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Deng H, Talpur ZH, Wang K, Kang Y, Du Y, Xu D, Fan X, Li W. SERS determination of sodium saccharin content on the tipping paper of cigarettes using AgNP substrates prepared with a USB-power supply device. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:4524-4532. [PMID: 37622388 DOI: 10.1039/d3ay00818e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
A novel magnetic agitating heater powered by a USB port has been developed and applied to synthesize silver colloid substrate for surface-enhanced Raman scattering (SERS) detection of sodium saccharin content on the tipping paper of cigarettes. The heater device allows the convenient synthesis of the Ag colloid, and the reaction can be completed on-site in 15 min under mild conditions. The on-site synthesis of SERS substrate effectively avoided the need for storage and concerns regarding the poor stability and short lifespan of colloid substrates. The results demonstrated that the substrate obtained with the device could achieve SERS detection of Rhodamine 6G (R6G) at as low as 10-9 mol L-1 while maintaining a stable intensity with a relative standard deviation (RSD) of 5.52% (n = 5). Using the prepared substrate at the optimal conditions, the limit of detection of sodium saccharin (SS) was 1 mg L-1. By introducing an internal standard KSCN, a linear relationship was observed between the relative intensity at 708 cm-1 and the concentration of the SS in a range of 20-100 mg L-1 (R2 = 0.98). With the developed method, SS was directly extracted from the cigarette paper by immersing it in water, and the extracted solution was subsequently detected. The quantitative spike-recoveries were in the range of 95.5-116.7%, with RSD between 2.3-12.6%. The whole detection procedure including the on-site substrate preparation, took only about 30 min. This work opens new avenues for colloidal synthesis, and the detection method of SS on the cigarette paper also holds great promise in food safety applications.
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Affiliation(s)
- Huipeng Deng
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Zakir H Talpur
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Kaijun Wang
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Yan Kang
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Yiping Du
- Shanghai Key Laboratory of Functional Materials Chemistry, School of Chemistry & Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, PR China.
| | - Dongmei Xu
- China Tobacco Jiangsu Industrial Co. Ltd, Nanjing, 210019, China
| | - Xinglong Fan
- China Tobacco Jiangsu Industrial Co. Ltd, Nanjing, 210019, China
| | - Wei Li
- China Tobacco Jiangsu Industrial Co. Ltd, Nanjing, 210019, China
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Ionescu AC, Vezzoli E, Conte V, Sartori P, Procacci P, Brambilla E. Activity of Experimental Mouthwashes and Gels Containing DNA-RNA and Bioactive Molecules against the Oxidative Stress of Oral Soft Tissues: The Importance of Formulations. A Bioreactor-Based Reconstituted Human Oral Epithelium Model. Molecules 2021; 26:2976. [PMID: 34067773 PMCID: PMC8155942 DOI: 10.3390/molecules26102976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/07/2021] [Accepted: 05/13/2021] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND DNA-RNA compounds have shown promising protection against cell oxidative stress. This study aimed to assess the cytotoxicity, protective, or preventive effect of different experimental formulations on oral epithelia's oxidative stress in vitro. METHODS Reconstituted human oral epithelia (RHOE) were grown air-lifted in a continuous-flow bioreactor. Mouthwashes and gels containing DNA-RNA compounds and other bioactive molecules were tested on a model of oxidative stress generated by hydrogen peroxide treatment. Epithelia viability was evaluated using a biochemical MTT-based assay and confocal microscopy; structural and ultrastructural morphology was evaluated by light microscopy and TEM. RESULTS DNA-RNA showed non-cytotoxic activity and effectively protected against oxidative stress, but did not help in its prevention. Gel formulations did not express adequate activity compared to the mouthwashes. Excipients played a fundamental role in enhancing or even decreasing the bioactive molecules' effect. CONCLUSION A mouthwash formulation with hydrolyzed DNA-RNA effectively protected against oxidative stress without additional enhancement by other bioactive molecules. Active compounds, such as hyaluronic acid, β-Glucan, allantoin, bisabolol, ruscogenin, and essential oils, showed a protective effect against oxidative stress, which was not synergistic with the one of DNA-RNA. Incorporation of surfactant agents showed a reduced, yet significant, cytotoxic effect.
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Affiliation(s)
- Andrei C. Ionescu
- Oral Microbiology and Biomaterials Laboratory, Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, via Pascal, 36, 20133 Milan, Italy;
| | - Elena Vezzoli
- Electron Microscopy Laboratory, Department of Biomedical Sciences for Health, Università degli Studi di Milano, via G. Colombo, 71, 20133 Milan, Italy; (E.V.); (V.C.); (P.S.); (P.P.)
| | - Vincenzo Conte
- Electron Microscopy Laboratory, Department of Biomedical Sciences for Health, Università degli Studi di Milano, via G. Colombo, 71, 20133 Milan, Italy; (E.V.); (V.C.); (P.S.); (P.P.)
| | - Patrizia Sartori
- Electron Microscopy Laboratory, Department of Biomedical Sciences for Health, Università degli Studi di Milano, via G. Colombo, 71, 20133 Milan, Italy; (E.V.); (V.C.); (P.S.); (P.P.)
| | - Patrizia Procacci
- Electron Microscopy Laboratory, Department of Biomedical Sciences for Health, Università degli Studi di Milano, via G. Colombo, 71, 20133 Milan, Italy; (E.V.); (V.C.); (P.S.); (P.P.)
