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Aydın M, Aydın EB, Sezgintürk MK. Carboxyethylsilanetriol-Coated Magnetic Nanoparticles as an Ultrasensitive Immunoplatform for Electrochemical Magnetosensing of Cotinine. ACS Biomater Sci Eng 2024; 10:2567-2580. [PMID: 38529538 DOI: 10.1021/acsbiomaterials.3c01872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
In the present study, an innovative and simple electrochemical magneto biosensor based on carboxyethylsilanetriol-modified iron oxide (Fe3O4) magnetic nanoparticles was designed for ultrasensitive and specific analysis of cotinine, an important marker of smoking. Anticotinine antibodies were covalently immobilized on carboxylic acid-modified magnetic nanoparticles, and the cotinine-specific magnetic nanoparticles created a specific surface on the working electrode surface. The use of magnetic nanoparticles as an immobilization platform for antibodies provided a large surface area for antibody attachment and increased sensitivity. In addition, the advantages of the new immobilization platform were reusing the working electrode numerous times, recording repeatable and reproducible signals, and reducing the necessary volume of biomolecules. The specific interaction between cotinine and cotinine-specific antibody-attached magnetic nanoparticles restricted the electron transfer of the redox probe and changed the impedimetric response of the electrode correlated to the concentration of cotinine. The magneto biosensor had a wide detection range (2-300 pg/mL), a low LOD (606 fg/mL), and an acceptable recovery (97.24-105.31%) in real samples. In addition, the current biosensor's measurement results were in good agreement with those found by the standard liquid chromatography (HPLC) and enzyme-linked immunosorbent assay (ELISA) methods. These results showed that a simple impedimetric immunosensing platform was generated for the cotinine analysis.
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Affiliation(s)
- Muhammet Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ 59030, Turkey
| | - Elif Burcu Aydın
- Tekirdağ Namık Kemal University, Scientific and Technological Research Center, Tekirdağ 59030, Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale 17110, Turkey
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Saygın H, Korgalı E, Koç T, Doğan K. The effect of smoking and electronic cigarettes on rat testicles. Rev Int Androl 2023; 21:100365. [PMID: 37276739 DOI: 10.1016/j.androl.2023.100365] [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: 05/24/2021] [Revised: 01/17/2022] [Accepted: 04/12/2022] [Indexed: 06/07/2023]
Abstract
OBJECTIVE After the negative effects of smoking on public health were proven, smoking cessation campaigns were initiated by health ministries and non-governmental organizations. Many drugs have been tried to reduce the addiction to smoking and the nicotine contained in it. Recently, e-cigarettes (EC) are widely used for smoking cessation efforts, although the effects and possible harms are not fully known. In our study, we planned to show the effect of cigarette and EC smoke on the male urogenital system. METHODS Adult male wistar rats were exposed to cigarette and EC smoke in a specially designed glass bell jar. Urine cotinine levels, testicular weights, gonadosomatic index, sperm count and sperm motility, testicular histology, and biochemical findings were compared with the control group. RESULTS In some rats in the cigarette and EC group, the seminiferous tubules were disorganized, and the germ cells and Sertoli cells were separated and shed. Stopped germ cell separation, cavity formation, necrosis, fibrosis, and atrophy were observed in severe cases. Higher PCO levels were found in the cigarette group compared to controls. Tissue homogenates levels of LPO were higher in both EC and cigarette groups compared to controls. No significant differences were observed between groups in terms of sperm motility and sperm count. CONCLUSION Cigarette and EC liquid can increase oxidative stress as well as cause morphological changes in the testicle. To be a safe option in smoking cessation studies, its effect on people needs to be enlightened.
