BACKGROUND Serotonin and γ-aminobutyric acid (GABA) transmission is crucial in coping strategies. METHODS Here, using mice from 2 inbred strains widely exploited in behavioral neurochemistry, we investigated whether serotonin transmission in medial prefrontal cortex and GABA in basolateral amygdala determine strain-dependent liability to stress response and differences in coping. RESULTS C5...

Severe stress induces changes in neuronal function that are implicated in stress-related disorders such as depression. The molecular mechanisms underlying the response of the brain to stress remain primarily unknown, however. Signal regulatory protein alpha (SIRPalpha) is an Ig-superfamily protein that undergoes tyrosine phosphorylation and binds the protein tyrosine phosphatase Shp2. Here we s...

objective: rosa damascena mill l (r. damascena) is a medicinal plant mostly known in the world for its perfume. it also has beneficial effects on stress, tension and depression. in this experiment antidepressant effect of ethanolic extract of r. damascena by forced swimming test (fst) was evaluated. material and methods: animals received ethanolic extract (15, 60 and 90 mg/kg, i.p), imipramine ...

OBJECTIVE The anti-apoptotic protein Bax inhibitor-1 (BI-1) is a regulator of apoptosis linked to endoplasmic reticulum (ER) stress, and BI-1(-/-) mice exhibit increased sensitivity to tissue damage. The purpose of this study was to investigate the role of BI-1 in the pathogenesis of chronic mild stress (CMS)-induced depression-like behaviors in BI-1(-/-) mice. METHODS We delivered CMS for 2 ...

objective: rosa damascena mill l (r. damascena) is an ornamental plant that has several therapeutic (such as sedative and hypnotic) effects. it also heals depression, grief, nervous stress and tension. in the present study we evaluated antidepressant-like effect of r. damascena using forced swimming test (fst). material and methods: three doses of aqueous extract (15, 60 and 90 mg/kg) was injec...

the fruit of cassia fistula linn. is a legume, has antioxidant and lots of other medicinal properties. as oxidants are involved in the pathogenesis of chronic fatigue syndrome, the present study was done to evaluate the effect of ethanolic extract of fruit pulp of c. fistula linn. (eecf) on forced swimming induced chronic fatigue syndrome (cfs). albino mice of 25-40 grams were grouped into five...

Young (3-month-old) male Wistar rats showed a relative decrease in heart rate to a sudden silence superimposed on low intensity background noise. This bradycardia was accompanied by immobility behavior. In 26-month-old rats the magnitude of the heart rate response was reduced while immobility behavior remained in the same order of magnitude as in young controls. In the aged rats a shift in auto...

Many psychological disorders comprise a seasonal component. For instance, seasonal affective disorder (SAD) is characterized by depression during autumn and winter. Because hippocampal atrophy may underlie the symptoms of depression and depressive-like behaviors, one goal of this study was to determine whether short days also induce structural changes in the hippocampus using photoperiod respon...

Post-traumatic stress disorder (PTSD) is a chronic syndrome triggered by exposure to trauma and a failure to recover from a normal negative emotional reaction to traumatic stress. The neurobiology of PTSD and the participation of neuropeptides in the neural systems and circuits that control fear and anxiety are not fully understood. The long-term dysregulation of neuropeptide systems contribute...

BACKGROUND The prefrontal cortex plays a critical role in regulating emotional behaviors, and dysfunction of prefrontal cortex-dependent networks has been broadly implicated in mediating stress-induced behavioral disorders including major depressive disorder. METHODS Here we acquired multicircuit in vivo activity from eight cortical and limbic brain regions as mice were subjected to the tail ...