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논문 기본 정보

자료유형
학술저널
저자정보
변효주 (연세대학교) 윤정호 (연세대학교) 이상길 (연세대학교)
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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제61권 제11호
발행연도
2020.1
수록면
923 - 934 (12page)

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Purpose: The mechanisms of Wnt/β-catenin pathway signaling and abnormal expression of tumor suppressor genes is not wellknown in gastric cancer (GC). Long non-coding RNA (lncRNA) has recently been identified as a possible link therein. In thisstudy, we investigated the role of lung cancer associated transcript 1 (LUCAT1) in GC. Materials and Methods: The expression of LUCAT1 in GC cell lines and 100 tissue samples was examined by qRT-PCR. Two differentsiRNAs were used for knockdown of LUCAT1 expression. Cell viability was assessed by MTT assay. To analyze metastasis,scratch wound-healing assay, a Matrigel invasion assay, and colony formation assay were performed. Apoptosis was analyzed byPI/Annexin-V staining. To check the methylation status in tumor suppressor genes, methylation-specific PCR was carried out. Western blot was performed to detect epithelial-mesenchymal transition and apoptosis markers upon silencing of LUCAT1 (siLUCAT1). Results: LUCAT1 expression in GC cell lines and tissues was significantly elevated, compared to that in normal gastric cells andadjacent non-tumor tissues (p<0.001). Two different siRNAs for LUCAT1 reduced cell proliferation, invasion, and migration,compared to siCT (p<0.05), and these reductions were restored by pcDNA-LUCAT1 (p<0.05). siLUCAT1 elicited upregulation ofthe expression of CXXC4 and SFRP2. The expression of H3K27me3 was reduced by siLUCAT1, and this reduction was correlatedwith methylation of CXXC4 and SFRP2. Inhibition of LUCAT1 up-regulated EZH2 expression and resulted in demethylation ofCXXC4 and SFRP2 through the Wnt/β-catenin signaling pathway. Conclusion: We concluded that LUCAT1 induces methylation of CXXC4 and SFRP2, thereby regulating Wnt/β-catenin signalingin GC.

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