RESUMO
Clinical research aiming at objectively identifying and characterizing diseases via clinical observations and biological and radiological findings is a critical initial research step when establishing objective diagnostic criteria and treatments. Failure to first define such diagnostic criteria may lead research on pathogenesis and etiology to serious confounding biases and erroneous medical interpretations. This is particularly the case for electrohypersensitivity (EHS) and more particularly for the so-called "provocation tests", which do not investigate the causal origin of EHS but rather the EHS-associated particular environmental intolerance state with hypersensitivity to man-made electromagnetic fields (EMF). However, because those tests depend on multiple EMF-associated physical and biological parameters and have been conducted in patients without having first defined EHS objectively and/or endpoints adequately, they cannot presently be considered to be valid pathogenesis research methodologies. Consequently, the negative results obtained by these tests do not preclude a role of EMF exposure as a symptomatic trigger in EHS patients. Moreover, there is no proof that EHS symptoms or EHS itself are caused by psychosomatic or nocebo effects. This international consensus report pleads for the acknowledgement of EHS as a distinct neuropathological disorder and for its inclusion in the WHO International Classification of Diseases.
Assuntos
Biomarcadores/metabolismo , Hipersensibilidade/metabolismo , Sensibilidade Química Múltipla/metabolismo , Animais , Consenso , Diagnóstico por Imagem/métodos , Testes Diagnósticos de Rotina/métodos , Campos Eletromagnéticos , Humanos , Doenças do Sistema Nervoso/metabolismoRESUMO
Electromagnetic hypersensitivity (EHS), known in the past as "Microwave syndrome", is a clinical syndrome characterized by the presence of a wide spectrum of non-specific multiple organ symptoms, typically including central nervous system symptoms, that occur following the patient's acute or chronic exposure to electromagnetic fields in the environment or in occupational settings. Numerous studies have shown biological effects at the cellular level of electromagnetic fields (EMF) at magnetic (ELF) and radio-frequency (RF) frequencies in extremely low intensities. Many of the mechanisms described for Multiple Chemical Sensitivity (MCS) apply with modification to EHS. Repeated exposures result in sensitization and consequent enhancement of response. Many hypersensitive patients appear to have impaired detoxification systems that become overloaded by excessive oxidative stress. EMF can induce changes in calcium signaling cascades, significant activation of free radical processes and overproduction of reactive oxygen species (ROS) in living cells as well as altered neurological and cognitive functions and disruption of the blood-brain barrier. Magnetite crystals absorbed from combustion air pollution could have an important role in brain effects of EMF. Autonomic nervous system effects of EMF could also be expressed as symptoms in the cardiovascular system. Other common effects of EMF include effects on skin, microvasculature, immune and hematologic systems. It is concluded that the mechanisms underlying the symptoms of EHS are biologically plausible and that many organic physiologic responses occur following EMF exposure. Patients can have neurologic, neuro-hormonal and neuro-psychiatric symptoms following exposure to EMF as a consequence of neural damage and over-sensitized neural responses. More relevant diagnostic tests for EHS should be developed. Exposure limits should be lowered to safeguard against biologic effects of EMF. Spread of local and global wireless networks should be decreased, and safer wired networks should be used instead of wireless, to protect susceptible members of the public. Public places should be made accessible for electrohypersensitive individuals.
Assuntos
Hipersensibilidade , Sensibilidade Química Múltipla , Campos Eletromagnéticos/efeitos adversos , Humanos , Hipersensibilidade/epidemiologia , Hipersensibilidade/etiologia , Micro-Ondas , Ondas de RádioRESUMO
The purpose of the study was to measure urinary organophosphate (OP) metabolites in Palestinian pregnant women, and to compare levels with those in pregnant women in Jerusalem and women from the general population in Israel. We measured six dialkyl phosphates in urine samples collected from 148 pregnant women from the West Bank area. Median total dimethyl phosphate (DM(total)) levels were significantly lower in Palestinian women compared to Jerusalem pregnant women and women in Israel (p = 0.041). In Palestinian women reporting that their place of residence was near an agricultural field, DM(total) levels were significantly higher (p = 0.037). Lower urinary excretion of dimethyl phosphate pesticide metabolites in Palestinian women compared to Israeli women may result from lower consumption of fruits and vegetables in the Palestinian population. Our findings highlight differences in OP pesticide exposure in populations with close geographical proximity but with differences in culture, diet, lifestyle, and regulatory oversight of pesticides.
