Abstract
Long noncoding RNAs (lncRNAs) play a key role in human cancer development; nevertheless, the effect of lncRNA LINC00665 on the progression of gastric cancer (GC) still unclear. In this study, we found that LINC00665 expression is upregulated in GC than normal gastric mucosa tissues and higher LINC00665 expression is associated with a poor prognosis in GC patients. Downregulated LINC00665 inhibited GC cells proliferation, invasion, and migration in vitro. Pulmonary metastasis animal models showed that downregulated LINC00665 could reduce the lung metastasis of GC in vivo. Tumor organoids were generated from human malignant GC tissues, downregulated LINC00665 could inhibit the growth of the organoids of GC tissues. Mechanistically, downregulated LINC00665 could inhibit GC cells EMT. RNA pulldown, RIP, and RIP-seq studies found that LINC00665 can bind to the transcription factor YBX1 and form a positive feed-forward loop. The luciferase reporter and CHIP results showed that YBX1 could regulate the transcriptional activity of Wnt3a, and downregulation of LINC00665 could block the activation of Wnt/β-catenin signaling. In conclusion, our results identified a feedback loop between LINC00665 and YBX1 that activates Wnt/β-catenin signaling, and it may be a potential therapeutic approach to suppress GC progression.
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Data availability
All data generated or analyzed during this study are included in this published article and its supplementary information files. The datasets are also available from the corresponding author on reasonable request.
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Acknowledgements
We acknowledge the GEO and TCGA databases, Kaplan–Meier Plotter database for providing their platforms and contributors for uploading their meaningful datasets.
Funding
This work was supported by the National Nature Science Foundation of China (81973625), the foundation of National Key Research and Development Program of China (2019YFC1316000), the foundation of Shanghai key medical specialty construction project (ZK2019B18), the foundation of within the budget of Shanghai University of Traditional Chinese Medicine (2019LK037), and the foundation of clinical specialized disease Construction Project of Shanghai Putuo District Municipal Health Comission (2019tszb01).
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TC and CC conceived or designed the experiments; JW, DXS, and CSL performed the experiments and write the manuscript; QYL performed part of the animal experiments; JHL, DHT, and YJF performed part of the cell and molecular and biology experiments; QSZ and PHY performed part of the clinical patients collect and data analysis. All authors read and approved the final manuscript.
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Human samples used in this study was obtained with informed consent and was approved by the Ethics Committee of Putuo Hospital, Shanghai University of Traditional Chinese Medicine (PTEC-A-2020-5(S)-1). All the animal studies were performed strictly in accordance with the Animal Care Guidelines approved by the Animal Care Committee of East China Normal University.
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Wang, J., Shen, D., Li, S. et al. LINC00665 activating Wnt3a/β-catenin signaling by bond with YBX1 promotes gastric cancer proliferation and metastasis. Cancer Gene Ther 30, 1530–1542 (2023). https://doi.org/10.1038/s41417-023-00657-4
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DOI: https://doi.org/10.1038/s41417-023-00657-4