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Affiliation(s)
- Hüseyin Saygın
- Department of Urology, Faculty of Medicine, Cumhuriyet University, Sivas, Turkey.
| | - Esat Korgalı
- Department of Urology, Faculty of Medicine, Cumhuriyet University, Sivas, Turkey
| | - Tülay Koç
- Department of Pathology, Faculty of Medicine, Cumhuriyet University, Sivas, Turkey
| | - Kübra Doğan
- Department of Biochemistry, Sivas Numune Hospital, Sivas, Turkey
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Yin M, Lin H, Zhang L, Wei X, Sun Y, Luo Y, Yang H, Deng C, Xu D. Antibody-assisted MIL-53(Fe)/Pt-based electrochemical biosensor for the detection of the nicotine metabolite cotinine. Bioelectrochemistry 2023; 153:108470. [PMID: 37276807 DOI: 10.1016/j.bioelechem.2023.108470] [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: 03/20/2023] [Revised: 05/22/2023] [Accepted: 05/23/2023] [Indexed: 06/07/2023]
Abstract
Antibody-assisted MIL-53(Fe)/Pt was used as an electrochemical biosensor, and a rapid detection method for analysing cotinine content in smokers' saliva was developed based on this sensor. In this sensor, Pt-modified MIL-53(Fe) was modified as an electrode material onto the surface of the working electrode. The amino group was activated with glutaraldehyde and antibodies to cotinine were modified onto the surface and closed with 1% BSA. Cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) were used to study the electrode assembly and cotinine detection. The DPV results showed an ideal linear relationship between the current value and the logarithm of the concentration. The detection limit was 0.0092 ng/mL. It has good selectivity and cycling stability. The proposed Abs-MIL-53(Fe)/Pt can effectively and sensitively detect cotinine in saliva and has promisingapplications.
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Affiliation(s)
- Ming Yin
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Huaqing Lin
- Department of Chemistry, Fudan University, Shanghai 200433, PR China
| | - Li Zhang
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Xiuxia Wei
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Yiwei Sun
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Yuting Luo
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China
| | - Hui Yang
- Guizhou Academy of Tobacco Science, Guiyang 550081, PR China.
| | - Chunhui Deng
- Department of Chemistry, Fudan University, Shanghai 200433, PR China.
| | - Dongpo Xu
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China.
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Axente RE, Stan M, Chitescu CL, Nitescu VG, Vlasceanu AM, Baconi DL. Application of Ionic Liquids as Mobile Phase Additives for Simultaneous Analysis of Nicotine and Its Metabolite Cotinine in Human Plasma by HPLC-DAD. Molecules 2023; 28:molecules28041563. [PMID: 36838551 PMCID: PMC9960693 DOI: 10.3390/molecules28041563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/30/2023] [Accepted: 01/31/2023] [Indexed: 02/09/2023] Open
Abstract
Nicotine and cotinine are very polar basic molecules, which makes it difficult to analyze them by reversed-phase liquid chromatography (RPLC), especially in biological samples. Additives with an ionic character have been traditionally used in RPLC as silanol suppressors. The aim of our study was to investigate the potential of selected ionic liquids in improving chromatographic performance in comparison with common additives. The experimental design was conducted using the following ionic liquids as the mobile phase modifiers: 1-butyl-3-methylimidazolium tetrafluoroborate, BMIM[BF4] and 1-butyl-3-methylimidazolium hexafluorophosphate BMIM[PF6], with a C18 chromatographic column. The separation of these alkaloids on silica-based RPLC stationary phases was successfully conducted by the addition of BMIM[BF4] in an acetonitrile:phosphate-buffer-based mobile phase in a pH range of 2.3-5.2. The presented chromatographic method can be used as alternative for monitoring studies or pharmacokinetic application necessary for the evaluation of tobacco smoke exposure.
