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The effects of various doses (40 microg/kg/hr, 300 microg/kg/hr, 600 microg/kg/hr or placebo) of hydrocortisone on tasks assessing working and declarative memory function were measured in 4 groups of 10 young men. During the infusion, participants were given an item-recognition working memory task, a paired-associate declarative memory task, and a(More)
A group of 14 healthy elderly subjects was submitted to a nonstressful (attentional task) and a stressful (public speaking task) condition. Declarative (conscious recollection of learned information) and nondeclarative (retrieved information without conscious or explicit access) memory as well as salivary cortisol levels were measured before and after each(More)
Corticotropin-releasing factor (CRF) and the related urocortin peptides mediate behavioral, cognitive, autonomic, neuroendocrine and immunologic responses to aversive stimuli by activating CRF(1) or CRF(2) receptors in the central nervous system and anterior pituitary. Markers of hyperactive central CRF systems, including CRF hypersecretion and abnormal(More)
Abnormal signaling at corticotropin-releasing factor CRF1 and CRF2 receptors might contribute to the pathophysiology of stress-related disorders such as anxiety, depression and eating disorders, in addition to cardiac and inflammatory disorders. Recently, molecular characterization of CRF1 and CRF2 receptors and the cloning of novel ligands--urocortin,(More)
Dysfunctioning of corticotropin-releasing hormone (CRH) and its receptors (CRH(1) and CRH(2)) has been linked to the development of stress-related disorders, such as mood and eating disorders. The molecular characterization of CRH(1) and CRH(2) receptors and their splice variants has generated detailed information on their pharmacology, tissue distribution(More)
Elevated glucocorticoid levels produce hippocampal dysfunction and correlate with individual deficits in spatial learning in aged rats. Previously we related persistent cortisol increases to memory impairments in elderly humans studied over five years. Here we demonstrate that aged humans with significant prolonged cortisol elevations showed reduced(More)
BACKGROUND Neuropeptide-Y (NPY) is present in extensive neuronal systems of the brain and is present in high concentrations in cell bodies and terminals in the amygdala. Preclinical studies have shown that injections of NPY into the central nucleus of the amygdala function as a central anxiolytic and buffer against the effects of stress. The objective of(More)
Receptors for corticotropin-releasing factor (CRF) are members of a family of G protein-coupled receptors ("Family B") that respond to a variety of structurally dissimilar releasing factors, neuropeptides, and hormones (including secretin, growth hormone-releasing factor, calcitonin, parathyroid hormone, pituitary adenylate cyclase-activating polypeptide,(More)
The goal of this study was to investigate the behavioral and subjective effects of a single dose of progesterone in men and women. Certain metabolites of progesterone (e.g., allopregnanolone) are potent positive allosteric modulators of GABA(A) receptors, and produce sedative-like effects in laboratory animals. This study was designed to examine the acute(More)
Specific receptors for corticotropin releasing factor (CRF) were identified in two functionally distinct systems within the brain, the cortex and the limbic system. Autoradiographic mapping of the CRF receptors in the brain revealed high binding density throughout the neocortex and cerebellar cortex, subiculum, lateral septum, olfactory tract, bed nucleus(More)