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Erschienen in: Annals of Hematology 10/2015

01.10.2015 | Original Article

Early detection of cytomegalovirus-specific cytotoxic T lymphocytes against cytomegalovirus antigenemia in human leukocyte antigen haploidentical hematopoietic stem cell transplantation

verfasst von: Ruri Kato, Hiroya Tamaki, Kazuhiro Ikegame, Satoshi Yoshihara, Katsuji Kaida, Kyoko Taniguchi, Takayuki Inoue, Shinichi Ishii, Jun Nakata, Tatsuya Fujioka, Ryoji Eguchi, Toshihiro Soma, Masaya Okada, Hiroyasu Ogawa

Erschienen in: Annals of Hematology | Ausgabe 10/2015

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Abstract

Human leukocyte antigen (HLA)-haploidentical stem cell transplantation (haplo-SCT) is associated with a high incidence of cytomegalovirus (CMV) infection, probably originating from the delayed reconstitution of CMV-specific T cell immunity. There have been few reports on the presence of CMV-specific cytotoxic T lymphocytes (CMV-CTLs) after haplo-SCT. We have studied CMV-specific immune reconstitution by measuring the absolute number of CMV-CTLs using a flow cytometry method with HLA-A2-restricted NLVPMVATV peptide dextramers. We examined the association between reconstitution patterns of CMV-CTLs and the duration of CMV antigenemia in 15 patients who underwent first allogeneic SCT from HLA-haploidentical-related donors with HLA-A2. In seven and eight patients, CMV antigenemia consecutively resolved for more than 4 weeks (the CMV antigenemia ‘resolved’ group) and intermittently persisted (the CMV antigenemia ‘persistent’ group) during a 100-day observation period, respectively. The group of the seven patients, in whom levels of CMV antigenemia were reduced to zero, had a significantly lower maximum level of CMV antigenemia than the CMV antigenemia persistent group. In contrast, the CMV antigenemia persistent group had a significantly higher maximum level of CMV-CTLs, but the levels took longer to peak. Despite no difference in general lymphocyte recovery between the two groups, the CMV antigenemia resolved group had significantly higher median CMV-CTL counts than the CMV antigenemia persistent group at 6 weeks after onset of CMV infection. Flow cytometry analysis of CMV-CTLs is a convenient method of monitoring reconstitution of CMV-specific lymphocyte immunity following haplo-SCT.
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Metadaten
Titel
Early detection of cytomegalovirus-specific cytotoxic T lymphocytes against cytomegalovirus antigenemia in human leukocyte antigen haploidentical hematopoietic stem cell transplantation
verfasst von
Ruri Kato
Hiroya Tamaki
Kazuhiro Ikegame
Satoshi Yoshihara
Katsuji Kaida
Kyoko Taniguchi
Takayuki Inoue
Shinichi Ishii
Jun Nakata
Tatsuya Fujioka
Ryoji Eguchi
Toshihiro Soma
Masaya Okada
Hiroyasu Ogawa
Publikationsdatum
01.10.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Annals of Hematology / Ausgabe 10/2015
Print ISSN: 0939-5555
Elektronische ISSN: 1432-0584
DOI
https://doi.org/10.1007/s00277-015-2446-4

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