AUTHOR=Chu Yanpeng , Li Jie , Zeng Zhaoping , Huang Bin , Zhao Jiaojiao , Liu Qin , Wu Huaping , Fu Jiangping , Zhang Yin , Zhang Yefan , Cai Jianqiang , Zeng Fanxin 

TITLE=A Novel Model Based on CXCL8-Derived Radiomics for Prognosis Prediction in Colorectal Cancer

JOURNAL=Frontiers in Oncology

VOLUME=10

YEAR=2020

URL=https://www.frontiersin.org/journals/oncology/articles/10.3389/fonc.2020.575422

DOI=10.3389/fonc.2020.575422

ISSN=2234-943X

ABSTRACT=<p><bold>Introduction:</bold> Prognosis prediction is essential to improve therapeutic strategies and to achieve better clinical outcomes in colorectal cancer (CRC) patients. Radiomics based on high-throughput mining of quantitative medical imaging is an emerging field in recent years. However, the relationship among prognosis, radiomics features, and gene expression remains unknown.</p><p><bold>Methods:</bold> We retrospectively analyzed 141 patients (from study 1) diagnosed with CRC from February 2018 to October 2019 and randomly divided them into training (<italic>N</italic> = 99) and testing (<italic>N</italic> = 42) cohorts. Radiomics features in venous phase image were extracted from preoperative computed tomography (CT) images. Gene expression was detected by RNA-sequencing on tumor tissues. The least absolute shrinkage and selection operator (LASSO) regression model was used for selecting imaging features and building the radiomics model. A total of 45 CRC patients (study 2) with immunohistochemical (IHC) staining of <italic>CXCL8</italic> diagnosed with CRC from January 2014 to October 2018 were included in the independent testing cohort. A clinical model was validated for prognosis prediction in prognostic testing cohort (163 CRC patients from 2014 to 2018, study 3). We performed a combined radiomics model that was composed of radiomics score, tumor stage, and <italic>CXCL8</italic>-derived radiomics model to make comparison with the clinical model.</p><p><bold>Results:</bold> In our study, we identified the <italic>CXCL8</italic> as a hub gene in affecting prognosis, which is mainly through regulating cytokine–cytokine receptor interaction and neutrophil migration pathway. The radiomics model incorporated 12 radiomics features screened by LASSO according to <italic>CXCL8</italic> expression in the training cohort and showed good performance in testing and IHC testing cohorts. Finally, the <italic>CXCL8</italic>-derived radiomics model combined with tumor stage performed high ability in predicting the prognosis of CRC patients in the prognostic testing cohort, with an area under the curve (AUC) of 0.774 [95% confidence interval (CI): 0.674–0.874]. Kaplan–Meier analysis of the overall survival probability in CRC patients stratified by combined model revealed that high-risk patients have a poor prognosis compared with low-risk patients (Log-rank <italic>P</italic> &lt; 0.0001).</p><p><bold>Conclusion:</bold> We demonstrated that the radiomics model reflected by <italic>CXCL8</italic> combined with tumor stage information is a reliable approach to predict the prognosis in CRC patients and has a potential ability in assisting clinical decision-making.</p>