Journal Article

microRNA-141 is involved in a nasopharyngeal carcinoma-related genes network

Liming Zhang, Tan Deng, Xiayu Li, Huaying Liu, Houde Zhou, Jian Ma, Minghua Wu, Ming Zhou, Shourong Shen, Xiaoling Li, Zhaoxia Niu, Wenling Zhang, Lei Shi, Bo Xiang, Jianhong Lu, Li Wang, Dan Li, Hailin Tang and Guiyuan Li

in Carcinogenesis

Volume 31, issue 4, pages 559-566
Published in print April 2010 | ISSN: 0143-3334
Published online January 2010 | e-ISSN: 1460-2180 | DOI: http://dx.doi.org/10.1093/carcin/bgp335
microRNA-141 is involved in a nasopharyngeal carcinoma-related genes network

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microRNAs (miRNAs) are small non-coding RNAs and have been implicated in the pathology of various diseases, including cancer. Here we report that the miRNA profiles have been changed after knockdown of one of the most important oncogene c-MYC or re-expression of a candidate tumor suppressor gene SPLUNC1 in nasopharyngeal carcinoma (NPC) cells. Both c-MYC knockdown and SPLUNC1 re-expression can down-regulate microRNA-141 (miR-141). miR-141 is up-regulated in NPC specimens in comparison with normal nasopharyngeal epithelium. Inhibition of miR-141 could affect cell cycle, apoptosis, cell growth, migration and invasion in NPC cells. We found that BRD3, UBAP1 and PTEN are potential targets of miR-141, which had been confirmed following luciferase reporter assays and western blotting. BRD3 and UBAP1 are both involved in NPC carcinogenesis as confirmed through our previous studies and PTEN is a crucial tumor suppressor in many tumor types. BRD3 is involved in the regulation of the Rb/E2F pathway. Inhibition of miR-141 could affect some important molecules in the Rb/E2F, JNK2 and AKT pathways. It is well known that carcinogenesis of NPC is involved in the networks of genetic and epigenetic alteration events. We propose that miR-141- and tumor-related genes c-MYC, SPLUNC1, BRD3, UBAP1 and PTEN may constitute a gene–miRNA network to contribute to NPC development.

Journal Article.  5782 words.  Illustrated.

Subjects: Clinical Cytogenetics and Molecular Genetics

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