Influence of Differently Licensed KIR2DL1-Positive Natural Killer Cells in Transplant Recipients with Acute Leukemia: A Japanese National Registry Study

Nobuyoshi Arima, Fumiaki Nakamura, Toshio Yabe, Junji Tanaka, Shigeo Fuji, Kazuteru Ohashi, Takahiro Fukuda, Koichi Miyamura, Koji Iwato, Tetsuya Eto, Takehiko Mori, Naoki Kobayashi, Takumi Hoshino, Chiaki Kato, Heiwa Kanamori, Hirohisa Nakamae, Yoshiko Atsuta, Yasuo Morishima, Yoshinobu Kanda

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Licensing by self MHC class I ligands is required for proper natural killer (NK) cell response. NK cells with inhibitory killer cell immunoglobulin-like receptors for nonself MHC exhibit transient alloreactivity after hematopoietic stem cell transplantation (HSCT). We analyzed 3866 recipients in the Japan national registry who underwent their first allogeneic HSCT for acute myeloid leukemia (AML) or acute lymphoblastic leukemia (ALL) from HLA-A, -B, and -DRB1 allele-genomatched unrelated donors. By classifying them into 5 independent groups based on HLA-C group matching and assumed donor NK cell status, we found that for HLA-C–matched HSCT for AML in HLA-C1/C1 recipients, in whom transient alloreactivity against HLA-C2–negative leukemic cells was expected, the relapse rate was significantly lower than it was in HLA-C–matched HSCT for AML in HLA-C1/C2 recipients (hazard ratio [HR],.72; P = .011). This difference was not observed in HLA-C–matched HSCT for ALL. Compared with HLA-C–matched HSCT, significantly higher mortality was observed in HLA-C1/C1 AML patients who received transplants from HLA-C–mismatched HLA-C1/C1 donors (HR, 1.37; P = .001) and in HLA-C1/C1 ALL patients who received transplants from HLA-C2–positive donors (HR, 2.13; P = .005). In conclusion, donor selection based on leukemic subtype and donor HLA-C group matching improves transplantation outcome after HLA-C–mismatched HSCT.

Original languageEnglish
Pages (from-to)423-431
Number of pages9
JournalBiology of Blood and Marrow Transplantation
Volume22
Issue number3
DOIs
Publication statusPublished - 2016 Mar 1

Keywords

  • Acute leukemia
  • Allogeneic hematopoietic stem cell transplantation
  • HLA-C mismatch
  • Killer cell immunoglobulin-like receptor
  • Natural killer cell

ASJC Scopus subject areas

  • Hematology
  • Transplantation

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    Arima, N., Nakamura, F., Yabe, T., Tanaka, J., Fuji, S., Ohashi, K., Fukuda, T., Miyamura, K., Iwato, K., Eto, T., Mori, T., Kobayashi, N., Hoshino, T., Kato, C., Kanamori, H., Nakamae, H., Atsuta, Y., Morishima, Y., & Kanda, Y. (2016). Influence of Differently Licensed KIR2DL1-Positive Natural Killer Cells in Transplant Recipients with Acute Leukemia: A Japanese National Registry Study. Biology of Blood and Marrow Transplantation, 22(3), 423-431. https://doi.org/10.1016/j.bbmt.2015.09.029