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Lazze, Maria Claudia,Pizzala, Roberto,Pecharroman, Francisco Javier Gutierrez,Garnica, Paloma Gaton,Rodriguez, Juan Manuel Antolin,Fabris, Nicola,Bianchi, Livia The Korean Society of Food Science and Nutrition 2009 Journal of medicinal food Vol.12 No.3
Grape waste management is one of the main problems of winery industries, but, conversely, grape waste contains a high amount of polyphenols that might protect against human diseases related to oxidative stress, such as colorectal cancer. Therefore, the aim of this work was to investigate the antioxidant and antiproliferative activities of a grape waste extract obtained by supercritical fluid extraction. Because the beneficial effect of grape is related to its content of polyphenolic molecules, the extract was chemically characterized by high-performance liquid chromatography in order to assess its major bioactive components. The antioxidant activity of the grape extract was determined. The results showed that the grape extract presents a strong antiradical activity in the in vitro 2,2-diphenyl-1-picrylhydrazyl radical assay and protects against reactive oxygen species production in human colon adenocarcinoma cells (Caco-2). In contrast, the extract did not protect in the citronellal thermooxidation system and showed a weak protective action against lipid peroxidation in Caco-2 cells. The clonogenic assay and the cell cycle distribution analysis showed that the grape extract has a significant antiproliferative effect in a tumor cell line. These data indicate that grape extract is a promising product to be used as an anti-free radical agent and could exert a chemopreventive action.
Maria Claudia Lazzè,Roberto Pizzala,Francisco Javier Gutiérrez Pecharromán,Paloma Gatòn Garnica,Juan Manuel Antolín Rodríguez,Nicola Fabris,Livia Bianchi 한국식품영양과학회 2009 Journal of medicinal food Vol.12 No.3
Grape waste management is one of the main problems of winery industries, but, conversely, grape waste contains a high amount of polyphenols that might protect against human diseases related to oxidative stress, such as colorectal cancer. Therefore, the aim of this work was to investigate the antioxidant and antiproliferative activities of a grape waste extract obtained by supercritical fluid extraction. Because the beneficial effect of grape is related to its content of polyphenolic molecules, the extract was chemically characterized by high-performance liquid chromatography in order to assess its major bioactive components. The antioxidant activity of the grape extract was determined. The results showed that the grape extract presents a strong antiradical activity in the in vitro 2,2-diphenyl-1-picrylhydrazyl radical assay and protects against reactive oxygen species production in human colon adenocarcinoma cells (Caco-2). In contrast, the extract did not protect in the citronellal thermooxidation system and showed a weak protective action against lipid peroxidation in Caco-2 cells. The clonogenic assay and the cell cycle distribution analysis showed that the grape extract has a significant antiproliferative effect in a tumor cell line. These data indicate that grape extract is a promising product to be used as an anti-free radical agent and could exert a chemopreventive action.
Inés C. Oría,Juan E. Pizzala,Augusto M. Villaverde,Juan C. Spina,Analía V. Pasqua,Julio C. Lazarte,Oscar M. Mazza,Mariano M. Marcolongo 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.2
The pancreatoduodenal groove is a small area where pathologic processes involving the distal bile duct, duodenum, pancreatic head,ampulla of Vater, and retroperitoneum converge. Despite great advances in imaging techniques, a definitive preoperative diagnosis ischallenging because of the complex anatomy of this area. Therefore, surgical intervention is frequently required because of the inabilityto completely exclude malignancy. We report 3 cases of patients with different groove pathologies but similar clinical and imaging presentation, and show the essential roleof endoscopic ultrasound (EUS) in making a specific preoperative diagnosis, excluding malignancy in the first case, changing diagnosisin the second case, and confirming malignancy in the third case. EUS was a fundamental tool in this cohort of patients, not onlybecause of its ability to provide superior visualization of a diffcult anatomical region, but because of the ability to guide precise, realtimeprocedures, such as fine-needle aspiration.
Tania Coppa,Maria Claudia Lazzè,Ornella Cazzalini,Paola Perucca,Roberto Pizzala,Livia Bianchi,Lucia Anna Stivala,Luca Forti,Cristina Maccario,Vanio Vannini,Monica Savio 한국식품영양과학회 2011 Journal of medicinal food Vol.14 No.10
Resveratrol inhibits endothelin-1, a vascular tension regulator. We synthesized the resveratrol analogue 4,4′-dihydroxy-trans-stilbene with 2 hydroxyl groups in the 4 and 4′ position to obtain a molecule more active than resveratrol (3,4′,5-trihydroxy-trans-stilbene). The results demonstrate that 4,4′-dihydroxy-trans-stilbene led to a significant decrease in total endothelin-1 secretion and in endothelin-1 messenger RNA (mRNA) levels in human endothelial cells. In addition, resveratrol and its analogue decreased endothelin-converting enzyme-1 mRNA levels and further reduced the activity of the enzyme. 4,4′-dihydroxy-trans-stilbene was more active than resveratrol because the new molecule exerted greater activity at the level of endothelin synthesis and conversion, even at a lower concentration. Although 4,4′-dihydroxy-trans-stilbene and resveratrol inhibited formation of reactive oxygen species and lipid peroxidation, the treatment of cells with different oxidant agents did not modify the endothelin-1 release. This finding suggests that the inhibition of endothelin-1 secretion is independent of the antioxidant properties of the 2 compounds. On the basis of these results, the resveratrol analogue 4,4′-dihydroxy-trans-stilbene could be a promising chemopreventive agent against cardiovascular diseases.