Follow up study on the immune response to low frequency electromagnetic fields in men and women working in a museum
Seven women and eight men, exposed to low frequency (50 Hz) electromagnetic fields (EMFs) in a museum for 20 hours a week, were investigated in the years 1999 and 2005. During the first study, the mean EMF exposure in the working place was 1.7 microT and 1.1 microT, respectively. In the first investigation, the EMF-exposed men showed reduced blood NK lymphocytes in relation to controls, while EMF-exposed women presented reduced PHA-stimulated IFN-gamma release from peripheral blood mononuclear cells (PBMC). In the year 2005, blood cytotoxic activity, state and trait anxiety (STAI I and II, respectively) and occupational stress were also investigated. The scores of STAI I and II of the control women were slightly higher than those of the control men. EMF-exposed men showed higher occupational stress but normal immune parameters. EMF-exposed women showed, in relation to controls, lower PHA-stimulated IFN-gamma release from PBMC and reduced blood cytotoxic activity/CD45+-CD16+-56+ NK lymphocytes (but not per ml of blood). One of the women exposed to EMF, who worked a night shift, showed marked lymphopenia with very low NK lymphocytes and reduced IFN-gamma release; these immune parameters returned to normal following a change of work site. This study suggests that low frequency EMFs affect the immune functions of women more than those of men. Moreover, the determination of immune parameters seems to be a useful marker of the health effects of exposure to EMFs.
Available from: Rosa M Busquets
- "Otherwise other possible reasons should be considered: firstly, it would be necessary to assess the potential effect of electromagnetic fields generated by electrical appliances on children′s immune systems and their effect on AD development in particular. In fact, the presence of electromagnetic fields has been shown to affect the immune system  and may, therefore, be involved in some way in the aetiology of AD . Secondly, these results might be in line with the “hygiene theory”; it hypothesises that the non-exposure to risk factors during childhood and development of infections results in a lack of exposure to the necessary stimuli to help the immune system mature with the following inception of allergic disorders [2,27]. "
[Show abstract] [Hide abstract]
ABSTRACT: Atopic dermatitis (AD) prevalence has considerably increased worldwide in recent years. Studying indoor environments is particularly relevant, especially in industrialised countries where many people spend 80% of their time at home, particularly children. This study is aimed to identify the potential association between AD and the energy source (biomass, gas and electricity) used for cooking and domestic heating in a Spanish schoolchildren population.
As part of the ISAAC (International Study of Asthma and Allergies in Childhood) phase III study, a cross-sectional population-based survey was conducted with 21,355 6-to-7-year-old children from 8 Spanish ISAAC centres. AD prevalence, environmental risk factors and the use of domestic heating/cooking devices were assessed using the validated ISAAC questionnaire. Crude and adjusted odds ratios (cOR, aOR) and 95% confidence intervals (CIs) were obtained. A logistic regression analysis was performed (Chi-square test, p-value < 0.05).
It was found that the use of biomass systems gave the highest cORs, but only electric cookers showed a significant cOR of 1.14 (95% CI: 1.01-1.27). When the geographical area and the mother’s educational level were included in the logistic model, the obtained aOR values differed moderately from the initial cORs. Electric heating was the only type which obtained a significant aOR (1.13; 95% CI: 1.00-1.27). Finally, the model with all selected confounding variables (sex, BMI, number of siblings, mother’s educational level, smoking habits of parents, truck traffic and geographical area), showed aOR values which were very similar to those obtained in the previous adjusted logistic analysis. None of the results was statistically significant, but the use of electric heating showed an aOR close to significance (1.14; 95% CI: 0.99-1.31).
In our study population, no statistically significant associations were found between the type of indoor energy sources used and the presence of AD.
Available from: Karel Ulbrich
- "The NK cells have an important role, though not decisive, in anticancer response where CTL cells are the major player in the game. The possibility of the effects of EMF on activity of the immune functions in living organisms has already been hypothesized and tested (Arafa et al., 2003; Di Giampaolo et al., 2006; Tuschl et al., 2006; Boscolo et al., 2007; Akan et al., 2010; Kleijn et al., 2011) but never directly demonstrated in vivo. For instance, Rossi et al. (2007) report that ELF-EMFs (source SEQEX) reduce the oxidative stress and the side effects of chemotherapy, and specifically myelodepression (myelotoxicity), in patients with Hodgkin's lymphoma. "
[Show abstract] [Hide abstract]
ABSTRACT: We have investigated the effects of low-frequency pulsed electromagnetic field (LF-EMF) produced by BEMER device on experimental mouse T-cell lymphoma EL4 growing on conventional and/or athymic (nude) mice. Exposure to EMF-BEMER slowed down the growth of tumor mass and prolonged the survival of experimental animals. The effect was more pronounced in immuno-compromised nude mice compared to conventional ones. Acceleration of tumor growth was never observed. No measurable levels of Hsp 70 or increased levels of specific anti-EL4 antibodies were detected in the serum taken from experimental mice before and at different intervals during the experiment, i.e. before solid tumor appeared, at the time of its aggressive growth, and at the terminal stage of the disease. A significant synergizing antitumor effect was seen when EL4 tumor-bearing mice were simultaneously exposed to EMF-BEMER and treated with suboptimal dose of synthetic HPMA copolymer-based doxorubicin, DOX(HYD)-HPMA. Such a combination may be especially useful for heavily treated patients suffering from advanced tumor and requiring additional aggressive chemotherapy which, however, at that time could represent almost life-threatening way of medication.
[Show abstract] [Hide abstract]
ABSTRACT: Blood cytotoxic activity is involved in a bidirectional network of immune and neuroendocrine mechanisms. Pro-inflammatory cytokines induce mood changes including depression and fatigue. On the other hand, blood NK activity is reduced by anxiety, depression, occupational stress, job insecurity and unemployment and is improved by physical activity as well as by a healthy lifestyle and mental status. Moreover, blood NK activity may be reduced by exposure to smoke and xenobiotics, along with a shift of the Th1/Th2 immune balance towards Th2; the impaired NK activity of smokers may be restored by fermented milk containing Lactobacillus casei in the diet. Copyright © 2008 by New Century Health Publishers, LLC. All rights of reproduction in any form reserved.
Data provided are for informational purposes only. Although carefully collected, accuracy cannot be guaranteed. The impact factor represents a rough estimation of the journal's impact factor and does not reflect the actual current impact factor. Publisher conditions are provided by RoMEO. Differing provisions from the publisher's actual policy or licence agreement may be applicable.