Assuntos
Exposição Ambiental , Poluentes Ambientais/urina , Organofosfatos/urina , Compostos Organofosforados/urina , Praguicidas/urina , Adolescente , Adulto , Análise de Variância , Árabes , Dieta , Monitoramento Ambiental , Poluentes Ambientais/metabolismo , Feminino , Humanos , Oriente Médio , Organofosfatos/metabolismo , Praguicidas/metabolismo , Gravidez , Fatores de Risco , Adulto JovemRESUMO
With 5.9 billion reported users, mobile phones constitute a new, ubiquitous and rapidly growing exposure worldwide. Mobile phones are two-way microwave radios that also emit low levels of electromagnetic radiation. Inconsistent results have been published on potential risks of brain tumors tied with mobile phone use as a result of important methodological differences in study design and statistical power. Some studies have examined mobile phone users for periods of time that are too short to detect an increased risk of brain cancer, while others have misclassified exposures by placing those with exposures to microwave radiation from cordless phones in the control group, or failing to attribute such exposures in the cases. In 2011, the World Health Organization, International Agency for Research on Cancer (IARC) advised that electromagnetic radiation from mobile phone and other wireless devices constitutes a "possible human carcinogen," 2B. Recent analyses not considered in the IARC review that take into account these methodological shortcomings from a number of authors find that brain tumor risk is significantly elevated for those who have used mobile phones for at least a decade. Studies carried out in Sweden indicate that those who begin using either cordless or mobile phones regularly before age 20 have greater than a fourfold increased risk of ipsilateral glioma. Given that treatment for a single case of brain cancer can cost between $100,000 for radiation therapy alone and up to $1 million depending on drug costs, resources to address this illness are already in short supply and not universally available in either developing or developed countries. Significant additional shortages in oncology services are expected at the current growth of cancer. No other environmental carcinogen has produced evidence of an increased risk in just one decade. Empirical data have shown a difference in the dielectric properties of tissues as a function of age, mostly due to the higher water content in children's tissues. High resolution computerized models based on human imaging data suggest that children are indeed more susceptible to the effects of EMF exposure at microwave frequencies. If the increased brain cancer risk found in young users in these recent studies does apply at the global level, the gap between supply and demand for oncology services will continue to widen. Many nations, phone manufacturers, and expert groups, advise prevention in light of these concerns by taking the simple precaution of "distance" to minimize exposures to the brain and body. We note than brain cancer is the proverbial "tip of the iceberg"; the rest of the body is also showing effects other than cancers.
RESUMO
BACKGROUND: From September 1999 through January 2004 during the second Intifada (al-Aqsa), there were frequent terror attacks in Jerusalem. We assessed the effects on case fatality of introducing a specialized, intensified approach to trauma care at the Hebrew University-Hadassah Hospital Shock Trauma Unit (HHSTU) and other level I Israeli trauma units. This approach included close senior supervision of prehospital triage, transport, and all surgical procedures and longer hospital stays despite high patient-staff ratios and low hospital budgets. Care for lower income patients also was subsidized. METHODS: We tracked case fatality rates (CFRs) initially during a period of terror attacks (1999-2003) in 8,127 patients (190 deaths) at HHSTU in subgroups categorized by age, injury circumstances, and injury severity scores (ISSs). Our comparisons were four other Israeli level I trauma centers (n = 2,000 patients), and 51 level I U.S. trauma centers (n = 265,902 patients; 15,237 deaths). Detailed HHSTU follow-up continued to 2010. RESULTS: Five-year HHSTU CFR (2.62 %) was less than half that in 51 U.S. centers (5.73 %). CFR progressively decreased; in contrast to a rising trend in the US for all age groups, injury types, and ISS groupings, including gunshot wounds (GSW). Patients with ISS > 25 accounted for 170 (89 %) of the 190 deaths in HHSTU. Forty-one lives were saved notionally based on U.S. CFRs within this group. However, far more lives were saved from reductions in low CFRs in large numbers of patients with ISS < 25. CFRs in HHSTU and other Israeli trauma units decreased more through the decade to 1.9 % up to 2010. CONCLUSIONS: Sustained reductions in trauma unit CFRs followed introduction of a specialized, intensified approach to trauma care.