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Affiliation(s)
- Roxana E. Axente
- Faculty of Medicine and Pharmacy, Dunarea de Jos University of Galati, 800010 Galati, Romania
| | - Miriana Stan
- Department of Toxicology, Carol Davila University of Medicine and Pharmacy, 20021 Bucharest, Romania
- Correspondence:
| | - Carmen L. Chitescu
- Faculty of Medicine and Pharmacy, Dunarea de Jos University of Galati, 800010 Galati, Romania
| | - Viorela G. Nitescu
- Ward ATI—Toxicology, Pediatric Clinic 2, Emergency Clinical Hospital for Children Grigore Alexandrescu, 011743 Bucharest, Romania
| | - Ana-Maria Vlasceanu
- Department of Toxicology, Carol Davila University of Medicine and Pharmacy, 20021 Bucharest, Romania
| | - Daniela L. Baconi
- Department of Toxicology, Carol Davila University of Medicine and Pharmacy, 20021 Bucharest, Romania
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Chen HC, Chen YY, Chao MR, Chang YZ. Validation of a high-throughput method for simultaneous determination of areca nut and tobacco biomarkers in hair using microwave-assisted extraction and isotope dilution liquid chromatography tandem mass spectrometry. J Pharm Biomed Anal 2022; 216:114775. [PMID: 35490505 DOI: 10.1016/j.jpba.2022.114775] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 04/10/2022] [Accepted: 04/15/2022] [Indexed: 11/26/2022]
Abstract
For people with habits of chewing betel nuts and smoking, the probability of suffering from oral cancer is ten to a hundred times higher than others. Due to the serious health consequences of areca nut and tobacco, a reliable cessation program is needed. Hair is the best option to document long-term exposure. Unfortunately, the research on betel nut in hair did not attract much attention. In this study, a high-throughput method based on microwave-assisted extraction (MAE) and isotope dilution liquid chromatography tandem mass spectrometry (LC-MS/MS) was developed to measure the four biomarkers of betel nuts and cigarettes, including areca alkaloids (arecoline), tobacco alkaloids (nicotine), and their metabolites (arecaidine and cotinine). The hair sample was washed, cut, weighed, and incubated for 3 min MAE with methanol/trifluoroacetic acid, then evaporated and reconstituted for LC-MS/MS analysis. The total experiment time was 50 min. The lower limits of quantification (LOQ) were 5-10 pg/mg. The intra-day and inter-day precision were 2.2-7.6%. Intra-day and inter-day accuracy were - 6.1-8.2%. The method showed good linearity (r2 > 0.995) over LOQ - 1000 pg/mg concentration ranges. It was successfully applied to analyze 11 subjects of regular areca nut chewers, also smokers. Eight samples were black hair; three samples were naturally black hair with partially gray hair. Measured concentrations in black hair were in the range 56.9 pg/mg to 3.2 ng/mg for arecoline, 12.8 pg/mg to 222.2 pg/mg for arecaidine, 3.8 ng/mg to 33.4 ng/mg for nicotine and 1.1 ng/mg to 6.1 ng/mg for cotinine. The results showed lower levels in gray hair. This method was utilized successfully to analyze pg/mg levels of arecoline, arecaidine, nicotine, and cotinine, and good recoveries were obtained. The mean concentration of arecaidine and cotinine in hair was 15% and 20% of arecoline and nicotine, respectively. A good positive correlation was found between the concentrations of these compounds and self-report. This method improved extraction speed, concentration, and analysis of samples and is useful for monitoring betel nut and smoking cessation programs.
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Affiliation(s)
- Hsiu-Chuan Chen
- Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan
| | - Ya-Yi Chen
- Department of Stomatology, Tungs' Taichung MetroHarbor Hospital, Taichung, Taiwan
| | - Mu-Rong Chao
- Department of Occupational Safety and Health, Chung Shan Medical University, Taichung 40201, Taiwan
| | - Yan-Zin Chang
- Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan; Drug Testing Center, Department of Clinical Laboratory, Chung Shan Medical University Hospital, Taichung 40201, Taiwan.
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Direct Use of a Saliva-Collected Cotton Swab in Lateral Flow Immunoassay for the Detection of Cotinine. BIOSENSORS 2022; 12:bios12040214. [PMID: 35448274 PMCID: PMC9029424 DOI: 10.3390/bios12040214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 03/28/2022] [Accepted: 04/04/2022] [Indexed: 12/03/2022]
Abstract
The detection of salivary cotinine is useful for convenient smoking tests in spite of the high background effect of saliva. For precise results, the conventional salivary cotinine analysis for smoking detection requires complex pretreatment processes. Hence, in this study, we developed a modified paper-based lateral flow immunoassay (LFIA), termed “gap-LFIA”, for the direct application of saliva collected using cotton swabs for on-site detection. The gap-LFIA was constructed by modifying a conventional LFIA sensor, where the sample pad was divided to have a 3 mm gap. A saliva-collected cotton swab was inserted into the gap, and then, a buffer solution was added to the outer sample pad to dilute the saliva automatically. The gap-LFIA reduced the interference in salivary samples and showed improved signals, allowing for using the whole saliva directly without additional steps. Further, the deviation of results using a strip was less than that when the saliva was not diluted in a conventional cotinine kit, and it helped to distinguish between smokers and non-smokers more clearly in 15 min. This method of automatic dilution may apply to various clinical samples, including blood and serum, for direct application in future detections.
