César Antonio Pereira

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A qualitative study by light and electron microscopy was undertaken on the liver of the brown trout, Salmo trutta fario. Vessels and bile ducts were observed to be scattered without any apparent order within the parenchyma. Venous profiles appeared either isolated or included in 'venous-arteriolar tracts' (VAT) and 'venous-biliary-arteriolar tracts' (VBAT).(More)
BACKGROUND A quantitative study was undertaken for the first time on the normal liver of male and female 2-year-old brown trout, Salmo trutta. METHODS Liver was fixed by controlled perfusion. Organ-level morphometry provided weight and volume. A two-stage stereological approach was performed at light and electron microscopy levels. Systematic sampling and(More)
The genetic and epigenetic alterations are being studied as one of the causes of gastric cancer (GC) progression and development. DNA methylation is an epigenetic alteration which leads to suppressor gene silencing and proto-oncogene activation, playing an important role in carcinogenesis. The histological types of gastric carcinoma have different genetic(More)
1. Since the development of resistance against mouse hepatitis virus (JHMV strain) coincides with the maturation of the immune system, we studied the possible role of distinct immunological components in the resistance of adult mice during JHMV infection. 2. Adult C3H mice naturally resistant to JHMV were rendered susceptible to infection by lethal(More)
Todas as correções determinadas pelo júri, e só essas, foram efetuadas. Acknowledges I would not finish this dissertation without the support and cooperation from many people through a variety of means. Foremost, it is my honour to express my genuine gratitude to my devoted supervisor, Dr. Lígia Tavares. Her support, patience and assistance allowed me to(More)
We determined the ability of a mixture of gangliosides (16% GD1b, 19% GT1b, 21% GM1, 40% GD1a) to neutralize the effect of Crotalus durissus terrificus (Cdt) venom in vitro and in vivo. Protection was indicated by the absence of muscular contractions, hind limb paralysis or death of BALB/c mice (16-18 g) after receiving Cdt venom (1 microgram Cdt venom(More)
Lead has been shown to produce cognitive and motor deficits in young rats that could be mediated, at least in part, by inhibition of the zinc-containing heme biosynthetic enzyme delta-aminolevulinate dehydratase (ALA-D). In the present study we investigated the effects of lead and/or zinc treatment during the second stage of rapid postnatal brain(More)
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