Blood:免疫抑制下发生的EBV相关原发性CNS淋巴瘤是一种独特的疾病

2021-03-19 MedSci原创 MedSci原创

原发性中枢神经系统淋巴瘤(PCNSL)是一种罕见的结外非霍奇金淋巴瘤(NHL),局限于大脑、眼睛和脑脊液,不见全身性扩散的迹象。

原发性中枢神经系统淋巴瘤(PCNSL)是一种罕见的结外非霍奇金淋巴瘤(NHL),局限于大脑、眼睛和脑脊液,不见全身性扩散的迹象。很少有PCNSL发生在免疫抑制的背景下的(如移植后淋巴细胞增生性疾病或HIV[AIDS相关PCNSL])。

发生在免疫抑制背景下的PCNSL的特征不明确,预后差,通常与EB病毒(EBV)相关。

研究人员采用靶向测序和数字多重基因表达,研究了91例具有弥漫性大B细胞淋巴瘤组织学特性的PCNSL组织的遗传图谱和肿瘤微环境(TME),并根据EBV组织和HIV状态进行分层。

检测分组示意图

47例为EBV组织阴性:45例 EBV- HIV- PCNSL和2例 EBV- HIV+ PCNSL;

44例为EBV组织阳性:23例 EBV+ HIV+ PCNSL和21例 EBV+ HIV- PCNSL。

PCNSL的突变情况统计

与既往研究一样,EBV- HIV- PCNSL经常发生MYD88、CD79B和PIM1突变,且富含激活的B细胞(ABC)起源的亚型细胞。相反,在所有EBV组织阳性病例中都没有这些突变,且ABC频率低。

HLA I/II和抗原呈递/加工基因的拷贝数变异

此外,很少观察到HLA I/II类和抗原呈递/加工基因的拷贝数缺失,提示抗原呈递功能正常。

不同状态的PCNSL的肿瘤微环境成分

研究人员进一步发现,EBV+ HIV- PCNSL具有致耐受性的TME,表现为巨噬细胞增多和免疫检查点基因表达,但与AIDS相关的PCNSL的CD4基因计数较低。

免疫抑制背景下发生的与EBV相关的PCNSL在免疫生物学上不同于EBV-HIV- PCNSL,尽管感染了免疫原性病毒,但仍具有呈递EBV抗原的能力。

原始出处:

M. K. Gandhi, et al. EBV-associated primary CNS lymphoma occurring after immunosuppression is a distinct immunobiological entity. Blood. March 18, 2021.

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    2021-08-11 lg.zhao
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    2021-03-23 13d789bam70暂无昵称

    学习了,好文章

    0

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    2021-03-20 yelinghao215

    厉害

    0

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    2021-03-19 jyzxjiangqin

    好文章!

    0

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