Open Access Article
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Retraction: Biocompatible dextran-coated gadolinium-doped cerium oxide nanoparticles as MRI contrast agents with high T1 relaxivity and selective cytotoxicity to cancer cells
A. L. Popovab,
M. A. Abakumovcd,
I. V. Savintsevab,
A. M. Ermakovb,
N. R. Popovab,
O. S. Ivanovaa,
D. D. Kolmanovichb,
A. E. Baranchikova and
V. K. Ivanov*a
aKurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninsky av., 31, Moscow 119991, Russia. E-mail: van@igic.ras.ru
bInstitute of Theoretical and Experimental Biophysics of the Russian Academy of Sciences, Institutskaya, 3, Pushchino 142290, Russia
cDepartment of Medical Nanobiotechnology, Pirogov Russian National Research Medical University, 117997 Moscow, Russia
dBiomedical Nanomaterials Laboratory, National University of Science and Technology “MISiS”, Leninskiy prospect, 4, Moscow, Russia
First published on 5th June 2025
Abstract
Retraction of ‘Biocompatible dextran-coated gadolinium-doped cerium oxide nanoparticles as MRI contrast agents with high T1 relaxivity and selective cytotoxicity to cancer cells’ by A. L. Popov et al., J. Mater. Chem. B, 2021, 9, 6586–6599, https://doi.org/10.1039/D1TB01147B.
The Royal Society of Chemistry, with the agreement of the authors, hereby wholly retracts this Journal of Materials Chemistry B article due to concerns with the reliability of the data.
In the TEM data in Fig. 1b there is an unexpected repeating pattern.
In Fig. 5a the 5 panels for hMSc control to 5 mg mL−1 are identical to the panels for 24 h control, 0.6 mg mL−1 to 5 mg mL−1 of sample 1 in Fig. 5 of ref. 1.
In Fig. 6a the 4 panels for hMsc control to 2.5 mg mL−1 are identical to the panels for 24 h control, 0.6 mg mL−1 to 2.5 mg mL−1 of sample 1 in Fig. 6 of ref. 1.
In Fig. 6a the panel for MCF-7 control has partial overlap with the panel for MCF-7 5 mg mL−1.
Given the significance of these concerns, the findings presented in this paper are no longer reliable.
Signed: A. L. Popov, M. A. Abakumov, I. V. Savintseva, A. M. Ermakov, N. R. Popova, O. S. Ivanova, D. D. Kolmanovich, A. E. Baranchikov and V. K. Ivanov
Date: 27th May 2025
Retraction endorsed by Michaela Mühlberg, Executive Editor, Journal of Materials Chemistry B
References
1 A. L. Popov, et al., Molecules, 2023, 28(3), 1165, DOI: 10.3390/molecules28031165.| This journal is © The Royal Society of Chemistry 2025 |