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Bulanda S, Lau K, Nowak A, Łyko-Morawska D, Kotylak A, Janoszka B. The Risk of Oral Cancer and the High Consumption of Thermally Processed Meat Containing Mutagenic and Carcinogenic Compounds. Nutrients 2024; 16:1084. [PMID: 38613117 PMCID: PMC11013896 DOI: 10.3390/nu16071084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 03/25/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024] Open
Abstract
The International Agency for Research on Cancer has classified the consumption of heat-processed meat as a direct human carcinogen and the consumption of red meat as a probable carcinogen. Mutagenic and carcinogenic compounds present in meat dishes include, among others, polycyclic aromatic hydrocarbons (PAHs) and heterocyclic aromatic amines (HAAs). These compounds can cause the development of gastrointestinal cancer. Oral cancer is one of the world's research priorities due to the ever-increasing incidence rate. However, the effect of diet on oral cancer is still a poorly recognized issue. The aim of this study was to assess the relationship between the risk of oral cancer and dietary ingredients with a particular emphasis on red meat and thermally processed meat. This study was conducted among patients with oral cancer in 2022 and 2023. The shortened standardized Food Frequency Questionnaire (FFQ) and a multivariate regression statistical analysis were used. The high consumption of red meat in general and thermally processed meat, especially smoked, fried, roasted and boiled, increases the risk of oral cavity cancer. Limiting the consumption of meat products and modifying the methods of preparing meat dishes may reduce exposure to carcinogenic compounds from the diet and thus reduce the risk of developing oral cancer.
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Affiliation(s)
- Sylwia Bulanda
- Department of Chemistry, Faculty of Medical Sciences in Zabrze, Medical University of Silesia in Katowice, Jordana 19, 41-808 Zabrze, Poland;
| | - Karolina Lau
- Department of Environmental Medicine and Epidemiology in Zabrze, Medical University of Silesia in Katowice, Jordana 19, 41-808 Zabrze, Poland;
| | - Agnieszka Nowak
- Department of Chemistry, Faculty of Medical Sciences in Zabrze, Medical University of Silesia in Katowice, Jordana 19, 41-808 Zabrze, Poland;
| | - Dorota Łyko-Morawska
- Department of Vascular Surgery, General Surgery, Angiology and Phlebology, Medical University of Silesia, Ziołowa 45/47, 40-635 Katowice, Poland;
| | - Anna Kotylak
- I Radiation and Clinical Oncology Department, Maria Skłodowska-Curie National Research Institute of Oncology, Gliwice Branch, 44-102 Gliwice, Poland;
| | - Beata Janoszka
- Department of Chemistry, Faculty of Medical Sciences in Zabrze, Medical University of Silesia in Katowice, Jordana 19, 41-808 Zabrze, Poland;
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2
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Doménech E, Martorell S. Review of the Terminology, Approaches, and Formulations Used in the Guidelines on Quantitative Risk Assessment of Chemical Hazards in Food. Foods 2024; 13:714. [PMID: 38472827 DOI: 10.3390/foods13050714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 03/14/2024] Open
Abstract
This paper reviews the published terminology, mathematical models, and the possible approaches used to characterise the risk of foodborne chemical hazards, particularly pesticides, metals, mycotoxins, acrylamide, and polycyclic aromatic hydrocarbons (PAHs). The results confirmed the wide variability of the nomenclature used, e.g., 28 different ways of referencing exposure, 13 of cancer risk, or 9 of slope factor. On the other hand, a total of 16 equations were identified to formulate all the risk characterisation parameters of interest. Therefore, the present study proposes a terminology and formulation for some risk characterisation parameters based on the guidelines of international organisations and the literature review. The mathematical model used for non-genotoxic hazards is a ratio in all cases. However, the authors used the probability of cancer or different ratios, such as the margin of exposure (MOE) for genotoxic hazards. For each effect studied per hazard, the non-genotoxic effect was mostly studied in pesticides (79.73%), the genotoxic effect was mostly studied in PAHs (71.15%), and both effects were mainly studied in metals (59.4%). The authors of the works reviewed generally opted for a deterministic approach, although most of those who assessed the risk for mycotoxins or the ratio and risk for acrylamide used the probabilistic approach.
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Affiliation(s)
- Eva Doménech
- Instituto Universitario de Ingeniería de Alimentos Food-UPV, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Sebastián Martorell
- MEDASEGI Research Group, Department of Chemical and Nuclear Engineering, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
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3
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Blum K, FitzGerald R, Wilks MF, Barle EL, Hopf NB. Use of the benchmark-dose (BMD) approach to derive occupational exposure limits (OELs) for genotoxic carcinogens: N-nitrosamines. J Appl Toxicol 2023. [PMID: 36840679 DOI: 10.1002/jat.4455] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/29/2023] [Accepted: 02/21/2023] [Indexed: 02/26/2023]
Abstract
N-Nitrosamines are potent carcinogens and considered non-threshold carcinogens in various regulatory domains. However, recent data indicate the existence of a threshold for genotoxicity, which can be adequately demonstrated. This aspect has a critical impact on selecting the methodology that is applied to derive occupational exposure limits (OELs). OELs are used to protect workers potentially exposed to various chemicals by supporting the selection of appropriate control measures and ultimately reducing the risk of occupational cancer. Occupational exposures to nitrosamines occur during manufacturing processes, mainly in the rubber and chemical industry. The present study derives OELs for inhaled N-nitrosamines, employing the benchmark dose (BMD) approach if data are adequate and read-across for nitrosamines without adequate data. Additionally, benchmark dose lower confidence limit (BMDL) is preferred and more suitable point-of-departure (PoD) to calculate human health guidance values, including OEL. The lowest OEL (0.2 μg/m3 ) was derived for nitrosodiethylamine (NDEA), and nitrosopiperidine (NPIP) (OEL = 0.2 μg/m3 ), followed by nitrosopyrrolidine (NPYR) (0.4 μg/m3 ), nitrosodimethylamine (NDMA), nitrosodimethylamine (NMEA), and nitrosodipropylamine (NDPA) (0.5 μg/m3 ), nitrosomorpholine (NMOR) (OEL = 1 μg/m3 ), and nitrosodibutylamine (NDBA) (OEL = 2.5 μg/m3 ). Limits based on "non-threshold" TD50 slope calculation were within a 10-fold range. These proposed OELs do not consider skin absorption of nitrosamines, which is also a possible route of entry into the body, nor oral or other environmental sources. Furthermore, we recommend setting a limit for total nitrosamines based on the occupational exposure scenario and potency of components.
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Affiliation(s)
- Kamila Blum
- Environment, Health & Safety Department, GlaxoSmithKline, Munich, Germany.,Faculty of Science and Medicine, University of Geneva, Switzerland
| | - Rex FitzGerald
- Swiss Centre for Applied Human Toxicology (SCAHT) & Department of Pharmaceutical Sciences, University of Basel, Switzerland
| | - Martin F Wilks
- Swiss Centre for Applied Human Toxicology (SCAHT) & Department of Pharmaceutical Sciences, University of Basel, Switzerland
| | | | - Nancy B Hopf
- Swiss Centre for Applied Human Toxicology (SCAHT) & Department of Pharmaceutical Sciences, University of Basel, Switzerland.,Department for Occupational and Environmental Health, Centre for Primary Care and Public Health (Unisanté), University of Lausanne, Lausanne, Switzerland
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4
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Kim MK, Kang JS, Kundu A, Kim HS, Lee BM. Risk Assessment and Risk Reduction of Ptaquiloside in Bracken Fern. TOXICS 2023; 11:115. [PMID: 36850990 PMCID: PMC9959108 DOI: 10.3390/toxics11020115] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
This study was conducted to determine the optimal boiling time to reduce ptaquiloside (PTA) and to carry out a risk assessment for PTA, a representative toxic substance found in bracken fern (BF; Pteridium aquilinum), which is frequently consumed as food in East Asian countries. High-performance liquid chromatography showed that the concentration of PTA in BF was reduced by up to 99% after boiling for 20 min. Risk assessment results showed that the cancer margin of exposure (MOE; ≥ 25,000 = safe) to PTA for an average daily exposure scenario after boiling BF for 20 min was considered safe. In addition, the non-cancer MOE (≥ 300 = safe) to PTA under an average daily exposure scenario after BF boiling for 20 min was considered safe. However, human exposure to PTA was considered unsafe under the non-boiled BF exposure and maximum daily exposure scenarios. Therefore, boiling BF for at least 20 min is recommended before consumption, to reduce exposure to PTA as much as possible.
