Klima-, Energi- og Forsyningsudvalget 2022-23 (2. samling)
KEF Alm.del Bilag 228
Offentligt
International Journal of
Molecular Sciences
Review
Magnetic Fields and Cancer: Epidemiology, Cellular Biology,
and Theranostics
Massimo E. Maffei
Department Life Sciences and Systems Biology, University of Turin, Via Quarello 15/a, 10135 Turin, Italy;
Citation:
Maffei, M.E. Magnetic
Fields and Cancer: Epidemiology,
Cellular Biology, and Theranostics.
Int. J. Mol. Sci.
2022,
23,
1339.
https://doi.org/10.3390/
ijms23031339
Academic Editor: Maurizio Battino
Received: 30 December 2021
Accepted: 22 January 2022
Published: 25 January 2022
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Abstract:
Humans are exposed to a complex mix of man-made electric and magnetic fields (MFs)
at many different frequencies, at home and at work. Epidemiological studies indicate that there is
a positive relationship between residential/domestic and occupational exposure to extremely low
frequency electromagnetic fields and some types of cancer, although some other studies indicate
no relationship. In this review, after an introduction on the MF definition and a description of
natural/anthropogenic sources, the epidemiology of residential/domestic and occupational exposure
to MFs and cancer is reviewed, with reference to leukemia, brain, and breast cancer. The in vivo
and in vitro effects of MFs on cancer are reviewed considering both human and animal cells, with
particular reference to the involvement of reactive oxygen species (ROS). MF application on cancer
diagnostic and therapy (theranostic) are also reviewed by describing the use of different magnetic
resonance imaging (MRI) applications for the detection of several cancers. Finally, the use of magnetic
nanoparticles is described in terms of treatment of cancer by nanomedical applications for the precise
delivery of anticancer drugs, nanosurgery by magnetomechanic methods, and selective killing of
cancer cells by magnetic hyperthermia. The supplementary tables provide quantitative data and
methodologies in epidemiological and cell biology studies. Although scientists do not generally
agree that there is a cause-effect relationship between exposure to MF and cancer, MFs might not be
the direct cause of cancer but may contribute to produce ROS and generate oxidative stress, which
could trigger or enhance the expression of oncogenes.
Keywords:
magnetic field; cancer; epidemiology; therapy; diagnostics; theranostic; MRI; magnetic
nanoparticles; nanomedicine; reactive oxygen species
1. Introduction
Public concern about electromagnetic fields (EMFs) from power systems is increasing
along with the electricity demand, wireless technologies, and changes in work systems and
social behavior [1–4]. For modern populations, extremely low-frequency (ELF) electric and
magnetic fields (MFs) are common exposures and complex biological mechanisms underly
the potential effects of externally-applied MFs [5,6]. In 2002, the International Agency for
Research on Cancer (IARC) categorized ELF (including the power frequencies of 50 and
60 Hz) MFs as “possibly carcinogenic to humans” [7].
Controversial and often contradictory scientific reports continue to stimulate debates
on the biological effects of EMFs, often leading to confusion and distraction which hamper
the development of univocal conclusions on the real hazards that are caused by EMFs [8].
In this review the association between MF and cancer will be reviewed by considering
the effect of MF in causing cancer as well as the application of MF as a therapeutic and
diagnostic (theranostic) tool. Epidemiological studies, including both domestic/residential
and occupational data, as well as human and animal cell studies that were published in the
last 20 years will be also considered to provide an overview of the state of the art literature.
The strategy that was implemented to carry out this review was based on a deep
search in the databases Web of Science (2000–2021), PubMed (2000–2021), and the EMF
Copyright:
© 2022 by the author.
Licensee MDPI, Basel, Switzerland.
This article is an open access article
distributed under the terms and
conditions of the Creative Commons
Attribution (CC BY) license (https://
creativecommons.org/licenses/by/
4.0/).
Int. J. Mol. Sci.
2022,
23,
1339. https://doi.org/10.3390/ijms23031339
https://www.mdpi.com/journal/ijms