| | - Eugenio Brambilla
- Oral Microbiology and Biomaterials Laboratory, Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, via Pascal, 36, 20133 Milan, Italy;
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Hwang SH, Yeom H, Han BI, Ham BJ, Lee YM, Han MR, Lee M. Predicting Carcinogenic Mechanisms of Non-Genotoxic Carcinogens via Combined Analysis of Global DNA Methylation and In Vitro Cell Transformation. Int J Mol Sci 2020; 21:ijms21155387. [PMID: 32751172 PMCID: PMC7432388 DOI: 10.3390/ijms21155387] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/17/2020] [Accepted: 07/27/2020] [Indexed: 12/13/2022] Open
Abstract
An in vitro cell transformation assay (CTA) is useful for the detection of non-genotoxic carcinogens (NGTXCs); however, it does not provide information on their modes of action. In this study, to pursue a mechanism-based approach in the risk assessment of NGTXCs, we aimed to develop an integrated strategy comprising an in vitro Bhas 42 CTA and global DNA methylation analysis. For this purpose, 10 NGTXCs, which were also predicted to be negative through Derek/Sarah structure-activity relationship analysis, were first tested for transforming activity in Bhas 42 cells. Methylation profiles using reduced representation bisulfite sequencing were generated for seven NGTXCs that were positive in CTAs. In general, the differentially methylated regions (DMRs) within promoter regions showed slightly more bias toward hypermethylation than the DMRs across the whole genome. We also identified 13 genes associated with overlapping DMRs within the promoter regions in four NGTXCs, of which seven were hypermethylated and six were hypomethylated. Using ingenuity pathway analysis, the genes with DMRs at the CpG sites were found to be enriched in cancer-related categories, including "cell-to-cell signaling and interaction" as well as "cell death and survival". Moreover, the networks related to "cell death and survival", which were considered to be associated with carcinogenesis, were identified in six NGTXCs. These results suggest that epigenetic changes supporting cell transformation processes occur during non-genotoxic carcinogenesis. Taken together, our combined system can become an attractive component for an integrated approach for the testing and assessment of NGTXCs.
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Affiliation(s)
- Sung-Hee Hwang
- Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon 22012, Korea; (S.-H.H.); (H.Y.)
| | - Hojin Yeom
- Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon 22012, Korea; (S.-H.H.); (H.Y.)
| | - Byeal-I Han
- Institute for New Drug Development, Incheon National University, Incheon 22012, Korea;
| | - Byung-Joo Ham
- Department of Psychiatry, Korea University Anam Hospital, Korea University College of Medicine, Seoul 02841, Korea;
| | - Yong-Moon Lee
- College of Pharmacy and Medical Research Center, Chungbuk National University, Cheoungju-si, Chungcheongbuk-do 28160, Korea;
| | - Mi-Ryung Han
- Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon 22012, Korea; (S.-H.H.); (H.Y.)
- Institute for New Drug Development, Incheon National University, Incheon 22012, Korea;
- INU Human Genome Center, Incheon National University, Incheon 22012, Korea
- Correspondence: (M.-R.H.); (M.L.); Tel.: +82-32-835-8247 (M.L.)
| | - Michael Lee
- Division of Life Sciences, College of Life Sciences and Bioengineering, Incheon National University, Incheon 22012, Korea; (S.-H.H.); (H.Y.)
- Institute for New Drug Development, Incheon National University, Incheon 22012, Korea;
- INU Human Genome Center, Incheon National University, Incheon 22012, Korea
- Correspondence: (M.-R.H.); (M.L.); Tel.: +82-32-835-8247 (M.L.)
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Kumar M, Chail M. Sucrose and saccharin differentially modulate depression and anxiety-like behavior in diabetic mice: exposures and withdrawal effects. Psychopharmacology (Berl) 2019; 236:3095-3110. [PMID: 31073738 DOI: 10.1007/s00213-019-05259-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Accepted: 04/26/2019] [Indexed: 01/08/2023]
Abstract
RATIONALE Sugar has addictive potential owing to increase in monoaminergic-transmission at pleasure and reward centers of brain. Insulin dysfunction triggered synaptic monoamine deficit is associated with sugar overeating and craving-related psychological changes in diabetic patients. Sugar-substitute (saccharin) is non-caloric artificial sweetener that may alleviate brain disorders in diabetes. OBJECTIVES In present study, effects of sucrose and sugar-substitute (saccharin) exposures and withdrawal on depression and anxiety-like behavior in type 2 diabetic mice were assessed. METHODS Swiss albino mice were injected with streptozotocin (135 mg/kg). After induction of diabetes, mice were exposed to a two-bottle water-water, 10% sucrose-water, or 10% saccharin-water choice paradigm for 28 days. Separate groups were employed to assess withdrawal effect of sucrose or saccharin in diabetic mice. Monoamine oxidase (MAO), corticosterone, thiobarbituric acid reactive substances (TBARS), and reduced glutathione (GSH) were quantified after behavioral tests. RESULTS Diabetic mice manifested preference towards 10% sucrose or saccharin over water. Sucrose-overeating by diabetic mice amplified symptoms of depression and anxiety; however, withdrawal further exaggerated these behavioral abnormalities. Substitution of sucrose by 10% saccharin attenuated the depressive and anxiety-like behavior in comparison to diabetic mice that were exposed separately to water-water or sucrose-water alone, and with respect to normal mice. Although withdrawal from saccharin resurfaced behavioral anomalies in diabetic mice, however, these were significantly low in comparison with withdrawal from sucrose or normal group. Reinstatement of exposure to saccharin mitigated symptoms of depression and anxiety in diabetic mice. CONCLUSION Preference of sucrose overeating augments while saccharin mitigates depressive and anxiety behavior during diabetes.