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Low-Dose Benzene Exposure Monitoring of Oil Refinery Workers: Inhalation and Biomarkers. ATMOSPHERE 2022. [DOI: 10.3390/atmos13030450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Airborne benzene in workplaces has progressively decreased due to preventive actions and the redesigning of facility processes. Professionals who assess occupational exposure should select techniques to detect benzene levels comparable to ambient air exposure. Thus, sensitive biomarkers are needed to discriminate the effects of confounding factors, such as smoking or sorbic acid (SA). In order to identify sensitive biomarkers and to study their correlation with confounding factors, 23 oil refinery workers were enrolled in the study; their airborne benzene exposures and biomarkers were monitored. Urinary benzene (U-B), t,t-muconic acid (t,t-MA), and S-phenylmercapturic acid (SPMA) were quantified. Urinary cotinine (U-C) and t,t-sorbic acid (t,t-SA) were evaluated to flag smoking and SA intake, respectively. The benzene measured in personal inhalation sampling ranged from 0.6 to 83.5 (median 1.7) µg/m3. The concentration range of the biomarkers, U-B, t,t-MA, and SPMA, were 18–4893 ng/m3, <10–79.4 µg/g creatinine, and <0.5–3.96 µg/g creatinine, respectively. Pearson tests were carried out; the best correlations were between airborne benzene and U-B (µg/L r = 0.820, p < 0.001) and between benzene and SPMA (g/L r = 0.812, p < 0.001), followed by benzene and t,t-MA (mg/L r = 0.465, p = 0.039). From our study, U-B and SPMA result to be the most reliable biomarkers to assess the internal number of low doses of benzene exposure, thanks to their specificity and sensitivity.
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Jin S, Pang W, Zhao L, Zhao Z, Mei S. Review of HPLC-MS methods for the analysis of nicotine and its active metabolite cotinine in various biological matrices. Biomed Chromatogr 2022; 36:e5351. [PMID: 35106788 DOI: 10.1002/bmc.5351] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 11/23/2021] [Accepted: 12/20/2021] [Indexed: 11/11/2022]
Abstract
In recent years, tobacco smoking is a risk factor for a series of diseases including cardiovascular diseases, cerebrovascular diseases, and cancers. Nicotine, the primary component of tobacco smoke, is mainly transformed to its active metabolite cotinine, which is often used as biomarker for tobacco exposure for its higher blood concentration and longer residence time than nicotine. Various analytical methods have been developed for the determination of nicotine and cotinine in biological matrices. This article reviewed the HPLC-MS based methods for nicotine and/or cotinine analysis in various biological matrices. The sample preparation, mass and chromatographic conditions and method validation results of these methods have been summarized and analyzed. Sample was mainly pretreated by protein precipitation and/or extraction. Separation was achieved using methanol and/or acetonitrile:water (with or without ammonium acetate) on C18 columns, and acetonitrile:water (with formic acid, ammonium acetate/formate) on HILIC columns. Nicotine-d3, nicotine-d4 and cotinine-d3 were commonly used internal standards. Other non-deuterated IS were also used such as ritonavir, N-ethylnorcotinine, and milrinone. For both nicotine and cotinine, the calibration range was 0.005-35000 ng/mL, the matrix effect was 75.96% - 126.8% and the recovery was 53% - 124.5%. The two analytes were stable at room temperature for 1-10 days, at -80 °C for up to 6 months, and after 3-6 freeze-thaw cycles. Comedications did not affect nicotine and cotinine analysis.