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Affiliation(s)
- Min Kook Kim
- Division of Toxicology, College of Pharmacy, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si 16419, Republic of Korea
| | - Ji Soo Kang
- Division of Toxicology, College of Pharmacy, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si 16419, Republic of Korea
| | - Amit Kundu
- Laboratory of Molecular Toxicology, College of Pharmacy, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si 16419, Republic of Korea
| | - Hyung Sik Kim
- Laboratory of Molecular Toxicology, College of Pharmacy, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si 16419, Republic of Korea
| | - Byung-Mu Lee
- Division of Toxicology, College of Pharmacy, Sungkyunkwan University, 2066 Seobu-ro, Jangan-gu, Suwon-si 16419, Republic of Korea
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5
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Farkas Z, Kerekes K, Ambrus Á, Süth M, Peles F, Pusztahelyi T, Pócsi I, Nagy A, Sipos P, Miklós G, Lőrincz A, Csorba S, Jóźwiak ÁB. Probabilistic modeling and risk characterization of the chronic aflatoxin M1 exposure of Hungarian consumers. Front Microbiol 2022; 13:1000688. [PMID: 36118212 PMCID: PMC9478333 DOI: 10.3389/fmicb.2022.1000688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Accepted: 08/15/2022] [Indexed: 11/18/2022] Open
Abstract
Aflatoxin contamination can appear in various points of the food chain. If animals are fed with contaminated feed, AFB1 is transformed-among others-to aflatoxin M1 (AFM1) metabolite. AFM1 is less toxic than AFB1, but it is still genotoxic and carcinogenic and it is present in raw and processed milk and all kinds of milk products. In this article, the chronic exposure estimation and risk characterization of Hungarian consumers are presented, based on the AFM1 contamination of milk and dairy products, and calculated with a probabilistic method, the two-dimensional Monte-Carlo model. The calculations were performed using the R plugin (mc2d package) integrated into the KNIME (Konstanz Information Miner) software. The simulations were performed using data from the 2018-2020 food consumption survey. The AFM1 analytical data were derived from the Hungarian monitoring survey and 1,985 milk samples were analyzed within the framework of the joint project of the University of Debrecen and the National Food Chain Safety Office of Hungary (NÉBIH). Limited AFM1 concentrations were available for processed dairy products; therefore, a database of AFM1 processing factors for sour milk products and various cheeses was produced based on the latest literature data, and consumer exposure was calculated with the milk equivalent of the consumed quantities of these products. For risk characterization, the calculation of hazard index (HI), Margin of Exposure, and the hepatocellular carcinoma incidence were used. The results indicate that the group of toddlers that consume a large amount of milk and milk products are exposed to a certain level of health risk. The mean estimated daily intake of toddlers is in the range of 0.008-0.221 ng kg-1 bw day-1; the 97.5th percentile exposure of toddlers is between 0.013 ng kg-1 bw day-1 and 0.379 ng kg-1 bw day-1, resulting in a HI above 1. According to our study, the exposure of older age groups does not pose an emergent health risk. Nevertheless, the presence of carcinogenic compounds should be kept to a minimum in the whole population.
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Affiliation(s)
- Zsuzsa Farkas
- Digital Food Institute, University of Veterinary Medicine Budapest, Budapest, Hungary
| | - Kata Kerekes
- System Management and Supervision Directorate, National Food Chain Safety Office, Budapest, Hungary
| | - Árpád Ambrus
- Doctoral School of Nutrition and Food Sciences, University of Debrecen, Debrecen, Hungary
| | - Miklós Süth
- Digital Food Institute, University of Veterinary Medicine Budapest, Budapest, Hungary
| | - Ferenc Peles
- Institute of Food Science, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Tünde Pusztahelyi
- Central Laboratory of Agricultural and Food Products, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen. Debrecen, Hungary
| | - István Pócsi
- Department of Molecular Biotechnology and Microbiology, Institute of Biotechnology, Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Attila Nagy
- Food Chain Safety Laboratory Directorate, National Food Chain Safety Office, Budapest, Hungary
| | - Péter Sipos
- Institute of Nutrition, Faculty of Agricultural and Food Sciences and Environmental Management, University of Debrecen, Debrecen, Hungary
| | - Gabriella Miklós
- Analytical National Reference Laboratory, Food Chain Safety Laboratory Directorate, National Food Chain Safety Office, Székesfehérvár, Hungary
| | - Anna Lőrincz
- Analytical National Reference Laboratory, Food Chain Safety Laboratory Directorate, National Food Chain Safety Office, Budapest, Hungary
| | - Szilveszter Csorba
- Digital Food Institute, University of Veterinary Medicine Budapest, Budapest, Hungary
| | - Ákos Bernard Jóźwiak
- Digital Food Institute, University of Veterinary Medicine Budapest, Budapest, Hungary
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6
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Li K, Wang R, Wang X, Sun C, Li Q. Effects of seasons and parts on volatile N-nitrosamines and their exposure and risk assessment in raw chicken and duck meats. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2022; 59:1831-1839. [PMID: 35531403 PMCID: PMC9046479 DOI: 10.1007/s13197-021-05195-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 06/25/2021] [Accepted: 06/29/2021] [Indexed: 05/03/2023]
Abstract
The N-nitrosamine (NA) concentrations and types in raw chicken and duck meats of different parts and seasons were estimated by headspace solid-phase micro-extraction with gas chromatography-mass spectrometry (HS-SPME-GC-MS). The exposure level and hazard quotient of each detected volatile N-nitrosamine (VNA) were conducted. The selected chicken and duck samples were contaminated by VNAs to some extent. The major types and contents of VNAs in different parts of chicken and duck meats varied seasonally. For chicken samples, the order of the total VNA concentrations was as follows: autumn > spring > winter > summer. For duck samples, the order was changed as follows: winter > autumn > summer > spring (thigh samples) and autumn > spring > winter > summer (breast samples). The estimated exposure levels for adults caused by duck consumption were slightly higher than those by chickens, which was consistent with the tendency in 2-3 years old children. According to the linear regression correlation between the 10% benchmark dose limit (BMDL10) and subtriplicate of median lethal dose (LD50), BMDL10 values of each VNA were calculated. Due to this hypothesis, the risk assessments of each detected VNA and total VNAs posed by consuming chicken and duck meats in Tianjin, China were of low concern. Supplementary Information The online version contains supplementary material available at 10.1007/s13197-021-05195-1.
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Affiliation(s)
- Kexin Li
- Department of Chemistry, College of Science, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing, 100083 People’s Republic of China
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing, 100083 People’s Republic of China
| | - Rui Wang
- Agricultural Analysis and Testing Center, Tianjin Agricultural University, No. 22, Jinjing Road, Xiqing District, Tianjin, 300000, People’s Republic of China
| | - Xiaoxu Wang
- Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing, 100083 People’s Republic of China
| | - Changxia Sun
- Department of Chemistry, College of Science, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing, 100083 People’s Republic of China
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing, 100083 People’s Republic of China
| | - Qiang Li
- Department of Chemistry, College of Science, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing, 100083 People’s Republic of China
- Beijing Key Laboratory of Forest Food Processing and Safety, Beijing Forestry University, No. 35, Qinghua East Road, Haidian District, Beijing, 100083 People’s Republic of China
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7
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Bulanda S, Janoszka B. Consumption of Thermally Processed Meat Containing Carcinogenic Compounds (Polycyclic Aromatic Hydrocarbons and Heterocyclic Aromatic Amines) versus a Risk of Some Cancers in Humans and the Possibility of Reducing Their Formation by Natural Food Additives-A Literature Review. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19084781. [PMID: 35457645 PMCID: PMC9024867 DOI: 10.3390/ijerph19084781] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/23/2022] [Accepted: 04/12/2022] [Indexed: 12/18/2022]
Abstract
(1) Background: Thermal treatment of high-protein food may lead to the formation of mutagenic and carcinogenic compounds, e.g., polycyclic aromatic hydrocarbons and heterocyclic aromatic amines. Frequent consumption of processed meat was classified by the International Agency for Research on Cancer as directly carcinogenic for humans. (2) Methods: A literature review was carried out based on a search of online databases for articles on consuming thermally processed meat containing carcinogenic compounds versus a risk of cancers in humans published between 2001 and 2021. (3) Results: A review of the current literature on the participation of PAHs and HAA in the formation of certain neoplasms indicates a positive relationship between diet and the incidences of many cancers, especially colon cancer. A simple way to obtain dishes with reduced contents of harmful compounds is the use of spices and vegetables as meat additives. These seasonings are usually rich in antioxidants that influence the mechanism of HAA and PAH synthesis in food. (4) Conclusions: As there is a growing risk of a cancer tendency because of exposing humans to PAHs and HAAs, it is extremely vital to find a simple way to limit carcinogenic compound synthesis in a processed proteinaceous food. Disseminating the knowledge about the conditions for preparing dishes with a reduced content of carcinogenic compounds could become a vital element of cancer prevention programs.
