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Wen Q, Huang M, Xie J, Liu R, Miao Q, Huang J, Zhang J, Lyu W, Qi M, Wu C, Qi Q, Zhang Z, Deng R, Wang C, Chen ZS, Zhang D, Ye W, Chen M. lncRNA SYTL5-OT4 promotes vessel co-option by inhibiting the autophagic degradation of ASCT2. Drug Resist Updat 2023; 69:100975. [PMID: 37207473 DOI: 10.1016/j.drup.2023.100975] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 05/21/2023]
Abstract
AIMS Vessel co-option is responsible for tumor resistance to antiangiogenic therapies (AATs) in patients with colorectal cancer liver metastasis (CRCLM). However, the mechanisms underlying vessel co-option remain largely unknown. Herein, we investigated the roles of a novel lncRNA SYTL5-OT4 and Alanine-Serine-Cysteine Transporter 2 (ASCT2) in vessel co-option-mediated AAT resistance. METHODS SYTL5-OT4 was identified by RNA-sequencing and verified by RT-qPCR and RNA fluorescence in situ hybridization assays. The effects of SYTL5-OT4 and ASCT2 on tumor cells were investigated by gain- and loss-of-function experiments, and those of SYTL5-OT4 on ASCT2 expression were analyzed by RNA immunoprecipitation and co-immunoprecipitation assays. The roles of SYTL5-OT4 and ASCT2 in vessel co-option were detected by histological, immunohistochemical, and immunofluorescence analyses. RESULTS The expression of SYTL5-OT4 and ASCT2 was higher in patients with AAT-resistant CRCLM. SYTL5-OT4 enhanced the expression of ASCT2 by inhibiting its autophagic degradation. SYTL5-OT4 and ASCT2 promoted vessel co-option by increasing the proliferation and epithelial-mesenchymal transition of tumor cells. Combination therapy of ASCT2 inhibitor and antiangiogenic agents overcame vessel co-option-mediated AAT resistance in CRCLM. CONCLUSION This study highlights the crucial roles of lncRNA and glutamine metabolism in vessel co-option and provides a potential therapeutic strategy for patients with AAT-resistant CRCLM.
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Affiliation(s)
- Qing Wen
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Maohua Huang
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Jingwen Xie
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Runyu Liu
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Qun Miao
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Jinjun Huang
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Junqiu Zhang
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Wenyu Lyu
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Ming Qi
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Chunyi Wu
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Qi Qi
- School of Medicine, Jinan University, Guangzhou 510632, China
| | - Zhijing Zhang
- School of Medicine, Jinan University, Guangzhou 510632, China
| | - Rong Deng
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangdong Key Laboratory of Nasopharyngeal Carcinoma Diagnosis and Therapy, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Chenran Wang
- College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Zhe-Sheng Chen
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Institute for Biotechnology, St. John's University, NY 11439, USA.
| | - Dongmei Zhang
- College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, China.
| | - Wencai Ye
- College of Pharmacy, Jinan University, Guangzhou 510632, China; Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research, Jinan University, Guangzhou 510632, China.
| | - Minfeng Chen
- College of Pharmacy, Jinan University, Guangzhou 510632, China.
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