| 论文题目: | Cyst(e)ine in Nutrition Formulation Promotes Colon Cancer Growth and Chemoresistance by Activating mTORC1 and Scavenging ROS |
| 作者: | Jiao Wu, Sai-Ching Jim Yeung, Sicheng Liu, Aiham Qdaisat, Dewei Jiang, Wenli Liu, Zhuo Cheng, Wenjing Liu, Haixia Wang, Lu Li, Zhongmei Zhou, Rong Liu, Chuanyu Yang, Ceshi Chen, Runxiang Yang |
| 联系作者: | chenc@mail.kiz.ac.cn;yrx_research@163.com |
| 发表年度: | 2021 |
| DOI: | doi: 10.1038/s41392-021-00581-9 |
| 摘要: | Weight loss and cachexia are common problems in colorectal cancer patients; thus, parenteral and enteral nutrition support play important roles in cancer care. However, the impact of nonessential amino acid components of nutritional intake on cancer progression has not been fully studied. In this study, we discovered that gastrointestinal cancer patients who received cysteine as part of the parenteral nutrition had shorter overall survival (P < 0.001) than those who did not. Cystine indeed robustly promotes colon cancer cell growth in vitro and in immunodeficient mice, predominately by inhibiting SESN2 transcription via the GCN2-ATF4 axis, resulting in mTORC1 activation. mTORC1 inhibitors Rapamycin and Everolimus block cystine-induced cancer cell proliferation. In addition, cystine confers resistance to oxaliplatin and irinotecan chemotherapy by quenching chemotherapy-induced reactive oxygen species via synthesizing glutathione. We demonstrated that dietary deprivation of cystine suppressed colon cancer xenograft growth without weight loss in mice and boosted the antitumor effect of oxaliplatin. These findings indicate that cyst(e)ine, as part of supplemental nutrition, plays an important role in colorectal cancer and manipulation of cyst(e)ine content in nutritional formulations may optimize colorectal cancer patient survival |
| 刊物名称: | Signal Transduction and Targeted Therapy |
| 论文出处: | https://www.nature.com/articles/s41392-021-00581-9.pdf |
| 影响因子: | 13.493(2019年) |