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8
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Hemgesberg M, Stegmüller S, Cartus A, Schrenk D. A Benchmark analysis of acrylamide-derived DNA adducts in rat hepatocytes in culture measured by a new, highly sensitive method. Toxicology 2021; 464:153022. [PMID: 34743026 DOI: 10.1016/j.tox.2021.153022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 10/31/2021] [Accepted: 11/01/2021] [Indexed: 10/19/2022]
Abstract
Acrylamide (AA) is a carcinogen formed during thermal food processing and can cause tumors in rodents while its carcinogenic potency in humans is unclear. Metabolism of AA, preferentially in the liver, leads to glycidamide (GA) forming N7-GA-guanine (N7-GA-Gua) as the major AA-derived DNA adduct in rodents. Here, a novel method allowing high sensitivity by avoidance of major matrix effects was applied to analyze N7-GA-Gua levels in nuclear DNA from rat hepatocytes in primary culture. We could thus for the first time detect a background level of 5-10 adducts/108 nucleosides in untreated hepatocytes. Incubation with AA did not result in a statistically significant increase in adduct levels over background up to a substrate concentration of 500 μM although a trend to slightly higher adduct levels was observed at and above 200 μM AA. At concentrations > 500 μM significant increases in N7-GA-Gua levels were found. When Benchmark concentration (BMC) modeling was applied to the data, non-linear concentration-response curves were obtained suggesting that AA started to cause measurable increases over background of N7-GA-Gua levels above certain concentrations only. Calculation of the composite BMCL10 (Lower Bound of a 95 % confidence interval) of a BMC leading to a 10 % increase of N7-GA-Gua levels over background resulted in a value of 6.35 μM AA after 24 h. A concentration below this value cannot be expected to lead to an increase in N7-GA-Gua of more than 10 % over the background seen in untreated hepatocytes.
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Affiliation(s)
- Melanie Hemgesberg
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663 Kaiserslautern, Germany.
| | - Simone Stegmüller
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663 Kaiserslautern, Germany.
| | - Alexander Cartus
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663 Kaiserslautern, Germany.
| | - Dieter Schrenk
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663 Kaiserslautern, Germany.
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Hemgesberg M, Stegmüller S, Cartus A, Hemmer S, Püttmann M, Stockis JP, Schrenk D. Acrylamide-derived DNA adducts in human peripheral blood mononuclear cell DNA: Correlation with body mass. Food Chem Toxicol 2021; 157:112575. [PMID: 34560178 DOI: 10.1016/j.fct.2021.112575] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 08/16/2021] [Accepted: 09/14/2021] [Indexed: 12/14/2022]
Abstract
Acrylamide (AA) is a carcinogen formed during thermal food processing and can cause tumors in rodents while its carcinogenic potency in humans is unclear. Metabolic conversion of AA leads to glycidamide (GA) forming N7-GA-guanine (N7-GA-Gua) as the major DNA adduct in rodents while no such adducts were found in human tissues so far. In a cohort of 56 healthy volunteers adduct levels were determined in peripheral blood mononuclear cell (PBMC) DNA and anthropometric, dietary, and biochemical parameters were measured or inquired using a questionnaire. In the majority of PBMC DNA samples the levels found were above one adduct/108 nucleosides not being correlated to dietary habits including coffee consumption, or to blood glucose levels or hemoglobin HbA1c. However, adduct levels were significantly correlated with the body mass index (BMI) and showed a continuous increase over three BMI classes. Our findings indicate a background of AA-derived DNA adducts present in humans in PBMC related to body mass rather than to certain dietary or lifestyle factors.
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Affiliation(s)
- Melanie Hemgesberg
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663, Kaiserslautern, Germany.
| | - Simone Stegmüller
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663, Kaiserslautern, Germany.
| | - Alexander Cartus
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663, Kaiserslautern, Germany.
| | - Selina Hemmer
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663, Kaiserslautern, Germany.
| | - Michael Püttmann
- Synlab Center for Laboratory Medicine, D-67434, Neustadt/Weinstrasse, Germany.
| | - Jean-Pierre Stockis
- Statistics Department, University of Kaiserslautern, D-67663, Kaiserslautern, Germany.
| | - Dieter Schrenk
- Food Chemistry and Toxicology Department, University of Kaiserslautern, D-67663, Kaiserslautern, Germany.
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10
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Position paper on the use of an “estimated acceptable concentration” (EAC) as basis for a control policy's action level for carcinogens unintentionally present in food. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2020.11.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Ma B, Villalta PW, Hochalter JB, Stepanov I, Hecht SS. Methyl DNA phosphate adduct formation in lung tumor tissue and adjacent normal tissue of lung cancer patients. Carcinogenesis 2020; 40:1387-1394. [PMID: 30873516 DOI: 10.1093/carcin/bgz053] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 02/25/2019] [Accepted: 03/08/2019] [Indexed: 11/14/2022] Open
Abstract
The formation of methyl DNA adducts is a critical step in carcinogenesis initiated by the exposure to methylating carcinogens. Methyl DNA phosphate adducts, formed by methylation of the oxygen atoms of the DNA phosphate backbone, have been detected in animals treated with methylating carcinogens. However, detection of these adducts in human tissues has not been reported. We developed an ultrasensitive liquid chromatography-nanoelectrospray ionization-high resolution tandem mass spectrometry method for detecting methyl DNA phosphate adducts. Using 50 μg of human lung DNA, a limit of quantitation of two adducts/1010 nucleobases was achieved. Twenty-two structurally unique methyl DNA phosphate adducts were detected in human lung DNA. The adduct levels were measured in both tumor and adjacent normal tissues from 30 patients with lung cancer, including 13 current smokers and 17 current non-smokers, as confirmed by measurements of urinary cotinine and 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol. Levels of total methyl DNA phosphate adducts in normal lung tissues were higher in smokers than non-smokers, with an average of 13 and 8 adducts/109 nucleobases, respectively. Methyl DNA phosphate adducts were also detected in lung tissues from untreated rats with steady-state levels of 5-7 adducts/109 nucleobases over a period of 70 weeks. This is the first study to report the detection of methyl DNA phosphate adducts in human lung tissues. The results provide new insights toward using these DNA adducts as potential biomarkers to study human exposure to environmental methylating carcinogens.
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Affiliation(s)
- Bin Ma
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Peter W Villalta
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | | | - Irina Stepanov
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
| | - Stephen S Hecht
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN, USA
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12
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Pirsaheb M, Dragoi EN, Vasseghian Y. Polycyclic Aromatic Hydrocarbons (PAHs) Formation in Grilled Meat products—Analysis and Modeling with Artificial Neural Networks. Polycycl Aromat Compd 2020. [DOI: 10.1080/10406638.2020.1720750] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Meghdad Pirsaheb
- Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Elena-Niculina Dragoi
- Faculty of Chemical Engineering and Environmental Protection “Cristofor Simionescu”, “Gheorghe Asachi” Technical University, Iasi, Romania
- Faculty of Automatic Control and Computer Engineering, “Gheorghe Asachi” Technical University of Iasi, Iasi, Romania
| | - Yasser Vasseghian
- Research Center for Environmental Determinants of Health (RCEDH), Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
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13
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Yener Y, Çelik I, Sur E, Öznurlu Y, Özaydin T. Effects of long term oral acrylamide administration on alpha naphthyl acetate esterase and acid phosphatase activities in the peripheral blood lymphocytes of rats. Biotech Histochem 2019; 94:352-359. [PMID: 30864862 DOI: 10.1080/10520295.2019.1571227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Acrylamide is an important industrial chemical; it also is formed in starch-rich foodstuffs during baking, frying and roasting. Most acrylamide exposure occurs by ingestion of processed foods. We investigated possible immunotoxic effects of extended administration of low doses of acrylamide in rats. To do this, we measured alpha-naphthyl acetate esterase (ANAE) and acid phosphatase (ACP-ase) activities in peripheral blood lymphocytes. Male and female weanling Wistar rats were administered 2 or 5 mg acrylamide/kg/day in drinking water for 90 days. Peripheral blood was sampled at the end of the administration period. We found ANAE staining in eosinophils and T-lymphocytes, but not in monocytes, platelets, B-lymphocytes and neutrophils. ACP-ase was found in B-lymphocytes. We found a significant reduction of the ratio of ANAE:ACP-ase in lymphocytes of the experimental animals compared to controls. We found no statistically significant differences between the doses or sexes. We found that acrylamide ingested in processed foods might affect the immune system adversely by decreasing the population of mature T- and B-lymphocytes.