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Affiliation(s)
- Manish Kumar
- Department of Pharmacology, Swift School of Pharmacy, Ghaggar Sarai, Rajpura, Punjab, 140401, India.
| | - Monica Chail
- Department of Pharmacology, Swift School of Pharmacy, Ghaggar Sarai, Rajpura, Punjab, 140401, India
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Serra-Majem L, Raposo A, Aranceta-Bartrina J, Varela-Moreiras G, Logue C, Laviada H, Socolovsky S, Pérez-Rodrigo C, Aldrete-Velasco JA, Meneses Sierra E, López-García R, Ortiz-Andrellucchi A, Gómez-Candela C, Abreu R, Alexanderson E, Álvarez-Álvarez RJ, Álvarez Falcón AL, Anadón A, Bellisle F, Beristain-Navarrete IA, Blasco Redondo R, Bochicchio T, Camolas J, Cardini FG, Carocho M, Costa MDC, Drewnowski A, Durán S, Faundes V, Fernández-Condori R, García-Luna PP, Garnica JC, González-Gross M, La Vecchia C, Leis R, López-Sobaler AM, Madero MA, Marcos A, Mariscal Ramírez LA, Martyn DM, Mistura L, Moreno Rojas R, Moreno Villares JM, Niño-Cruz JA, Oliveira MBPP, Palacios Gil-Antuñano N, Pérez-Castells L, Ribas-Barba L, Rincón Pedrero R, Riobó P, Rivera Medina J, Tinoco de Faria C, Valdés-Ramos R, Vasco E, Wac SN, Wakida G, Wanden-Berghe C, Xóchihua Díaz L, Zúñiga-Guajardo S, Pyrogianni V, Cunha Velho de Sousa S. Ibero⁻American Consensus on Low- and No-Calorie Sweeteners: Safety, Nutritional Aspects and Benefits in Food and Beverages. Nutrients 2018; 10:E818. [PMID: 29941818 PMCID: PMC6073242 DOI: 10.3390/nu10070818] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 06/07/2018] [Accepted: 06/20/2018] [Indexed: 02/07/2023] Open
Abstract
International scientific experts in food, nutrition, dietetics, endocrinology, physical activity, paediatrics, nursing, toxicology and public health met in Lisbon on 2⁻4 July 2017 to develop a Consensus on the use of low- and no-calorie sweeteners (LNCS) as substitutes for sugars and other caloric sweeteners. LNCS are food additives that are broadly used as sugar substitutes to sweeten foods and beverages with the addition of fewer or no calories. They are also used in medicines, health-care products, such as toothpaste, and food supplements. The goal of this Consensus was to provide a useful, evidence-based, point of reference to assist in efforts to reduce free sugars consumption in line with current international public health recommendations. Participating experts in the Lisbon Consensus analysed and evaluated the evidence in relation to the role of LNCS in food safety, their regulation and the nutritional and dietary aspects of their use in foods and beverages. The conclusions of this Consensus were: (1) LNCS are some of the most extensively evaluated dietary constituents, and their safety has been reviewed and confirmed by regulatory bodies globally including the World Health Organisation, the US Food and Drug Administration and the European Food Safety Authority; (2) Consumer education, which is based on the most robust scientific evidence and regulatory processes, on the use of products containing LNCS should be strengthened in a comprehensive and objective way; (3) The use of LNCS in weight reduction programmes that involve replacing caloric sweeteners with LNCS in the context of structured diet plans may favour sustainable weight reduction. Furthermore, their use in diabetes management programmes may contribute to a better glycaemic control in patients, albeit with modest results. LNCS also provide dental health benefits when used in place of free sugars; (4) It is proposed that foods and beverages with LNCS could be included in dietary guidelines as alternative options to products sweetened with free sugars; (5) Continued education of health professionals is required, since they are a key source of information on issues related to food and health for both the general population and patients. With this in mind, the publication of position statements and consensus documents in the academic literature are extremely desirable.
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Affiliation(s)
- Lluis Serra-Majem
- Institute of Biomedical and Health Sciences (IUIBS), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria 35016, Spain.
- Spanish Academy of Nutrition and Food Sciences (AEN), Barcelona 08029, Spain.
- Nutrition Research Foundation (FIN), University of Barcelona Science Park, Barcelona 08028, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBER OBN), Instituto de Salud Carlos III, Madrid 28029, Spain.
| | - António Raposo
- Research Center for Biosciences and Health Technologies-CBIOS, Universidade Lusófona de Humanidades e Tecnologias, Lisboa 1749-024, Portugal.
| | - Javier Aranceta-Bartrina
- Spanish Academy of Nutrition and Food Sciences (AEN), Barcelona 08029, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBER OBN), Instituto de Salud Carlos III, Madrid 28029, Spain.
- Spanish Society of Community Nutrition (SENC), Barcelona 08029, Spain.
- Department of Physiology, University of the Basque Country (UPV/EHU), Leioa (Bizkaia) 48940, Spain.
| | - Gregorio Varela-Moreiras
- Spanish Academy of Nutrition and Food Sciences (AEN), Barcelona 08029, Spain.
- Spanish Nutrition Foundation (FEN), Madrid 28010, Spain.
- Department of Pharmaceutical & Health Sciences, School of Pharmacy, CEU San Pablo University, Boadilla del Monte (Madrid) 28668, Spain.
| | - Caomhan Logue
- Nutritional Innovation Centre for Food & Health (NICHE), School of Biomedical Sciences, Ulster University, Coleraines BT52 1SA, UK.
| | - Hugo Laviada
- Research Department of Metabolism and Nutrition, Medical School, Marist University of Merida, Mérida Yucatan 97300, Mexico.
| | - Susana Socolovsky
- Argentine Association of Food Technologists, Buenos Aires 1088, Argentina.
| | - Carmen Pérez-Rodrigo
- Spanish Academy of Nutrition and Food Sciences (AEN), Barcelona 08029, Spain.
- Spanish Society of Community Nutrition (SENC), Barcelona 08029, Spain.
- Department of Physiology, University of the Basque Country (UPV/EHU), Leioa (Bizkaia) 48940, Spain.
| | | | - Eduardo Meneses Sierra
- Mexican College of Internal Medicine, Mexico City 03910, Mexico.
