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Resistance of KIR ligand-missing leukocytes to natural killer cells in vivo in patients with acquired aplastic anemia
- フォーマット:
- 論文
- 責任表示:
- Nguyen Thi, Mai Anh ; Hosokawa, Kohei ; Yoroidaka, Takeshi ; Maruyama, Hiroyuki ; Espinoza, J. Luis ; Elbadry, Mahmoud I. ; Md, Mohiuddin ; Tanabe, Mikoto ; Katagiri, Takamasa ; Nakagawa, Noriharu ; Arima, Nobuyoshi ; Kashiwase, Koichi ; Saji, Hiroh ; Ogawa, Seishi ; Nakao, Shinji ; 細川, 晃平 ; 片桐, 孝和 ; 中尾, 眞二
- 言語:
- 英語
- 出版情報:
- The American Association of Immunologists, 2020-07-01
- 著者名:
- 掲載情報:
- ImmunoHorizons
- ISSN:
- 2573-7732
- 巻:
- 4
- 通号:
- 7
- 開始ページ:
- 430
- 終了ページ:
- 441
- バージョン:
- author
- 概要:
- 金沢大学医薬保健研究域医学系 Graduate School of Medical Sciences<br />The loss of killer cell immunoglobulin-like receptor-ligands (KIR-Ls) due to the copy number neutral loss of heterozygosity of chromosome 6p (6pLOH) in leukocytes of patients wit … h acquired aplastic anemia (AA) may alter the susceptibility of the affected leukocytes to NK cell killing in vivo. We studied 408 AA patients, including 261 who were heterozygous for KIR-Ls, namely C1/C2 or Bw6/Bw4, for the presence of KIR-L-missing (KIR-L[-]) leukocytes. KIR-L(-) leukocytes were found in 14 (5.4%, C1, n= 4, C2, n=3, and Bw4, n= 7) of the 261 patients, in whom corresponding KIR(+) licensed NK cells were detected. The incidence of 6pLOH in the 261 patients (18.0%) was comparable to that in 147 patients (13.6%) who were homozygous for KIR-L genes. The percentages of HLA-lacking granulocytes (0.8-50.3%, median 15.2%) in the total granulocytes of the patients with KIR-L(-) cells were significantly lower than those (1.2-99.4%, median 55.4%) in patients without KIR-L(-) cells. KIR2DS1 and KIR3DS1 were only possessed by three of the 14 patients, two of whom had C2/C2 leukocytes after losing C1 alleles. The expression of the KIR3DS1 ligand HLA-F was selectively lost on KIR-L(-) primitive hematopoietic stem cells (HSCs) derived from 6pLOH(+) iPS cells in one of the KIR3DS1(+) patients. These findings suggest that human NK cells are able to suppress the expansion of KIR-L(-) leukocytes but are unable to eliminate them partly due to the lack of activating KIRs on NK cells and the low HLA-F expression level on HSCs in AA patients.<br />Embargo Period 6 months 続きを見る
- URL:
- http://hdl.handle.net/2297/00058826
類似資料:
金沢大学医薬保健研究域医学系 | |
4
論文
Frequent loss of HLA alleles associated with copy number-neutral 6pLOH in acquired aplastic anemia
American Society of Hematology |
金沢大学医薬保健研究域医学系 |