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Affiliation(s)
- Y Yener
- a Education Faculty, Bolu Abant İzzet Baysal University , Bolu , Turkey
| | - I Çelik
- b Veterinary Faculty, Konya Selçuk University , Konya , Turkey
| | - E Sur
- b Veterinary Faculty, Konya Selçuk University , Konya , Turkey
| | - Y Öznurlu
- b Veterinary Faculty, Konya Selçuk University , Konya , Turkey
| | - T Özaydin
- b Veterinary Faculty, Konya Selçuk University , Konya , Turkey
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14
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Schrenk D. What is the meaning of 'A compound is carcinogenic'? Toxicol Rep 2018; 5:504-511. [PMID: 29854622 PMCID: PMC5977538 DOI: 10.1016/j.toxrep.2018.04.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 03/14/2018] [Accepted: 04/06/2018] [Indexed: 01/08/2023] Open
Abstract
Chemical Carcinogens are compounds which can cause cancer in humans and experimental animals. This property is attributed to many chemicals in the public discussion, resulting in a widespread perception of danger and threat. In contrast, a scientific analysis of the wide and non-critical use of the term 'carcinogenic' is warranted. First, it has to be clarified if the compound acts in a genotoxic or non-genotoxic manner. In the latter case, an ineffective (safe) threshold dose without cancer risk can be assumed. In addition, it needs to be investigated if the mode-of-action causing tumors in laboratory animals is relevant at all for humans. In case the compound is clearly directly genotoxic, an ineffective threshold dose cannot be assumed. However, also in this case it is evident that high doses of the compound are generally associated with a high cancer risk, low doses with a lower one. Based on dose-response data from animal experiments, quantification of the cancer risk is carried out by mathematical modeling. If the safety margin between the lowest carcinogenic dose in animals and the relevant level of exposure in humans exceeds 10,000, the degree of concern is classified as low. Cases, where the compound turns out to be genotoxic in one study or one test only but not in others or only in vitro but not in vivo, are particularly difficult to explain and cause controversial discussions. Also for indirectly genotoxic agents, an ineffective (threshold) dose must be assumed. The situation is aggravated by the use of doubtful epidemiological studies in humans such as in the case of glyphosate, where data from mixed exposure to various chemicals were used. If such considerations are mixed with pure hazard classifications such as 'probably carcinogenic in humans' ignoring dose-response behavior and mode-of-action, the misinformation and public confusion are complete. It appears more urgent but also more difficult than ever to return to a scientifically based perception of these issues.
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Xiang P, Wang SS, He M, Han YH, Zhou ZH, Chen DL, Li M, Ma LQ. The in vitro and in vivo biocompatibility evaluation of electrospun recombinant spider silk protein/PCL/gelatin for small caliber vascular tissue engineering scaffolds. Colloids Surf B Biointerfaces 2018; 163:19-28. [DOI: 10.1016/j.colsurfb.2017.12.020] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 11/25/2017] [Accepted: 12/11/2017] [Indexed: 01/29/2023]
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16
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Ma B, Zarth AT, Carlson ES, Villalta PW, Upadhyaya P, Stepanov I, Hecht SS. Methyl DNA Phosphate Adduct Formation in Rats Treated Chronically with 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone and Enantiomers of Its Metabolite 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanol. Chem Res Toxicol 2018; 31:48-57. [PMID: 29131934 PMCID: PMC5770887 DOI: 10.1021/acs.chemrestox.7b00281] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Indexed: 11/29/2022]
Abstract
The tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) is a powerful lung carcinogen in animal models and is considered a causative factor for lung cancer in tobacco users. NNK is stereoselectively and reversibly metabolized to 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL), which is also a lung carcinogen. Both NNK and NNAL undergo metabolic activation by α-hydroxylation on their methyl groups to form pyridyloxobutyl and pyridylhydroxybutyl DNA base and phosphate adducts, respectively. α-Hydroxylation also occurs on the α-methylene carbons of NNK and NNAL to produce methane diazohydroxide, which reacts with DNA to form methyl DNA base adducts. DNA adducts of NNK and NNAL are important in their mechanisms of carcinogenesis. In this study, we characterized and quantified methyl DNA phosphate adducts in the lung of rats treated with 5 ppm of NNK, (S)-NNAL, or (R)-NNAL in drinking water for 10, 30, 50, and 70 weeks, by using a novel liquid chromatography-nanoelectrospray ionization-high resolution tandem mass spectrometry method. A total of 23, 21, and 22 out of 32 possible methyl DNA phosphate adducts were detected in the lung tissues of rats treated with NNK, (S)-NNAL, and (R)-NNAL, respectively. Levels of the methyl DNA phosphate adducts were 2290-4510, 872-1120, and 763-1430 fmol/mg DNA, accounting for 15-38%, 8%, and 5-9% of the total measured DNA adducts in rats treated with NNK, (S)-NNAL, and (R)-NNAL, respectively. The methyl DNA phosphate adducts characterized in this study further enriched the diversity of DNA adducts formed by NNK and NNAL. These results provide important new data regarding NNK- and NNAL-derived DNA damage and new insights pertinent to future mechanistic and biomonitoring studies of NNK, NNAL, and other chemical methylating agents.
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Affiliation(s)
- Bin Ma
- Masonic Cancer Center, University of Minnesota, 2231 Sixth Street SE, 2-152 CCRB, Minneapolis, Minnesota 55455, United States
| | - Adam T. Zarth
- Masonic Cancer Center, University of Minnesota, 2231 Sixth Street SE, 2-152 CCRB, Minneapolis, Minnesota 55455, United States
| | - Erik S. Carlson
- Masonic Cancer Center, University of Minnesota, 2231 Sixth Street SE, 2-152 CCRB, Minneapolis, Minnesota 55455, United States
| | - Peter W. Villalta
- Masonic Cancer Center, University of Minnesota, 2231 Sixth Street SE, 2-152 CCRB, Minneapolis, Minnesota 55455, United States
| | - Pramod Upadhyaya
- Masonic Cancer Center, University of Minnesota, 2231 Sixth Street SE, 2-152 CCRB, Minneapolis, Minnesota 55455, United States
| | - Irina Stepanov
- Masonic Cancer Center, University of Minnesota, 2231 Sixth Street SE, 2-152 CCRB, Minneapolis, Minnesota 55455, United States
| | - Stephen S. Hecht
- Masonic Cancer Center, University of Minnesota, 2231 Sixth Street SE, 2-152 CCRB, Minneapolis, Minnesota 55455, United States
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17
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Van der Fels-Klerx HJ, Van Asselt ED, Raley M, Poulsen M, Korsgaard H, Bredsdorff L, Nauta M, D'agostino M, Coles D, Marvin HJP, Frewer LJ. Critical review of methods for risk ranking of food-related hazards, based on risks for human health. Crit Rev Food Sci Nutr 2017; 58:178-193. [PMID: 26857813 DOI: 10.1080/10408398.2016.1141165] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This study aimed to critically review methods for ranking risks related to food safety and dietary hazards on the basis of their anticipated human health impacts. A literature review was performed to identify and characterize methods for risk ranking from the fields of food, environmental science and socio-economic sciences. The review used a predefined search protocol, and covered the bibliographic databases Scopus, CAB Abstracts, Web of Sciences, and PubMed over the period 1993-2013. All references deemed relevant, on the basis of predefined evaluation criteria, were included in the review, and the risk ranking method characterized. The methods were then clustered-based on their characteristics-into eleven method categories. These categories included: risk assessment, comparative risk assessment, risk ratio method, scoring method, cost of illness, health adjusted life years (HALY), multi-criteria decision analysis, risk matrix, flow charts/decision trees, stated preference techniques and expert synthesis. Method categories were described by their characteristics, weaknesses and strengths, data resources, and fields of applications. It was concluded there is no single best method for risk ranking. The method to be used should be selected on the basis of risk manager/assessor requirements, data availability, and the characteristics of the method. Recommendations for future use and application are provided.
