Abstract:
:We studied T-cell reconstitution in 31 primary T-cell-immunodeficient patients who had undergone hematopoietic stem-cell transplantation (HSCT) over 10 years previously. In 19 patients, there was no evidence of myeloid chimerism because little or no myeloablation had been performed. Given this context, we sought factors associated with good long-term T-cell reconstitution. We found that all patients having undergone full myeloablation had donor myeloid cells and persistent thymopoiesis, as evidenced by the presence of naive T cells carrying T-cell receptor excision circles (TRECs). In 9 patients with host myeloid chimerism, sustained thymic output was also observed and appeared to be associated with gammac deficiency. It is therefore possible that the complete absence of thymic progenitors characterizing this condition created a more favorable environment for thymic seeding by a population of early progenitor cells with the potential for self-renewal, thus enabling long-term (> 10 years) T-cell production.
journal_name
Bloodjournal_title
Bloodauthors
Cavazzana-Calvo M,Carlier F,Le Deist F,Morillon E,Taupin P,Gautier D,Radford-Weiss I,Caillat-Zucman S,Neven B,Blanche S,Cheynier R,Fischer A,Hacein-Bey-Abina Sdoi
10.1182/blood-2006-07-029090subject
Has Abstractpub_date
2007-05-15 00:00:00pages
4575-81issue
10eissn
0006-4971issn
1528-0020pii
blood-2006-07-029090journal_volume
109pub_type
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