Doxorubicin-transferrin Conjugate Alters Mitochondrial Homeostasis and Energy Metabolism in Human Breast Cancer Cells

Overview

Journal Sci Rep

Specialty Science

Date 2021 Feb 26

PMID 33633284

Citations 7

Authors

Paulina Wigner

Krzysztof Zielinski

Magdalena Labieniec-Watala

Agnieszka Marczak

Marzena Szwed

Affiliations

Soon will be listed here.

Abstract

Doxorubicin (DOX) is considered one of the most powerful chemotherapeutic agents but its clinical use has several limitations, including cardiomyopathy and cellular resistance to the drug. By using transferrin (Tf) as a drug carrier, however, the adverse effects of doxorubicin as well as drug resistance can be reduced. The main objective of this study was to determine the exact nature and extent to which mitochondrial function is influenced by DOX-Tf conjugate treatment, specifically in human breast adenocarcinoma cells. We assessed the potential of DOX-Tf conjugate as a drug delivery system, monitoring its cytotoxicity using the MTT assay and ATP measurements. Moreover, we measured the alterations of mitochondrial function and oxidative stress markers. The effect of DOX-Tf was the most pronounced in MDA-MB-231, triple-negative breast cancer cells, whereas non-cancer endothelial HUVEC-ST cells were more resistant to DOX-Tf conjugate than to free DOX treatment. A different sensitivity of two investigate breast cancer cell lines corresponded to the functionality of their cellular antioxidant systems and expression of estrogen receptors. Our data also revealed that conjugate treatment mediated free radical generation and altered the mitochondrial bioenergetics in breast cancer cells.

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