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Stage IV colon cancer patients without DENND2D expression benefit more from neoadjuvant chemotherapyMa, Wen-Juan; Chen, Yukun; Peng, Jian-Hong; Tang, Chaoming; Zhang, Ling; Liu, Min; Hu, Shanshan; Xu, Haineng; Tan, Hua; Gu, Yangkui; Pan, Zhi-Zhong; Chen, Gong; Zhou, Zhong-Guo; Zhang, Rong-Xin
Cell death & disease, 05/2022, Volume: 13, Issue: 5Journal Article
According to the EPOC study, chemotherapy could improve 5-year disease-free survival of stage IV colon cancer patients by 8.1%. However, more molecular biomarkers are required to identify patients who need neoadjuvant chemotherapy. DENND2D expression was evaluated by immunohistochemistry in 181 stage IV colon cancer patients. The prognosis was better for patients with DENND2D expression than patients without DENND2D expression (5-year overall survival OS: 42% vs. 12%, p = 0.038; 5-year disease-free survival: 20% vs. 10%, p = 0.001). Subgroup analysis of the DENND2D-negative group showed that patients treated with neoadjuvant chemotherapy achieved longer OS than patients without neoadjuvant chemotherapy (RR = 0.179; 95% CI = 0.054-0.598; p = 0.003). DENND2D suppressed CRC proliferation in vitro and in vivo. Downregulation of DENND2D also promoted metastasis to distant organs in vivo. Mechanistically, DENND2D suppressed the MAPK pathway in CRC. Colon cancer patients who were DENND2D negative always showed a worse prognosis and were more likely to benefit from neoadjuvant chemotherapy. DENND2D may be a new prognostic factor and a predictor of the need for neoadjuvant chemotherapy in stage IV colon cancer.
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