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Affiliation(s)
- H J Van der Fels-Klerx
- a RIKILT, Wageningen University and Research Centre , Akkermaalsbos 2, Wageningen , the Netherlands
| | - E D Van Asselt
- a RIKILT, Wageningen University and Research Centre , Akkermaalsbos 2, Wageningen , the Netherlands
| | - M Raley
- b University of Newcastle , School of Agriculture, Food and Rural Development , Agriculture Building, Newcastle Upon Tyne , United Kingdom
| | - M Poulsen
- c Technical University of Denmark, National Food Institute , Soborg , Denmark
| | - H Korsgaard
- c Technical University of Denmark, National Food Institute , Soborg , Denmark
| | - L Bredsdorff
- c Technical University of Denmark, National Food Institute , Soborg , Denmark
| | - M Nauta
- c Technical University of Denmark, National Food Institute , Soborg , Denmark
| | - M D'agostino
- d Food and Environmental Research Agency, Sand Hutton , York , North Yorkshire , United Kingdom
| | - D Coles
- b University of Newcastle , School of Agriculture, Food and Rural Development , Agriculture Building, Newcastle Upon Tyne , United Kingdom
| | - H J P Marvin
- a RIKILT, Wageningen University and Research Centre , Akkermaalsbos 2, Wageningen , the Netherlands
| | - L J Frewer
- b University of Newcastle , School of Agriculture, Food and Rural Development , Agriculture Building, Newcastle Upon Tyne , United Kingdom
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18
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Assunção R, Silva M, Alvito P. Challenges in risk assessment of multiple mycotoxins in food. WORLD MYCOTOXIN J 2016. [DOI: 10.3920/wmj2016.2039] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Most fungi are able to produce several mycotoxins simultaneously and, consequently, to contaminate a wide variety of foodstuffs. Therefore, the risk of human co-exposure to multiple mycotoxins is real, raising a growing concern about their potential impact on human health. Besides, government and industry regulations are usually based on individual toxicities, and do not take into account the complex dynamics associated with interactions between co-occurring groups of mycotoxins. The present work assembles, for the first time, the challenges posed by the likelihood of human co-exposure to these toxins and the possibility of interactive effects occurring after absorption, towards knowledge generation to support a more accurate human risk assessment. Regarding hazard assessment, a physiologically-based framework is proposed in order to infer the health effects from exposure to multiple mycotoxins in food, including knowledge on the bioaccessibility, toxicokinetics and toxicodynamics of single and combined toxins. The prioritisation of the most relevant mixtures to be tested under experimental conditions that attempt to mimic human exposure and the use of adequate mathematical approaches to evaluate interactions, particularly concerning the combined genotoxicity, were identified as the main challenges for hazard assessment. Regarding exposure assessment, the need of harmonised food consumption data, availability of multianalyte methods for mycotoxin quantification, management of left-censored data, use of probabilistic models and multibiomarker approaches are highlighted, in order to develop a more precise and realistic exposure assessment. To conclude, further studies on hazard and exposure assessment of multiple mycotoxins, using harmonised methodologies, are crucial towards an improvement of data quality and a more reliable and robust risk characterisation, which is central for risk management and, consequently, to prevent mycotoxins-associated adverse effects. A deep understanding of the nature of interactions between multiple mycotoxins will contribute to draw real conclusions on the health impact of human exposure to mycotoxin mixtures.
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Affiliation(s)
- R. Assunção
- Food and Nutrition Department, National Institute of Health Doutor Ricardo Jorge, I.P. (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal
- Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Campus de Santiago 3810-193 Aveiro, Portugal
- IIFA, Universidade de Évora, Palácio do Vimioso, Largo Marquês de Marialva, Apartado 94, 7002-554 Évora, Portugal
| | - M.J. Silva
- Department of Human Genetics, National Institute of Health Doutor Ricardo Jorge, I.P. (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal
- Center for Toxicogenomics and Human Health (ToxOmics), Nova Medical School, FCM-UNL, Campo Mártires da Pátria 130, 1169-056 Lisbon, Portugal
| | - P. Alvito
- Food and Nutrition Department, National Institute of Health Doutor Ricardo Jorge, I.P. (INSA), Av. Padre Cruz, 1649-016 Lisbon, Portugal
- Centre for Environmental and Marine Studies (CESAM), University of Aveiro, Campus de Santiago 3810-193 Aveiro, Portugal
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19
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Risks for human health related to the presence of 3‐ and 2‐monochloropropanediol (MCPD), and their fatty acid esters, and glycidyl fatty acid esters in food. EFSA J 2016. [DOI: 10.2903/j.efsa.2016.4426] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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20
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Herrmann S, Duedahl-Olesen L, Christensen T, Olesen P, Granby K. Dietary exposure to volatile and non-volatile N-nitrosamines from processed meat products in Denmark. Food Chem Toxicol 2015; 80:137-143. [DOI: 10.1016/j.fct.2015.03.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2014] [Revised: 03/10/2015] [Accepted: 03/11/2015] [Indexed: 01/23/2023]
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21
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Virgilio A, Sinisi A, Russo V, Gerardo S, Santoro A, Galeone A, Taglialatela-Scafati O, Roperto F. Ptaquiloside, the major carcinogen of bracken fern, in the pooled raw milk of healthy sheep and goats: an underestimated, global concern of food safety. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:4886-4892. [PMID: 25932502 DOI: 10.1021/acs.jafc.5b01937] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Bracken fern (Pteridium aquilinum) is a worldwide plant containing toxic substances, which represent an important chemical hazard for animals, including humans. Ptaquiloside, 1, a norsesquiterpenoid glucoside, is the major carcinogen of bracken detected in the food chain, particularly in the milk from farm animals. To date, ptaquiloside has been shown in the milk of cows feeding on a diet containing bracken fern. This is the first study that shows the systematic detection of ptaquiloside, 1, and reports its direct quantitation in pooled raw milk of healthy sheep and goats grazing on bracken. Ptaquiloside, 1, was detected by a sensitive method based on the chemical conversion of ptaquiloside, 1, into bromopterosine, 4, following gas chromatography-mass spectrometry (GC-MS) analysis. The presence of ptaquiloside, 1, possibly carcinogenic to humans, in the milk of healthy animals is an unknown potential health risk, thus representing a harmful and potential global concern of food safety.
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Affiliation(s)
- Antonella Virgilio
- †Department of Pharmacy, Naples University Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Annamaria Sinisi
- †Department of Pharmacy, Naples University Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | - Valeria Russo
- ‡Department of Veterinary Medicine and Animal Productions, Naples University Federico II, Via Delpino 1, 80137 Naples, Italy
| | - Salvatore Gerardo
- §Assessorato Politiche della Persona, Ufficio Veterinario, Igiene Alimenti, Tutela Sanitaria Consumatori, Regione Basilicata, Viale Verrastro 9, 85100 Potenza, Italy
| | - Adriano Santoro
- ‡Department of Veterinary Medicine and Animal Productions, Naples University Federico II, Via Delpino 1, 80137 Naples, Italy
| | - Aldo Galeone
- †Department of Pharmacy, Naples University Federico II, Via D. Montesano 49, 80131 Naples, Italy
| | | | - Franco Roperto
- #Department of Biology, Naples University Federico II, Via Cinzia 21, 80126 Naples, Italy
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22
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Raju J, Roberts J, Taylor M, Patry D, Chomyshyn E, Caldwell D, Cooke G, Mehta R. Toxicological effects of short-term dietary acrylamide exposure in male F344 rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2015; 39:85-92. [PMID: 25473820 DOI: 10.1016/j.etap.2014.11.009] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 11/16/2014] [Indexed: 06/04/2023]
Abstract
We recently reported that acrylamide, a known rodent and probable human carcinogen, does not increase the risk of azoxymethane (AOM)-induced rat colon precancerous lesions when administered through the diet. Here, we present toxicological data from non-AOM-injected rats. Briefly, male F344 rats were randomized into four dietary groups and received experimental diets based on AIN-93G formulation and containing acrylamide at 0 (control), 5, 10 or 50mg/kg diet (wt/wt) ad libitum for 10 weeks, after which they were killed and their blood collected for hematological and biochemical markers. Acrylamide at the higher doses (10 and 50mg/kg diet) significantly lowered (p<0.05) serum total high density lipoprotein and total testosterone and increased serum lipase in comparison to the control. Blood hematocrit values and lymphocyte counts were significantly lower (p<0.05) in the high dose acrylamide (50mg/kg diet) group compared to control, with a concomitant decrease in hemoglobin level, mean corpuscular volume and mean corpuscular hemoglobin. These results provide additional hazard characterization data and strengthen the notion that at high doses, acrylamide may involve systemic toxicity potentiating tumorigenesis in experimental animals. Further studies are required to understand the health effects of food-borne acrylamide, especially at the lower exposures typified by human diets.
