Research Papers:

Locked nucleic acid-inhibitor of miR-205 decreases endometrial cancer cells proliferation in vitro and in vivo

Anna Torres _, Joanna Kozak, Agnieszka Korolczuk, Dominika Rycak, Paulina Wdowiak, Ryszard Maciejewski and Kamil Torres

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Oncotarget. 2016; 7:73651-73663. https://doi.org/10.18632/oncotarget.12043

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Anna Torres1, Joanna Kozak1, Agnieszka Korolczuk2, Dominika Rycak1, Paulina Wdowiak1, Ryszard Maciejewski3, Kamil Torres3

1Laboratory of Biostructure, Chair and Department of Human Anatomy, Medical University of Lublin, Jaczewskiego 4, 20-090, Lublin, Poland

2Department of Clinical Pathomorphology, Medical University of Lublin, Jaczewskiego 8, 20-090, Lublin, Poland

3Chair and Department of Human Anatomy, Medical University of Lublin, Jaczewskiego 4, 20-090, Lublin, Poland

Correspondence to:

Anna Torres, email: [email protected]

Keywords: miR-205-LNA-inhibitor, endometrial cancer, in vivo, mice xenograft, locked nucleic acid

Received: January 06, 2016     Accepted: August 27, 2016     Published: September 15, 2016


Pathogenesis of endometrial cancer has been connected with alterations of microRNA expression and in particular miR-205 up–regulation was consistently reported in this carcinoma. Presented study aimed to investigate if inhibition of miR-205 expression using LNA-modified-nucleotide would attenuate endometrial cancer cells proliferation in vitro and in vivo.

In the course of the study we found that the proliferation of endometrial cancer cells (HEC-1-B, RL-95, KLE, Ishikawa) transfected with LNA-miR-205-inhibitor and evaluated using real time cell monitoring as well as standard cell proliferation assay, was significantly decreased. Next, LNA-miR-205-inhibitor was used to assess the in vivo effects of miR-205 inhibition of endometrial cancer growth. Cby.Cg-Foxn1<nu>/cmdb mice bearing endometrial cancer xenografts were intraperitoneally injected with nine dosages of 25mg/kg of miR-205-LNA-inhibitor or scramble control or phosphatase buffered saline and were observed for 32 days. We found that systemic administration of miR-205-LNA-inhibitor was technically possible, and exerted inhibitory effect on endometrial cancer xenograft growth in vivo with only mild toxic effects in treated animals.

In conclusion our results suggest that systemic delivery of miR-205-LNA-inhibitor is feasible, devoid of significant toxicity, and could be a promising treatment strategy for endometrial cancer. Therefore it warrants further studies in other animal models.

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