scholarly journals Effects of Flue-curing on Cigarette Smoke Condensates Mutagenicity

2010 ◽  
Vol 24 (2) ◽  
pp. 72-77
Author(s):  
A Morin ◽  
N Poirier ◽  
D Prefontaine ◽  
M Lacasse
Keyword(s):  
Salmonella Typhimurium ◽  
Cigarette Smoke ◽  
Tobacco Smoke ◽  
Ames Test ◽  
Chemical Properties ◽  
Metabolic Activation ◽  
Leaf Chemistry ◽  
Cigarette Smoke Condensate ◽  
Tobacco Leaves ◽  
Reverse Mutation

AbstractFlue-curing is a post harvest conditioning process which strongly affects the tobacco leaf chemistry, and consequently the chemical properties of tobacco smoke. Several studies identified the major changes in tobacco chemistry occurring during flue-curing. It is not known how flue-curing contributes to changes in bioactivity of cigarette smoke condensate (CSC). In this study, tobacco leaves collected throughout the twelve days of flue-curing were used to prepare cigarettes that were smoked to generate CSC samples. The assessment of mutagenicity was performed using the Bacterial Reverse Mutation / Ames test with Salmonella typhimurium TA98 in the presence of S9 metabolic activation. CSC from cured leaves were significantly more mutagenic than CSC from uncured leaves. The number of revertants was positively influenced by the duration of the curing. The effect of the duration of curing on the number of revertants was more pronounced with increasing CSC concentration.

Evaluation of the Genotoxicity of Extracts of Houttuynia cordata Thunb.

2012 ◽  
Vol 40 (05) ◽  
pp. 1019-1032 ◽  
Author(s):  
Chang Keun Kang ◽  
Dae Sik Hah ◽  
Chung Hui Kim ◽  
Euikyung Kim ◽  
Jong Shu Kim
Keyword(s):  
Salmonella Typhimurium ◽  
Chromosome Aberration ◽  
Metabolic Activation ◽  
Mouse Bone Marrow ◽  
Houttuynia Cordata ◽  
Reverse Mutation ◽  
Methanol Extracts ◽  
Polychromatic Erythrocytes ◽  
Houttuynia Cordata Thunb ◽  
Mutation Assay

The present study was conducted to evaluate the activity of methanol extracts from Houttuynia cordata Thunb. (HC) in a reverse mutation assay in Salmonella typhimurium, and a chromosome aberration assay in the Chinese hamster ovary (CHO) cell line and to evaluate its effect on the occurrence of polychromatic erythrocytes in mice. In the reverse mutation assay using Salmonella typhimurium TA98, TA100, TA1535, and TA1537 and Escherichia coli WP2urvA-, methanol extracts of HC (5, 2.5, 1.25, 0.62, or 0.312 mg/plate) did not induce reverse mutations in the presence or absence of an S9 metabolic activation mixture. In the chromosome aberration test using CHO cells, methanol extracts (1.25, 2.5 or 5 μg/ml) caused a few incidences of structural and numerical aberrations, in both of absence or presence of an S9 metabolic activation mixture, but in comparison with the positive control group, these incidences were not significantly increased. In the mouse micronucleus test, no significant increases in the occurrence of micronucleated polychromatic erythrocytes were observed in male ICR mice that were orally administered methanol extracts of HC at doses of 2.0, 1.0, or 0.5 g/kg. From these results, we concluded that the methanol extracts of HC did not induce harmful effects on genes in bacteria, a mammalian cell system or in mouse bone marrow cells. Thus, HC's use for health promotion and/or a sick remedy for humans may be safe.

scholarly journals Tobacco Smoke Chemistry. 3. Aromatic Acids of Cigarette Smoke Condensate.

1989 ◽  
Vol 43 ◽  
pp. 381-385 ◽  
Author(s):  
Jan Arnarp ◽  
Britt-Marie Dahlin ◽  
Curt R. Enzell ◽  
Tore Pettersson ◽  
A. J. Kondow ◽  
...  
Keyword(s):  
Cigarette Smoke ◽  
Tobacco Smoke ◽  
Aromatic Acids ◽  
Cigarette Smoke Condensate

scholarly journals Tobacco Smoke Chemistry. 5. Alkyl Substituted 3-Hydroxy-4-pyrones Found in Cigarette Smoke Condensate.

