Abstract
It has been brought to our attention that there was an important omission of the word 'shRNA', which should have been featured in a couple of places in the above article. The authors incorrectly claimed that the RNA‑dependent protein kinase (PKR) acts as a tumor suppressor; in fact, it is the PKR shRNA that would fulfil the role of being a tumor suppressor. Therefore, the text in the Abstract on p. 2267, line 14, should have read "...these findings suggested that PKR shRNA acts as a tumor suppressor"; likewise, on p. 2272, towards the end of the final sentence of the second paragraph of the Discussion, the text should have read "The results show that PKR silencing inhibits tumor growth, suggesting that PKR shRNA acts as a tumor supressor...". The authors regret that this error was not corrected before the article went to print, and they thank the reader concerned for drawing the matter to our attention. [the original article was published in the Oncology Reports 32: 2267‑2273, 2014; DOI: 10.3892/or.2014.3410].