Results: 12

Acute Physical Stress Preconditions the Heart Against Ischemia/Reperfusion Injury Through Activation of Sympathetic Nervous System

Arq. bras. cardiol; 113 (3), 2019
Abstract Background: Stress is defined as a complicated state that related to homeostasis disturbances, over-activity of the sympathetic nervous system and hypothalamus-pituitary-adrenal axis responses. Cardiac preconditioning reduces myocardial damages. Objective: This study was designed to assess the...

Neurologic complications of HTLV-1: a review

Rev. bras. neurol; 55 (2), 2019
The human T-cell lymphotropic virus type 1 (HTLV-1) is a retrovirus that infects about 20 million people worldwide and causes immune-mediated diseases of the nervous system. The classical neurological presentation of HTLV-1 infection is the so-called HTLV-1-associated myelopathy/tropical spastic parapare...

Efeito da rutina em modelo de depressão crônico induzido por corticosterona em camundongos

Introdução: a depressão é uma doença altamente prevalente na população mundial e apesar de não ter sua causa estabelecida, algumas teorias tentam esclarecer sua etiologia. A rutina é um flavonoide pertencente à classe dos flavonóis, que tem propriedades anti-inflamatória e antioxidante. Objet...

Acute exercise inhibits gastric emptying of liquids in rats: influence of the NO-cGMP pathway

Braz. j. med. biol. res; 51 (11), 2018
We previously found that acute exercise inhibited the gastric emptying of liquid in awake rats by causing an acid-base imbalance. In the present study, we investigated the involvement of the nitric oxide-cyclic guanosine monophosphate (NO-cGMP) pathway, vasoactive intestinal peptide (VIP), and corticotro...

Gonadotrophic, prolactin, corticosterone, and gonadal hormones levels over 15 months in Giant Amazon River Turtles - Podocnemis expansa (Schweigger, 1812) (Testudines: Podocnemididae), in captive conditions

Braz. j. biol; 77 (2), 2017
Abstract In order to achieve successful captive breeding the Podocnemis expansa, it is necessary to study their reproductive endocrinology. The purpose of this research was to evaluate and characterize plasma concentrations in gonadotrophic, gonadic, corticosterone and prolactin hormones from Giant Amazo...

Social instigation and repeated aggressive confrontations in male Swiss mice: analysis of plasma corticosterone, CRF and BDNF levels in limbic brain areas

Abstract Introduction: Agonistic behaviors help to ensure survival, provide advantage in competition, and communicate social status. The resident-intruder paradigm, an animal model based on male intraspecific confrontations, can be an ethologically relevant tool to investigate the neurobiology of aggres...

Acute effects of restraint, shock and training in the elevated t-maze on noradrenaline and serotonin systems of the prefrontal cortex

Acta colomb. psicol; 17 (2), 2014
The prefrontal cortex (PFC) participates in cognitive functions and stress regulation. Noradrenaline (NA) and serotonin (5-HT) levels in some regions of the central nervous system are modified by acute stress. The effects depend on the type of stressor and the time elapsed between the presence of the str...

Dicofol e estresse: efeitos da exposição materna no desenvolvimento pré e pós-natal da prole de ratas

Os efeitos da exposição pré-natal ao praguicida organoclorado dicofol e ao estresse por contenção, como risco agregado, no desenvolvimento embriofetal e pós-natal da prole de ratas foram verificados no presente estudo. Foram utilizadas ratas Wistar prenhas que receberam as doses de 5, 10 ou 20 mg/k...

Açäo da betametasona em ratas prenhes: impacto sobre os níveis de corticosterona e glândulas adrenais maternas e fetais
Effect of betamethasone on pregnant rats: impact on corticosterone level and maternal and fetal adrenal glands

Objetivo: a utilizaçäo repetitiva do corticóide antenatal objetivando acelerar a maturidade pulmonar fetal tem sido muito empregada no risco de parto prematuro, o que nos motivou a estudar a dosagem de corticosterona no termo e aspectos morfológicos das glândulas adrenais maternas e fetais de ratas ...