Modulator of TMB-associated immune infiltration (MOTIF) predicts immunotherapy response and guides combination therapy

CD8型 免疫疗法 免疫系统 T细胞 渗透(HVAC) 癌症研究 癌症免疫疗法 生物 计算生物学 免疫学 材料科学 复合材料
作者
Z. Qian,Yi‐Qian Pan,Xuexin Li,Yan‐Xing Chen,Hao‐Xiang Wu,Zexian Liu,Martin Košař,Jiří Bártek,Zi‐Xian Wang,Rui‐Hua Xu
出处
期刊:Science Bulletin [Elsevier]
标识
DOI:10.1016/j.scib.2024.01.025
摘要

Patients with high tumor mutational burden (TMB) levels do not consistently respond to immune checkpoint inhibitors (ICIs), possibly because a high TMB level does not necessarily result in adequate infiltration of CD8+ T cells. Using bulk ribonucleic acid sequencing (RNA-seq) data from 9311 tumor samples across 30 cancer types, we developed a novel tool called the modulator of TMB-associated immune infiltration (MOTIF), which comprises genes that can determine the extent of CD8+ T cell infiltration prompted by a certain TMB level. We confirmed that MOTIF can accurately reflect the integrity and defects of the cancer-immunity cycle. By analyzing 84 human single-cell RNA-seq datasets from 32 types of solid tumors, we revealed that MOTIF can provide insights into the diverse roles of various cell types in the modulation of CD8+ T cell infiltration. Using pretreatment RNA-seq data from 13 ICI-treated cohorts, we validated the use of MOTIF in predicting CD8+ T cell infiltration and ICI efficacy. Among the components of MOTIF, we identified EMC3 as a negative regulator of CD8+ T cell infiltration, which was validated via in vivo studies. Additionally, MOTIF provided guidance for the potential combinations of programmed death 1 blockade with certain immunostimulatory drugs to facilitate CD8+ T cell infiltration and improve ICI efficacy.
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