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Y Yamashita et al.
Mutation research, 348(4), 163-168 (1995-12-01)
N-Nitrosodialkylamines are promutagens and proclastogens, requiring metabolic activation for their actions. Previously, we showed that direct-acting bacterial mutagens can be formed from N-nitrosodialkylamines on exposure to near-UV. We have now found that N-nitrosodialkylamines with near-UV irradiation are clastogenic to Chinese
P Levallois et al.
Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 38(11), 1013-1019 (2000-10-19)
Urinary excretion of volatile nitrosamines was assessed in 59 non-smokers living in a rural county of Québec, Canada. Water and food intakes were measured by means of a 24-hour recall. Nitrates were analyzed in the tap water of all participants
Kinetics of the oxidation of N-aminopiperidine with chloramine
Darwich.Ch, et al.
Kinetics and Catalysis, 50(1), 103-110 (2009)
N-Nitrosopiperidine.
Report on carcinogens : carcinogen profiles, 10, 186-187 (2004-08-27)
Kun Lin et al.
International journal of cancer, 102(3), 207-211 (2002-10-25)
We assessed the exposure of total N-nitroso compounds (TNOCs) in the inhabitants of high- and low-risk areas for esophageal cancer in southern China. Samples of 24 hr diet and 12 hr overnight urine were collected from 120 male adults in
Cristina Ripollés et al.
Analytica chimica acta, 702(1), 62-71 (2011-08-09)
In this work, we have developed a sensitive method for detection and quantification of eight N-nitrosamines, N-nitrosodimethylamine (NDMA), N-nitrosomorpholine (NMor), N-nitrosomethylethylamine (NMEA), N-nitrosopirrolidine (NPyr), N-nitrosodiethylamine (NDEA), N-nitrosopiperidine (NPip), N-nitroso-n-dipropylamine (NDPA) and N-nitrosodi-n-butylamine (NDBA) in drinking water. The method is based
N-Nitrosamines (15 listings): N-Nitrosopiperidine.
Report on carcinogens : carcinogen profiles, 12, 321-322 (2011-08-24)
Hansen L Wong et al.
Carcinogenesis, 24(2), 291-300 (2003-02-14)
N-nitrosopiperidine (NPIP) is a potent esophageal carcinogen in rats whereas structurally similar N-nitrosopyrrolidine (NPYR) induces liver, but not esophageal tumors. NPIP is a possible causative agent for human esophageal cancer. Our goal is to explain mechanistically these differing carcinogenic activities
Hansen L Wong et al.
Chemical research in toxicology, 18(1), 61-69 (2005-01-18)
N'-Nitrosonornicotine (NNN) and N-nitrosopiperidine (NPIP) are potent esophageal and nasal cavity carcinogens in rats and pulmonary carcinogens in mice. N-Nitrosopyrrolidine (NPYR) induces mainly liver tumors in rats and is a weak pulmonary carcinogen in mice. These nitrosamines may be causative
A García et al.
Chemico-biological interactions, 173(1), 9-18 (2008-03-15)
The aim of this study was to investigate the protective effects of organosulfur compounds (OSCs) alone or in combination with vitamin C towards N-nitrosopiperidine (NPIP) and N-nitrosodibutylamine (NDBA)-induced oxidative DNA damage in the single cell gel electrophoresis (SCGE)/HepG2 assay. Diallyl
Almudena García et al.
Journal of applied toxicology : JAT, 29(5), 403-413 (2009-03-21)
The aim of this work was to determine the effect of vitamin C, diallyl disulfide (DADS) and dipropyl disulfide (DPDS) towards N-nitrosopiperidine (NPIP) and N-nitrosodibutylamine (NDBA)-induced apoptosis in human leukemia (HL-60) and hepatoma (HepG2) cell lines using the terminal deoxynucleotidyl
Hansen L Wong et al.
Chemical research in toxicology, 16(10), 1298-1305 (2003-10-21)
N-Nitrosopiperidine (NPIP) is a potent rat nasal carcinogen whereas N-nitrosopyrrolidine (NPYR), a hepatic carcinogen, is weakly carcinogenic in the nose. NPIP and NPYR may be causative agents in human cancer. P450-catalyzed alpha-hydroxylation is the key activation pathway by which these
Nuria Arranz et al.
Toxicology in vitro : an international journal published in association with BIBRA, 21(7), 1311-1317 (2007-05-22)
The aim of this study was to investigate the protective effect of vitamin C towards N-nitrosamine-induced DNA damage in the single-cell gel electrophoresis (SCGE)/HepG2 assay. None of the vitamin C concentrations tested (1-10 microM) in presence or absence of formamidopyrimidine-DNA
N-Nitrosopiperidine.
Report on carcinogens : carcinogen profiles, 11, III206-III207 (2004-01-01)
Jessica M Boyd et al.
Analytica chimica acta, 615(1), 80-87 (2008-04-29)
A cell-microelectronic sensing technique is developed for profiling chemical cytotoxicity and is used to study different cytotoxic effects of the same class chemicals using nitrosamines as examples. This technique uses three human cell lines (T24 bladder, HepG2 liver, and A549
Kinetics of the oxidation of N-aminopiperidine with chloramine
Darwich.Ch, et al.
