Abstract:
:The expression of microRNA-375 (miR-375) is significantly reduced in cancer tissues of maxillary sinus squamous cell carcinoma (MSSCC). The aim of this study was to investigate the functional significance of miR-375 and a possible regulatory role in the MSSCC networks. Restoration of miR-375 significantly inhibited cancer cell proliferation and invasion in IMC-3 cells, suggesting that miR-375 functions as a tumor suppressor in MSSCC. Genome-wide gene expression data and luciferase reporter assays indicated that lactate dehydro-genase B (LDHB) was directly regulated by miR-375. Cancer cell proliferation and invasion were significantly inhibited by transfection of si-LDHB into IMC-3 cells, suggesting that LDHB may play a role in MSSCC oncogenic function. In clinical MSSCC specimens, LDHB mRNA levels were up-regulated in cancer tissues, which were inversely correlated with the expression of miR-375. In addition, Kaplan-Meier curves and log-rank tests revealed that the high mRNA expression levels of LDHB had a significant adverse effect on survival rate. The identification of a cancer network regulated by the miR-375 tumor suppressor could provide new insights into the molecular mechanisms of MSSCC oncogenesis.
journal_name
Int J Oncoljournal_title
International journal of oncologyauthors
Kinoshita T,Nohata N,Yoshino H,Hanazawa T,Kikkawa N,Fujimura L,Chiyomaru T,Kawakami K,Enokida H,Nakagawa M,Okamoto Y,Seki Ndoi
10.3892/ijo.2011.1196subject
Has Abstractpub_date
2012-01-01 00:00:00pages
185-93issue
1eissn
1019-6439issn
1791-2423journal_volume
40pub_type
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