RNF43 p.G659fs 通过 PI3K/AKT/mTOR 信号通路和 HLA-E 上调导致 MSI-high 结直肠癌中 NK 细胞功能障碍
RNF43 p.G659fs leads to natural killer cell dysfunction in MSI-high colorectal cancer through PI3K/AKT/mTOR signaling and HLA-E up-regulation.
CELL INTELLIGENCE · 肿瘤细胞治疗研究
肿瘤细胞治疗研究
英文原题:Molecular Characterization of Polyomavirus-Positive and Negative Merkel Cell Carcinoma.
Molecular Characterization of Polyomavirus-Positive and Negative Merkel Cell Carcinoma.
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MCC 的肿瘤发生和治疗反应超越了病毒状态。虽然突变分析证实了先前的发现,但对转录组和肿瘤微环境的评估提示了替代治疗靶点。
免疫检查点抑制剂(ICIs)是晚期 Merkel 细胞癌(MCC)的一线治疗,无论病毒状态如何。一线 ICIs 仅对一半患者提供持久获益,凸显了对替代疗法的需求。在本研究中,目标在于利用全外显子组测序(WES)和转录组测序(WTS)来区分与 ICI 应答相关的基因组改变。研究病毒阳性(VP)与病毒阴性(VN)-MCC 之间的差异基因组改变,以识别新的治疗靶点。
共95例MCC病例接受了WES和WTS。利用应用于WES的计算流程,我们确定了病毒状态和肿瘤突变负荷(TMB)。RNA-seq数据用于表征免疫微环境。
在95例MCC病例中,57例(60%)为VP-MCC,38例(40%)为VN-MCC。VN-MCC的中位TMB更高(27.5 vs. 1 Muts/Mb)。TP53、RB1、NOTCH1、KMTD2、KMT2C和PIK3CA突变主要见于VN-MCC。VN-MCC肿瘤中MAPK Pathway Activity Score、NK细胞浸润和免疫检查点基因CD276上调。VP-MCC与VN-MCC之间未发现OS差异,即使在接受ICIs后也是如此。
A total of 95 MCC cases underwent WES and WTS. Utilizing computational pipelines applied to WES, we identified viral status and tumor mutational burden (TMB). RNA-seq data was used to characterize the immune microenvironment.
Of 95 MCC cases, 57 (60%) were VP-MCC and 38 (40%) were VN-MCC. Median TMB was higher in VN-MCC (27.5 vs. 1 Muts/Mb). Mutations in TP53 , RB1 , NOTCH1 , KMTD2 , KMT2C , and PIK3CA were primarily found in VN-MCC. MAPK Pathway Activity Score, NK cell infiltration, and the immune checkpoint gene CD276 in VN-MCC tumors were upregulated. No overall survival (OS) difference was identified between VP and VN-MCC, even after ICIs.
MCC oncogenesis and treatment response transcend viral status. While mutational analysis confirms previous findings, assessment of the transcriptome and tumor microenvironment suggests alternate therapeutic targets.
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