Early recovery of CD4 T cell receptor diversity after "lymphoablative" conditioning and autologous CD34 cell transplantation.
Early recovery of CD4 T cell receptor diversity after "lymphoablative" conditioning and autologous CD34 cell transplantation.
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“淋巴清除”调理和自体 CD34 细胞移植后 CD4 T 细胞受体多样性的早期恢复。
DOI:
10.1016/j.bbmt.2008.09.013
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发表时间:
2008
期刊:
影响因子:
--
通讯作者:
Maloney,DavidG
中科院分区:
文献类型:
--
作者:
Storek,Jan;Zhao,Zhao;Liu,Yiping;Nash,Richard;McSweeney,Peter;Maloney,DavidG
T cell diversity posttransplantation is thought to be severely restricted, based on T cell receptor β-chain immunophenotyping or spectratyping. Using β-chain sequencing, we studied CD4 T cell diversity in 2 adult patients undergoing “lymphoablative” conditioning with cyclophosphamide (Cy), total body irradiation (TBI), and antithymocyte globulin (ATG) and autologous transplantation of hematopoietic cells depleted of T cells by enrichment for CD34 cells. The indication for the transplantation was systemic sclerosis (SSc) or multiple sclerosis (MS). Pretransplantation, the estimated number of distinct β chains (the minimum number of CD4 T cell clones) in the 2 patients was 600,000 to 700,000, similar to the number in a healthy control. This number was 200,000 to 500,000 at 1 month posttransplantation and 400,000 to 1,600,000 at 12 months posttransplantation. In conclusion, the number of T cells early after lymphoablative conditioning and autologous CD34 cell transplantation may be more diverse than previously appreciated, possibly because many T cell clones survive the conditioning or are reinfused with the graft. Thus, the therapy may not be completely T cell lymphoablative.
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