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JCO:分子图谱有助于外周T细胞淋巴瘤分类

2013-07-26 MedSci MedSci原创

据一项最新研究结果表明,高达30%的外周T细胞淋巴瘤被误诊,但如今借助分子图谱可以解决这个问题。相关的研究数据在线发表于7月15日的临床肿瘤学杂志中。(J Clin Oncol 2013 Jul 15;)T细胞淋巴瘤研究组和国际外周T细胞淋巴瘤项目的研究人员说,分子图谱可以区分血管免疫母细胞性T细胞淋巴瘤(AITL)、间变性大细胞淋巴瘤(ALCL)和非特指型(NOS)外周T细胞淋巴瘤(PTCL)。

据一项最新研究结果表明,高达30%的外周T细胞淋巴瘤被误诊,但如今借助分子图谱可以解决这个问题。相关的研究数据在线发表于7月15日的临床肿瘤学杂志中。(J Clin Oncol 2013 Jul 15;)

T细胞淋巴瘤研究组和国际外周T细胞淋巴瘤项目的研究人员说,分子图谱可以区分血管免疫母细胞性T细胞淋巴瘤(AITL)、间变性大细胞淋巴瘤(ALCL)和非特指型(NOS)外周T细胞淋巴瘤(PTCL)。

研究人员指出,这些淋巴瘤可能预后不同,需要不同的治疗方法。

为了测试基因表达谱为基础的分子分类对于鉴别PTCO NOS和AITL以及ALCL的准确性,评估其潜在临床意义,意大利Bologna大学Pier Paolo Piccaluga博士和他的同事研究了244个淋巴结PTCLs。

总的来说,158例是PTCLNOS,AITL 63例,21例ALK阴性ALCL(即间变性淋巴瘤激酶(ALK)-阴性)。

该研究区分了PTCL NOS和AITL的基因涉及脂质代谢、DNA复制和细胞周期调控。PTCLNOS与ALK阴性ALCL存在差异表达的基因参与调控细胞凋亡、蛋白激酶级联反应和免疫反应。

AITL预测模型对43例AITLs中的31例,78 例PTCLNOS中的62例进行了准确分类,整体的诊断准确率77%。同样地, ALCL预测模型对11例 ALCLS中的8例,78例PTCL NOS中的73例进行了准确分类,总体诊断的准确性为93%。

当用常规方法对患者进行分类,ALK阴性ALCL与PTCLNOS相比,平均总存活有延长的趋势(1,484vs 395天,P = 0.62)。但是,采用分子分型对患者进行重新分类后,存活差异就具有统计学意义了(1,570 vs 391天,P= 0.01)。另一方面,两种方法都没有发现PTCL NOS和AITL的存活存在差异。

“我们的发现支持使用分子分类作为淋巴结PTCLs诊断的一个额外工具,”作者说。 “”我们能够显著地限制用于有效分类的基因数量,使迅速确定患者个体化检测成为可能,可有效检测福尔马林固定的石蜡包埋(FFPE)样品。

“我们的研究发现基因标记能够有效区分FFPE组织的淋巴结PTCLs,这对疾病的诊断是有用的工具,”研究人员得出结论。“Bologna大学获得了意大利专利和商标局诊断分类分子标记的专利。”

Piccaluga博士没有对该研究进行评论。

原始出处:

Piccaluga PP, Fuligni F, De Leo A, Bertuzzi C, Rossi M, Bacci F, Sabattini E, Agostinelli C, Gazzola A, Laginestra MA, Mannu C, Sapienza MR, Hartmann S, Hansmann ML, Piva R, Iqbal J, Chan JC, Weisenburger D, Vose JM, Bellei M, Federico M, Inghirami G, Zinzani PL, Pileri SA. Molecular Profiling Improves Classification and Prognostication of Nodal Peripheral T-Cell Lymphomas: Results of a Phase III Diagnostic Accuracy Study.J Clin Oncol. 2013 Jul 15.

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    2013-08-22 lidong40
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