OL Oncology Letters 1792-1074 1792-1082 D.A. Spandidos 10.3892/ol.2025.15176 OL-30-3-15176 Retraction [Retracted] circ_103809 promotes breast cancer progression by regulating the PI3K/AKT signaling pathway QiuXiaoli WangQinghua SongHuiping ShaoDi XueJie 092025 07072025 30 3 430 Copyright: © 2025 Qiu et al. 2025 This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

Oncol Lett 19: 3725–3730, 2020; DOI: 10.3892/ol.2020.11507

Following the publication of this paper, it was drawn to the Editor's attention by a concerned reader that certain of the colony formation assay data shown in Fig. 2B on p. 3727 had already appeared in a previously published article in the journal Oncogene that was written by different authors at different research institutes. Owing to the fact that the contentious data in the above article had already been published prior to its submission to Oncology Letters, the Editor has decided that this paper should be retracted from the Journal. After contacting the authors, they accepted the decision to retract the paper. The Editor apologizes to the readership for any inconvenience caused.