期刊
ONCOGENE
卷 40, 期 43, 页码 6180-6194出版社
SPRINGERNATURE
DOI: 10.1038/s41388-021-02011-0
关键词
-
资金
- National Natural Science Foundation of China [81871946, 82002558, 82072708]
- Special Foundation for National Science and Technology Basic Research Program of China [2019FY101104]
- Primary Research & Development Plan of Jiangsu Province [BE2016786]
- Program for Development of Innovative Research Team in the First Affiliated Hospital of NJMU
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) [JX10231801]
- Jiangsu Key Medical Discipline (General Surgery) [ZDXKA2016005]
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University
This study found that gastric cancer-derived sEVs are primarily absorbed by Kupffer cells, leading to high expression of sEV-miR-151a-3p in GC-LM patients with poor prognosis. These sEV-miR-151a-3p activate the SMAD2/3 pathway by inhibiting SP3 and targeting YTHDF3 in Kupffer cells, promoting liver metastasis of gastric cancer cells and enhancing stem cell-like properties. Additionally, sEV-miR-151a-3p induces miR-151a-3p transcription in Kupffer cells, forming a positive feedback loop to establish a hepatic stemness-permissive niche to support GC-LM.
Liver metastasis (LM) severely affects gastric cancer (GC) patients' prognosis. Small extracellular vesicles (sEVs) play key roles in intercellular communication. Specific sEV-miRNAs from several types of cancer were found to induce a premetastatic niche in target organs before tumor cell arrive. However, whether the primary GC affects hepatic microenvironment or the role of sEV-miRNAs in GC-LM is yet unclear. We report that GC-derived sEVs are primarily absorbed by Kupffer cells (KCs). sEV-miR-151a-3p is highly expressed in GC-LM patients' plasma and presents poor prognosis. Treating mice with sEVs-enriched in miR-151a-3p promotes GC-LM, whereas has no influence on the proliferation of GC cells in situ. Mechanistically, sEV-miR-151a-3p inhibits SP3 in KCs. Simultaneously, sEV-miR-151a-3p targets YTHDF3 to decrease the transcriptional inhibitory activity of SP3 by reducing SUMO1 translation in a N6-methyladenosine-dependent manner. These factors contribute to TGF-beta 1 transactivation in KCs, subsequently activating the SMAD2/3 pathway and enhancing the stem cell-like properties of incoming GC cells. Furthermore, sEV-miR-151a-3p induces miR-151a-3p transcription in KCs to form a positive feedback loop. In summary, our results reveal a previously unidentified regulatory axis initiated by sEV-miR-151a-3p that establishes a hepatic stemness-permissive niche to support GC-LM. sEV-miR-151a-3p could be a promising diagnostic biomarker and preventive treatment candidate for GC-LM.
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