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:Characterization of natural killer and cytotoxic T-cell immune infiltrates in pancreatic ductal adenocarcinoma.
Characterization of natural killer and cytotoxic T-cell immune infiltrates in pancreatic ductal adenocarcinoma.
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PDAC 中 NK 细胞浸润水平较低,且不能预测临床结局,而 T 细胞浸润则可以。进一步表征 PDAC 中的免疫浸润,包括抑制信号和抑制性细胞类型,可能为这种难治性疾病提供更好的预后生物标志物和免疫靶向策略。
胰腺导管腺癌(PDAC)是一种侵袭性癌症,对包括免疫治疗在内的全身治疗反应不佳。鉴于自然杀伤(NK)细胞的免疫治疗潜力,我们评估了PDAC中肿瘤内NK细胞浸润以及细胞毒性T细胞,以确定它们与患者预后的关联。
我们分析了2012年至2020年间接受治疗的93例PDAC患者的肿瘤。预测变量包括通过免疫组织化学检测的TIL(肿瘤浸润淋巴细胞)(TILs)、T细胞标志物(CD3、CD8、CD45RO)、NK标志物(NKp46)和NK抑制性标志物(主要组织相容性复合体I类[MHC-I])。主要结局变量为无复发生存期(RFS)和总生存期(OS)。
平均 TILs、CD3 和 NKp46 评分分别为 1.3 ± 0.63、20.6 ± 17.5 和 3.1 ± 3.9。CD3 和 CD8 的高表达与更高的 OS 相关,而 NK 细胞浸润与 RFS 或 OS 均无关。MHC-I 表达与所有 T 细胞标志物之间呈紧密正相关,但与 NKp46 无关。
We analyzed tumors from 93 PDAC patients treated from 2012 to 2020. Predictor variables included tumor-infiltrating lymphocytes (TILs), T-cell markers (CD3, CD8, CD45RO), NK marker (NKp46), and NK inhibitory marker (major histocompatibility complex class I [MHC-I]) by immunohistochemistry. Primary outcome variables were recurrence-free survival (RFS) and overall survival (OS).
Mean TILs, CD3, and NKp46 scores were 1.3 ± 0.63, 20.6 ± 17.5, and 3.1 ± 3.9, respectively. Higher expression of CD3 and CD8 was associated with higher OS, whereas NK cell infiltration was not associated with either RFS or OS. There was a tight positive correlation between MHC-I expression and all T-cell markers, but not with NKp46.
Overall NK cell infiltrates were low in PDAC and did not predict clinical outcomes, whereas T-cell infiltrates did. Further characterization of the immune infiltrate in PDAC, including inhibitory signals and suppressive cell types, may yield better biomarkers of prognosis and immune targeting in this refractory disease.
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