ENI可消除对联合放疗和免疫治疗的免疫反应。有或没有选择性淋巴结照射(ENI)的肿瘤照射实验设计示意图。在种植后第0天(DPI)分别在小鼠的颊部和侧翼进行种植。当肿瘤达到150mm3时给予立体定向体照射(SBRT),并在SBRT前一天给予抗cd25。由BioRender.com创建。B肿瘤生长曲线,来自(A)中所描述的实验,使用抗cd25 (n = 5)、抗cd25和仅使用肿瘤SBRT (n = 7)、抗cd25和ENI (n = 7)以及仅使用肿瘤SBRT (n = 5)的小鼠的颊部肿瘤(上)和侧翼肿瘤生长曲线(下)。C小鼠植入P029细胞株后的颊部肿瘤生长曲线(每组n = 10)。在种植后第0天(DPI)将小鼠植入口腔。当肿瘤达到150mm3时给予SBRT,在SBRT前一天给予抗cd25,之后每周给予1次。SBRT的剂量间隔4-5天。 D Quantification of the percentage of mice with P029 tumors that had radiographically detectable lung metastases at days 41 (ENI, n = 10; tumor only, n = 7) and 47 (ENI, n = 9; tumor only, n = 7) post-tumor cell implantation. Lung metastases were evaluated by microCT images. E A representative microCT image of a lung metastasis identified in a mouse treated with ENI in the P029 model. A metastasis is highlighted with a white circle. F Flow cytometry analysis of blood taken from mice at day 24 DPI in the experiment depicted in (A) (ENI, n = 4; tumor only, n = 4). CD8 T cells were defined as CD45+CD3+CD8+ and CD4 T cells were defined as CD45+CD3+CD4+. For tumor growth at different time points, 3 or more groups differences were determined by a One-Way ANOVA test with Tukey's post hoc comparisons, with only 2 groups a Two-Way ANOVA was used. To test if there is a difference between tumor only SBRT and ENI treatment groups in reducing the number of mice that grew flank tumors, we used a Fischer's Exact test. For the flow cytometry analysis, a two-tailed student's t-test was used. Significance was determined if the p-value was <0.05* and <0.01**. The error bars represent the standard error of the mean (± SEM). Source data are provided as a Source Data file. p-values are indicated for figures B. buccal tumor only **0.0035, buccal ENI **0.0032, *0.0278, (C) *0.0371, and (F) CD69 *0.0222, IL-2 *0.0284, CCR7 *0.0366. Credit:自然通讯(2022)。DOI: 10.1038 / s41467 - 022 - 34676 - w