Mobile Phone Radiation Does Not Induce Pro-apoptosis Effects in Human Spermatozoa

Abstract Recent reports suggest that mobile phone radiation may diminish male fertility. However, the effects of this radiation on human spermatozoa are largely unknown. The present study examined effects of the radiation on induction of apoptosis-related properties in human spermatozoa. Ejaculated, density-purified, highly motile human spermatozoa were exposed to mobile phone radiation at specific absorption rates (SARs) of 2.0 and 5.7 W/kg. At various times after exposure, flow cytometry was used to examine caspase 3 activity, externalization of phosphatidylserine (PS), induction of DNA strand breaks, and generation of reactive oxygen species. Mobile phone radiation had no statistically significant effect on any of the parameters studied. This suggests that the impairment of fertility reported in some studies was not caused by the induction of apoptosis in spermatozoa.

[1]  T. Toivo,et al.  In vitro effect of pulsed 900 MHz GSM radiation on mitochondrial membrane potential and motility of human spermatozoa , 2008, Bioelectromagnetics.

[2]  Fabrizio Mancinelli,et al.  Electromagnetic fields at mobile phone frequency induce apoptosis and inactivation of the multi‐chaperone complex in human epidermoid cancer cells , 2005, Journal of cellular physiology.

[3]  Eli Jerby,et al.  Exposure of human peripheral blood lymphocytes to electromagnetic fields associated with cellular phones leads to chromosomal instability , 2003 .

[4]  L. Ouchchane,et al.  Fluorescence microscopy and flow cytometry in measuring activated caspases in human spermatozoa. , 2009, International journal of andrology.

[5]  R. Aitken,et al.  Impact of radio frequency electromagnetic radiation on DNA integrity in the male germline. , 2005, International journal of andrology.

[6]  P. Marchetti,et al.  Staining of human sperm with fluorochrome-labeled inhibitor of caspases to detect activated caspases: correlation with apoptosis and sperm parameters. , 2004, Human reproduction.

[7]  N. Kuster,et al.  1800 MHz radiofrequency (mobile phones, different Global System for Mobile communication modulations) does not affect apoptosis and heat shock protein 70 level in peripheral blood mononuclear cells from young and old donors , 2004, International journal of radiation biology.

[8]  A. Pál,et al.  IS THERE A RELATIONSHIP BETWEEN CELL PHONE USE AND SEMEN QUALITY? , 2005, Archives of andrology.

[9]  A. Ahlbom Guidelines for limiting exposure to time-varying electric, magnetic, and electromagnetic fields (up to 300 GHz) , 1998 .

[10]  A. Agarwal,et al.  Effects of radio-frequency electromagnetic waves from cellular phone on human semen parameters, DNA integrity and reactive oxygen species levels: an in vitro pilot study , 2008 .

[11]  N. Kuster,et al.  ROS release and Hsp70 expression after exposure to 1,800 MHz radiofrequency electromagnetic fields in primary human monocytes and lymphocytes , 2006, Radiation and environmental biophysics.

[12]  D. Vaamonde,et al.  Effect of different incubation conditions on phosphatidylserine externalization and motion parameters of purified fractions of highly motile human spermatozoa. , 2002, Journal of andrology.

[13]  S. Sikka,et al.  Characterization of reactive oxygen species induced effects on human spermatozoa movement and energy metabolism. , 1999, Free radical biology & medicine.

[14]  B. Gadella,et al.  Capacitation Induces Cyclic Adenosine 3′,5′-Monophosphate-Dependent, but Apoptosis-Unrelated, Exposure of Aminophospholipids at the Apical Head Plasma Membrane of Boar Sperm Cells1 , 2002, Biology of reproduction.

[15]  Eduardo G Moros,et al.  Measurement of DNA Damage and Apoptosis in Molt-4 Cells after In Vitro Exposure to Radiofrequency Radiation , 2004, Radiation research.

[16]  Bruce V. King,et al.  Mobile Phone Radiation Induces Reactive Oxygen Species Production and DNA Damage in Human Spermatozoa In Vitro , 2009, PloS one.

[17]  Dariusz Leszczynski,et al.  Non-thermal activation of the hsp27/p38MAPK stress pathway by mobile phone radiation in human endothelial cells: molecular mechanism for cancer- and blood-brain barrier-related effects. , 2002, Differentiation; research in biological diversity.

[18]  J E Moulder,et al.  Mobile phones, mobile phone base stations and cancer: a review , 2005, International journal of radiation biology.

[19]  J. Warchoł,et al.  Caspase-3 activation and phosphatidylserine membrane translocation in human spermatozoa: is there a relationship? , 2008, Reproductive biomedicine online.

[20]  C. Cinti,et al.  Exposure to 900 MHz electromagnetic field induces an unbalance between pro‐apoptotic and pro‐survival signals in T‐lymphoblastoid leukemia CCRF‐CEM cells , 2004 .

[21]  Ashok Agarwal,et al.  Effects of radiofrequency electromagnetic waves (RF-EMW) from cellular phones on human ejaculated semen: an in vitro pilot study. , 2009, Fertility and sterility.

[22]  Ashok Agarwal,et al.  Pathophysiology of cell phone radiation: oxidative stress and carcinogenesis with focus on male reproductive system , 2009, Reproductive biology and endocrinology : RB&E.

[23]  Guido Kroemer,et al.  Mitochondrial control of cell death , 2000, Nature Medicine.

[24]  S. Grunewald,et al.  Deterioration of plasma membrane is associated with activated caspases in human spermatozoa. , 2003, Journal of andrology.

[25]  R. Aitken The Amoroso Lecture. The human spermatozoon--a cell in crisis? , 1999, Journal of reproduction and fertility.

