Following the publication of the above article, an interested reader drew to the Editor's attention that the β‑actin control protein band featured in the right‑hand lane of Fig. 1A on p. 54 appeared to be strikingly similar to the β‑actin control protein band featured in the right‑hand lane of Fig. 2B on the same page, albeit after vertical flipping and with possible horizontal and vertical resizing. Owing to the lack of availability of the raw western blot data due to the time that has elapsed since this paper was published, the authors have repeated the experiments and provided new western blots for these figures, which fully confirm the veracity of the findings presented in the originally published study. The revised versions of Figs. 1 and 2 are shown on the next page. In response to an additional query, the authors also wished to point out that the raw data from the PCR analysis (which were presented to the Editorial Office for inspection) confirmed that the data were correctly assembled from the original electropherograms, and that the part of Fig. 4C associated with the A2780/ADR cells was composed of two parts that came from the same experiment and the same run. They were put together as such, simply because they were loaded in two separate parts of the gel. The authors thank the Editor of International Journal of Oncology for granting them the opportunity to publish this corrigendum. All the authors agree with the publication of this corrigendum; furthermore, they apologize to the readership of the journal for any inconvenience caused. [International Journal of Oncology 47: 51‑60, 2015; DOI: 10.3892/ijo.2015.2987].