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Affiliation(s)
- Jayadev Raju
- Regulatory Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, Canada.
| | - Jennifer Roberts
- Regulatory Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, Canada
| | - Marnie Taylor
- Regulatory Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, Canada
| | - Dominique Patry
- Scientific Services Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, Canada
| | - Emily Chomyshyn
- Scientific Services Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, Canada
| | - Don Caldwell
- Scientific Services Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, Canada
| | - Gerard Cooke
- Regulatory Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, Canada
| | - Rekha Mehta
- Regulatory Toxicology Research Division, Bureau of Chemical Safety, Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, Canada
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23
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Human health risk assessment of nitrosamines and nitramines for potential application in CO2 capture. Regul Toxicol Pharmacol 2014; 69:250-5. [DOI: 10.1016/j.yrtph.2014.04.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 04/08/2014] [Accepted: 04/09/2014] [Indexed: 11/24/2022]
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24
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Villarini M, Pagiotti R, Dominici L, Fatigoni C, Vannini S, Levorato S, Moretti M. Investigation of the cytotoxic, genotoxic, and apoptosis-inducing effects of estragole isolated from fennel (Foeniculum vulgare). JOURNAL OF NATURAL PRODUCTS 2014; 77:773-778. [PMID: 24617303 DOI: 10.1021/np400653p] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The present study was undertaken to evaluate, in the HepG2 human hepatoma cell line, the in vitro cytotoxic, genotoxic, and apoptotic activities of estragole (1), contained in the essential oil of Foeniculum vulgare (fennel) and suspected to induce hepatic tumors in susceptible strains of mice. Toward this end, an MTT cytotoxicity assay, a trypan blue dye exclusion test, a double-staining (acridine orange and DAPI) fluorescence viability assay, a single-cell microgel-electrophoresis (comet) assay, a mitochondrial membrane potential (Δψm) assay, and a DNA fragmentation analysis were conducted. In terms of potential genotoxic effects, the comet assay indicated that estragole (1) was not able to induce DNA damage nor apoptosis under the experimental conditions used.
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Affiliation(s)
- Milena Villarini
- Department of Pharmaceutical Sciences (Unit of Public Health), University of Perugia , Via del Giochetto, 06122 Perugia, Italy
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25
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Le Vee M, Kolasa E, Jouan E, Collet N, Fardel O. Differentiation of human placental BeWo cells by the environmental contaminant benzo(a)pyrene. Chem Biol Interact 2014; 210:1-11. [DOI: 10.1016/j.cbi.2013.12.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 11/22/2013] [Accepted: 12/09/2013] [Indexed: 12/15/2022]
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26
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Inhibitory potency of 4-carbon alkanes and alkenes toward CYP2E1 activity. Toxicology 2014; 318:51-8. [PMID: 24561005 DOI: 10.1016/j.tox.2014.02.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 01/24/2014] [Accepted: 02/10/2014] [Indexed: 02/07/2023]
Abstract
CYP2E1 has been implicated in the bioactivation of many small molecules into reactive metabolites which form adducts with proteins and DNA, and thus a better understanding of the molecular determinants of its selectivity are critical for accurate toxicological predictions. In this study, we determined the potency of inhibition of human CYP2E1 for various 4-carbon alkanes, alkenes and alcohols. In addition, known CYP2E1 substrates and inhibitors including 4-methylpyrazole, aniline, and dimethylnitrosamine were included to determine their relative potencies. Of the 1,3-butadiene-derived metabolites studied, 3,4-epoxy-1-butene was the strongest inhibitor with an IC50 of 110 μM compared to 1700 μM and 6600 μM for 1,2-butenediol and 1,2:3,4-diepoxybutane, respectively. Compared to known inhibitors, inhibitory potency of 3,4-epoxy-1-butene is between 4-methylpyrazole (IC50 = 1.8 μM) and dimethylnitrosamine (IC50 = 230 μM). All three butadiene metabolites inhibit CYP2E1 activity through a simple competitive mechanism. Among the 4-carbon compounds studied, the presence and location of polar groups seems to influence inhibitory potency. To further examine this notion, the investigation was extended to include structurally and chemically similar analogues, including propylene oxide and various butane alcohols. Those results demonstrated preferential recognition of CYP2E1 toward the type and location of polar and hydrophobic structural elements. Taken together, CYP2E1 metabolism may be modified in vivo by exposure to 4-carbon compounds, such as drugs, and nutritional constituents, a finding that highlights the complexity of exposure to mixtures.
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27
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Tung EW, Philbrook NA, Belanger CL, Ansari S, Winn LM. Benzo[a]pyrene increases DNA double strand break repair in vitro and in vivo: A possible mechanism for benzo[a]pyrene-induced toxicity. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2014; 760:64-9. [DOI: 10.1016/j.mrgentox.2013.12.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 12/23/2013] [Accepted: 12/24/2013] [Indexed: 01/08/2023]
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28
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Endocrine effects of chemicals: Aspects of hazard identification and human health risk assessment. Toxicol Lett 2013; 223:280-6. [DOI: 10.1016/j.toxlet.2013.03.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 02/27/2013] [Accepted: 03/08/2013] [Indexed: 01/26/2023]
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29
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Zhao X, Schaffner DW, Yue T. Quantification of aflatoxin risk associated with Chinese spices: Point and probability risk assessments for aflatoxin B1. Food Control 2013. [DOI: 10.1016/j.foodcont.2013.03.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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30
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Abstract
This study was conducted to investigate the occurrence of aflatoxin M1 (AFM1) in milk products in China using the competitive enzyme-linked immunosorbent assay method and to estimate the dietary exposure to this toxin through a probabilistic approach. Based on the exposure assessment results, a quantitative cancer potency formula developed by the Joint Food and Agriculture Organization and World Health Organization Expert Committee on Food Additives was applied to assess the cancer risk. AFM1 was detected in 48.07% of the milk samples and 4.49% of the yoghurt samples. No samples contained AFM1 above the current regulatory limit in China. The simulated AFM1 intake (90% confidence interval) in various sex-age groups ranged from 0.023 (0.021 to 0.023) ng/kg of body weight per day for 30- to 45-year-old men to 0.382 (0.354 to 0.386) ng/kg of body weight per day for 2- to 4-year-old girls at the 99th percentile. The cancer risk of AFM1 to the general population of China was assessed to be 0.129 cancer cases per year per 10(8) persons at the 99th percentile. These results indicate that the health risk associated with AFM1 in milk in China is relatively low.
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Affiliation(s)
- Yaodong Guo
- College of Food Science & Engineering, Northwest A&F University, Yangling, ShaanXi 712100, PR China.
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31
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32
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Can estragole in fennel seed decoctions really be considered a danger for human health? A fennel safety update. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 2012:860542. [PMID: 22899959 PMCID: PMC3414240 DOI: 10.1155/2012/860542] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Accepted: 06/20/2012] [Indexed: 01/11/2023]
Abstract
Fennel (Foeniculum vulgare Mill.) mature fruit (commonly known as seeds) and essential oil of fennel are widely used as flavoring agents in food products such as liqueurs, bread, cheese, and an ingredient of cosmetics and pharmaceutical products. Moreover fennel infusions are the classical decoction for nursing babies to prevent flatulence and colic spasm. Traditionally in Europe and Mediterranean areas fennel is used as antispasmodic, diuretic, anti-inflammatory, analgesic, secretomotor, secretolytic, galactagogue, eye lotion, and antioxidant remedy and integrator. Topically, fennel powder is used as a poultice for snake bites. In Asian cultures fennel was ingested to speed the elimination of poisons. As one of the ancient Saxon people's nine sacred herbs, fennel was credited with the power to cure. Fennel was also valued as a magic herb: in the Middle Ages it was draped over doorways on Midsummer's Eve to protect the household from evil spirits. Recently because of estragole carcinogenicity, fennel has been charged to be dangerous for humans especially if used as decoction for babies. But this allegation do not consider the remedy is prepared as a matrix of substances, and recent researches confirm that pure estragole is inactivated by many substance contained in the decoction.
