T细胞急性淋巴细胞白血病免疫表型分析

本研究探讨T细胞急性淋巴细胞白血病（T-ALL）免疫表型特点。应用一组系列相关单克隆抗体和CD45/SSC设门的三色流式细胞术对140例T-ALL进行免疫表型检测。结果显示,白血病细胞表面T系抗原表达依次为CD7〉CD2〉CD3〉CD5,近20%患者CD10表达阳性。140例患者中12例带有B系抗原标记,阳性率达8.57%;136例中31例带有髓系抗原标记,阳性率达22.79%,所有病例均无CD14表达。干/祖细胞标记CD34表达阳性率31.06%,41例CD34＋T-ALL髓系抗原表达15例,阳性率36.59%,91例CD34-T-ALL髓系抗原表达14例,阳性率15.38%,二者具有统计学差异（p〈0.01）。儿童T-ALLCD3表达高于成人（p〈0.05）,而CD33表达明显低于成人（p〈0.01）结论：免疫表型分析是诊断T-ALL的重要手段,T-ALL免疫表型具有异质性。

Immunophenotyping Characteristics of T-cell Acute Lymphoblastic Leukemia

The objective of this study was to investigate the immunophenotypic characteristics of T-cell acute lymphoblastic leukemia (T-ALL). Immunophenotyping was performed in 140 T-ALL patients by flow cytometry using a panel of monoclonal antibodies and CD45/SSC gating. The results showed that the T-lineage-associated antigen expressions were CD7>CD2>CD3>CD5 successively. The positive rate of CD10 was 19.42% in patients. Among 140 cases of T-ALL, 12 (8.57%) was accompanied by B-lineage associated antigen expression. Myeloid antigen expression was identified in 31 out of 136 cases (22.79%). None of them expressed CD14 antigen. The positive rate of CD34 was 31.06%. The positive rate of myeloid antigen expression in CD34+ T-ALL (36.58%) was significantly higher than that in CD34-T-ALL (15.38%) (p<0.01). The expression of CD3 in child T-ALL was higher than that in adult T-ALL, whereas the expression of CD33 in children was lower than that in adults. It is concluded that immunophenotyping is an important tool for diagnosis of T-ALL. Immunophenotypic characteristics of T-ALL is heterogeneous.