IJMM International Journal of Molecular Medicine 1107-3756 1791-244X D.A. Spandidos 10.3892/ijmm.2026.5954 ijmm-58-04-05954 Expression of Concern [Expression of Concern] Exogenous spermine attenuates diabetic kidney injury in rats by inhibiting AMPK/mTOR signaling pathway ZhangXinying ZhangLi ChenZhe LiSiwei CheBingbing WangNingning ChenJunting XuChangqing WeiCan 10 2026 12 08 2026 58 4 283 Copyright: © 2026 Zhang et al. 2026 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.

Int J Mol Med 47: 27, 2021; DOI: 10.3892/ijmm.2021.4860

Following the publication of the above paper, it was drawn to the Editor's attention by an interested reader that the CD-2AP and podocin protein blots shown in Fig. 3A on p. 6 were strikingly similar, suggesting that the same data had apparently been used to represent the two different proteins.

The authors have been contacted by the Editorial Office to offer an explanation for the apparent duplication of data in this figure, and we are awaiting their response. Owing to the fact that the Editorial Office has been made aware of potential issues surrounding the scientific integrity of this paper, we are issuing an Expression of Concern to notify readers of this potential problem while the Editorial Office continues to investigate this matter further.