典型与不典型免疫表型慢性淋巴细胞白血病的预后相关因素分析

目的 探讨典型免疫表型慢性淋巴细胞白血病(CLL)与不典型CLL在临床特征、Binet分期、淋巴细胞绝对计数(ALC)、ZAP-70蛋白表达、CD38表达、IgVH突变和遗传学特性等预后因素上的差异.方法 参照英国CLL临床指南诊断评分系统,77例患者中积分5分的有61例,为典型CLL,积分为4分或3分的有16例,为不典型CLL.采用多参数流式细胞术(FCM)对77例CLL患者的外周血或骨髓标本进行免疫表型检测,包括CD5、CD19、CD23、FMC7、slg(κ和λ)、CD20、CD79b,并检测预后相关因素ZAP-70和CD38的表达水平;采用多重RT-PCR检测IgVH基因突变状态;组合探针荧光原位杂交(FISH)技术检测分子遗传学异常.结果 典型CLL与不典型CLL两组患者在性别、年龄、IgVH基因突变率、ZAP70表达上的差异均无统计学意义(P值分别为0.398、0.189、0.268和0.131);不典型CLL组中ALC≥50×109/L、Binet B+C期和CD38 阳性率≥30%所占比例(分别为43.8%、87.5%、43.8%)明显高于典型CLL组(分别为16.4%、36.1%、16.4%)(P=0.026、P<0.01和P=0.026);典型与不典型CLL组的分子遗传学结果也有显著差异,典型CLL组中单独伴有del(13q14)异常的比例(26.8%)大于不典型组(7.6%),而del(17p13)或del(11q22)异常的比例(12.2%)小于不典型组(46.2%)(P=0.022).结论 典型免疫表型CLL与不典型CLL在Binet分期、ALC、CD38表达和遗传学特性上有显著差异.

Prognostic factors for chronic lymphocytic leukemia with typical and atypical immunophenotype

Objective To analyze the proguostic factors for chronic lymphocytic leukemia (CLL) with typical and atypical immunophenotype. The parameters analyzed included sex, age, Binet stages, abso-lute lymphocyte count (ALC), immunoglobulin heavy-chain variable region (IgVH) gene mutation status, ZAP-70 protein, CD38 expression and cytogenetic aberrations. Methods According to the clinical guideline and scoring system for CLL in Britain, among 77 patients, 61 patients with score 5 called typical immunophe-notype CLL, 16 with score 4 or 3 were atypical immunophenotype CI,L. Multiparameter flow cytometry was employed for immunophenotypic analysis in 77 CLL patients for CD5, CD19, CD23, FMC7, slg, CD20, CD79h expression and ZAP-70 protein and CD38. IgVH mutation status was detected by multiplex RT-PCR and sequencing of the purified PCR amplification products. Fluorescence in situ hybridization (FISH) and a panel of probes were used to detect cytogenetic aberrations. Results There was no significant difference be-tween the two groups in sex, age, ZAP-70 and IgVH mutation status (P =0.398, P =0. 189, P =0.268 and P =0. 131, respectively). The incidence of ALC≥50 × 109/L, Binet B + C, CD38 ≥30% in atypical CLL patients(43.8%, 87.5% and 43.8%, respectively) were higher than that in typical group (16.4%, 36.1% and 16.4%, respectively) (P = 0. 026, P < 0. 01 and P = 0. 026, respectively). The proportion of typical patients (26. 8%) with a 13q14 deletion as sole abnormality was higher than that of atypical patients (7.6%), and that with deletion of 11q22 or 17p13 was lower than that of atypical patients (12.2% vs 46.2%) (P = 0. 022). Conclusion There were obvious differences between the typical immunophenotype CLL and atypical CLL in ALC, Binet stages, CD38 expression level and cytogenetic aberrations.