early after cord blood transplantation. Bone Marrow Transplant 2022; 57:781-789. [PMID: 35236933 DOI: 10.1038/s41409-022-01621-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 11/09/2022]
Abstract
Viral infection is one of the lethal adverse events after cord blood transplantation (CBT). Human leukocyte antigen (HLA) and killer immunoglobulin-like receptor (KIR) ligand divergences can increase the risk of viral infection due to conflicting interactions between virus-infected cells and immune cells. However, the relationship between these disparities and the frequency of viral infection after CBT remains to be evaluated. Herein, we have conducted a retrospective multicenter study to assess the effect of HLA and KIR ligand mismatches on viral infections after CBT. The study included 429 patients, among which 126 viral infections occurred before day 100. Viral infection was significantly associated with poorer overall survival (OS; hazard ratio [HR] 1.74, p < 0.01). Patients harboring ≥3 mismatches in the HLA allele and inhibitory KIR ligand mismatches (HLA & KIR mismatches) had a significantly greater prevalence of viral infection (HR 1.66, p = 0.04). Thus, patients with HLA & KIR mismatches had poorer outcomes in terms of non-relapse mortality (HR 1.61, p = 0.05). Our study demonstrates the unfavorable impacts of HLA & KIR mismatches on viral infections and non-relapse mortality after CBT. Evaluating the viral infection risk and performance of an appropriate and early intervention in high-risk patients and optimizing the graft selection algorithm could improve the outcome of CBTs.
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Affiliation(s)
- Tomoki Iemura
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yasuyuki Arai
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan. .,Department of Clinical Laboratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan.
| | - Toshio Kitawaki
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Junya Kanda
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Tadakazu Kondo
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Yasunori Ueda
- Department of Hematology/Oncology, Kurashiki Central Hospital, Okayama, Japan
| | - Takuto Mori
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan.,Department of Hematology, Kobe City Medical Center General Hospital, Hyogo, Japan
| | - Kazunori Imada
- Department of Hematology, Japanese Red Cross Osaka Hospital, Osaka, Japan
| | - Akihito Yonezawa
- Department of Hematology, Kokura Memorial Hospital, Fukuoka, Japan
| | - Kazuhiro Yago
- Department of Hematology, Shizuoka General Hospital, Shizuoka, Japan
| | - Naoyuki Anzai
- Department of Hematology, Takatsuki Red Cross Hospital, Osaka, Japan
| | | | - Masaharu Nohgawa
- Deparment of Hematology, Japanese Red Cross Wakayama Medical Center, Wakayama, Japan
| | | | - Mitsuru Itoh
- Department of Hematology, Kyoto City Hospital, Kyoto, Japan
| | | | | | - Mitsumasa Watanabe
- Department of Hematology, Hyogo Prefectural Amagasaki General Medical Center, Hyogo, Japan
| | - Masaaki Tsuji
- Department of Hematology, Japan Red Cross Otsu Hospital, Shiga, Japan
| | - Kouhei Yamashita
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Akifumi Takaori-Kondo
- Department of Hematology and Oncology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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