- Hospital General de Especialidades del ISSSTE, Saltillo, Coahuila 25020, Mexico.
| | | | - Adriana Ortiz-Andrellucchi
- Institute of Biomedical and Health Sciences (IUIBS), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria 35016, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBER OBN), Instituto de Salud Carlos III, Madrid 28029, Spain.
| | - Carmen Gómez-Candela
- Clinical Nutrition Department, La Paz University Hospital, Madrid 28046, Spain.
- Hospital La Paz Health Research Institute - IdiPAZ, Autonomous University of Madrid, Madrid 28046, Spain.
| | | | - Erick Alexanderson
- Nuclear Cardiology Department, Instituto Nacional de Cardiología "Ignacio Chávez, Tlalpan, Ciudad de Mexico 14080, Mexico.
- Phisiology Department, National Autonomous University of Mexico, Coyoacán, Ciudad de México 04510, Mexico.
- Mexican Society of Cardiology, México City 14080, Mexico.
| | | | - Ana Luisa Álvarez Falcón
- Institute of Biomedical and Health Sciences (IUIBS), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria 35016, Spain.
- Dr. Negrin University Hospital of Gran Canaria, Las Palmas de Gran Canaria 35010, Spain.
| | - Arturo Anadón
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Complutense University of Madrid, Madrid 28040, Spain.
| | - France Bellisle
- Nutritional Epidemiology Unit, University of Paris 13, Bobigny 93017, France.
| | | | - Raquel Blasco Redondo
- Regional Center for Sports Medicine of the Junta de Castilla y León, Valladolid 47011, Spain.
| | - Tommaso Bochicchio
- Facultad Mexicana de Medicina, La Salle University, Mexico 14000, D. F., Mexico.
- Mexican Transplant Institute, Cuernavaca, Morelos 62448, Mexico.
| | - José Camolas
- Serviço de Endocrinologia, Hospital de Santa Maria⁻CHLN, Lisboa 1649-035, Portugal.
| | - Fernando G Cardini
- Argentine Quality Institute-Instituto Argentino para la Calidad (IAPC), Ciudad Autónoma de Buenos Aires 1406, Argentina.
| | - Márcio Carocho
- Mountain Research Centre (CIMO), Polytechnic Institute of Bragança, Campus de Santa Apolónia, Bragança 5300-253, Portugal.
| | - Maria do Céu Costa
- ASAE-Autoridade de Segurança Alimentar e Económica, CBIOS/ECTS-The Biosciences Research Center and NICiTeS/ERISA⁻Núcleo de Investigação em Ciências e Tecnologias da Saúde, Grupo Lusófona, Lisboa 1749-024, Portugal.
| | - Adam Drewnowski
- Center for Public Health Nutrition, University of Washington-Center for Obesity Research, Seattle, WA 98195, USA.
| | - Samuel Durán
- Chilean College of Nutritionists, Universidad San Sebastian, Santiago 7500000, Chile.
| | - Víctor Faundes
- Nutrition and Food Technology Institute, University of Chile, Santiago 7830490, Chile.
| | | | - Pedro P García-Luna
- Andalusian Society of Endocrinology, Diabetes and Nutrition, Department of Endocrinology and Nutrition, Virgen del Rocio Hospital, Sevilla 41013, Spain.
| | | | - Marcela González-Gross
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBER OBN), Instituto de Salud Carlos III, Madrid 28029, Spain.
- ImFINE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Science-INEF, Universidad Politécnica de Madrid, Madrid 28040, Spain.
| | - Carlo La Vecchia
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milano 20133, Italy.
| | - Rosaura Leis
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBER OBN), Instituto de Salud Carlos III, Madrid 28029, Spain.
- School of Medicine and Dentistry, University of Santiago de Compostela, Santiago de Compostela 15782, Spain.
- Gastroenterology, Hepatology and Paediatric Nutrition Unit of the Santiago Clinical University Hospital, Santiago de Compostela 15706, Spain.
| | - Ana María López-Sobaler
- Department of Nutrition and Food Science, School of Pharmacy, Complutense University of Madrid (UCM), Madrid 28040, Spain.
| | | | - Ascensión Marcos
- Spanish Federation of Nutrition, Food and Dietetics Societies, Madrid 28918, Spain.
- Institute of Food Science, Technology and Nutrition (ICTAN); Spanish National Research Council (CSIC), Madrid 28040, Spain.
| | | | - Danika M Martyn
- Intertek, HERS, Cody Technology Park, Farnborough GU14 0LX, UK.
| | - Lorenza Mistura
- Council for Agricultural Research and Economics, Research Centre for Food and Nutrition, Rome 00178, Italy.
| | - Rafael Moreno Rojas
- Department of Food Science and Technology, University of Cordoba, Cordoba 14071, Spain.
| | | | - José Antonio Niño-Cruz
- Mexican Nephrological Research Institute, Mexico City 14080, Mexico.
- Departamento de Nefrología y Metabolismo Mineral, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Tlalpan-Ciudad de México 14080, Mexico.
| | | | - Nieves Palacios Gil-Antuñano
- Department of Medicine, Endocrinology and Nutrition, Sport Medicine Center, AEPSAD, High Sports Council, Madrid 28040, Spain.
| | | | - Lourdes Ribas-Barba
- Nutrition Research Foundation (FIN), University of Barcelona Science Park, Barcelona 08028, Spain.
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBER OBN), Instituto de Salud Carlos III, Madrid 28029, Spain.
| | - Rodolfo Rincón Pedrero
- Departamento de Educación Médica, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Tlalpan-Ciudad de México 14080, Mexico.
| | - Pilar Riobó
- Endocrinology and Nutrition Department, Fundación Jiménez Díaz Hospital, IDC Salud, Madrid 28040, Spain.
- Facultad de Medicina, Universidad Autónoma de Madrid, Ciudad Universitaria de Cantoblanco, Madrid 28049, Spain.
| | - Juan Rivera Medina
- Servicio de Gastroenterología, Hepatología y Nutrición del Instituto Nacional de Salud del Niño, Lima 15083, Peru.