1990 ◽  
Vol 44 ◽  
pp. 963-967 ◽  
Author(s):  
Jan Arnarp ◽  
Jacek Bielawski ◽  
Britt-Marie Dahlin ◽  
Olof Dahlman ◽  
Curt R. Enzell ◽  
...  
Keyword(s):  
Cigarette Smoke ◽  
Tobacco Smoke ◽  
Cigarette Smoke Condensate

scholarly journals Evaluation of mutagenic activity of the pesticides: actara, sencor, mospilan, pencozeb, fastac in the Ames test

2008 ◽  
Vol 6 (4) ◽  
pp. 29-33 ◽  
Author(s):  
Nazira S Karamova ◽  
Alexandra P Denisova ◽  
Zenon Stasevski
Keyword(s):  
Salmonella Typhimurium ◽  
Rat Liver ◽  
Potato Plant ◽  
Ames Test ◽  
Mutagenic Activity ◽  
Metabolic Activation ◽  
Mutagenic Effect ◽  
Toxic Concentrations ◽  
S9 Fraction

The mutagenic activity of five pesticides actara, sencor, mospilan, pencozeb, fastac widely used for treatment of potato plant lands in Tatarstan was tested in the Ames test. The non toxic concentrations of the pesticides determined in preliminary cytotoxicty test were used in the Ames assay. Pesticides actara, mospilan, pencozeb, fastac did not show mutagenic effect in Salmonella typhimurium TA 100 without rat liver S9 fraction. The weak mutagenic effect of herbicide sencor was established at concentration 1 ug/plate. Metabolic activation in vitro using rat liver S9 fraction decreased the mutagenic activity of sencor and did not alter the mutagenicity rate of the pesticides actara, mospilan, pencozeb and fastac.

Genotoxicity Testing of Cooked Cured Meat Pigment (CCMP) and Meat Emulsion Coagulates Prepared with CCMP

2000 ◽  
Vol 63 (7) ◽  
pp. 945-952 ◽  
Author(s):  
M. STEVANOVIĆ ◽  
P. ČADEŽ ◽  
B. ŽLENDER ◽  
M. FILIPIČ
Keyword(s):  
Salmonella Typhimurium ◽  
Ames Test ◽  
Mutagenic Activity ◽  
Metabolic Activation ◽  
Meat Emulsion ◽  
Color Development ◽  
Umu Test ◽  
Musculus Quadriceps ◽  
Cured Meat ◽  
Residual Nitrite

The preformed cooked cured meat pigment (CCMP) synthesized directly from bovine red blood cells or through a hemin intermediate was found to be a viable colorant for application to comminuted pork as a nitrite substitute. However the genotoxicity of CCMP and meat emulsion coagulates prepared with CCMP has not been evaluated. Therefore the objectives of this work were to investigate genotoxicity of CCMP and the influence of CCMP addition on genotoxicity and the content of residual nitrite in model meat emulsion coagulates. Meat emulsions were prepared from white (musculus longissimus dorsi) and red (musculus quadriceps femoris) pork muscles with two different amounts of synthesized pigment CCMP. Comparatively, emulsions with fixed addition of nitrite salt and emulsions without any addition for color development were made. Genotoxicity of CCMP and meat emulsion coagulates was tested with the SOS/umu test and the Ames test. Neither CCMP nor meat emulsion coagulates prepared with CCMP or nitrite salt were genotoxic in the SOS/umu test. In the Ames test using Salmonella Typhimurium strains TA98 and TA100 samples of coagulates prepared with CCMP and with nitrite showed weak mutagenic activity in Salmonella Typhimurium strain TA100 but only in the absence of the metabolic activation, while CCMP was not mutagenic. Coagulates prepared with CCMP contained significantly less residual nitrite than coagulates prepared with nitrite salt. These results indicate that from the human health standpoint the substitution of nitrite salt with CCMP would be highly recommendable.

scholarly journals Testing of the mutagenic potential of N-(γ-aminobuturyl)-1-aza-15-crown-5 hydrochloride in Ames test microplate modification

2019 ◽  
pp. 81-87
Author(s):  
M. Ya. Golovenko ◽  
V. B. Larionov ◽  
S. S. Basok ◽  
A. S. Reder
Keyword(s):  
Salmonella Typhimurium ◽  
Sodium Azide ◽  
Anticonvulsant Activity ◽  
Ames Test ◽  
Point Mutations ◽  
Gene Mutations ◽  
Metabolic Activation ◽  
Chemical Mutagenesis ◽  
Mutagenic Potential ◽  
Significant Development

