Annhymariet Torrellas

Learn More
Acute ethanol administration (2 g/kg IP) induced a significant rise in serum corticosterone levels which seemed to be related to blood ethanol concentration. Chronic ethanol administration, in the form of a liquid diet for 16 or 30 days, did not alter the levels of serum corticosterone. Chronic treatment of rats with a liquid diet containing ethanol(More)
The purpose of the present study was to investigate in rats, the effects of sound stimulation upon both the pituitary-adrenal activity (evaluated by the levels of serum corticosterone (B)) and brain dopamine (DA) and noradrenaline (NA). Serum B in rats placed inside the experimental chamber without any sound stimulation was increased and brain DA decreased.(More)
The aim of the present study was to investigate the effects of acute and chronic administration of morphine upon the pituitary-adrenal activity and adrenal catecholamines in rats and cats, two animal species with very different behavioural patterns of response to the opiate. Acute administration of the drug induced in both animal species an activation of(More)
Male rats were treated for 14 days with dexamethasone (2.6 mumol/l in the drinking water) and killed at various times after withdrawal of the drug. Some animals were subjected to stress (ether or sham adrenalectomy) just before killing. The recovery of responsiveness of the components of the hypothalamo-pituitary-adrenocortical axis was assessed by(More)
This study attempted to quantify the transmission of Trypanosoma cruzi in children less than 15 years of age in Barinas State, Venezuela and investigate risk factors for infection. Among 3,296 children, 4 (0.12%) were seropositive. The mother of one child also was also seropositive, which suggested that congenital transmission is a possible risk factor for(More)
The response of the pituitary-adrenal axis of the male rat to sub-chronic dose treatment with phenobarbital and/or phenytoin under basal and stress conditions was investigated. Plasma corticosterone levels were measured in rats sacrificed either in the morning or in the afternoon, subjected or not to 2 hours of immobilization stress. Phenobarbital did not(More)
Brain and adrenal catecholamine turnover in adult female rats treated with morphine was investigated. A different time course response of brain and adrenal catecholamines to alpha-methyl-p-tyrosine methyl-ester (AMT) administration in normal rats was observed; the catecholamine turnover rate in adrenal glands appeared to be much slower than in the brain.(More)
  • 1