Blood:十二指肠型滤泡性淋巴瘤

2018-08-21 MedSci MedSci原创

中心点:DTFL的免疫图谱与淋巴结型FL高度相关,但携带较少的KMT2D多发/等位基因突变。DTFL的免疫微环境与淋巴结型FL的显着不同,富集慢性炎症基因特征。摘要:十二指肠型滤泡性淋巴瘤(DTFL)是一种罕见的高度惰性的滤泡性淋巴瘤(FL)。其形态学和免疫表型与典型FL无明显区别,其特征是小肠黏膜限制性受损,无肠外表现。目前,造成其临床特征如此独特的分子机制基本尚不明确。Johannes C.

中心点:

DTFL的免疫图谱与淋巴结型FL高度相关,但携带较少的KMT2D多发/等位基因突变。

DTFL的免疫微环境与淋巴结型FL的显着不同,富集慢性炎症基因特征。

摘要:

十二指肠型滤泡性淋巴瘤(DTFL)是一种罕见的高度惰性的滤泡性淋巴瘤(FL)。其形态学和免疫表型与典型FL无明显区别,其特征是小肠黏膜限制性受损,无肠外表现。目前,造成其临床特征如此独特的分子机制基本尚不明确。

Johannes C. Hellmuth等研究人员对DTFL患者的38例活检样本进行评估。19位可进行临床评估的患者的10年总体存活率为100%。研究人员对DTFL(31例)、限制期典型FL(LSTFL,17例)和晚期典型FL(ASTFL,241例)的靶向突变图谱进行对比发现,三种FL之间常见突变基因(包括CRWBBP、TNFRSF14/HVEM和EZH2)的突频率无明显差别。但是,KMT2D在ASTFL中属于常见突变(77%),相比而言,在DTFL和LSTFL中属于不常见突变(45%和24%)。在ASTFL中,47%的KMT2D突变的病例在KMT2D上有多个突变,而在LSTFL中KMT2D上有多个突变的病例仅有12%(p=0.0)、在DTFL中则为0%(p<0.0001)。

对DTFL进行全外显子和靶向测序发现在EEF1A1和HVCN1上也存在高频突变(35%和22%)。研究人员将DTFL (n=8)和LSTFL (n=7)的免疫微环境基因表达特征进行对比,通过147个趋化因子和细胞因子的分层聚类发现,DTFL与LSTFL存在明显差异,DTFL会富集慢性炎症的特征。

总而言之,DTFL的突变谱与典型FL高度相关。DTFL和LSTFL的KMT2D多突变频率低提示KMT2D功能完全丧失在ASTFL发病过程中发挥重要作用。DTFL的免疫微环境与经典型FL高度不同,或可能在其发病过程中发挥关键作用。

原始出处:


Johannes C. Hellmuth, et al. Duodenal type and nodal follicular lymphoma differ by their immune microenvironment rather than their mutation profiles. Blood  2018  :blood-2018-03-837252;  doi: https://doi.org/10.1182/blood-2018-03-837252

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    2018-08-21 哈哈869

    学习了

    0

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    2018-08-21 lietome15

    不错的方式,努力学习,刻苦专研,不断总结出来新经验。给点个赞!

    0

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    2018-08-21 sunfeifeiyang

    0

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    2018-08-21 183****7028

    学习

    0

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    2018-08-21 chinadoctorliu_19344479

    很好,学习了

    0

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    2018-08-21 flysky120

    淋巴瘤本身就是难治疗

    0

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