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Grant, D. N., Cozad, M. J., Grant, D. a., White, R. a., & Grant, S. a. (2014). In vitro electromagnetic stimulation to enhance cell proliferation in extracellular matrix constructs with and without metallic nanoparticles. Journal of Biomedical Materials Research Part B: Applied Biomaterials, , n/a-n/a.
Keywords: 2014; and without metallic nanoparticles; article; cozad mj; electromagnetic stimulation; enhance cell proliferation in; extracellular matrix constructs with; gold nanoparticles; grant da; grant dn; grant sa; how to cite this; in vitro assay; in vitro electromagnetic stimulation; j biomed mater res; part; tissue constructs; to; white ra
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Grellier, J., Ravazzani, P., & Cardis, E. (2014). Potential health impacts of residential exposures to extremely low frequency magnetic fields in Europe. Environ Int, 62, 55–63.
Abstract: Over the last two decades residential exposure to extremely low frequency magnetic fields (ELF MF) has been associated with childhood leukaemia relatively consistently in epidemiological studies, though causality is still under investigation. We aimed to estimate the cases of childhood leukaemia that might be attributable to exposure to ELF MF in the European Union (EU27), if the associations seen in epidemiological studies were causal. We estimated distributions of ELF MF exposure using studies identified in the existing literature. Individual distributions of exposure were integrated using a probabilistic mixture distribution approach. Exposure-response functions were estimated from the most recently published pooled analysis of epidemiological data. Probabilistic simulation was used to estimate population attributable fractions (AFP) and attributable cases of childhood leukaemia in the EU27. By assigning the literature review-based exposure distribution to all EU27 countries, we estimated the total annual number of cases of leukaemia attributable to ELF MF at between ~50 (95% CIs: -14, 132) and ~60 (95% CIs: -9, 610), depending on whether exposure-response was modelled categorically or continuously, respectively, for a non-threshold effect. This corresponds to between ~1.5% and ~2.0% of all incident cases of childhood leukaemia occurring annually in the EU27. Considerable uncertainties are due to scarce data on exposure and the choice of exposure-response model, demonstrating the importance of further research into better understanding mechanisms of the potential association between ELF MF exposure and childhood leukaemia and the need for improved monitoring of residential exposures to ELF MF in Europe.
Keywords: Child; *Environmental Exposure; Epidemiologic Studies; Europe; Humans; Leukemia/epidemiology/etiology; Magnetic Fields/*adverse effects; Cancer; Childhood leukaemia; Electromagnetic fields; Low frequency; Magnetic fields; Risk assessment
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Guerra, P. A., Gegear, R. J., & Reppert, S. M. (2014). A magnetic compass aids monarch butterfly migration. Nat Commun, 5, 4164.
Abstract: Convincing evidence that migrant monarch butterflies (Danaus plexippus) use a magnetic compass to aid their fall migration has been lacking from the spectacular navigational capabilities of this species. Here we use flight simulator studies to show that migrants indeed possess an inclination magnetic compass to help direct their flight equatorward in the fall. The use of this inclination compass is light-dependent utilizing ultraviolet-A/blue light between 380 and 420 nm. Notably, the significance of light <420 nm for inclination compass function was not considered in previous monarch studies. The antennae are important for the inclination compass because they appear to contain light-sensitive magnetosensors. For migratory monarchs, the inclination compass may serve as an important orientation mechanism when directional daylight cues are unavailable and may also augment time-compensated sun compass orientation for appropriate directionality throughout the migration.
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Hafizi, L., Sazgarnia, A., Mousavifar, N., Karimi, M., Ghorbani, S., Kazemi, M. R., et al. (2014). The effect of extremely low frequency pulsed electromagnetic field on in vitro fertilization success rate in N MRI mice. Cell J, 15(4), 310–315.
Abstract: OBJECTIVE: The effects of exposure to electromagnetic fields (EMF) on reproduction systems have been widely debated. In this study, we aimed to investigate whether low frequency EMF could ameliorate the in vitro fertilization success rate in Naval medical research institute (NMRI) Mice. MATERIALS AND METHODS: In this randomized comparative animal study, ten NMRI mice were randomly divided into 2 equal groups (control and experimental). 10 IU of human chorionic gonadotropin (hCG) was injected intraperitoneally to both groups in order to stimulate ovulating, and ovums were then aspirated and kept in KSOM (modified version of sequential simplex optimization medium with a higher K(+) concentration) culture medium. Metaphase II ovums were separated, and sperms obtained by “swim out” method were added to metaphase II ovums in the culture medium. The experimental group was exposed to 1.3 millitesla pulsed electromagnetic field at 4 kilohertz frequency for 5 hours. To assess the efficacy, we considered the identification of two-pronuclear zygote (2PN) under microscope as fertilizing criterion. RESULTS: Total number of collected ovums in the control and experimental groups was 191 and 173, respectively, from which 58 (30.05%) and 52 (30.36%) ovums were collected from metaphase II, respectively. In vitro fertilization (IVF) success rate was 77% in extremely low frequency- pulsed electromagnetic field (ELFPEMF) for exposed group (experimental), whereas the rate was 68% for control group. CONCLUSION: Despite increased percentile of IVF success rate in exposed group, there was no statistically significant difference between 2 groups, but this hypothesis has still been stated as a question. Further studies with larger sample sizes and different EMF designs are suggested.
Keywords: Electromagnetic Fields; In Vitro Fertilization; Mice
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Hauer, J., Borkhardt, A., Sanchez-Garcia, I., & Cobaleda, C. (2014). Genetically engineered mouse models of human B-cell precursor leukemias. Cell Cycle, 13(18), 2836–2846.
Abstract: B-cell precursor acute lymphoblastic leukemias (pB-ALLs) are the most frequent type of malignancies of the childhood, and also affect an important proportion of adult patients. In spite of their apparent homogeneity, pB-ALL comprises a group of diseases very different both clinically and pathologically, and with very diverse outcomes as a consequence of their biology, and underlying molecular alterations. Their understanding (as a prerequisite for their cure) will require a sustained multidisciplinary effort from professionals coming from many different fields. Among all the available tools for pB-ALL research, the use of animal models stands, as of today, as the most powerful approach, not only for the understanding of the origin and evolution of the disease, but also for the development of new therapies. In this review we go over the most relevant (historically, technically or biologically) genetically engineered mouse models (GEMMs) of human pB-ALLs that have been generated over the last 20 years. Our final aim is to outline the most relevant guidelines that should be followed to generate an “ideal” animal model that could become a standard for the study of human pB-ALL leukemia, and which could be shared among research groups and drug development companies in order to unify criteria for studies like drug testing, analysis of the influence of environmental risk factors, or studying the role of both low-penetrance mutations and cancer susceptibility alterations.
Keywords: B-precursor leukemia; Bcr-Abl; CLP, common lymphoid progenitor; GEMM, genetically engineered mouse model; LIC, leukemia-initiating cell; Mll; ROS, reactive oxygen species.; Tel-Aml1; mouse models; pB-ALL; pB-ALL, preB-Acute lymphoblastic leukemia
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