Corticosterone acts within the brain to stimulate alcohol consumption in the rat. The experiments reported here were aimed at identifying where in the brain corticosterone acts to facilitate ethanol drinking. The daily fluid intake of male Wistar rats with simultaneous access to 6% ethanol and water was determined during a 1-week pre-operative baseline period and following implantation of corti...

Glucocorticoid hormones, via activation of their receptors, promote memory consolidation, but the exact underlying mechanisms remain elusive. We examined how corticosterone regulates AMPA receptors (AMPARs), which are crucial for synaptic plasticity and memory formation. Combining a live imaging fluorescent recovery after photobleaching approach with the use of the pH-sensitive GFP-AMPAR taggin...

Seabird productivity is shaped by marine resource availability. We examined the link between seabird productivity and an indirect measure of food availability: baseline plasma corticosterone. We predicted low productivity would coincide with elevated baseline corticosterone levels in Black-legged Kittiwakes (Rissa tridactyla). During a 5-year period of declining Kittiwake productivity in Chinia...

The aim of this study was to investigate the effect of acute swimming stress on plasma corticosterone and leptin levels in female and male rats. Thirty- seven adult male (n=20) and female (n=20) Sprague Dawley rats (200-250 g weight) were used. The leptin and corticosterone levels were measured following swimming stress (10 minutes) or no stress. Plasma leptin and corticosterone were measured b...

Corticosterone may nongenomically affect cell functions in addition to its well-characterized effects on gene expression. The purpose of this study is to examine if corticosterone has a rapid nongenomic effect on excitability of dorsal root ganglion neurons by using patch-clamp and single-cell Ca(2+) microfluometry techniques. The results show that corticosterone has a dose-dependent rapid inhi...

Developing animals may face a cost-benefit tradeoff during growth mediated through hormones such as glucocorticoids, as the hormone is essential for development but can have detrimental consequences. To investigate potential tradeoffs caused by brief, moderate elevations of corticosterone in avian young, we artificially elevated the hormone levels in two ways: feeding corticosterone-containing ...

Although differences in the corticosterone stress response have frequently been reported between populations or closely related subspecies, their origin remains unclear. These differences may appear because individuals adjust their corticosterone stress response to the environmental conditions they are experiencing. However, they may also result from selection that has favoured individuals with...

introduction: depression is one of the most frequent psychiatric disorders in the world with occurs with higher incidence in women. in the present study, the effect of water-alcoholic extract of papaver rhoeas l. on forced swimming test (fst) in swiss-webster mice were examined. methods: we used swiss-webster mice (20-25 g) to execute fst on them. the plant extract (1, 10, 30, and 100 mg/kg) wa...