Laboratory Medicine ›› 2016, Vol. 31 ›› Issue (6): 467-473.DOI: 10.3969/j.issn.1673-8640.2016.06.007

• Orginal Article • Previous Articles     Next Articles

Comparison of minimal residual leukemia immuno-phenotypes at primary diagnosis and after chemotherapy in patients with B-lineage acute lymphoblastic leukemia

WANG Jiying, LIU Yan, SONG Zhen, SHANG Lei, CHEN Xuejing, ZHOU Chunlin, RU Kun, WANG Huijun   

  1. Institute of Hematology and Blood Diseases Hospital,Chinese Academy of Medical Sciences and Peking Union Medical College,Tianjin 300020,China
  • Received:2015-12-06 Online:2016-06-30 Published:2016-07-05

Abstract:

Objective To study the change of leukemia immuno-phenotypes before and after chemotherapy in patients with B-lineage acute lymphoblastic leukemia(B-ALL),and to provide a reference for determining B-ALL minimal residual disease (MRD)by flow cytometry(FCM). Methods The antigen positive rate and intensity changes of CD45,CD19,CD10,CD20,CD34,CD38,CD13 and CD33 determined by FCM were analyzed before and after chemotherapy among 226 B-ALL patients. Results The intensity changes from high to low were CD10,CD34,CD38,CD19,CD20 and CD45. The intensity changes of CD10 were significantly higher than those of CD38,CD19,CD20 and CD45(P<0.01),the intensity changes of CD34 were higher than those of CD19,CD20 and CD45(P<0.01),and the intensity changes of CD38 were higher than those of CD20 and CD45(P<0.01). In the 33rd day of chemotherapy,the enhanced proportions of CD34 and CD45 expression were higher than those in the 15th day(P<0.05). The changes of antigen positive rate from high to low were CD20,CD38,CD34,CD45,CD10 and CD19,and those of CD20 and CD38 were significantly higher than those of CD34,CD45,CD10 and CD19(P<0.01). In the 33rd day of chemotherapy,the loss proportion of CD38 was higher than that in the 15th day(P<0.01),and the gain proportion of CD34 was significantly higher than that in the 15th day(P<0.01). In the 15th day, the loss proportion of CD10 was lower than those in the 33rd day and 48th day(P<0.05). Most patients after chemotherapy had 1-4 antigens' expression changes. Conclusions After chemotherapy,the proportions of antigen positive rate and intensity changes for immuno-phenotypes are high in B-ALL patients. In the determination of MRD,it should consider phenotypes at primary diagnosis and their changes during chemotherapy.

Key words: Immuno-phenotype, Flow cytometry, B-lineage acute lymphoblastic leukemia

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