Abstract
Thyroid carcinoma (THCA) is the most common endocrine malignancy, and its incidence is increasing worldwide. Several studies have explored whether the tumor immune microenvironment and immune-related genes (IRGs) influence the prognosis of patients with THCA and can be used to predict the response to immune checkpoint inhibitors (ICIs). We developed an IRG prognostic/risk signature using a bioinformatics method, and its predictive capacity was validated in patients in the test set and the total set. Subsequently, we analyzed the correlation between this IRG prognostic signature and tumor-infiltrating immune cells, tumor mutation burden (TMB), and immune checkpoint protein expression in patients with THCA. With a multivariate analysis, the IRG prognostic signature, which comprised eight IRGs, was identified as an independent prognostic factor. High-risk patients had poor overall survival compared with low-risk patients. Plasma cells, monocytes, and dendritic cells infiltrated differently according to the IRG prognostic signature. The low-risk group had a higher TMB and immunophenoscore (IPS), which indicated a better response to ICIs. The qRT-PCR validated eight IRGs with differential expression in thyroid cancer and normal tissues. We conclude that the IRG prognostic signature may be a useful tool to predict survival and response to ICIs. However, further testing is required to assess the predictive capacity of this IRG prognostic signature.
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Data availability
Gene expression profiles, clinical information, and mutation data of THCA in this study are available from the public database (TCGA, https://portal.gdc.cancer.gov/). The IPS values are downloaded from The Cancer Immunome Atlas (TCIA, https://tcia.at/home). The immune- related genes are acquired from the Immunology Database and Analysis Portal database (ImmPort, https://immport.niaid.nih.gov).
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We appreciate the linguistic assistance provided by TopEdit (www.topeditsci.com) during the preparation of this manuscript.
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This work was supported by the National Natural Science Foundation of China (81902726), China Postdoctoral Science Foundation (2018M641739).
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WP performed the data analysis and wrote the manuscript. SW and ZH reviewed and revised the manuscript. All authors read and approved the final manuscript.
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The research was approved by the Institutional Research Ethics Committees of the First Affiliated Hospital of China Medical University. Informed consent for publication was obtained from all patients for collection of tissue samples prior to the surgery.
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Wu, P., Sun, W. & Zhang, H. An immune-related prognostic signature for thyroid carcinoma to predict survival and response to immune checkpoint inhibitors. Cancer Immunol Immunother 71, 747–759 (2022). https://doi.org/10.1007/s00262-021-03020-4
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DOI: https://doi.org/10.1007/s00262-021-03020-4