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자료유형
학술저널
저자정보
김현아 (강원대학교) 정두일 (강원대학교) 김영미 (강원대학교) 고현정 (강원대학교)
저널정보
한국분자세포생물학회 Molecules and Cells Molecules and Cells 제39권 제3호
발행연도
2016.3
수록면
229 - 241 (13page)

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We have previously reported the role of miR-326-HDAC3 loop in anti-cancer drug-resistance. CAGE, a cancer/testis antigen, regulates the response to anti-cancer drug-resistance by forming a negative feedback loop with miR-200b. Studies investigating the rela-tionship between CAGE and HDAC3 revealed that HDAC3 negatively regulated the expression of CAGE. ChIP assays demonstrated the binding of HDAC3 to the promoter sequences of CAGE. However, CAGE did not affect the expression of HDAC3. We also found that EGFR signaling regulated the expressions of HDAC3 and CAGE. Anti-cancer drug-resistant cancer cell lines show an increased expression of pEGFRY845. HDAC3 was found to negatively regulate the expression of pEGFRY845. CAGE showed an interaction and co-localization with EGFR. It was seen that miR-326, a negative regulator of HDAC3, regulated the expression of CAGE, pEGFRY845, and the interaction between CAGE and EGFR. miR-326 inhibitor induced the binding of HDAC3 to the promoter sequences in anti-cancer drug-resistant Malme3MR cells, decreasing the tumorigenic potential of Malme3MR cells in a manner associated with its effect on the expression of HDAC3, CAGE and pEGFRY845. The down-regulation of HDAC3 enhanced the tumorigenic, angiogenic and invasion potential of the anti-cancer drug-sensitive Malme3M cells in CAGE-dependent manner. Studies re-vealed that PKC? was responsible for the increased ex-pression of pEGFRY845 and CAGE in Malme3MR cells. CAGE showed an interaction with PKC? in Malme3MR cells. Our results show that HDAC3-CAGE axis can be employed as a target for overcoming resistance to EGFR inhibitors.

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