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Affiliation(s)
- Siyao Jin
- Clinical Research Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, P. R. China.,Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
| | - Wenyuan Pang
- Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China.,Department of Pharmacy, Beijing Tiantan Hospital, Capital Medical University, Beijing, P. R. China
| | - Libo Zhao
- Clinical Research Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, P. R. China.,Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
| | - Zhigang Zhao
- Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
| | - Shenghui Mei
- Department of Clinical Pharmacology, College of Pharmaceutical Sciences, Capital Medical University, Beijing, P. R. China
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Dos Reis Izolan L, Bandiera S, Pulcinelli RR, Nin MS, Almeida FB, Marques D, Fontella FU, de Almeida RF, Leal MB, Gomez R. Low-cost apparatus for cigarette smoke exposure in rats. J Neurosci Methods 2022; 366:109412. [PMID: 34798213 DOI: 10.1016/j.jneumeth.2021.109412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/28/2021] [Accepted: 11/09/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND The effects of tobacco smoke on the central nervous system are usually studied with isolated nicotine, ignoring other compounds present in cigarette smoke. The few studies that use in vivo whole-body cigarette smoke exposure are usually performed in expensive commercial apparatus. NEW METHOD We presented a feasible, safe, and low-cost apparatus for cigarette smoke exposure in rodents. RESULTS Rats exposed to cigarette smoke in this apparatus showed cotinine levels similar to human active smokers. Additional results showed that cigarette smoke exposure increased glutamate and aspartic acid levels and decreased leucine, isoleucine, ornithine, phenylalanine, and tryptophan levels in the cerebrospinal fluid of rats. COMPARISON WITH EXISTING METHOD(S) Our apparatus is feasible, safe, and costs 67-fold less than a commercial automatized smoking machine. Beyond the low cost, it does not require specialized knowledge for building or maintenance. CONCLUSIONS We concluded that our low-cost apparatus is reliable and reproduces cigarette smoke use in humans.
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Affiliation(s)
| | - Solange Bandiera
- Programa de Pós-graduação em Farmacologia e Terapêutica, UFRGS, Porto Alegre, Brazil
| | | | - Mauricio Schüler Nin
- Programa de Pós‑graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, Brazil; Departamento de Farmacologia, Universidade do Rio Grande (FURG), Rio Grande, Brazil
| | - Felipe Borges Almeida
- Programa de Pós‑graduação em Ciências da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre, Brazil
| | - Douglas Marques
- Programa de Pós-graduação em Neurociências, UFRGS, Porto Alegre, Brazil
| | - Fernada Urruth Fontella
- Programa de Pós-Graduação em Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Roberto Farina de Almeida
- Departamento de Ciências Biológicas, Programa de Pós-Graduação em Ciências Biológicas, Universidade Federal de Ouro Preto (UFOP), Ouro Preto, Brazil
| | - Mirna Bainy Leal
- Programa de Pós-graduação em Neurociências, UFRGS, Porto Alegre, Brazil; Programa de Pós-graduação em Farmacologia e Terapêutica, UFRGS, Porto Alegre, Brazil
| | - Rosane Gomez
- Programa de Pós-graduação em Neurociências, UFRGS, Porto Alegre, Brazil; Programa de Pós-graduação em Farmacologia e Terapêutica, UFRGS, Porto Alegre, Brazil.
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Fassa AG, Faria NMX, Szortyka ALSC, Meucci RD, Fiori NS, de Carvalho MP. Child Labor in Family Tobacco Farms in Southern Brazil: Occupational Exposure and Related Health Problems. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:12255. [PMID: 34832014 PMCID: PMC8620869 DOI: 10.3390/ijerph182212255] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/17/2021] [Accepted: 11/18/2021] [Indexed: 11/17/2022]
Abstract
Tobacco farming is considered Hazardous Child Labor in Brazil. This study examined the work of children and adolescents in tobacco farming, characterizing the level of urinary cotinine and the occurrence of Green Tobacco Sickness (GTS), pesticide poisoning, respiratory symptoms, and musculoskeletal disorders. A cross-sectional descriptive study was conducted with a random sample of tobacco growers under 18 years old in Southern Brazil. Ninety-nine young people were interviewed at 79 family farms. The majority began working in agriculture before they were 14 and worked harvesting and tying hands of tobacco; 60% were 16 or 17 years old, and 51.5% were male. During their lifetime, 24.5% reported GTS, and 3% reported pesticide poisoning. In the previous year, 29.3% reported low back pain, 6.1% wheezing, and 16.2% coughing without having a cold. Half of the 12 young people evaluated had over 100 ng/mL of urinary cotinine. The study indicates that child laborers do various activities and present a high prevalence of health problems. Health workers should be trained to identify child laborers and their impacts on health. Full-time farm schools could provide knowledge about sustainable agricultural production, reducing the rates of age-grade mismatch, without taking young people away from rural areas.
