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In the present study, we have evaluated whether melatonin (MEL) modulates Mn-induced decrease in spontaneous motor activity (SMA) and lipid peroxidation, estimated as malondialdehyde (MDA) formation, in several brain regions. In mice treated with manganese a decrease in SMA after 2 weeks of treatment was observed. In the group treated with Mn+MEL a significant greater reduction in SMA was detected...
When mice infected with the Venezuelan equine encephalomyelitis (VEE) virus were exposed to 2500 lux with a 12 h light: 12 h dark photoperiod, the serum levels of melatonin (MLT) remained constantly elevated. In mice exposed to 400 lux low levels of serum MLT were detected during the day and high levels during the night. An increase in the survival rate of the infected mice from 6 to 13 days after...
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