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Phenolics from grapes and wines can play a role against oxidation and development of atherosclerosis. Stilbenes have been shown to have cancer chemopreventive activity and to protect lipoproteins from oxidative damage. A method for the direct determination of stilbene oligomers (viniferin and pallidol) as well as astilbin in different types of wine using(More)
Most of the many epidemiological studies in the field strongly suggest that an equilibrated diet such as the so-called "mediterranean diet", is associated with protective effects against major diseases, and particularly, against cardiovascular risks. Since many reports also consider reactive oxygen species or free radical oxidations to be responsible(More)
A simple combined method for differential PAP labeling of fibronectin (FN) in mouse embryo fibroblast cultures was developed. Methanol-5% glacial acetic acid in dry ice-fixed cell monolayers showed mainly intracellular FN staining. Fixation with neutral paraformaldehyde before labeling, developed membrane- and extracellular matrix-associated FN. A(More)
This study aims to evaluate and compare the antiproliferative and proapoptotic effects of resveratrol (trans-3,4',5-trihydoxystilbene) with two of its naturally occurring oligomers, epsilon-viniferin (a dimer) and miyabenol C (a trimer). Proliferation assays performed on myeloid and lymphoid cell lines show that the three compounds inhibit cell growth of(More)
This study deals with a centrifugal partition chromatography developed for the separation of phenolic compounds from Vitis vinifera. EtOAc grape seed extracts were separated using the solvent system hexane-ethyl acetate-ethanol-water (1:8:2:7; v/v) in two fractions: one containing about 75% of flavanol monomers (catechin and epicatechin) corresponding to(More)
The elaboration of novel techniques for flavonoid intracellular tracing would elucidate the compounds' absorption and bioavailability and assist molecular and pharmacological approaches, as they are promising candidates for drug development. This study exploited the properties of quercetin (3,3',4',5,7-pentahydroxyflavone), found in high concentrations in(More)
The aim was to evaluate the effects of calphostin C (CC), a protein kinase C inhibitor, on lytic herpes simplex virus-type 1 infection of cultured rat astrocytes. At 24 h postinjection, the cell culture receiving CC treatment at 50 nM concentration showed decreased cell detachment and retraction versus untreated infected controls; likewise, the infective(More)
The present work reports a new mode of action of the naturally occurring flavanols catechin and epicatechin and their dimers B2 and B5, in the breast cancer T47D cell line, namely, their interaction with membrane androgen receptors. We show that monomeric and dimeric flavanols are complete (B2) or partial displacers of radiolabeled testosterone bound on(More)
Weanling inbred Balb/c mice were intraperitoneally inoculated with a myocarditic variant of coxsackievirus B3. At days 1, 2, 4, 6, 8, 10, 14, 24 and 30 post-infection (p.i.), myocardial tissue was harvested for viral infectivity titrations and histological studies, including routine techniques (haematoxylin-eosin, Masson trichrome and von Kossa) and(More)
In order to characterize viral kinetics and pathogenic properties of two intratypic variants of coxsackievirus B type 3, Balb/c mice were intraperitoneally inoculated and serial samples harvested from days 2 to 28. Although both CB3o (amyocarditic) and CB3m (myocarditic) variants induced similar early infectivity titres in pancreas, only the latter led to(More)