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Affiliation(s)
- Anaclaudia Gastal Fassa
- Department of Social Medicine, Faculty of Medicine, Federal University of Pelotas, Pelotas 96030-000, Brazil; (N.M.X.F.); (N.S.F.); (M.P.d.C.)
| | - Neice Muller Xavier Faria
- Department of Social Medicine, Faculty of Medicine, Federal University of Pelotas, Pelotas 96030-000, Brazil; (N.M.X.F.); (N.S.F.); (M.P.d.C.)
| | | | - Rodrigo Dalke Meucci
- Faculty of Medicine, Federal University of Rio Grande, Rio Grande 96203-900, Brazil;
| | - Nadia Spada Fiori
- Department of Social Medicine, Faculty of Medicine, Federal University of Pelotas, Pelotas 96030-000, Brazil; (N.M.X.F.); (N.S.F.); (M.P.d.C.)
| | - Maitê Peres de Carvalho
- Department of Social Medicine, Faculty of Medicine, Federal University of Pelotas, Pelotas 96030-000, Brazil; (N.M.X.F.); (N.S.F.); (M.P.d.C.)
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Xiong Y, Yu S. A Novel Growth Evaluation System for Tobacco Planting Based on Image Classification. JOURNAL OF ADVANCED COMPUTATIONAL INTELLIGENCE AND INTELLIGENT INFORMATICS 2019. [DOI: 10.20965/jaciii.2019.p1004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A novel growth evaluation system for tobacco planting (GESTP) based on a B/S architecture is introduced in this paper. It mainly consists of three parts: a mobile application (mobile app), a browser terminal and a server terminal. The GESTP system is used to evaluate the growth of tobacco and give farmers planting guidance instead them having to rely on personal judgment. Once the photos of the tobacco leaf and plant are uploaded to the web server via the mobile app or the browser terminal, the application program of the server terminal is called to process the tobacco images with image processing algorithms. The results including the grade of the tobacco growth and planting guidance will be provided to the client within a 2-second timeframe, which greatly help farmers understand the growth of tobacco and take planting measures. The running result indicates that the GESTP system provides an effective and straightforward way to evaluate the growth of tobacco and provides cultivation guidance to tobacco farmers.
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Akça EK, Atalay B, Öner B. Histopathologic and Immunohistochemical Investigation of the Effects of Vitamin C on Bone Healing in Rats Exposed to Nicotine. J Oral Maxillofac Surg 2019; 78:194.e1-194.e14. [PMID: 31605679 DOI: 10.1016/j.joms.2019.09.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 08/12/2019] [Accepted: 09/07/2019] [Indexed: 11/18/2022]
Abstract
PURPOSE The aim of the present study was to perform a histopathologic and immunohistochemical investigation of the effects of vitamin C on bone healing in rats exposed to nicotine. MATERIALS AND METHODS A total of 52 male Sprague-Dawley rats were assigned to 4 main groups: control, vitamin C, nicotine, and nicotine plus vitamin C. The rats in the nicotine groups were injected with nicotine at 12-hour intervals for 4 weeks. At the end of 4 weeks, a tibial defect was created in all the rats. Subcutaneous injections were administered at the same intervals postoperatively, and the vitamin C groups received intraperitoneal vitamin C injections every day for the first 3 days and then every other day postoperatively. The rats were sacrificed on postoperative days 7 and 21. The blood samples collected during sacrifice were tested to determine the blood cotinine levels, and histopathological and immunohistochemical analyses were performed on tibia samples. RESULTS The histopathologic evaluation revealed that nicotine significantly increased the amount of necrosis and significantly decreased new bone formation and the bone healing score. The presence of necrosis in the nicotine plus vitamin C group was significantly lower on day 21 (P = .005). A statistically significant difference was observed among the new bone formation of the control, nicotine, vitamin C, and nicotine plus vitamin C groups on day 21 (P = .001). The new bone healing score of the nicotine group was significantly lower than that of the control, vitamin C, and nicotine plus vitamin C groups (P = .003, P = .001, and P = .001). The immunohistochemical evaluation showed that nicotine increased the hypoxia-inducible factor-1α and vascular endothelial growth factor levels and decreased the bone morphogenetic protein-2 levels, especially in the groups sacrificed on day 21. CONCLUSIONS Vitamin C did not have a significant effect on bone healing. However, vitamin C administered with nicotine decreased the metabolism of nicotine and, thus, increased nicotine excretion.