Kinetics and Catalysis, 50, 103-110 (2009)
Samuel González-Mancebo et al.
Mutation research, 558(1-2), 45-51 (2004-03-24)
The genotoxicity of nitrosopiperidine and six alkyl derivatives was studied by use of the Ames tester strains TA100 and TA1535 in the pre-incubation method. Among the compounds investigated, those exhibiting genotoxic activity under the experimental conditions employed were only genotoxic
Almudena García et al.
Journal of applied toxicology : JAT, 28(4), 455-465 (2007-10-12)
N-nitrosopiperidine (NPIP) and N-nitrosodibutylamine (NDBA) belong to a group of N-nitrosamines that are widely distributed in foodstuffs and the occupational environment. In the present study, the human promyelocytic leukemia cell line HL-60, was used to characterize the apoptotic effects of
Dennie G A J Hebels et al.
Toxicology letters, 207(3), 232-241 (2011-09-29)
N-nitroso compounds (NOCs) may represent a carcinogenic risk to humans following endogenous colonic nitrosation processes. We used the colon adenocarcinoma cell line Caco-2 to investigate transcriptomic changes at three time points (1, 6, 24 h) following exposure to genotoxic concentrations
Almudena García et al.
Journal of applied toxicology : JAT, 28(2), 196-204 (2007-06-22)
The aim of this study was to investigate the protective effect of isothiocyanates alone or in combination with vitamin C towards N-nitrosodibutylamine (NDBA) or N-nitrosopiperidine (NPIP)-induced oxidative DNA damage in the single cell gel electrophoresis (SCGE)/HepG2 assay. Phenethyl isothiocyanate (PEITC)
Zhong-Ying Shen et al.
Zhonghua shi yan he lin chuang bing du xue za zhi = Zhonghua shiyan he linchuang bingduxue zazhi = Chinese journal of experimental and clinical virology, 20(2), 81-83 (2006-07-04)
Study on the promotive effects of N-nitrosopiperidine on carcinogenesis process was performed, based on the immortalization of human fetal esophageal epithelium induced by human papillomavirus (HPV) 18E6E7 genes. The immortalized esophageal epithelium SHEE was induced by HPV18E6E7. The cells at
F Catterall et al.
Mutagenesis, 13(6), 631-636 (1998-12-23)
Theafulvins were isolated from black tea aqueous infusions and their antimutagenic activity was evaluated against a number of food carcinogens. Theafulvins gave rise to a concentration-dependent inhibition of the mutagenicity of 2-amino-3-methylimidazo-[4,5-f]quinoline, 2-amino-1-methyl-6-phenylimidazo[4,5-b]pyridine, benzo[a]pyrene, 7,12-dimethylbenz[a]anthracene, nitrosopyrrolidine and nitrosopiperidine, but, in
Tiffany H Seyler et al.
Journal of analytical toxicology, 37(4), 195-202 (2013-03-20)
A sensitive and selective method was developed and validated to detect six volatile nitrosamines (N-nitrosodimethylamine, N-nitrosomethylethylamine, N-nitrosodiethylamine, N-nitrosopiperidine, N-nitrosopyrrolidine and N-nitrosomorpholine) in human urine. This method uses a liquid-liquid extraction cartridge followed by analysis with gas chromatography-tandem mass spectrometry (GC-MS-MS)
I T Vermeer et al.
Mutation research, 428(1-2), 353-361 (1999-10-13)
Many constituents present in the human diet may inhibit endogenous formation of N-nitroso compounds (NOC). Studies with human volunteers showed inhibiting effects of intake of ascorbic acid and green tea consumption on nitrosation using the N-nitrosoproline test. The aim of
M E Delgado et al.
Toxicology in vitro : an international journal published in association with BIBRA, 23(7), 1292-1297 (2009-07-25)
The aim of this study was to investigate the protective effect of myricetin, quercetin, (+)-catechin and (-)-epicatechin, against N-nitrosodibutylamine (NDBA) and N-nitrosopiperidine (NPIP)-induced DNA damage in human hepatoma cells (HepG2). DNA damage (strand breaks and oxidized purines/pyrimidines) was evaluated by
Almudena García et al.
Cell biology international, 33(12), 1280-1286 (2009-09-15)
The human hepatoma cell line (HepG2) exhibited a dose and time-dependent apoptotic response following treatment with N-Nitrosopiperidine (NPIP) and N-Nitrosodibutylamine (NDBA), two recognized human carcinogens. Our results showed a significant apoptotic cell death (95%) after 24h treatment with NDBA (3.5
Xiao-Yuan Xie et al.
Biochemistry and cell biology = Biochimie et biologie cellulaire, 88(4), 775-782 (2010-07-24)
The aim of this study was to explore the histogenesis and carcinogenesis of pulmonary cancer induced by N-nitrosopiperidine (NPIP) in mice. NPIP is a form of N-nitrosamine found in tobacco smoke, which has been shown to be a genotoxic chemical
D Guyonnet et al.
Mutation research, 466(1), 17-26 (2001-02-07)
The effects of in vivo administration of naturally occurring organosulfur compounds (OSCs) from Allium species were studied on the activation of several mutagens. Male SPF Wistar rats were given p.o. one of either diallyl sulfide (DAS), diallyl disulfide (DADS), dipropyl
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