Abstract
Garlic is a folk medicine known for its multiple physiological activities, but the neuro-modulatory effect of garlic against psychological stress has rarely been explored. The current study was conducted to determine the potential antipsychological stress effect of low temperature-aged garlic (LTAG). After acute restraint stress exposure, mice were administered with raw garlic (RG, 500 mg/kg, p.o.) or LTAG (500 mg/kg, p.o.). We investigated corticosterone, cortisol, and monoamines levels, and the mRNA expression of genes relevant to oxidative stress. RG and LTAG treatment significantly decreased stress-related hormones such as corticotropin-releasing factor, adrenocorticotropic hormone, corticosterone, and cortisol. Moreover, RG and LTAG administration significantly restored acute restraint stress-induced changes in concentrations of brain neurotransmitters (serotonin, norepinephrine, dopamine, and epinephrine). In addition, RG and LTAG improved the antioxidant defense system by causing an increase in mRNA expression of superoxide dismutase, catalase, and glutathione peroxidase in the brain. This study suggests an antipsychological stress and neuroprotective effect of RG and LTAG under stress conditions.
Published Version
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