PMID- 26193851 OWN - NLM STAT- MEDLINE DCOM- 20151120 LR - 20150904 IS - 1432-0584 (Electronic) IS - 0939-5555 (Linking) VI - 94 IP - 10 DP - 2015 Oct TI - Early detection of cytomegalovirus-specific cytotoxic T lymphocytes against cytomegalovirus antigenemia in human leukocyte antigen haploidentical hematopoietic stem cell transplantation. PG - 1707-15 LID - 10.1007/s00277-015-2446-4 [doi] AB - 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. FAU - Kato, Ruri AU - Kato R AD - Division of Hematology, Department of Internal Medicine, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya City, Hyogo, 663-8501, Japan, kato.ruri@k.nissay-hp.or.jp. FAU - Tamaki, Hiroya AU - Tamaki H FAU - Ikegame, Kazuhiro AU - Ikegame K FAU - Yoshihara, Satoshi AU - Yoshihara S FAU - Kaida, Katsuji AU - Kaida K FAU - Taniguchi, Kyoko AU - Taniguchi K FAU - Inoue, Takayuki AU - Inoue T FAU - Ishii, Shinichi AU - Ishii S FAU - Nakata, Jun AU - Nakata J FAU - Fujioka, Tatsuya AU - Fujioka T FAU - Eguchi, Ryoji AU - Eguchi R FAU - Soma, Toshihiro AU - Soma T FAU - Okada, Masaya AU - Okada M FAU - Ogawa, Hiroyasu AU - Ogawa H LA - eng PT - Journal Article DEP - 20150722 PL - Germany TA - Ann Hematol JT - Annals of hematology JID - 9107334 RN - 0 (HLA Antigens) SB - IM MH - Adult MH - Cytomegalovirus/*immunology/isolation & purification MH - Cytomegalovirus Infections/*diagnosis/*immunology/mortality MH - Female MH - Follow-Up Studies MH - HLA Antigens/*immunology MH - Haplotypes MH - Hematopoietic Stem Cell Transplantation/*adverse effects MH - Humans MH - Male MH - Middle Aged MH - Survival Rate/trends MH - T-Lymphocytes, Cytotoxic/*immunology/virology MH - Transplantation, Homologous EDAT- 2015/07/22 06:00 MHDA- 2015/12/15 06:00 CRDT- 2015/07/22 06:00 PHST- 2014/10/15 00:00 [received] PHST- 2015/07/07 00:00 [accepted] PHST- 2015/07/22 06:00 [entrez] PHST- 2015/07/22 06:00 [pubmed] PHST- 2015/12/15 06:00 [medline] AID - 10.1007/s00277-015-2446-4 [doi] PST - ppublish SO - Ann Hematol. 2015 Oct;94(10):1707-15. doi: 10.1007/s00277-015-2446-4. Epub 2015 Jul 22.