期刊
ONCOTARGET
卷 6, 期 28, 页码 26079-26089出版社
IMPACT JOURNALS LLC
DOI: 10.18632/oncotarget.4581
关键词
esophageal squamous cell carcinoma (ESCC); EIF5A2; stemness; chemoresistance
资金
- National Natural Science Foundation of China [81472255, 81172338, 81472250, 81225018]
- Sun Yat-sen University Hundred Talents Program [85000-3171311]
- Young Talent Teachers Plan of SYSU [13ykzd26]
- Natural Science Foundation of Guangdong Province [2014A030313071]
- GDDESTIP [2013KJCX0001]
Esophageal squamous cell carcinoma (ESCC) is one of the most lethal malignancies of the digestive tract in East Asian countries. Multimodal therapies, including adjuvant chemotherapy and neo-adjuvant chemotherapy, have become more often used for patients with advanced ESCC. However, the chemotherapy effect is often limited by patients' drug resistance. This study demonstrated that EIF5A2 (eukaryotic translation initiation factor 5A2) overexpression induced stemness and chemoresistance in ESCC cells. We showed that EIF5A2 overexpression in ESCC cells resulted in increased chemoresistance to 5-fluorouracil (5-FU), docetaxel and taxol. In contrast, shRNAs suppressing eIF5A2 increased tumor sensitivity to these chemotherapeutic drugs. In addition, EIF5A2 overexpression was correlated with a poorer overall survival in patients with ESCC who underwent taxane-based chemotherapy after esophagectomy (P < 0.05). Based on these results, we suggest that EIF5A2 could be a predictive biomarker for selecting appropriate chemo-treatment for ESCC patients and EIF5A2 inhibitors might be considered as combination therapy to enhance chemosensitivity in patients with ESCC.
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