Assuntos
Mortalidade , Terrorismo/estatística & dados numéricos , Centros de Traumatologia/estatística & dados numéricos , Ferimentos e Lesões/epidemiologia , Ferimentos e Lesões/terapia , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Humanos , Lactente , Recém-Nascido , Escala de Gravidade do Ferimento , Israel/epidemiologia , Pessoa de Meia-Idade , Sistema de Registros , Estados Unidos/epidemiologia , Ferimentos e Lesões/diagnóstico , Ferimentos e Lesões/mortalidade , Adulto JovemRESUMO
BACKGROUND: The effects of electromagnetic fields (EMFs) on cardiovascular calcification is unknown. We sought to evaluate the effects of EMF on vascular calcification in normal rats and in rats with chronic kidney disease (CKD) - a condition which promotes calcification. METHODS: We used four groups of rats: group 1 - exposed to EMF, group 2 - not exposed to EMF, group 3 - rats with CKD exposed to EMF, group 4 - rats with CKD not exposed to EMF. In order to induce CKD, groups 3 and 4 rats were fed with a uremia-inducing diet. Groups 1 and 3 rats were continuously exposed to EMF using a system similar to an electrical transformer, which consists of a primary coil, a ferrite ring, and a secondary coil. The system transmitter emitted a series of exponentially decaying electromagnetic sine waves (continuous exposure with pulsed peaks) in randomly selected frequencies between 150 and 155 kHz, with random exposure intensities between 4 and 7 mG. Clinical investigations included multislice computed tomography of the aortic roots. Pathological examinations of the aortas included histological characterization, and antigen expression analyses. RESULTS: No calcification was found in either group of rats with normal kidney function. Aortic root calcification was significantly higher in rats exposed to EMF (group 3) compared with group 4 rats - with a mean Agatston score of 138 ± 25 vs. 80 ± 20 respectively (p<0.05). Pathological examination showed massive aortic calcification in group 3 rats. The calcification pattern was unique as it formed circular rings along the length of the aortic media. Although increased calcification was noticed in group 3 rats, antigen expression of osteoblast markers was significantly decreased in group 3 compared with group 4. CONCLUSIONS: EMF exposure may have potential harmful effects on the cardiovascular system, as it promotes severe vascular calcification in CKD miliue.
Assuntos
Campos Eletromagnéticos/efeitos adversos , Insuficiência Renal Crônica/complicações , Calcificação Vascular/etiologia , Animais , Valva Aórtica/metabolismo , Valva Aórtica/patologia , Subunidade alfa 1 de Fator de Ligação ao Core/metabolismo , Modelos Animais de Doenças , Feminino , Testes de Função Renal , Osteopontina/metabolismo , Ratos Sprague-Dawley , Insuficiência Renal Crônica/metabolismo , Insuficiência Renal Crônica/patologia , Índice de Gravidade de Doença , Calcificação Vascular/metabolismo , Calcificação Vascular/patologiaRESUMO
There is an abundant literature on the adverse effects of solvents on the neurobehavioral performance, higher brain functions, and chronic solvent-induced encephalopathy. However, the occurrence of solvent-related schizophrenia is rare, with few reports on the link between solvent exposure and schizophrenia. Here, we report on a patient with schizophrenia, presenting after a sustained period of 6 months of everyday exposure to neurotoxic solvents in an unprotected occupational setting in Haifa, Israel. In light of the similarity of symptoms of schizophrenia and chronic solvent encephalopathy, we call for further epidemiologic studies to examine the potential contribution of solvent exposure to the etiology and evolution of schizophrenia in selected cases. This case study and review of relevant literature underscores the importance of obtaining detailed histories on occupational exposures to search for agents which can trigger psychotic episodes. In the meantime, policies to prevent such exposures at the source can be expected to contribute to the prevention of a non-trivial proportion of neurotoxic diseases, including, possibly, schizophrenia in worker populations.