Clinical application of genomic aberrations in adult T-cell leukemia/lymphoma

被引:11
作者
Kataoka, Keisuke [1 ]
Koya, Junji [1 ]
机构
[1] Natl Canc Ctr, Res Inst, Div Mol Oncol, Tokyo, Japan
关键词
Adult T-cell leukemia/lymphoma; genetic alterations; T-cell receptor signaling; immune evasion; clinical application; NF-KAPPA-B; CONSTITUTIVE ACTIVATION; GENETIC ALTERATIONS; LEUKEMIA-LYMPHOMA; PROGNOSTIC INDEX; STAT3; MUTATIONS; EXPRESSION; KINASE; BLOCKADE; PD-L1;
D O I
10.3960/jslrt.20019
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Adult T-cell leukemia/lymphoma (ATL) is an aggressive peripheral T-cell malignancy with a markedly poor prognosis. The low prevalence of ATL among human T-cell leukemia virus type-1 (HTLV-1) carriers and the long latency period before ATL onset suggest that additional genetic lesions are required for ATL leukemogenesis. Recently, a large-scale genetic analysis clarified the entire picture of genetic alterations, identified a number of novel driver genes, and delineated their characteristics. Frequent alterations are observed in the molecules belonging to T-cell receptor/NF-kappa B signaling and other T-cell-related pathways. A notable feature of the ATL genome is the predominance of gain-of-function alterations, including activating mutations in PLCG1, PRKCB, and CARD11. As many as one-fourth of all ATL cases harbor structural variations disrupting the 3'-untranslated region of the PD-L1 gene, leading to immune evasion of tumor cells. The frequency and pattern of these somatic alterations differ among clinical subtypes. Aggressive subtypes are associated with an increased burden of genetic alterations, and higher frequencies of TP53 and IRF4 mutations, PD-L1 amplifications, and CDKN2A deletions than indolent subtypes. In contrast, STAT3 mutations are more characteristic of indolent ATL. Furthermore, these subtypes are further classified into molecularly distinct subsets with a different prognosis by genetic alterations. We present an overview of the current understanding of somatic alterations in ATL, with specific focus on their utility in clinical settings. Furthermore, we highlight their genetic features by exploring their similarities and differences among peripheral T-cell lymphomas.
引用
收藏
页码:66 / 72
页数:7
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