Abstract:
:Memory stem T cells (TSCM) have been proposed as key determinants of immunologic memory. However, their exact contribution to a mounting immune response, as well as the mechanisms and timing of their in vivo generation, are poorly understood. We longitudinally tracked TSCM dynamics in patients undergoing haploidentical hematopoietic stem cell transplantation (HSCT), thereby providing novel hints on the contribution of this subset to posttransplant immune reconstitution in humans. We found that donor-derived TSCM are highly enriched early after HSCT. We showed at the antigen-specific and clonal level that TSCM lymphocytes can differentiate directly from naive precursors infused within the graft and that the extent of TSCM generation might correlate with interleukin 7 serum levels. In vivo fate mapping through T-cell receptor sequencing allowed defining the in vivo differentiation landscapes of human naive T cells, supporting the notion that progenies of single naive cells embrace disparate fates in vivo and highlighting TSCM as relevant novel players in the diversification of immunological memory after allogeneic HSCT.
journal_name
Bloodjournal_title
Bloodauthors
Cieri N,Oliveira G,Greco R,Forcato M,Taccioli C,Cianciotti B,Valtolina V,Noviello M,Vago L,Bondanza A,Lunghi F,Marktel S,Bellio L,Bordignon C,Bicciato S,Peccatori J,Ciceri F,Bonini Cdoi
10.1182/blood-2014-11-608539subject
Has Abstractpub_date
2015-04-30 00:00:00pages
2865-74issue
18eissn
0006-4971issn
1528-0020pii
blood-2014-11-608539journal_volume
125pub_type
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