- Departamento de Pediatría, Universidad Nacional Mayor de San Marcos, Lima 15083, Peru.
| | - Catarina Tinoco de Faria
- Institute of Biomedical and Health Sciences (IUIBS), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria 35016, Spain.
| | - Roxana Valdés-Ramos
- Faculty of Medicine, Autonomous University of the State of Mexico, Toluca 50180, Mexico.
| | - Elsa Vasco
- Instituto Nacional de Saúde Doutor Ricardo Jorge, Lisboa 1649-016, Portugal.
| | - Sandra N Wac
- Nutrition and Public Health Working Group, Argentine Nutrition Society, La Plata, Buenos Aires 1900, Argentina.
| | | | - Carmina Wanden-Berghe
- Scientific and Educational Committee, Spanish Society of Parenteral and Enteral Nutrition (SENPE), Barcelona 08017, Spain.
| | - Luis Xóchihua Díaz
- Instituto Nacional de Pediatria, Sociedad Mexicana de Pediatria, Insurgentes Cuicuilco, Ciudad de México 04530, Mexico.
| | - Sergio Zúñiga-Guajardo
- Mexican Diabetes Federation, Mexico. Facultad de Medicina y Hospital Universitario de la Universidad Autónoma de Nuevo León, Monterrey 64630, Mexico.
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Kim M, Lee G, Lim HS, Yun SS, Hwang M, Hong JH, Kwon H. Safety assessment of 16 sweeteners for the Korean population using dietary intake monitoring and poundage method. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 34:1500-1509. [PMID: 28699833 DOI: 10.1080/19440049.2017.1349344] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A sweetener is a food additive that imparts a sweet taste to food products. Sweeteners have been increasingly used in Korea since the approval of sodium saccharin and d-sorbitol in 1962. Unlike food contaminants, humans are exposed to food additives only through the consumption of processed food products. For exposure assessments of sweeteners, the dietary intakes of food products containing acesulfame-K, aspartame, saccharin-Na, and sucralose were determined, and the resulting calculated estimated daily intake (EDI) values were compared directly with each additive's ADI. The poundage method was used to calculate the daily intake per capita for 12 additional sweeteners, such as lactitol, for which appropriate analytical methods for food products do not exist. The risk, as evaluated by comparing the EDI with the ADI, was determined to be 2.9% for acesulfame-K, 0.8% for aspartame, 3.6% for saccharin-Na, 4.3% for steviol glycosides, and 2.1% for sucralose. No hazardous effect was predicted for the other 11 sweeteners, including lactitol.
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Affiliation(s)
- MeeKyung Kim
- a Food Safety Evaluation Department , National Institute of Food and Drug Safety Evaluation , Cheongju-si , Republic of Korea
| | - Gunyoung Lee
- a Food Safety Evaluation Department , National Institute of Food and Drug Safety Evaluation , Cheongju-si , Republic of Korea
| | - Ho Soo Lim
- a Food Safety Evaluation Department , National Institute of Food and Drug Safety Evaluation , Cheongju-si , Republic of Korea
| | - Sang Soon Yun
- a Food Safety Evaluation Department , National Institute of Food and Drug Safety Evaluation , Cheongju-si , Republic of Korea
| | - Myungsil Hwang
- a Food Safety Evaluation Department , National Institute of Food and Drug Safety Evaluation , Cheongju-si , Republic of Korea
| | - Jin-Hwan Hong
- a Food Safety Evaluation Department , National Institute of Food and Drug Safety Evaluation , Cheongju-si , Republic of Korea
| | - Hoonjeong Kwon
- b Department of Food and Nutrition , Seoul National University , Seoul , Republic of Korea
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Montijano H, Tomás-Barberán F, Borrego F. Propiedades tecnológicas y regulación de los edulcorantes de alta intensidad en la Unión Europea Technological properties and regulatory status of high intensity sweeteners in the European Union. FOOD SCI TECHNOL INT 2016. [DOI: 10.1177/108201329800400102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The European regulation of sweeteners has recently been changed with the publication and implementation by Member States of Directive 94/35/EC, which authorizes the use of six bulk sweeteners and six intense sweeteners for the formulation of reduced energy and/or non-sugar-added foods. An update of the technological properties of the high intensity sweeteners presently authorized in the EU is presented. We also report on the use of sweetener combinations as a means to optimize the sensory properties of the finished product and reduce sweetening costs.
