急性淋巴细胞白血病细胞β_2整合素及L-选择素的表达与意义

The expression of β_2 integrins and L-selectin on acute lymophocytic leukemic cells and its clinical implications

目的和方法 :研究急性淋巴细胞白血病 (ALL)细胞粘附分子 β2 整合素 (CD11a、CD11b)及L -选择素 (CD6 2L)的表达及其临床意义。用流式细胞仪检测 45例ALL及 2 5例正常人骨髓单个核细胞的CD11a、CD11b、CD6 2L表达。结果 :①CD11a、CD11b在ALL细胞上表达均明显低于正常人 ,CD11b低表达的阳性率为10 0 % ,5 0 %患者有CD11a低表达。而 6 0 %患者CD6 2L在ALL细胞上表达升高。②CD11a在B -ALL表达明显低于T -ALL表达 ,CD6 2L在B -ALL表达高于T -ALL。③浸润组CD11a表达高于非浸润组 (P <0 0 5 )。④ALL完全缓解组CD11a、CD11b的表达在正常范围。结论 :急性淋巴白血病细胞上存在多个粘附分子的表达异常 ,检测粘附分子有助于判断白血病细胞类型及疗效。

AIM and METHODS: To investigate the expression of adhesion molecule β 2 integrins (CD11a、CD11b) and L-selectin(CD62L )on Acute Lymophocyte Leukemia(ALL) cells and its Clinical Implications. Adhesion molecules CD11a、CD11b、 CD62L of 45 ALL patients and 25 health people were measured by flow-cytometric analysis. RESULTS:①CD11a and CD11b expression were lower on ALL cells than the normal hematopoietic cells. The rate of low expression was 100% for CD11b, 50% for CD11a,respectively. CD62L expression were higher on ALL cells than the normal hematopoietic cells.②The CD11a was lower expressed on B-ALL than T-ALL. CD62L was higher on T-ALL than B-ALL. ③ The expression of CD11a in the invasion group was much higher than that in the non-invasive group(P<0.05). ④ The levels of CD11a,CD11b were returned to normal levels at remission. CONCLUSION:These results suggest that there are abnormalities in the expression of cell adhesion molecules in ALL which may help identify ALL subtypes and the treatment effect.