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AUTHORS' ABSTRACT: Zhang et al. 2016 (IEEE #6515): Temperature is an important factor in research on the biological effects of extremely low-frequency
electromagnetic field (ELF-EMF), but interactions between ELF-EMF and temperature
remain unknown. The effects of ELF-EMF (50 Hz, 3 mT) on the lifespan, locomotion,
heat shock response (HSR), and oxidative stress (OS) of Canton-Special (CS) andmutant
w1118 flies were investigated at 25°C and 35°C (thermal stress). Results showed that thermal
stress accelerated the death rates of CS and w1118 flies, shortened their lifespan, and
influenced their locomotion rhythm and activity. The upregulated expression levels of heat
shock protein (HSP) 22, HSP26, and HSP70 indicated that HSR was enhanced. Thermal
stress-inducedOS response increased malondialdehyde content, enhanced superoxide
dismutase activity, and decreased reactive oxygen species level. The effects of thermal
stress on the death rates, lifespan, locomotion, and HSP gene expression of flies, especially
w1118 line, were also enhanced by ELF-EMF. In conclusion, thermal stress weakened the
physiological function and promoted the HSR and OS of flies. ELF-EMF aggravated damages
and enhanced thermal stress-induced HSP and OS response. Therefore, thermal
stress and ELF-EMF elicited a synergistic effect.
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