María Alejandra Fernández

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This review addresses recent and not so recent works that emphasize on the mechanisms by which liver damage can induce encephalopathy. Hepatic encephalopathy constitutes an intriguing complication in severe liver acute and chronic disease, whose pathophysiology is still not completely understood. In this pathology, alterations in normal brain function are(More)
AIM To study glutamine synthetase (GS) activity and glutamate uptake in the hippocampus and frontal cortex (FC) from rats with prehepatic portal vein hypertension. METHODS Male Wistar rats were divided into sham-operated group and a portal hypertension (PH) group with a regulated stricture of the portal vein. Animals were sacrificed by decapitation 14 d(More)
AIM To study the blood-brain barrier integrity, brain edema, animal behavior and ammonia plasma levels in prehepatic portal hypertensive rats with and without acute liver intoxication. METHODS Adults male Wistar rats were divided into four groups. Group I: sham operation; II: Prehepatic portal hypertension, produced by partial portal vein ligation; III:(More)
AIM To evaluate the safety and efficacy of chronic administration of losartan on hepatic fibrosis in chronic hepatitis C patients. METHODS Fourteen patients with chronic hepatitis C non-responders (n = 10), with contraindications (n = 2) or lack of compliance (n = 2) to interferon plus ribavirin therapy and liver fibrosis were enrolled. Liver and renal(More)
INTRODUCTION Cholestasis leads to liver cell death, fibrosis, cirrhosis, and eventually liver failure. Bile duct ligated rats constitute an interesting model to study the mechanism of cholestasis, and its action on several organs and tissues, including the brain. AIM To analyze brain bile acids individually in ligated rats to evaluate if its profile is(More)
1. The aim of the present study was to assess whether protection afforded by the Na(+)/H(+) exchanger blocker dimethylamiloride (DMA) is associated with inhibition of mitochondrial permeability transition (MPT). The effects of DMA were compared with those of cyclosporine (Cs) A, an inhibitor of MPT. 2. Rat hearts were Langendorff perfused with(More)
Lipoproteins are synthesized by the liver and secreted to plasma. Chronic alcoholic intoxication produces frequently cirrhosis and concomitantly alterations in liver metabolism. Thirty patients with alcoholic cirrhosis and 83 healthy controls were selected for this study. Apolipoprotein A1, B100, lecithin cholesterol acyltransferase, responsible for(More)
The damage to plantations by pests is often determined by perceptions rather than objective data, resulting in excessive use of pesticides. Leafcutter ants are considered important pests to plantations in America. We evaluated the difference in Pinus taeda biomass consumption by four Acromyrmex leafcutter ant species which co-inhabit plantations of this(More)
The STO-BANG questionnaire, S standing for snore, T tired, O observed apneas, P pressure (arterial hypertension), B BMI (body mass index > 35 kg/ m2), A age (> 50 years old), N neck circumference (> 40 cm), G gender (male); is a simple tool that enables the detection of patients with obstructive sleep apnea syndrome (OSA). If the patient adds 3 or more(More)
Twelve cases of Reye's syndrome are presented with different degrees of encephalopathy, hyperammonemia and hypoglycemia; associated to acetyl salicylic acid (ASA) ingestion. The aim of the present retrospective study was to describe our experience in selected patients with Reye's syndrome associated to the ASA ingestion and to underline the influence of(More)