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Inhibition of human APE1 and MTH1 DNA repair proteins by dextran-coated γ-Fe2O3 ultrasmall superparamagnetic iron oxide nanoparticles

Published

Author(s)

Erdem Coskun, Pawel Jaruga, Miral M. Dizdar, Bryant C. Nelson, Neenu Singh, Leona Scanlan, Shareen Doak

Abstract

Aim: To quantitatively evaluate the inhibition of human DNA repair proteins APE1 and MTH1 by dextran-coated γ-Fe2O3 ultrasmall superparamagnetic iron oxide nanoparticles (dUSPIONs). Materials & methods: Liquid chromatography–tandem mass spectrometry with isotope-dilution was used to measure the expression levels of APE1 and MTH1 in MCL-5 cells exposed to increasing doses of dUSPIONs. The expression levels of APE1 and MTH1 were measured in cytoplasmic and nuclear fractions of cell extracts. Results: APE1 andMTH1 expression was significantly inhibited in both cell fractions at the highest dUSPION dose. The expression of MTH1 was linearly inhibited across the full dUSPION dose range in both fractions. Conclusion: These findings warrant further studies to characterize the capacity of dUSPIONs to inhibit other DNA repair proteins in vitro and in vivo.
Citation
Nanomedicine

Citation

Coskun, E. , Jaruga, P. , Dizdar, M. , Nelson, B. , Singh, N. , Scanlan, L. and Doak, S. (2023), Inhibition of human APE1 and MTH1 DNA repair proteins by dextran-coated γ-Fe2O3 ultrasmall superparamagnetic iron oxide nanoparticles, Nanomedicine, [online], https://doi.org/10.2217/nnm-2022-0204, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934660 (Accessed March 5, 2024)
Created February 28, 2023