Detection of Oxidative Stress Induced by Mobile Phone Radiation in Tissues of Mice using 8-Oxo-7, 8-Dihydro-2'-Deoxyguanosine as a Biomarker

We investigated oxidative DNA damage caused by radio frequency radiation using 8-oxo-7, 8-dihydro-2'- deoxyguanosine (8-oxodG) generated in mice tissues after exposure to 900 MHz mobile phone radio frequency in three independent experiments. The RF was generated by a Global System for Mobile Communication (GSM) signal generator. The radio frequency field was adjusted to 25 V/m. The whole body specific absorption rate (SAR) was 1.0 W/kg. Animals were exposed to this field for 30 min daily for 30 days. 24 h post-exposure, blood serum, brain and spleen were removed and DNA was isolated. Enzyme-linked immunosorbent assay (ELISA) was used to measure 8-oxodG concentration. All animals survived the whole experimental period. The body weight of animals did not change significantly at the end of the experiment. No statistically significant differences observed in the levels of oxidative stress. Our results are not in favor of the hypothesis that 900 MHz RF induces oxidative damage.




References:
[1] L. Hardell, M. Carlberg, and M. K. Hansson, "Epidemiological evidence
for an association between use of wireless phones and tumor diseases"
Pathophysiology, vol. , 16, pp. 113-122, 2009.
[2] V. G. Khurana, C. Teo, M. Kundi, L Hardell, and M. Carlberg, "Cell
phones and brain tumors: a review including the long-term
epidemiologic data", Surgical Neurology, vol. 72, pp. 205-215, 2009.
[3] R. J. Croft, R. J. Mckenzie, I. Inyang, G. P. Benke, V.Anderson, and M.
J. Abramson, "Mobile phones and brain tumors: a review of
epidemiological research", Australasian Physical and Engineering
Sciences in Medicine, vol. 31, pp. 255-267, 2008.
[4] A. Agarwal, N. R. Desai, K. Makker, A.Varghese, R. Mouradi, E.
Sabanegh, and R. Sharma, "Effects of radiofrequency electromagnetic
waves (RF-EMW) from cellular phones on human ejaculated semen: an
in vitro pilot study", Fertility and Sterility, vol. 92, pp. 1318-1325, 2009.
[5] G. N. De Iuliis, R. J. Newey, B. V. King, and R. J. Aitken, "Mobile
phone radiation induces reactive oxygen species production and DNA
damage in human spermatozoa in vitro", PLoS One, vol. 4, pp. e6446,
2009.
[6] N. Salama, T. Kishimoto, and H. O. Kanayama, "Effects of exposure to
a mobile phone on testicular function and structure in adult rabbit",
International Journal of Andrology, vol. 33, pp. 88-94, 2010.
[7] N. Falzone, C. Huyser, F. Fourie, T. Toivo, D. Leszczynski, and D.
Franken, "In vitro effect of pulsed 900 MHz GSM radiation on
mitochondrial membrane potential and motility of human spermatozoa",
Bioelectromagnetics, vol. 29, pp. 268-276, 2008.
[8] H. W. Ruediger, "Genotoxic effects of radiofrequency electromagnetic
fields", Pathophysiology, vol. 16 pp. 89-102, 2009.
[9] I. L. Hansteen, K. O. Clausen, V. Haugan, M. Svendsen, M. V.
Svendsen, J. K. Eriksen, et al. , "Cytogenetic effects of exposure to 2.3
GHz radiofrequency radiation on human lymphocytes in vitro",
Anticancer Research, vol. 29, pp. 4323-4330, 2009.
[10] A. Khalil, and A. Alshamali, "No significant cytogenetic effects in
cultured human lymphocytes exposed to cell phones radiofrequencies
(900MHz and 1800MHz)", Jordan Journal of Biological Sciences, vol.
3, pp. 21-28, 2010.
[11] P. Valbonesi, S. Franzellitti, A. Piano, A. Contin,C. Biondi, and E.
