Gino Malvaldi

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The lentivirus feline immunodeficiency virus (FIV) is a widespread pathogen of the domestic cat that is mainly transmitted through bites, although other means of transmission are also possible. Its prevalence ranges from 1 to 10% in different cat populations throughout the world, thus representing a large reservoir of naturally infected animals. FIV(More)
Elevation of serum gamma-glutamyltransferase (GGT) activity is a risk factor for myocardial infarction and stroke. GGT activity can catalyze the oxidation of low-density lipoprotein (LDL), a process involved in the pathogenesis of atherosclerosis. Serum GGT is partially adsorbed onto circulating LDL, and catalytically active GGT has been found within(More)
In this study, we describe for the first time the occurrence, within the central nervous system of the rat, of a dehydroascorbate reductase analogous to the one we recently described in the liver. Dehydroascorbate reductase plays a pivotal role in regenerating ascorbic acid from its oxidation product, dehydroascorbate. In a first set of experiments, we(More)
Renal tissues from 15 cats naturally infected with feline immunodeficiency virus (FIV) were examined histologically, immunohistochemically and ultrastructurally. Renal function and urinary proteins were also studied. Kidney abnormalities were found in 12 cats and were characterized by mesangial widening with segmental to diffuse glomerulosclerosis and(More)
Doxorubicin (DXR), an anthracycline antineoplastic drug, is mainly metabolized to the C-13 dihydroderivative doxorubicinol (DXR-ol), which displays cytotoxic activity on various cell lines. To better characterize the cytotoxic activity of this metabolite, we have studied the effect of DXR (0.1-10 micrograms/ml) or DXR-ol (1-100 micrograms/ml) on the(More)
To verify whether a mild, but prolonged liver injury by chemicals needing bioactivation causes both hepatic cirrhosis and the appearance of hepatocyte nodules and tumors (providing the liver has been exposed previously to initiating stimuli), diethylnitrosamine-initiated and uninitiated rats were administered thioacetamide at low dose (250 mg/l drinking(More)
Because abnormalities in redox balance cluster in type I diabetes families and the intracellular thiol redox status seems to modulate immune function, we aimed to investigate the relationship between oxidative stress and immunological features. We measured oxidative markers, serum proinflammatory cytokines, soluble cytokine receptors and subsets of(More)
Administration of thiobenzamide (TB) (0.18 mmol/100 g b.w.) to rats caused the appearance in serum and urine of a compound identified as thiobenzamide-S-oxide. When synthesized and given by oral administration, this compound induced the early appearance of liver centrilobular necrosis, impairment of glucose-6-phosphatase and aminopyrine demethylase(More)
Administration of thiobenzamide in a single dose (25 mg/100 g body wt by stomach tube) to male rats induced centrilobular necrosis, which became evident 10 h after the poisoning. In the meantime liver weight and water content underwent changes, glycogen was lost, triglycerides accumulated in the liver while decreasing in serum, [3H] leucine uptake in(More)