[26]  J. Tesarik,et al.  Apoptosis and necrosis in human ejaculated spermatozoa. , 2004, Human reproduction.

[27]  Yunlong Qi,et al.  In vitro and in vivo induction of human LoVo cells into apoptotic process by non-invasive microwave treatment: a potentially novel approach for physical therapy of human colorectal cancer. , 2004, Oncology reports.

[28]  A. Agarwal,et al.  Cell phones and male infertility: dissecting the relationship. , 2007, Reproductive biomedicine online.

[29]  Sylvie Bourthoumieu,et al.  No apoptosis is induced in rat cortical neurons exposed to GSM phone fields , 2007, Bioelectromagnetics.

[30]  I. Vermes,et al.  Measuring apoptosis in human spermatozoa: a biological assay for semen quality? , 2000, Fertility and sterility.

[31]  G. Ricci,et al.  Leukocyte detection in human semen using flow cytometry. , 2000, Human reproduction.

[32]  G. Martin,et al.  Phosphatidylserine externalization in human sperm induced by calcium ionophore A23187: relationship with apoptosis, membrane scrambling and the acrosome reaction. , 2005, Human reproduction.

[33]  A. Zini,et al.  Are tests of sperm DNA damage clinically useful? Pros and cons. , 2009, Journal of andrology.

[34]  Rony Seger,et al.  Mechanism of short-term ERK activation by electromagnetic fields at mobile phone frequencies. , 2007, The Biochemical journal.

[35]  A. Sannino,et al.  Lack of Genotoxic Effects (Micronucleus Induction) in Human Lymphocytes Exposed In Vitro to 900 MHz Electromagnetic Fields , 2003, Radiation research.

[36]  Haobo Zhang,et al.  Early apoptotic changes in human spermatozoa and their relationships with conventional semen parameters and sperm DNA fragmentation. , 2008, Asian journal of andrology.

[37]  Leeka Kheifets,et al.  Epidemiology of Health Effects of Radiofrequency Exposure , 2004, Environmental health perspectives.

[38]  A. Sannino,et al.  Exposure to 900 MHz Radiofrequency Radiation Induces Caspase 3 Activation in Proliferating Human Lymphocytes , 2008, Radiation research.

[39]  R. Aitken,et al.  Oxidative stress, sperm survival and fertility control , 2006, Molecular and Cellular Endocrinology.

[40]  Caterina Cinti,et al.  Exposure to 900 MHz electromagnetic field induces an unbalance between pro‐apoptotic and pro‐survival signals in T‐lymphoblastoid leukemia CCRF‐CEM cells , 2004, Journal of cellular physiology.

[41]  S H Kaufmann,et al.  Mammalian caspases: structure, activation, substrates, and functions during apoptosis. , 1999, Annual review of biochemistry.

[42]  A. Agarwal,et al.  Impact of caspase activation in human spermatozoa , 2009, Microscopy research and technique.

[43]  Ashok Agarwal,et al.  Effect of cell phone usage on semen analysis in men attending infertility clinic: an observational study. , 2008, Fertility and sterility.

[44]  P. Sims,et al.  Caspase-Independent Exposure of Aminophospholipids and Tyrosine Phosphorylation in Bicarbonate Responsive Human Sperm Cells1 , 2003, Biology of reproduction.

[45]  A. Wetzels,et al.  Low rates of DNA fragmentation in selected motile human spermatozoa assessed by the TUNEL assay. , 2001, Human reproduction.

[46]  B. Veyret,et al.  In Vitro Study of the Stress Response of Human Skin Cells to GSM-1800 Mobile Phone Signals Compared to UVB Radiation and Heat Shock , 2007, Radiation research.

[47]  D. Lloyd,et al.  Exposure to low level GSM 935 MHZ radiofrequency fields does not induce apoptosis in proliferating or differentiated murine neuroblastoma cells. , 2008, Radiation protection dosimetry.

[48]  Donald K Martin,et al.  An in vitro study of the effects of exposure to a GSM signal in two human cell lines: Monocytic U937 and neuroblastoma SK‐N‐SH , 2006, Cell biology international.

[49]  R. Henkel,et al.  Effect of reactive oxygen species produced by spermatozoa and leukocytes on sperm functions in non-leukocytospermic patients. , 2005, Fertility and sterility.

[50]  C. Yardin,et al.  Apoptosis is Induced by Radiofrequency Fields through the Caspase-Independent Mitochondrial Pathway in Cortical Neurons , 2008, Radiation research.

[51]  P. Marchetti,et al.  [Sperm apoptosis: myth or reality?]. , 2009, Gynecologie, obstetrique & fertilite.

[52]  P. Marchetti,et al.  Study of mitochondrial membrane potential, reactive oxygen species, DNA fragmentation and cell viability by flow cytometry in human sperm. , 2002, Human reproduction.

[53]  I. Thompson,et al.  Investigation, treatment and monitoring of late-onset hypogonadism in males. , 2009, International journal of andrology.

[54]  M Simkó,et al.  Comparative Study of Cell Cycle Kinetics and Induction of Apoptosis or Necrosis after Exposure of Human Mono Mac 6 Cells to Radiofrequency Radiation , 2006, Radiation research.

[55]  S. Oehninger,et al.  Analysis of DNA fragmentation, plasma membrane translocation of phosphatidylserine and oxidative stress in human spermatozoa. , 2000, Human reproduction.

[56]  Jukka Juutilainen,et al.  Proliferation, Oxidative Stress and Cell Death in Cells Exposed to 872 MHz Radiofrequency Radiation and Oxidants , 2008, Radiation research.