Fabbri, "Evaluation of HSP70 expression and DNA damage in cells of a
human trophoblast cell line exposed to 1.8 GHz amplitude-modulated
radiofrequency fields", Radiation Research, vol. 169, pp. 270-279, 2008.
[12] O. Zeni, A. Schiavoni, A. Perrotta, D. Forigo, M. Deplano, and M. R.
Scarfi, "Evaluation of genotoxic effects in human leukocytes after in
vitro exposure to 1950 MHz UMTS radiofrequency field",
Bioelectromagnetics, vol. 29, pp. 177-184, 2008.
[13] N. R. Desai, K. K. Kesari, and A. Agarwal, "Pathophysiology of cell
phone radiation: oxidative stress and carcinogenesis with focus on male
reproductive system", Reproductive Biology and Endocrinology, vol. 7,
pp. 114, 2009.
[14] K. K. Kesari, and J. Behari, "Microwave exposure affecting reproductive
system in male rats", Applied Biochemistry and Biotechnology, vol. 158,
pp. 126-139, 2009.
[15] M. Simko, "Cell type specific redox status is responsible for diverse
electromagnetic field effect", Current Medicinal Chemistry, vol. 14, pp.
1141-1152, 2007.
[16] H. Kasai, P. F. Crain, Y. Kuchino, S. Nishimura S, A. Ootsuyama, and
H. Tanooka, "Formation of 8-hydroxyguanine moiety in cellular DNA
by agents producing oxygen radicals and evidence for its repair",
Carcinogenesis, vol. 7, pp. 1849-1851, 1986.
[17] A. Valavanidis, T. Vlachogianni, and C. Fiotakis "8-Hydroxy-2'-
deoxyguanosine (8-OhdG): A Critical biomarker of oxidative stress and
carcinogenesis", Journal of Environmental Science and Health - Part C,
vol. 27, pp. 120-139, 2009.
[18] K. C. Cheng, D. S. Cahill, H. Kasai, S. Nishimura, and L. A. Loeb, "8-
Hydroxyguanine, an abundant form of oxidative DNA damage, causes
G----T and A----C substitutions", Journal of Biological Chemistry, vol.
267, pp. 166-172, 1992.
[19] HFSS, "High frequency structure simulator based on finite element
method", V11.0.2 Ansoft Corporation, 2007.
[20] O. P. Gandhi, G. Lazzi, and C. M. Furse, "Electromagnetic absorption in
the human head and neck for mobile telephones at 835 and 1900 MHZ",
IEEE Transaction on Microwave Theory and Technology, vol. 44, pp.
1884-1897, 1996.
[21] D. K. Lahiri, and J. I. Nurnberger, "A rapid non-enzymatic method for
the preparation of HMW DNA from blood for RFLP st Biochemical and
Molecular Medicine udies", Nucleic Acids Research, vol. 19, pp. 5444,
1991.
[22] J. R. Hofstetter, A. Zhang, A. R. Mayeda, J. I. Nurnberger, and D. K.
Lahiri, "Genomic DNA from mice: a comparison of recovery methods
and tissue sources", Biochemical and Molecular Medicine, vol. 62, pp.
197-202, 1997.
[23] H. G. Claycamp, "Phenol sensitization of DNA to subsequent oxidative
damage in 8-hydroxyguanine assays", Carcinogenesis, vol. 13, pp.
1289-1292, 1992.
[24] M. S. Cooke, M. D. Evans, K. E.Herbert, And J. L. Lunec, "Urinary 8-
oxo-2'-deoxyguanosineÔÇösource, significance and supplements",
Free Radical Research, vol. 32, pp. 381-397, 2000.
[25] A. Pilger, and H. W. Rudiger, "8-Hydroxy-2'-deoxyguanosine as a
marker of oxidative DNA damage related to occupational and
environmental exposures", International Archives of Occupational and
Environmental Health, vol. 80, pp. 1-15, 2006.
