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논문 기본 정보

자료유형
학술저널
저자정보
이상길 (연세대학교) 서승인 (한림대학교) 윤정호 (연세대학교) 변효주 (연세대학교)
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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제62권 제2호
발행연도
2021.1
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118 - 128 (11page)

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Purpose: HOX transcript antisense intergenic RNA (HOTAIR), as a long non-coding RNA, has been reported to regulate carcinogenesisby epigenetic mechanism in various cancers. Protocadherin 10 (PCDH10) is one of the well-known tumor suppressor genes,and is frequently methylated in gastric cancers (GC). We aimed to investigate the detailed pathway of how HOTAIR contributes tothe target gene in gastric carcinogenesis. Materials and Methods: We investigated the mechanism of HOTAIR on carcinogenesis and metastasis of GC. Methylation-specificPCR was performed to identify the interaction between HOTAIR and PCDH10. In addition, we investigated the interactionbetween miR-148b and HOTAIR by dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay. Results: The expression of HOTAIR was significantly upregulated in GC tissues (p<0.05) and GC cell lines (p<0.01), while PCDH10was downregulated in GC tissues (p<0.05). The knockdown of HOTAIR (si-HOTAIR1 and 2) significantly upregulated the mRNA/protein expression of PCDH10 and reduced the methylation of PCDH10 compared to the control in MKN 28 and MKN 74. Si-HOTAIR1 and 2 significantly reduced DNA methyltransferase 1 (DNMT1) expression, and overexpression of HOTAIR increasedDNMT1 expression. In RIP, we found that miR-148b interacted with HOTAIR. Si-HOTAIRs increased miR-148b expression, andmiR-148b mimic inversely reduced HOTAIR expression. Si-HOTAIRs and miR-148b mimic reduced DNMT1 expression and increasedPCDH10 expression compared to the control. Conclusion: This study demonstrated that HOTAIR interacts with miR-148b and DNMT1, eventually leading to PCDH10 methylation,which contributes to the progression of GC. Our findings provide a better understanding for detailed pathway of HOTAIR inepigenetic mechanism of GC.

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