Cross-species genomics identifies DLG2 as a tumor suppressor in osteosarcoma.

Cross-species genomics identifies DLG2 as a tumor suppressor in osteosarcoma.
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跨物种基因组学鉴定 DLG2 作为骨肉瘤的肿瘤抑制因子

DOI:
10.1038/s41388-018-0444-4
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发表时间:
2019-01
期刊:
影响因子:
8
通讯作者:
Khokha R
Khokha R
中科院分区:
医学1区
文献类型:
--
作者:
Shao YW;Wood GA;Lu J;Tang QL;Liu J;Molyneux S;Chen Y;Fang H;Adissu H;McKee T;Waterhouse P;Khokha R

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利用哺乳动物中保守的癌症基因组有可能改变孤儿癌症中驱动基因的发现。在这里,我们将联合收割机跨物种基因组学与跨人-狗-鼠系统的验证相结合,以发现一个新的骨肿瘤抑制基因。自发性人和狗骨肉瘤(OS)的比较基因组学暴露了DLG 2作为肿瘤抑制候选者。DLG 2拷贝数丢失发生在42%的人和56%的犬OS中。通过相关的人和犬OS DLG 2缺陷细胞系进行的功能验证鉴定了DLG 2在细胞分裂、迁移和肿瘤发生中的调节作用。此外,在临床相关的基因工程小鼠模型中,成骨细胞特异性缺失Dlg 2导致OS发育加速,将DLG 2确立为OS的关键决定因素。这种广泛适用的跨物种方法可作为一个平台,加快在罕见的人类恶性肿瘤中寻找癌症驱动因素,为癌症治疗提供新的靶点。
Leveraging the conserved cancer genomes across mammals has the potential to transform driver gene discovery in orphan cancers. Here, we combine cross-species genomics with validation across human–dog–mouse systems to uncover a new bone tumor suppressor gene. Comparative genomics of spontaneous human and dog osteosarcomas (OS) expose Disks Large Homolog 2 (DLG2) as a tumor suppressor candidate. DLG2 copy number loss occurs in 42% of human and 56% of canine OS. Functional validation through pertinent human and canine OS DLG2-deficient cell lines identifies a regulatory role of DLG2 in cell division, migration and tumorigenesis. Moreover, osteoblast-specific deletion of Dlg2 in a clinically relevant genetically engineered mouse model leads to acceleration of OS development, establishing DLG2 as a critical determinant of OS. This widely applicable cross-species approach serves as a platform to expedite the search of cancer drivers in rare human malignancies, offering new targets for cancer therapy.
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