In recent years, studies in the field of chemical mutagenesis have undergone significant development, due to the introduction of a large number of different chemicals and scientific advances in the creation and use of new test systems, allowing a complete assessment of both mutagens themselves and their metabolites. The aim of the work was to determine possible induction of gene mutations under influence of hydrochloride N-(γ-aminobuturil)-1-aza-4,7,10,13-tetraozacyclopentadecan (TOCPD), which has nootropic, anxiolytic and anticonvulsant activity. The ability of TOCPD to induce gene mutations was evaluated in Ames test on strains Salmonella typhimurium ТА 98 (frame shift mutations) and ТА 100 (substitution point mutations). The compound was used at concentrations of 10, 100, 250, 500 and 1000 μg/ml. Standard mutagens were 2-nitrofluoren for Salmonella typhimurium ТА 98 and sodium azide for Salmonella typhimurium ТА 100 in test without metabolic activation. In an activation variant a microsomal activating mixture was used (S9 mix). In tests with activation for both strains, 2-aminoantracene was used. The µAmes kit, Moltox (USA) and Muta-ChromoPlate kit (Canada) were used in the work. The results were evaluated by the number of wells with mutated cells with medium color changing from purple to yellow. The obtained data showed that in the control and according to the action of corresponding mutagens, the percentage of wells with mutated cells corresponded to the standard parameters determined by protocol of the microplate test. For the action of TOCPD compound, no gene mutations were detected in both S. typhimurium ТА 98 and ТА 100 strains within the concentrations used.

scholarly journals Genotoxicity of triiodothyronine: Effects on Salmonella typhimurium TA100 and human lymphocytes in vitro

Genetika ◽  
2017 ◽  
Vol 49 (2) ◽  
pp. 387-397
Author(s):  
Jasna Bosnjak-Neumüller ◽  
Ninoslav Djelic ◽  
Milena Radakovic ◽  
Stoimir Kolarevic ◽  
Dragana Mitic-Culafic ◽  
...  
Keyword(s):  
Salmonella Typhimurium ◽  
Mammalian Cells ◽  
Ames Test ◽  
Human Lymphocytes ◽  
Genetic Material ◽  
Genotoxic Effects ◽  
Reverse Mutation ◽  
Mutagenic Effects ◽  
Mutation Assay

There is increasing evidence that substances which are normally present in human or animal bodies may, under the certain circumstances, exhibit deleterious effects on genetic material, therefore acting as endogenous mutagenic agents. Since hormones represent one of the best studied endogenous mutagens, some research focused on the possible role of thyroid hormone in mutagenesis and carcinogenesis. Indeed, thyroid hormones accelerate aerobic metabolism and production of reactive oxygen species (ROS) and, therefore, may exhibit mutagenic effects in various test systems on mammalian cells. However, possible mutagenic effects on prokaryotic DNA has not been investigated so far. Hence, the aim of this research was to compare the sensitivity of TA 100 Salmonella typhimurium with and without metabolic activation with S9 fraction, and human lymphocytes to possible genotoxic effects of triiodothyronine (T3). Therefore, we used the reverse mutation assay on S. typhimurium (Ames test) and in vitro Comet assay in isolated peripheral blood human lymphocytes. In both tests-systems a broad spectrum of T3 concentrations was applied. The obtained results showed absence of genotoxic effects of T3 in bacterial reverse mutation assay and very profound genotoxic effects in human lymphocytes at concentrations higher than 15 ?M. We only observed cytotoxic effects in bacterial system at very high T3 concentrations (300 and 500 ?M). In conclusion, T3 was unable to increase the level of reverse mutations in Ames test both with and without S9 mix. Therefore, it seems that ROS production in mitochondria may be the primary cause of DNA damage caused by T3 in mammalian cells.

Tobacco Smoke Chemistry. 6. Alkyl-Substituted 2-Hydroxy-2-cyclohexenones Found in Cigarette Smoke Condensate.

1991 ◽  
Vol 45 ◽  
pp. 105-107 ◽  
Author(s):  
Jan Arnarp ◽  
Britt-Marie Dahlin ◽  
Curt R. Enzell ◽  
Tore Pettersson ◽  
Gunilla Weidemann ◽  
...  
Keyword(s):  
Cigarette Smoke ◽  
Tobacco Smoke ◽  
Cigarette Smoke Condensate
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