Lack of a Co-Promoting Effect of a 60 Hz Magnetic Field on Skin Tumorigenesis in SENCAR Mice

Journal Article · Tue Sep 15 00:00:00 EDT 1998 · Carcinogenesis

DOI:https://doi.org/10.1093/carcin/19.9.1617· OSTI ID:1578036

Sasser, Lyle B. ^[1]; Anderson, Larry E. ^[1]; Morris, James E. ^[1]; Miller, Douglas L. ^[1]; Walborg, E F. ^[2]; Kavet, Robert ^[3]; Johnston, D A. ^[4]; Di Giovanni, John ^[5]

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1. BATTELLE (PACIFIC NW LAB)
2. Dermigen
3. EPRI
4. Dermagen
5. MD Anderson Cancer Center

It has been proposed that extremely low frequency (ELF) magnetic fields may enhance tumorigenesis through a co-promotional mechanism. This hypothesis has been further tested using the two-stage model of mouse skin carcinogenesis, i.e. 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced promotion of skin tumors in mice initiated by a single subcarcinogenic dose of 7,12-dimethylbenz[a]anthracene. Experimentation described herein utilized the SENCAR mouse and examined the effect of a magnetic field on skin tumor promotion induced by three different doses of TPA within its dose-response range, i.e. 0.85, 1.70 or 3.40 nmol, administered twice per week. SENCAR mice (56/treatment group) were exposed to a 60 Hz magnetic field having a flux density of 2 mT for 6 h/day for 5 days/week and compared with mice exposed to the ambient magnetic field. Tumor incidence and multiplicity were monitored weekly for 23 weeks of TPA promotion. Statistical evaluation of the effects of the magnetic field on tumor incidence and multiplicity did not reveal any statistically significant effects; thus, within the sensitivity limits imposed by the animal model and the exposure parameters employed, no promotional or co-promotional effect of a 2 mT magnetic field on skin tumor development in SENCAR mice could be demonstrated.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1578036
• Report Number(s): PNNL-SA-4586
• Journal Information: Carcinogenesis, Journal Name: Carcinogenesis Journal Issue: 9 Vol. 19; ISSN 1460-2180
• Country of Publication: United States
• Language: English