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Affiliation(s)
- H. Montijano
- Departamento de I+D. Zoster, S A (Grupo Ferrer). Raiguero 143. 30588 Zeneta, Murcia. España
| | | | - F. Borrego
- Departamento de I+D. Zoster, S A (Grupo Ferrer). Raiguero 143. 30588 Zeneta, Murcia. España
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Mixed ligand palladium(II) complexes of N-hydroxy-methylsaccharin (Sac-CH2OH): synthesis, characterization and biological studies. TRANSIT METAL CHEM 2015. [DOI: 10.1007/s11243-015-9988-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Mercury(II) saccharinate (sac) complexes: Synthesis and molecular structures of [Hg(sac)2(2-ampy)2], [Hg(sac)2(2-ampy)(MeOH)], [Hg(sac)2(2-abt)(MeOH)], [Hg(sac)2(2-abt)(dmso)] (2-ampy=2-aminopyridine, 2-abt=2-aminobenzothiazole). Polyhedron 2014. [DOI: 10.1016/j.poly.2014.06.048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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In vitro DNA binding studies of the sweetening agent saccharin and its copper(II) and zinc(II) complexes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2014; 130:115-21. [DOI: 10.1016/j.jphotobiol.2013.11.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 10/30/2013] [Accepted: 11/01/2013] [Indexed: 12/15/2022]
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11
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Qin X. Etiology of inflammatory bowel disease: a unified hypothesis. World J Gastroenterol 2012; 18:1708-22. [PMID: 22553395 PMCID: PMC3332284 DOI: 10.3748/wjg.v18.i15.1708] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 02/20/2012] [Accepted: 02/26/2012] [Indexed: 02/06/2023] Open
Abstract
Inflammatory bowel disease (IBD), including both ulcerative colitis (UC) and Crohn's disease (CD), emerged and dramatically increased for about a century. Despite extensive research, its cause remains regarded as unknown. About a decade ago, a series of findings made me suspect that saccharin may be a key causative factor for IBD, through its inhibition on gut bacteria and the resultant impaired inactivation of digestive proteases and over digestion of the mucus layer and gut barrier (the Bacteria-Protease-Mucus-Barrier hypothesis). It explained many puzzles in IBD such as its emergence and temporal changes in last century. Recently I further found evidence suggesting sucralose may be also linked to IBD through a similar mechanism as saccharin and have contributed to the recent worldwide increase of IBD. This new hypothesis suggests that UC and CD are just two symptoms of the same morbidity, rather than two different diseases. They are both caused by a weakening in gut barrier and only differ in that UC is mainly due to increased infiltration of gut bacteria and the resultant recruitment of neutrophils and formation of crypt abscess, while CD is mainly due to increased infiltration of antigens and particles from gut lumen and the resultant recruitment of macrophages and formation of granulomas. It explained the delayed appearance but accelerated increase of CD over UC and many other phenomena. This paper aims to provide a detailed description of a unified hypothesis regarding the etiology of IBD, including the cause and mechanism of IBD, as well as the relationship between UC and CD.
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Ihlaseh SM, Bailey KA, Hester SD, Jones C, Ren H, Cardoso APF, Oliveira MLCS, Wolf DC, de Camargo JLV. Transcriptional Profile of Diuron-Induced Toxicity on the Urinary Bladder of Male Wistar Rats to Inform Mode of Action. Toxicol Sci 2011; 122:330-8. [DOI: 10.1093/toxsci/kfr108] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Tripathi M, Khanna SK, Das M. Usage of saccharin in food products and its intake by the population of Lucknow, India. ACTA ACUST UNITED AC 2007; 23:1265-75. [PMID: 17118869 DOI: 10.1080/02652030600944395] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
A survey of the usage patterns of the artificial sweetener, saccharin, in edible products and a study of its intake pattern in different population groups has been carried out. Of the different edible commodities, ice candy (87 samples) and crushed ice (14 samples), commonly consumed by children, and pan masala (16 samples) and pan flavourings (10 samples), consumed by the habitual population, were collected from different areas of Lucknow, India. Saccharin was extracted from the samples according to an AOAC method and analysed by HPLC. The consumption pattern of ice candy and crushed ice was determined for 6-20 year olds from a household dietary survey using the food frequency recall method (414 families having 1039 subjects). The consumption of pan masala and pan was assessed by a survey of habitual adult consumers comprising 782 and 1141 subjects, respectively. The average and maximum amounts of saccharin in pan masala samples were 12 750 and 24 300 mg kg-1, respectively, which are 1.6- and 3-fold higher than the maximum permitted levels allowed under Prevention of Food Adulteration (PFA) Act of India. In pan flavourings, the average and maximum amount of saccharin was 12.2 and 20.1%, i.e. 1.52- and 2.5-fold higher than the permissible limits of the PFA Act. The samples of ice candy and crushed ice showed average and maximum levels of 200 and 700 mg kg-1 and 280 and 460 mg kg-1, respectively. The average intake of saccharin through ice candy and crushed ice was less than 21% of the acceptable daily intake (ADI) (5 mg kg-1 body weight (bw) day-1). However, the maximum intake of saccharin, especially in the 6-10-year age group, contributed 57 and 68% of the ADI through ice candy and crushed ice, respectively. Maximum consumption of saccharin in all the age groups, if consuming both ice candy and crushed ice, results in exceeding the ADI by 54% for subjects in the 6-10-year age group. Hence, the 6-10-year age group population may be at risk of exceeding the ADI for saccharin. The average and maximum theoretical daily intake of saccharin through pan masala alone was 1.84 and 13.33 mg kg-1 bw day-1, contributing 37 and 267% of the ADI, whereas the estimated (maximum) daily intake was 810% of the ADI. The estimated maximum daily intake (EDI) of saccharin through pan was 6.87 mg kg-1 bw day-1, which was 137% of the ADI. Thus, individuals in the maximum consumption group for pan masala or pan may be susceptible to toxic effects of saccharin, including bladder distention, elevated urine osmolality and bladder cancer.
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Affiliation(s)
- Meenakshi Tripathi
- Food Toxicology Laboratory, Industrial Toxicology Research Centre, Mahatma Gandhi Marg, , P.O. Box 80, Lucknow 226001, India
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Tannehill-Gregg SH, Sanderson TP, Minnema D, Voelker R, Ulland B, Cohen SM, Arnold LL, Schilling BE, Waites CR, Dominick MA. Rodent Carcinogenicity Profile of the Antidiabetic Dual PPAR α and γ Agonist Muraglitazar. Toxicol Sci 2007; 98:258-70. [PMID: 17426106 DOI: 10.1093/toxsci/kfm083] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The carcinogenic potential of muraglitazar, a dual human peroxisome proliferator-activated receptor alpha/gamma agonist, was evaluated in 2-year studies in mice (1, 5, 20, and 40 mg/kg) and rats (1, 5, 30, and 50 mg/kg). Benign gallbladder adenomas occurred at low incidences in male mice at 20 and 40 mg/kg (area under the curve [AUC] exposures > or = 62 times human exposure at 5 mg/day) and were considered drug related due to an increased incidence of gallbladder mucosal hyperplasia at these doses. There was a dose-related increased incidence of transitional cell papilloma and carcinoma of the urinary bladder in male rats at 5, 30, and 50 mg/kg (AUC exposures > or = 8 times human exposure at 5 mg/day). At 30 and 50 mg/kg, the urinary bladder tumors were accompanied by evidence of increased urine solids. Subsequent investigative studies established that the urinary bladder carcinogenic effect was mediated by urolithiasis rather than a direct pharmacologic effect on urothelium. Incidences of subcutaneous liposarcoma in male rats and subcutaneous lipoma in female rats were increased at 50 mg/kg (AUC exposures > or = 48 times human exposure at 5 mg/day) and attributed, in part, to persistent pharmacologic stimulation of preadipocytes. Toxicologically relevant nonneoplastic changes in target tissues included thinning of cortical bone in mice and hyperplastic and metaplastic adipocyte changes in mice and rats. Considering that muraglitazar is nongenotoxic, the observed tumorigenic effects in mice and rats have no established clinical relevance since they occurred at either clinically nonrelevant exposures (gallbladder and adipose tumors) or by a species-specific mechanism (urinary bladder tumors).
