A functional microRNA library screen reveals miR-410 as a novel anti-apoptotic regulator of cholangiocarcinoma

Palumbo, T., Poultsides, G.A., Kouraklis, G., Liakakos, T., Drakaki, A., Peros, G., Hatziapostolou, M. ORCID: 0000-0003-2493-7028 and Iliopoulos, D., 2016. A functional microRNA library screen reveals miR-410 as a novel anti-apoptotic regulator of cholangiocarcinoma. BMC Cancer, 16 (1): 353. ISSN 1471-2407

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Abstract

Background: Cholangiocarcinoma is characterized by late diagnosis and a poor survival rate. MicroRNAs have been involved in the pathogenesis of different cancer types, including cholangiocarcinoma. Our aim was to identify novel microRNAs regulating cholangiocarcinoma cell growth in vitro and in vivo.

Methods: A functional microRNA library screen was performed in human cholangiocarcinoma cells to identify microRNAs that regulate cholangiocarcinoma cell growth. Real-time PCR analysis evaluated miR-9 and XIAP mRNA levels in cholangiocarcinoma cells and tumors.

Results: The screen identified 21 microRNAs that regulated >50 % cholangiocarcinoma cell growth. MiR-410 was identified as the top suppressor of growth, while its overexpression significantly inhibited the invasion and colony formation ability of cholangiocarcinoma cells. Bioinformatics analysis revealed that microRNA-410 exerts its effects through the direct regulation of the X-linked inhibitor of apoptosis protein (XIAP). Furthermore, overexpression of miR-410 significantly reduced cholangiocarcinoma tumor growth in a xenograft mouse model through induction of apoptosis. In addition, we identified an inverse relationship between miR-410 and XIAP mRNA levels in human cholangiocarcinomas.

Conclusions: Taken together, our study revealed a novel microRNA signaling pathway involved in cholangiocarcinoma and suggests that manipulation of the miR-410/XIAP pathway could have a therapeutic potential for cholangiocarcinoma.

Item Type: Journal article
Publication Title: BMC Cancer
Creators: Palumbo, T., Poultsides, G.A., Kouraklis, G., Liakakos, T., Drakaki, A., Peros, G., Hatziapostolou, M. and Iliopoulos, D.
Publisher: BioMed Central
Date: 2016
Volume: 16
Number: 1
ISSN: 1471-2407
Identifiers:
NumberType
10.1186/s12885-016-2384-0DOI
2384Publisher Item Identifier
Divisions: Schools > School of Science and Technology
Depositing User: Linda Sullivan
Date Added: 05 Jun 2018 08:40
Last Modified: 05 Jun 2018 08:40
URI: http://irep.ntu.ac.uk/id/eprint/33815

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