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Singla V, Pachauri T, Satsangi A, Kumari KM, Lakhani A. Comparison of BTX profiles and their mutagenicity assessment at two sites of Agra, India. ScientificWorldJournal 2012; 2012:272853. [PMID: 22629126 PMCID: PMC3353290 DOI: 10.1100/2012/272853] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2011] [Accepted: 11/30/2011] [Indexed: 11/17/2022] Open
Abstract
In the present study, the concentrations of three volatile organic compounds (VOCs), namely, acronym for benzene, toluene, and xylenes (BTX) were assessed because of their role in the tropospheric chemistry. Two representative sites, a roadside and a petrol pump, were chosen for sample collection. VOCs were collected using SKC-activated charcoal tubes and SKC personal sampler and characterized by gas chromatograph using flame ionization detector. Among BTX, benzene had the highest concentration. At the roadside, mean concentration of benzene, toluene, o-,m-xylene, and p-xylene were 14.7 ± 2.4 μgm(-3), 8.1 ± 1.2 μgm(-3), 2.1 ± 0.8 μgm(-3), and 5.1 ± 1.2 μgm(-3), respectively. At the petrol pump, the mean concentrations of benzene, toluene, o-,m-xylene and p-xylene were 19.5 ± 3.7 μgm(-3), 12.9 ± 1.1 μgm(-3), 3.6 ± 0.5 μgm(-3) and 11.1 ± 1.5 μgm(-3), respectively, and were numerically higher by a fraction of 2. Monthly variation of BTX showed maximum concentration in winter. Inter-species ratios and inter-species correlation indicated traffic as the major source of BTX. Extracts of samples were positive in both Salmonella typhimurium tester strains TA98 and TA100 without metabolic activation suggesting the presence of direct mutagens in ambient air that can cause both frame-shift and base-pair mutation. The mutagenic response was greater for TA100 than TA98 suggesting greater activity for base-pair mutagenicity than frame-shift mutagenicity and was found to be statistically significant.
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Affiliation(s)
- Vyoma Singla
- Department of Chemistry, Faculty of Science, Dayalbagh Educational Institute, Dayalbagh, Agra 282110, India
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Caldas ED, Jardim ANO. Exposure to toxic chemicals in the diet: is the Brazilian population at risk? JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2012; 22:1-15. [PMID: 21989502 DOI: 10.1038/jes.2011.35] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Accepted: 07/18/2011] [Indexed: 05/31/2023]
Abstract
In Brazil, in the last 20 years, dietary risk assessments have been conducted on pesticides, mycotoxins, food additives, heavy metals (mainly mercury), environmental contaminants (mainly DDT) and acrylamide, a compound formed during food processing. The objectives of this paper were to review these studies, discuss their limitations and uncertainties and identify the most critical chemicals that may pose a health risk to Brazilian consumers. The studies have shown that the cumulative intake of organophosphorus and carbamate pesticides by high consumers of fruits and vegetables may represent a health concern (up to 169% of the ARfD), although the benefits of consuming large portions of those foods most probably overcome the risks. High consumers of maize products may also be at risk due to the presence of fumonisin (355% of the PMTDI), a mycotoxin present at high levels in Brazilian maize. The studies conducted in the Brazilian Amazon have shown that riparian fish consumers are exposed to unsafe levels of mercury. However, this is a more complex issue, as mercury levels in the region are naturally high and the health benefits of a fish-based diet are well known. Studies conducted both in Brazil and internationally on acrylamide have shown that the exposure to this genotoxic compound, mainly from the consumption of French fries and potato chips, is of health concern. Reducing the population dietary exposure to toxic chemicals is a challenge for government authorities and food producers in all countries. Management strategies aimed at decreasing exposure to the critical chemicals identified in this review involve limiting the use or eliminating highly toxic pesticides, implementing good agricultural practices to decrease maize contamination by fumonisins, educating local fish-eating communities toward a fish diet less contaminated by mercury, and changing dietary habits concerning the consumption of fried potatoes, the main processed food containing acrylamide.
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Affiliation(s)
- Eloisa Dutra Caldas
- Laboratory of Toxicology, Department of Pharmaceutical Sciences, Faculty of Health Sciences, University of Brasília, Brasília, DF, Brazil.
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Turesky RJ, Le Marchand L. Metabolism and biomarkers of heterocyclic aromatic amines in molecular epidemiology studies: lessons learned from aromatic amines. Chem Res Toxicol 2011; 24:1169-214. [PMID: 21688801 PMCID: PMC3156293 DOI: 10.1021/tx200135s] [Citation(s) in RCA: 217] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Aromatic amines and heterocyclic aromatic amines (HAAs) are structurally related classes of carcinogens that are formed during the combustion of tobacco or during the high-temperature cooking of meats. Both classes of procarcinogens undergo metabolic activation by N-hydroxylation of the exocyclic amine group to produce a common proposed intermediate, the arylnitrenium ion, which is the critical metabolite implicated in toxicity and DNA damage. However, the biochemistry and chemical properties of these compounds are distinct, and different biomarkers of aromatic amines and HAAs have been developed for human biomonitoring studies. Hemoglobin adducts have been extensively used as biomarkers to monitor occupational and environmental exposures to a number of aromatic amines; however, HAAs do not form hemoglobin adducts at appreciable levels, and other biomarkers have been sought. A number of epidemiologic studies that have investigated dietary consumption of well-done meat in relation to various tumor sites reported a positive association between cancer risk and well-done meat consumption, although some studies have shown no associations between well-done meat and cancer risk. A major limiting factor in most epidemiological studies is the uncertainty in quantitative estimates of chronic exposure to HAAs, and thus, the association of HAAs formed in cooked meat and cancer risk has been difficult to establish. There is a critical need to establish long-term biomarkers of HAAs that can be implemented in molecular epidemioIogy studies. In this review, we highlight and contrast the biochemistry of several prototypical carcinogenic aromatic amines and HAAs to which humans are chronically exposed. The biochemical properties and the impact of polymorphisms of the major xenobiotic-metabolizing enzymes on the biological effects of these chemicals are examined. Lastly, the analytical approaches that have been successfully employed to biomonitor aromatic amines and HAAs, and emerging biomarkers of HAAs that may be implemented in molecular epidemiology studies are discussed.
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Affiliation(s)
- Robert J Turesky
- Division of Environmental Health Sciences, Wadsworth Center , Albany, New York 12201, United States.
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Janoszka B. HPLC-fluorescence analysis of polycyclic aromatic hydrocarbons (PAHs) in pork meat and its gravy fried without additives and in the presence of onion and garlic. Food Chem 2011. [DOI: 10.1016/j.foodchem.2010.11.097] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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An T, Sun L, Li G, Wan S. Gas-phase photocatalytic degradation and detoxification of o-toluidine: Degradation mechanism and Salmonella mutagenicity assessment of mixed gaseous intermediates. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcata.2010.10.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Boroushaki MT, Nikkhah E, Kazemi A, Oskooei M, Raters M. Determination of acrylamide level in popular Iranian brands of potato and corn products. Food Chem Toxicol 2010; 48:2581-4. [PMID: 20600544 DOI: 10.1016/j.fct.2010.06.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 06/04/2010] [Accepted: 06/07/2010] [Indexed: 10/19/2022]
Abstract
Acrylamide is a chemical found in starchy foods that have been cooked at high temperatures. These include crisps, chips, bread and crisp breads. It was first discovered by scientists in Sweden in 2002. The Objective of this study is to determine the level of acrylamide in popular Iranian brands of potato crisps and corn products, produced by domestic food industrial factories. For this reason 7 brands of potato and 8 brands of corn products (10 each) were collected, crashed and after preparing the extracts of each sample, using LC-MS-MS spectrometry for measuring acrylamide amount. Results showed that in different brands of potato and corn products there were different amounts (244-1688 microg/kg) and (<30-410 microg/kg) of acrylamide, respectively. As acrylamide is a dangerous toxin for human health, so it needs to reduce the level of acrylamide in these products that are used extensively by people specially children.