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Affiliation(s)
- Sarah H Tannehill-Gregg
- Bristol-Myers Squibb Pharmaceutical Research Institute, Department of Drug Safety Evaluation Mt. Vernon, Indiana 47721, USA.
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Van Vleet TR, White MR, Sanderson TP, Cohen SM, Cano M, Arnold LL, Waites CR, Schilling BE, Mitroka J, Dominick MA. Subchronic Urinary Bladder Effects of Muraglitazar in Male Rats1. Toxicol Sci 2006; 96:58-71. [PMID: 17132713 DOI: 10.1093/toxsci/kfl176] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Muraglitazar, a PPARalpha/gamma dual agonist, was dosed orally to rats once daily for 13 weeks to evaluate urinary and urothelial changes of potential relevance to urinary bladder tumorigenesis. Groups of 17 young or aged rats per sex were fed a normal or 1% NH4Cl-supplemented diet and were dosed with 0, 1, or 50 mg/kg muraglitazar. Lithogenic ions and sediment were profiled from freshly voided urine samples collected 24 h after dosing, and drug exposures were measured. Urinary citrate, oxalate, and epidermal growth factor (EGF) were assayed from 18-h urine collections. Urothelium was assessed by light microscopy, scanning electron microscopy, and BrdU and TUNEL immunohistochemistry. When fed a normal diet, urine pH was higher in males (above 6.5). Urine volume/body weight was greater in females. Urine soluble/total calcium and magnesium and phosphorus/creatinine ratios were lower in male rats fed a normal diet. Urine citrate levels were decreased and oxalate was increased in young male rats treated with 50 mg/kg muraglitazar compared to age/sex/diet-matched controls. No changes in urine sediment were detected 24 h after dosing. In young male rats treated with 50 mg/kg on normal diet, multifocal urothelial necrosis and proliferation were observed, whereas urothelial apoptosis and urine EGF levels were unchanged compared to age/sex/diet-matched controls. Urothelial necrosis and proliferation were not correlated to systemic or urinary drug exposures and were prevented by dietary acidification. These data suggest that muraglitazar-associated changes in urine composition predispose to urothelial cytotoxicity and proliferation in the urinary bladder of young male rats and that urine sediment must be profiled at multiple daily timepoints to fully qualify drug-induced changes in urine composition.
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Affiliation(s)
- Terry R Van Vleet
- Departments of Drug Safety Evaluation, Bristol-Myers Squibb Company, Mt Vernon, Indiana 47721, USA
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Dasgupta J, Elliott RA, Doshani A, Tincello DG. Enhancement of rat bladder contraction by artificial sweeteners via increased extracellular Ca2+ influx. Toxicol Appl Pharmacol 2006; 217:216-24. [PMID: 17046038 DOI: 10.1016/j.taap.2006.09.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2006] [Revised: 08/10/2006] [Accepted: 09/05/2006] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Consumption of carbonated soft drinks has been shown to be independently associated with the development of overactive bladder symptoms (OR 1.62, 95% CI 1.18, 2.22) [Dallosso, H.M., McGrother, C.W., Matthews, R.J., Donaldson, M.M.K., 2003. The association of diet and other lifestyle factors with overactive bladder and stress incontinence: a longitudinal study in women. BJU Int. 92, 69-77]. We evaluated the effects of three artificial sweeteners, acesulfame K, aspartame and sodium saccharin, on the contractile response of isolated rat detrusor muscle strips. METHODS Strips of detrusor muscle were placed in an organ bath and stimulated with electrical field stimulation (EFS) in the absence and presence of atropine, and with alpha,beta methylene ATP, potassium, calcium and carbachol. RESULTS Sweeteners 10(-7) M to 10(-2) M enhanced the contractile response to 10 Hz EFS compared to control (p<0.01). The atropine-resistant response to EFS was marginally increased by acesulfame K 10(-6) M, aspartame 10(-7) M and sodium saccharin 10(-7) M. Acesulfame K 10(-6) M increased the maximum contractile response to alpha,beta methylene ATP by 35% (+/-9.6%) (p<0.05) and to KCl by 12% (+/-3.1%) (p<0.01). Sodium saccharin also increased the response to KCl by 37% (+/-15.2%) (p<0.05). These sweeteners shifted the calcium concentration-response curves to the left. Acesulfame K 10(-6) M increased the log EC(50) from -2.79 (+/-0.037) to -3.03 (+/-0.048, p<0.01) and sodium saccharin 10(-7) M from -2.74 (+/-0.03) to 2.86 (+/-0.031, p<0.05). The sweeteners had no significant effect on the contractile response to carbachol but they did increase the amplitude of spontaneous bladder contractions. DISCUSSION These results suggest that low concentrations of artificial sweeteners enhanced detrusor muscle contraction via modulation of L-type Ca(+2) channels.