[26] B. Yin, R. M. Whyatt, F. P. Perera, M. C. Randall, T. B. Cooper, and R.
M. Santella, "Determination of 8-hydroxydeoxyguanosine by an
immunoaffinity chromatography-monoclonal antibody-based ELISA"
Free Radical Biology and Medicine , vol. 18, 1023-1032, 1995.
[27] K. Shimoi, H. Kasai, N. Yokota, and S. Toyokuni S, Kinae,
"Comparison between high-performance liquid chromatography and
enzyme-linked immunosorbent assay for the determination of 8-
hydroxy-2ÔÇ▓-deoxyguanosine in human urine", Cancer Epidemiology,
Biomarkers and Prevention, vol. 11, 767-770, 2002.
[28] J. Cadet, T. Douki, S. Frelon, S. Sauvaigo, J. P. Pouget, and J. L
Ravanat, "Assessment of oxidative base damage to isolated and cellular
DNA by HPLC-MS/MS measurement", Free Radical Biology and
Medicine, vol. 33, pp. 441-449, 2002.
[29] J. L. Ravanat, R. J. Turesky, E. Gremaud, L. J. Trudel, R. H. Stader,
"Determination of 8-oxoguanine in DNA by gas chromatography-mass
spectrometry and HPLC-electrochemical detection: overestimation of the
background level of the oxidized base by the gas chromatography-mass
spectrometry assay", Chemical Research in Toxicology, vol. 8, pp.
1039-1045, 1995.
[30] H. J. Helbock, K. B. Beckman, M. K. Shigenaga, P. Walter, A. A.
Woodall, H. C. Yeo, et al., "DNA oxidation matters: The HPLC-EC
assay of 8-oxo-deoxyguanosine and 8-oxo-guanine", Proceedings of the
National Academy of Sciences, USA, vol. 95, pp. 288-293, 1998.
[31] D. Mangal, D. Vudathala, J. H. Park, S. H. Lee, T. M. Penning, and I. A.
Blair, "Analysis of 8-oxo-2'-deoxyguanosine in cellular DNA during
oxidative stress", Chemical Research in Toxicology, vol. 22, pp. 788-
797, 2009.
[32] J. L. Ravanat, T. Douki, P. Duez, E. Gremaud, K. Herbert, T. Hofer, et
al. , "Cellular background level of 8-oxo-7, 8-dihydro-2ÔÇ▓-
deoxyguanosine: an isotope based method to evaluate artefactual
oxidation of DNA during its extraction and subsequent work-up",
Carcinogenesis, vol. 23, pp. 1911-1918, 2002.
[33] M. Ammari, A. Lecomte, M. Sakly, H. Abdelmelek, and R. de-Seze,
"Exposure to GSM 900 MHz electromagnetic fields affects cerebral
cytochrome c oxidase activity", Toxicology, vol. 250, pp. 70-74, 2008.
[34] G. Borthakur, C. Butryee, M. Stacewicz-Sapuntzakis, and P. E. Bowen,
"Exofoliated buccal cells as source of DNA to study oxidative stress",
Cancer Epidemiology, Biomarkers & Prevention, vol. 17, pp. 212-219,
2008.
[35] A. Tomruk, G. G. Goknur, and A. S. Dincel, "The Influence of
1800 MHz GSM-like signals on hepatic oxidative DNA and lipid
damage in nonpregnant, pregnant, and newly born rabbits", Cell
Biochemistry and Biophysics, vol. 56, pp. 39-47, 2010.
[36] S. Xu, Z. Zhou, L. Zhang, Z. Yu, W. Zhang, Y. Wang, et al., "Exposure
to 1800 MHz radiofrequency radiation induces oxidative damage to
mitochondrial DNA in primary cultured neurons", Brain Research, vol.
1311, pp. 189-196, 2010.
[37] K. Hubbard, H. Huang, M. F. Laspia, H. Ide, B. F. Erlanger, and S. S.