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Affiliation(s)
- Mohammad Taher Boroushaki
- Dept of Pharmacology and Pharmacological Research Center of Medicinal Plants, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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Hasegawa K, Miwa J. Genetic and cellular characterization of Caenorhabditis elegans mutants abnormal in the regulation of many phase II enzymes. PLoS One 2010; 5:e11194. [PMID: 20585349 PMCID: PMC2887452 DOI: 10.1371/journal.pone.0011194] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Accepted: 05/27/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The phase II detoxification enzymes execute a major protective role against xenobiotics as well as endogenous toxicants. To understand how xenobiotics regulate phase II enzyme expression, acrylamide was selected as a model xenobiotic chemical, as it induces a large number and a variety of phase II enzymes, including numerous glutathione S-transferases (GSTs) in Caenorhabditis elegans. METHODOLOGY/PRINCIPAL FINDINGS To begin dissecting genetically xenobiotics response pathways (xrep), 24 independent mutants of C. elegans that exhibited abnormal GST expression or regulation against acrylamide were isolated by screening about 3.5x10(5) genomes of gst::gfp transgenic strains mutagenized with ethyl methanesulfonate (EMS). Complementation testing assigned the mutants to four different genes, named xrep-1, -2, -3, and -4. One of the genes, xrep-1, encodes WDR-23, a nematode homologue of WD repeat-containing protein WDR23. Loss-of-function mutations in xrep-1 mutants resulted in constitutive expression of many GSTs and other phase II enzymes in the absence of acrylamide, and the wild-type xrep-1 allele carried on a DNA construct successfully cured the mutant phenotype of the constitutive enzyme expression. CONCLUSIONS/SIGNIFICANCE Genetic and cellular characterization of xrep-1 mutants suggest that a large number of GSTs and other phase II enzymes induced by acrylamide are under negative regulation by XREP-1 (WDR-23), which is likely to be a functional equivalent of mammalian Keap1 and a regulator of SKN-1, a C. elegans analogue of cap-n-collar Nrf2 (nuclear factor erythroid 2-related factor 2).
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Affiliation(s)
- Koichi Hasegawa
- College of Bioscience and Biotechnology, Chubu University, Kasugai, Aichi, Japan
| | - Johji Miwa
- College of Bioscience and Biotechnology, Chubu University, Kasugai, Aichi, Japan
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Karttunen V, Myllynen P, Prochazka G, Pelkonen O, Segerbäck D, Vähäkangas K. Placental transfer and DNA binding of benzo(a)pyrene in human placental perfusion. Toxicol Lett 2010; 197:75-81. [PMID: 20466050 DOI: 10.1016/j.toxlet.2010.04.028] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 04/28/2010] [Accepted: 04/30/2010] [Indexed: 01/05/2023]
Abstract
Benzo(a)pyrene (BP) is the best studied polycyclic aromatic hydrocarbon, classified as carcinogenic to humans. The carcinogenic metabolite, benzo(a)pyrene-7,8-dihydrodiol-9,10-epoxide (BPDE), binds covalently to DNA. The key enzyme in this metabolic reaction is CYP1A1, which has also been found in placenta and human trophoblastic cells. By using human placental perfusion we confirmed that BP added to the maternal circulation in concentrations of 0.1 and 1 microM reaches fetal compartment but somewhat slower than the freely diffusible reference substance antipyrine. A well-known P-glycoprotein (ABCB1/P-gp) antagonist verapamil did not affect the transfer more than it did in the case of antipyrine, indicating that ABCB1/P-gp does not have a role in BP transfer. In one of the two placentas perfused for 6 h with the higher concentration of BP (1 microM) BPDE specific DNA adducts were found in placental tissue after the perfusion, but not before. The ability of human trophoblastic cells to activate BP to BPDE-DNA adducts was confirmed in human trophoblastic BeWo cells. This study shows that maternal exposure to BP leads to the exposure of the fetus to BP and/or its metabolites and that placenta itself can activate BP to DNA adducts.
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Affiliation(s)
- Vesa Karttunen
- Faculty of Health Sciences, University of Eastern Finland, Kuopio, Finland
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Carthew P, DiNovi M, Setzer RW. Application of the margin of exposure (MoE) approach to substances in food that are genotoxic and carcinogenic: example: furan (CAS No. 110-00-9). Food Chem Toxicol 2010; 48 Suppl 1:S69-74. [PMID: 20113857 DOI: 10.1016/j.fct.2009.10.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 09/01/2009] [Accepted: 10/12/2009] [Indexed: 10/19/2022]
Abstract
Furan is commonly found in foods such as coffee, canned and jarred foods, including baby food containing meat, and various vegetables. It is thought to be formed by the thermal decomposition of carbohydrates. Furan is carcinogenic in rodents, although the detailed mechanism of action has not been completely established, for all the tumour types induced. Dose-response modelling of the data for hepatocellular tumours gives a BMDL10 of 1.23 mg/kg/day, and MOEs of between 750 and 4300 for exposures of infants and adults.
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Risk assessment of carcinogens in food. Toxicol Appl Pharmacol 2010; 243:180-90. [DOI: 10.1016/j.taap.2009.11.004] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 10/31/2009] [Accepted: 11/04/2009] [Indexed: 11/18/2022]
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Sun L, Li G, Wan S, An T. Mechanistic study and mutagenicity assessment of intermediates in photocatalytic degradation of gaseous toluene. CHEMOSPHERE 2010; 78:313-318. [PMID: 19900694 DOI: 10.1016/j.chemosphere.2009.10.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2009] [Revised: 09/26/2009] [Accepted: 10/09/2009] [Indexed: 05/28/2023]
Abstract
Photocatalytic oxidation is a promising technique for the degradation of volatile organic compounds. However, it is necessary to clarify the genotoxicity mutagenic potential of intermediates formed during photocatalytic degradation. A gas-solid TiO(2) thin film reactor was fabricated to degrade toluene under UV irradiation. The results showed that the degradation efficiencies of toluene at a concentration of about 1500 microg L(-1) reached almost 100% within 120 min of illumination. The intermediates produced during the photocatalytic degradation were identified by using gas chromatography-mass spectroscopy. Benzene was the only by-product identified in the gas phase, while small amounts of benzaldehyde and benzoic acid were detected at the TiO(2) surface. Species such as benzene and CO(2) should derive from the photo-decarboxylation of benzoic acid, produced by further oxidation of benzaldehyde. Neither the original toluene nor the gaseous intermediates produced at different times presented mutagenic activity to strains TA98 and TA100 in the presence or absence of the S9 mixture at the tested doses by using Ames assay. All of the results indicated that the effluent gas of toluene treated by photocatalysis will not cause mutagenic toxicity to humans or other organisms.
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Affiliation(s)
- Lei Sun
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou, China
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Theumer M, Cánepa M, López A, Mary V, Dambolena J, Rubinstein H. Subchronic mycotoxicoses in Wistar rats: Assessment of the in vivo and in vitro genotoxicity induced by fumonisins and aflatoxin B1, and oxidative stress biomarkers status. Toxicology 2010; 268:104-10. [DOI: 10.1016/j.tox.2009.12.007] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2009] [Revised: 11/16/2009] [Accepted: 12/07/2009] [Indexed: 10/20/2022]
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Rietjens IMCM, Punt A, Schilter B, Scholz G, Delatour T, van Bladeren PJ. In silico
methods for physiologically based biokinetic models describing bioactivation and detoxification of coumarin and estragole: Implications for risk assessment. Mol Nutr Food Res 2009; 54:195-207. [DOI: 10.1002/mnfr.200900211] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Gargas M, Kirman C, Sweeney L, Tardiff R. Acrylamide: Consideration of species differences and nonlinear processes in estimating risk and safety for human ingestion. Food Chem Toxicol 2009; 47:760-8. [DOI: 10.1016/j.fct.2008.12.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2008] [Revised: 12/17/2008] [Accepted: 12/24/2008] [Indexed: 10/21/2022]
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Bolt HM. The Concept of “Practical Thresholds” in the Derivation of Occupational Exposure Limits for Carcinogens by the Scientific Committee on Occupational Exposure Limits (SCOEL) of the European Union. Genes Environ 2008. [DOI: 10.3123/jemsge.30.114] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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