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Affiliation(s)
- Jaydip Dasgupta
- University of Leicester, Prolapse and Incontinence Group, Reproductive Sciences Section, Department of Cancer Studies and Molecular Medicine, Robert Kilpatrick Clinical Sciences Building, Leicester Royal Infirmary, Leicester, LE2 7LX, UK
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Kroger M, Meister K, Kava R. Low-calorie Sweeteners and Other Sugar Substitutes: A Review of the Safety Issues. Compr Rev Food Sci Food Saf 2006. [DOI: 10.1111/j.1541-4337.2006.tb00081.x] [Citation(s) in RCA: 239] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bruemmer B, White E, Vaughan TL, Cheney CL. Fluid intake and the incidence of bladder cancer among middle-aged men and women in a three-county area of western Washington. Nutr Cancer 1998; 29:163-8. [PMID: 9427981 DOI: 10.1080/01635589709514619] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This population-based case-control study reports on the relationship between fluid intake and the incidence of bladder cancer among 262 bladder cancer cases from Western Washington and 405 controls identified through random-digit dialing Cases were identified from the Surveillance. Epidemiology, and End Results (SEER) registry and were diagnosed between January 1987 and June 1990. All eligible subjects were Caucasian 45- to 65-year-old residents of King, Pierce, or Snohomish counties and completed a structured telephone interview. Analyses were conducted by logistic regression with adjustment for age, county, and smoking (current, former, never). Among women there was a positive association between total fluid intake and the incidence of bladder cancer [p (trend = 0.02] and a moderate positive association between the use of decaffeinated coffee and the incidence of bladder cancer [p (trend) = 0.08]. Among men there was an inverse association between the consumption of regular soft drinks and the incidence of bladder cancer [p (trend) = 0.03]. No association was found between the incidence of bladder cancer and the intake of water, coffee, tea, diet soft drinks, alcohol, or liquids from tap for men or women. This study suggests that the intake of water and specific beverages is overall not associated with risks of bladder cancer. This study provides limited evidence of a positive association between total fluid intake and bladder cancer among women.
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Affiliation(s)
- B Bruemmer
- Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
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Murai T, Mori S, Hosono M, Takashima A, Machino S, Oohara T, Yamashita H, Makino S, Matsuda T, Wanibuchi H, Fukushima S. Strain differences in sensitivity to the promoting effect of sodium L-ascorbate in a two-stage rat urinary bladder carcinogenesis model. Jpn J Cancer Res 1997; 88:245-53. [PMID: 9140108 PMCID: PMC5921381 DOI: 10.1111/j.1349-7006.1997.tb00374.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Rat strain differences in sensitivity to the promoting effect of sodium L-ascorbate (SA) on the development of urinary bladder tumors were investigated. In experiment 1, WS/Shi (WS), ODS/Shiod/od (ODS), and LEW/Crj (LEW) rats were initiated with 0.05% N-butyl-N-(4-hydroxybutyl)-nitrosamine (BBN) in their drinking water and subsequently given basal Oriental MF diet (M) with or without a 5% SA supplement. In LEW rats the SA treatment increased the induction of neoplastic lesions in the urinary bladder, whereas WS and ODS animals proved unresponsive to its promoting effects. In experiment 2, WS and F344 rats were maintained on two kinds of commercial basal diets, M and CLEA CA-1 (C), during administration of SA, since dietary factors can influence promoting effects. Feeding M during the promotion period in F344 rats yielded significantly more neoplastic lesions than feeding C, but in WS rats no such dietary influence was apparent. In experiment 3, strain differences in biosynthesis of alpha-2u-globulin (alpha 1a-g) were assessed because both alpha 2a-g in the urine and administration of sodium salts of organic acids such as SA have been reported to be involved in tumor promotion. Immunohistochemical analysis of renal tubules and Western blotting analysis of urine revealed the presence of alpha 2a-g in all three strains examined. These data suggest that differences in susceptibility to promotion are due to genetic factors rather than dietary factors and the ability to synthesize alpha 2a-g.
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Affiliation(s)
- T Murai
- First Department of Pathology, Osaka City University Medical School
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Velazquez SF, Schoeny R, Rice GE, Cogliano VJ. Cancer risk assessment: historical perspectives, current issues, and future directions. Drug Chem Toxicol 1996; 19:161-85. [PMID: 8933022 DOI: 10.3109/01480549608998233] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- S F Velazquez
- Toxicology Excellence for Risk Assessment, Cincinnati, Ohio, USA
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Ogretmen B, Ratajczak H, Gendel SM, Stark BC. Effects of sodium saccharin and linoleic acid on mRNA levels of Her2/neu and p53 in a human breast epithelial cell line. Cancer Lett 1996; 102:91-9. [PMID: 8603385 DOI: 10.1016/0304-3835(96)04170-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The effects of two food-related chemicals (sodium saccharin and linoleic acid) on the levels of Her2/neu and p53 mRNA in a non-cancerous human breast epithelial cell line (HBL-100) were tested in comparison with the effects of the known tumor promoter phorbol 12-myristate 13-acetate (TPA). Treatments were made both with and without prior treatment with two well-known tumor initiators, N-nitroso-N-methylurea (NMU) or 7,12-dimethylbenz[a]anthracene (DMBA). The effects in general were small, the greatest being increases of 46-67% in Her2/neu mRNA levels in response to treatments with TPA or sodium saccharin following NMU treatments. These results demonstrate that sodium saccharin following NMU treatments might be involved in transcriptional regulation of Her2/neu in HBL-100 cells and suggest that its effects may not be limited to urinary bladder.
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Affiliation(s)
- B Ogretmen
- Department of Biological, Chemical, and Physical Sciences, Illinois Institute of Technology, Chicago, 60616, USA
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