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논문 기본 정보

자료유형
학술저널
저자정보
Yulu Sun (The Fourth People’s Hospital of Jinan China) Guijun Hao (The Fourth People’s Hospital of Jinan China) Mengqi Zhuang (The Fourth People’s Hospital of Jinan China) Huijuan Lv (The Third Affiliated Hospital of Shandong First Medical University China) Chunhong Liu (The Fourth People’s Hospital of Jinan China) Keli Su (The Fourth People’s Hospital of Jinan China)
저널정보
연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제63권 제3호
발행연도
2022.3
수록면
229 - 240 (12page)
DOI
10.3349/ymj.2022.63.3.229

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Purpose: Long non-coding RNAs (lncRNAs) may act as oncogenes in small-cell lung cancer (SCLC). Exosomes containing lncRNAsreleased from cancer-associated fibroblasts (CAF) accelerate tumorigenesis and confer chemoresistance. This studyaimed to explore the action mechanism of the CAF-derived lncRNA maternally expressed gene 3 (MEG3) on cisplatin (DDP) chemoresistanceand cell processes in SCLC. Materials and Methods: Quantitative real-time PCR was conducted to determine the expression levels of MEG3, miR-15a-5p, andCCNE1. Cell viability and metastasis were measured by 3-(4, 5-dimethyl-2-thiazolyl)-2, 5-diphenyl-2-h-tetrazolium bromide andinvasion assays, respectively. A xenograft tumor model was developed to confirm the effect of MEG3 overexpression on SCLC progressionin vivo. Relationships between miR-15a-5p and MEG3/CCNE1 were predicted using StarBase software and validated bydual luciferase reporter assay. Western blotting was used to determine protein levels. A co-culture model was established to explorethe effects of exosomes on MEG3 expression in SCLC cell lines. Results: MEG3 was overexpressed in SCLC tissues and cells. MEG3 silencing significantly repressed cell viability and metastasis inSCLC. High expression of MEG3 was observed in CAF-derived conditioned medium (CM) and exosomes, and promoted chemoresistanceand cancer progression. Additionally, MEG3 was found to serve as a sponge of miR-15a-5p to mediate CCNE1 expression. Overexpression of miR-15a-5p and knockout of CCNE1 reversed the effects of MEG3 overexpression on cell viability and metastasis. Conclusion: MEG3 lncRNA released from CAF-derived exosomes promotes DDP chemoresistance via regulation of a miR-15a-5p/CCNE1 axis. These findings may provide insight into SCLC therapy.

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