Objective: To summarize changes of serum immunoglobulin levels before and after chemotherapy in children with Burkitt lymphoma (BL), so as to investigate the effects of chemotherapy and rituximab on serum immunoglobulin levels in children with BL. Methods: Clinical data of 223 children with newly diagnosed Burkitt lymphoma at Beijing Children's Hospital from January 2009 to April 2017 were analyzed retrospectively. They were treated according to the modified LMB 89 regimen and some of them received combined rituximab therapy during the chemotherapy. The serum immunoglobulin (IgA, IgM, IgG) before chemotherapy, at the time of discontinuing chemotherapy, as well as 6, 12, 24, 36 months after chemotherapy were collected. Changes of serum IgA, IgM and IgG with time among different treatment groups were compared using repeated measures ANOVA. Results: According to risk group, 223 children were devided into group B（n=53）and group C（n=170）. Before chemotherapy, 109 cases (48.9%) were combined with hypogammaglobulinemia. The serum IgA, IgM, and IgG levels of all the patients were (0.9±0.7), 1.2 (0.5, 1.3) and (7.2±2.9) g/L before chemotherapy, (0.5±0.4), 0.2 (0.1, 0.3) and (6.3±2.3) g/L at the time of discontinuing chemotherapy (t=13.63, Z=-11.99, t=4.57, all P<0.05). There were statistical difference in IgA, IgM levels of group B and IgA, IgM, IgG levels of group C before chemotherapy and at the time of discontinuing chemotherapy (t=8.86, Z=-6.28, t=11.19, Z=-10.15, t=4.50, all P<0.05). The differences of serum IgA and IgG levels at the time after chemotherapy among patients treated with chemotherapy alone and those treated with chemotherapy combined rituximab in group B and C were significant (F=5.38, P=0.002 and F=4.22, P=0.007). Conclusions: Approximately half of children with BL have already existed hypogammaglobulinemia at initial diagnosis prior to the start of treatment. The modified LMB 89 regimen have significant effect on humoral immunity of children with BL. In the process of immune reconstruction after chemotherapy, rituximab has more significant effect on serum IgA and IgG levels in BL patients.
目的： 总结新发伯基特淋巴瘤（BL）患儿化疗前后的血清免疫球蛋白水平，分析化疗以及利妥昔单抗对体液免疫功能的影响。 方法： 回顾性分析2009年1月至2017年4月北京儿童医院收治的223例新发危险度分组为B组及C组的BL患儿的临床资料。均按照改良的法国儿童肿瘤协会系列研究（LMB）89方案分层治疗，部分联合应用利妥昔单抗。分别于化疗前、化疗结束时及化疗结束后6、12、24、36个月检测血清免疫球蛋白水平（IgA、IgM、IgG）。不同治疗组间血清IgA、IgM、IgG随时间变化曲线的比较采用重复测量方差分析。 结果： 223例患儿危险度分组B组53例、C组170例。化疗前109例（48.9%）BL患儿合并低免疫球蛋白血症，223例患儿化疗前血清IgA、IgM、IgG水平分别为（0.9±0.7）、1.2（0.5，1.3）、（7.2±2.9）g/L。化疗结束时全组血清IgA、IgM、IgG水平分别为（0.5±0.4）、0.2（0.1，0.3）、（6.3±2.3）g/L，与化疗前相比差异均有统计学意义（t=13.63、Z=-11.99、t=4.57，均P<0.05）。另外B组IgA、IgM和C组IgA、IgM、IgG与化疗前比较差异也均有统计学意义（t=8.86、Z=-6.28、t=11.19、Z=-10.15、t=4.50，均P<0.05）。B组和C组单纯化疗、化疗联合利妥昔单抗治疗患儿化疗结束后IgA、IgG水平随时间变化趋势，差异有统计学意义（F=5.38，P=0.002；F=4.22，P=0.007）。 结论： 大约50%的BL患儿在化疗前即存在低免疫球蛋白血症，改良的LMB 89方案对BL患儿体液免疫功能有显著影响，在BL患儿化疗结束后免疫重建的过程中，利妥昔单抗对IgA和IgG影响更显著。.