PMID- 37185675 OWN - NLM STAT- MEDLINE DCOM- 20230626 LR - 20231124 IS - 1460-2180 (Electronic) IS - 0143-3334 (Linking) VI - 44 IP - 4 DP - 2023 Jun 24 TI - MCM6 promotes intrahepatic cholangiocarcinoma progression by upregulating E2F1 and enhancing epithelial-mesenchymal transition. PG - 279-290 LID - 10.1093/carcin/bgad023 [doi] AB - Minichromosome maintenance complex component 6 (MCM6), a member of the MCM family, plays a pivotal role in DNA replication initiation and genome duplication of proliferating cells. MCM6 is upregulated in multiple malignancies and is considered a novel diagnostic biomarker. However, the functional contributions and prognostic value of MCM6 in intrahepatic cholangiocarcinoma (ICC) remain unexplored. In this study, we investigated the molecular function of MCM6 in ICC. Data from The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO, GSE107943) indicated an upregulation of MCM6 in tumor tissues. Immunohistochemical analysis performed on 115 cases of ICC samples confirmed the upregulation of MCM6 and further suggested that a high level of MCM6 expression predicted shorter overall and disease-free survival in ICC patients. Functional studies suggested that MCM6 knockdown significantly suppressed cell viability, blocked cell cycle progression and inhibited metastasis, while the enhancement of MCM6 expression promoted the proliferation and migration of ICC cells both in vitro and in vivo. Mechanistically, Gene Set Enrichment Analysis (GSEA) suggested that the epithelial-mesenchymal transition (EMT) and E2F1-correlated genes were enriched in ICC tissues with high MCM6 expression. Further verification indicated that MCM6 promoted the EMT of ICC cells via upregulating E2F1. In addition, E2F1 knockdown partially blocked the pro-malignant effects of MCM6 overexpression. In summary, MCM6 was found to be a novel prognostic and predictive marker for ICC. MCM6 promoted ICC progression via activation of E2F1-mediated EMT. CI - (c) The Author(s) 2023. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com. FAU - Gao, Chongqing AU - Gao C AD - Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong 510630, China. FAU - Li, Jing AU - Li J AD - Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong 510630, China. FAU - Zeng, Fuling AU - Zeng F AD - Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong 510630, China. FAU - Wang, Lijuan AU - Wang L AD - Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong 510630, China. FAU - Chen, Kaiyun AU - Chen K AD - Department of General Surgery, Guangzhou Hospital of Integrated Traditional and West Medicine, Guangzhou, Guangdong 510632, China. FAU - Chen, Dong AU - Chen D AD - Department of Pancreato-Biliary Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510632, China. FAU - Hong, Jian AU - Hong J AD - Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong 510630, China. AD - Department of General Surgery, Guangdong Second Provincial General Hospital, Guangzhou, Guangdong 510317, China. FAU - Qu, Chen AU - Qu C AUID- ORCID: 0000-0002-6539-3197 AD - Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, Guangdong 510630, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Carcinogenesis JT - Carcinogenesis JID - 8008055 RN - EC 3.6.4.12 (Minichromosome Maintenance Complex Component 6) RN - EC 3.6.4.12 (MCM6 protein, human) RN - 0 (E2F1 protein, human) RN - 0 (E2F1 Transcription Factor) SB - IM MH - Humans MH - Minichromosome Maintenance Complex Component 6/genetics/metabolism MH - Epithelial-Mesenchymal Transition/genetics MH - Prognosis MH - *Cholangiocarcinoma/pathology MH - *Bile Duct Neoplasms/pathology MH - Bile Ducts, Intrahepatic/pathology MH - Cell Line, Tumor MH - Cell Proliferation/genetics MH - Gene Expression Regulation, Neoplastic MH - E2F1 Transcription Factor/genetics EDAT- 2023/05/15 19:12 MHDA- 2023/06/26 06:42 CRDT- 2023/05/15 13:45 PHST- 2022/10/24 00:00 [received] PHST- 2022/12/22 00:00 [revised] PHST- 2023/04/21 00:00 [accepted] PHST- 2023/06/26 06:42 [medline] PHST- 2023/05/15 19:12 [pubmed] PHST- 2023/05/15 13:45 [entrez] AID - 7142844 [pii] AID - 10.1093/carcin/bgad023 [doi] PST - ppublish SO - Carcinogenesis. 2023 Jun 24;44(4):279-290. doi: 10.1093/carcin/bgad023.