Wallace, "Immunochemical quantitation of thymine glycol in oxidized
and X-irradiated DNA", Radiation Research, vol. 118, pp. 257-268,
1989.
[38] J. Musarrat, J. Arezina-Wilson, and A. Wani, "Prognostic and
aetiological relevance of 8-hydroxyguanosine in human breast
carcinogenesis" European Journal of Cancer, vol. 32A pp. 1209-1214,
1996.
[39] J. Liao, D. N. Seril, G. G. Lu, M. Zhang, S. ToyokuniS, A. L. yang, et
al., "Increased susceptibility of chronic ulcerative colitis-induced
carcinoma development in DNA repair enzyme Ogg1 deficient mice",
Molecular Carcinogenesis, vol. 47, pp. 638-646, 2008.
[40] A. Azqueta, S. Shaposhnikov, and A. R. Collins, "DNA oxidation:
investigating its key role in environmental mutagenesis with the comet
assay", Mutation Research, vol. 674, pp. 101-108, 2009.
[41] 41. J. A. Elder, "Survival and cancer in laboratory mammals exposed to
radiofrequency energy", Bioelectromagnetics Supplement, vol. 6, pp.
S101-S106, 2003.
[42] 42. A. I. Yurekli, M. Ozkan, T. Kalkan, H. Saybasili, H. Tuncel, H.P.
Atukeren, et al., "GSM base station electromagnetic radiation and
oxidative stress in rats", Electromagnetic Biology and Medicine, vol. 25,
pp. 177-188, 2006.
[43] 43. E. P. Ribeiro, E. L. Rhoden, M. M. Horn, C. Rhoden, L.P. Lima, and
L. Toniolo, "Effects of sub chronic exposure to radio frequency from a
conventional cellular telephone on testicular function in adult rats",
Journal of Urology, vol. 177, pp. 395-399, 2007.
[44] 44. T. H. Kim, T. Q. Huang , J. J. Jang , M. H. Kim, H. J. Kim, J. S. Lee,
et al., "Local exposure of 849 MHz and 1763 MHz radiofrequency
radiation to mouse heads does not induce cell death or cell proliferation
in brain", Experimental and Molecular Medicine, vol. 40, pp. 294-303,
2008.
[45] A. M. Sommer, J. Streckert, A. K. Bitz, V. W. Hansen, and A. Lerchl,
"No effects of GSM-modulated 900 MHz electromagnetic fields on
survival rate and spontaneous development of lymphoma in female
AKR/J mice", BMC Cancer, vol. 4, 77-90, 2004.
[46] A. Lerchl, H. Kr├╝ger, M. Niehaus, J. R. Streckert, A. K. Bitz, and V.
Hansen, "Effects of mobile phone electromagnetic fields at nonthermal
SAR values on melatonin and body weight of Djungarian hamsters
(Phodopus sungorus)", Journal of Pineal Research, vol. 44, pp. 267-
272, 2008.
[47] W. Dong, D. Gao, and X. Zhang, "Mitochondria biogenesis induced by
resveratrol against brain ischemic stroke", Medical Hypotheses,vol. 69,
700-701, 2007.
[48] Lin MT, Beal MF. 2006. Mitochondrial dysfunction and oxidative stress
in neurodegenerative diseases. Nature 443: 787-795.
[49] F. Oktem, F. Ozguner, H. Mollaoglu, A. Koyu, and E. Uz, "Oxidative
damage in the kidney induced by 900-MHz-emitted mobile phone:
protection by melatonin", Archives of Medical 35 Research, vol. pp.
350-355, 2005.
[50] E. W. Austin, J. M. Parish, D. H. Kinder, and R. J. Bull, "Lipid
peroxidation and formation of 8-hydroxydeoxyguanosine from acute
doses of halogenated acetic acids", Fundamental and Applied
Toxicology, vol. 31, pp. 77-82, 1996.