Výsledky vyhledávání - "Brigitte Pignatelli"

Helicobacter pylori eradication attenuates oxidative stress in human gastric mucosa

Autor: Shinya Toyokuni, M Plummer, Brigitte Pignatelli, L M Patricot, Brigitte Bancel, Hiroshi Ohshima

Publikováno v: The American Journal of Gastroenterology. 96:1758-1766

OBJECTIVE: Helicobacter pylori infection causes gastric diseases, but the responsible mechanisms are not completely understood. They can involve DNA and tissue damage induced by reactive oxygen and nitrogen species. Our aim is to investigate the effe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::610d0d01e7ba1392f5a18ea7c8c7b02e
https://doi.org/10.1111/j.1572-0241.2001.03869.x

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[Untitled]

Autor: Hiroshi Ohshima, Brigitte Pignatelli, Chun-Qi Li

Publikováno v: Digestive Diseases and Sciences. 46:836-844

In order to study the role of Helicobacter pylori infection in gastric carcinogenesis, we have measured oxidized (carbonyls) and nitrated (nitrotyrosine-containing) proteins as markers for oxidative and nitrative stress in 216 human gastric biopsies

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3547aaf50fb360f8c782f3c1b062abb1
https://doi.org/10.1023/a:1010764720524

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Formation of N-Nitrosamines and N-Nitramines by the Reaction of Secondary Amines with Peroxynitrite and Other Reactive Nitrogen Species: Comparison with Nitrotyrosine Formation

Autor: Mitsuharu Masuda, Hiroshi Ohshima, Marlin D. Friesen, Irena Celan, Hoyoku Nishino, Howard F. Mower, Brigitte Pignatelli

Publikováno v: Chemical Research in Toxicology. 13:301-308

Reactive nitrogen species, including nitrogen oxides (N(2)O(3) and N(2)O(4)), peroxynitrite (ONOO(-)), and nitryl chloride (NO(2)Cl), have been implicated as causes of inflammation and cancer. We studied reactions of secondary amines with peroxynitri

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8bcbbe447e7200e33ef40e0de2b793f3
https://doi.org/10.1021/tx990120o

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The effect of intra-gastric acidity and flora on the concentration of N-nitroso compounds in the stomach

Autor: J P Idström, David Armstrong, C. Cederberg, André L. Blum, Francesco Viani, Hans H. Siegrist, Brigitte Pignatelli, Elena F. Verdu, Michael Fried

Publikováno v: European Journal of Gastroenterology & Hepatology. 12:165-173

Correa's hypothesis proposes that gastric carcinogenesis is due to atrophic gastritis and hypochlorhydria which permit gastric bacterial colonization, the reduction of dietary nitrates to nitrites and the formation of potentially carcinogenic N-nitro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db1277ff9cb67fe412082116f4a7de29
https://doi.org/10.1097/00042737-200012020-00006

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[Untitled]

Autor: Brigitte Pignatelli, Hiroshi Ohshima, Chun-Qi Li

Publikováno v: Digestive Diseases and Sciences. 45:55-62

The cagA-positive Helicobacter pylori strains are thought to be able to induce interleukin-8 expression and to be associated with gastroduodenal diseases. Inducible nitric oxide synthase (iNOS) may be involved in inflammatory pathogenesis. Our aim wa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::703fa820de195c62ec36497753c512d5
https://doi.org/10.1023/a:1005453125433

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Analysis of 3-Nitrotyrosine in Biological Fluids and Protein Hydrolyzates by High-Performance Liquid Chromatography Using a Postseparation, On-line Reduction Column and Electrochemical Detection: Results with Various Nitrating Agents

Autor: Irena Celan, Hiroshi Ohshima, Howard F. Mower, Laurence Chazotte, Brigitte Pignatelli

Publikováno v: Nitric Oxide. 3:132-141

Nitric oxide reacts rapidly with superoxide to form the strong nitrating agent peroxynitrite, which is responsible for much of the tissue damage associated with diverse pathophysiological conditions such as inflammation. The occurrence of free or pro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02f429044a49a469219f0bbd5b866772
https://doi.org/10.1006/niox.1999.0216

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Levels of direct-acting mutagens, total N-Nitroso compounds in nitrosated fermented fish products, consumed in a high-risk area for gastric cancer in southern China

Autor: Brigitte Pignatelli, R.F Zhang, C.S Chen, Helmut Bartsch, Christian Malaveille, Agnès Hautefeuille, David E. G. Shuker, G. Bouvier

Publikováno v: Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis. 265:211-221

A high gastric cancer mortality in Fujian province (Peoples Republic of China) has been associated with the consumption of certain salted fermented fish products such as fish sauce (FS). We have investigated the levels and nature of N-nitroso compoun

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef6c3f2466910fb9bf84f8cec3a6d605
https://doi.org/10.1016/0027-5107(92)90050-c

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Levels of nitrite, nitrate, N-nitroso compounds, ascorbic acid and total bile acids in gastric juice of patients with and without precancerous conditions of the stomach

Autor: Helmut Bartsch, Marion J Sanderson, R.F.G. King, G. M. Sobala, S. Shires, C J Schorah, Anthony T. R. Axon, Brigitte Pignatelli, Michael F. Dixon

Publikováno v: Carcinogenesis. 12:193-198

To determine the relevance of gastric juice factors to gastric carcinogenesis, 56 patients with unoperated stomachs undergoing endoscopy for dyspepsia had gastric juice aspirated and analysed for pH, ascorbic acid, total bile acids, nitrite, nitrate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b06c6488e5c1e36e5500b20888ee78cb
https://doi.org/10.1093/carcin/12.2.193

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Studies in gastric carcinogenesis. V. The effects of ascorbic acid on N-nitroso compound formation in human gastric juice in vivo and in vitro

Autor: J. Esteve, Soterios A. Kyrtopoulos, B. Golematis, Brigitte Pignatelli, G. Karkanias

Publikováno v: Carcinogenesis. 12:1371-1376

The concentrations of nitrite, thermo- and acetic acid-labile TEA-responsive compounds (TACs) and N-nitroso compounds (NOCs) as a group were measured in human gastric juice collected just before and 1, 2 and 4 h after oral ingestion of 1 g ascorbic a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93e1b87a0525e4c27da676c47a144172
https://doi.org/10.1093/carcin/12.8.1371

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Differences in oxidative stress dependence between gastric adenocarcinoma subtypes

Autor: Hiroshi Ohshima, Brigitte Bancel, Shinya Toyokuni, Brigitte Pignatelli, Jacques Estève, Jean-Christophe Souquet

Publikováno v: World Journal of Gastroenterology
World Journal of Gastroenterology, Baishideng Publishing Group Co. Limited, 2006, 12, pp.1005-1012
World Journal of Gastroenterology, 2006, 12, pp.1005-1012

AIM: To investigate the extent of oxidative stress in pre-neoplastic and neoplastic gastric mucosa in relation to their pathological criteria and histological subtypes. METHODS: A total of 104 gastric adenocarcinomas from 98 patients (88 infiltrative

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2f3dc32cce5847d1e63ffaa279f42f5
https://hal.archives-ouvertes.fr/hal-00427898

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