Laboratory Medicine ›› 2019, Vol. 34 ›› Issue (12): 1066-1071.DOI: 10.3969/j.issn.1673-8640.2019.12.002

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Monitoring lymphocyte subsets after β-mediterranean anemia allogeneic hematopoetic stem cell transplantation in children

CHEN Shiyang1, FU Xiaoying1, XU Gang1, LIN Zhenhu1, LUO Meizhu1, MAI Huirong2, CHEN Yunsheng1, LIU Sixi2   

  1. 1. Department of Clinical Laboratory,Shenzhen Children's Hospital,Shenzhen 518038,Guangdong,China
    2. Department of Haematology and Oncology,Shenzhen Children's Hospital,Shenzhen 518038,Guangdong,China
  • Received:2018-08-22 Online:2019-12-30 Published:2020-01-03

Abstract:

Objective To monitor the development of lymphocyte subsets on the 1st,2nd,3rd,6th and 12th months dynamically after allogeneic hematopoetic stem cell transplantation(allo-HSCT) in children with β-mediterranean anemia,and to observe the immune reconstitution and characteristic of lymphocyte subsets. Methods A total of 27 patients with severe β-mediterranean anemia who underwent allo-HSCT were enrolled. Among them,20 cases received human leukocyte antigen(HLA) matched transplantation,and 7 cases received HLA mismatched transplantation. By flow cytometry,the percentage changes of CD3+T cells,CD3+CD4+T cells,CD3+CD8+T cells,CD4+/CD8+ratio,CD19+B cells and CD16+CD56+ natural killer(NK) cells were monitored dynamically in 1 year. Results CD16+CD56+ NK cells showed the fastest recovery,the percentages on the 1st,2nd,3rd and 6th months were higher than those of pre-operation(P<0.05),and it returned to the percentages of pre-operation on the 12th month(P>0.05). The percentage of CD3+T cells had no statistical significance on the 1st month compared to pre-operation(P>0.05),but it started to decrease on the 2nd month(P<0.01),and on the 12th month it was still lower than that of pre-operation(P<0.01). The percentage of CD3+CD8+ T cells on the 1st month was higher than that of pre-operation(P<0.01),and then it started to decrease but still high on the 12th month(P<0.05). The percentage of CD3+CD4+T cells was lower than that of pre-operation(P<0.01),showing a trend of slow recovery,and was still lower than that of pre-operation,even on the 12th month(P<0.01). CD4+/CD8+ ratio inverted in the long term,but it was still lower than that of pre-operation although it continued to show increase(P<0.01). CD19+ B cells decreased on the 1st month(P<0.01)then recovered after the 2nd month(P>0.05),which were higher than those of pre-operation at the 6th and 12th months(P<0.01,P<0.05). The immune reconstitution had no statistical significance at each time point between male and female patients(P>0.05),and so did HLA matched transplantation and mismatched transplantation(P>0.05). Conclusions The recovery of lymphocyte subsets after β-mediterranean anemia allo-HSCT in children following the regulation:CD16+CD56+ NK cells, CD3+CD8+ T cells,CD19+ B cells,CD3+ T cells and CD3+CD4+ T cells.

Key words: Lymphocyte subset, Allogeneic hematopoetic stem cell transplantation, Immune reconstitution, Children, Severe β-mediterranean anemia;

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