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Affiliation(s)
- Eda Kaya Akça
- Resident, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
| | - Berkem Atalay
- Assistant Professor, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University, Istanbul, Turkey.
| | - Bilgin Öner
- Professor, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Istanbul University, Istanbul, Turkey
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Using Phytochemicals to Investigate the Activation of Nicotine Detoxification via Upregulation of CYP2A6 in Animal Models Exposed Tobacco Smoke Condensate by Intratracheal Instillation. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:7635197. [PMID: 30662513 PMCID: PMC6313994 DOI: 10.1155/2018/7635197] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 11/22/2018] [Indexed: 01/04/2023]
Abstract
This study examined the efficacy of standardized Smilax china L. root extract (SSCR) containing chlorogenic acid on detoxifying nicotine from tobacco smoke condensate (TSC) in vitro and in vivo. Chlorogenic acid is an identified bioactive component in SSCR by ultraperformance liquid chromatography/photodiode array/electrospray ionization/mass spectroscopy (UPLC/PDA/ESI/MS). HepG2 liver cells and A549 lung cells were carried for measuring ROS and antioxidant enzymes. Sprague-Dawley rats were treated with nicotine by intratracheal instillation (ITI). Cell viabilities by pretreatments of 5, 12.5, and 25, 50 μg SSCR/mL ranged from 41 to 76% in HepG2 and 65 to 95% in A549. Pretreatments of SSCR inhibited TSC-mediated production of reactive oxygen species (ROS) by 8 and 10% in HepG2 and A549 cells, respectively. However, the expression of CAT, SOD1, and AOX1 was downregulated by SSCR in the both cells. The highest conversion of cotinine was observed at 50 μg/mL of SSCR after 120 min of incubation. SSCR upregulated CYP2A6 3-fold in A549 cells regardless of TSC cotreatment. When Sprague-Dawley rats were treated with nicotine by ITI or subjected to SSCR administration for 14 days, the levels of cotinine in urine increased in SSCR treatment only. The cellular level of antioxidant capacity at 10 or 100 mg/kg body weight/day of SSCR treatment was 1.89 and 1.86 times higher than those of nicotine-control. Results suggest that the intake of SSCR can detoxify nicotine by elevating nicotine conversion to cotinine and antioxidant capacity.
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14
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Pinheiro GP, Souza-Machado CD, Fernandes AGO, Mota RCL, Lima LL, Vasconcellos DDS, Luz Júnior IPD, Silva YRDS, Lima VB, Oliva STD, Mello LMD, Couto RD, Chatkin JM, Cruz CMS, Cruz ÁA. Self-reported smoking status and urinary cotinine levels in patients with asthma. ACTA ACUST UNITED AC 2018; 44:477-485. [PMID: 30304204 PMCID: PMC6459745 DOI: 10.1590/s1806-37562017000000018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 03/26/2018] [Indexed: 11/21/2022]
Abstract
Objective: To determine the frequency of active smoking among patients with asthma and individuals without asthma by self-report and urinary cotinine measurement. Methods: This was a cross-sectional study conducted in the city of Salvador, Brazil, and involving 1,341 individuals: 498 patients with severe asthma, 417 patients with mild-to-moderate asthma, and 426 individuals without asthma. Smoking status was determined by self-report (with the use of standardized questionnaires) and urinary cotinine measurement. The study variables were compared with the chi-square test and the Kruskal-Wallis test. Results: Of the sample as a whole, 55 (4.1%) reported being current smokers. Of those, 5 had severe asthma, 17 had mild-to-moderate asthma, and 33 had no asthma diagnosis. Of the 55 smokers, 32 (58.2%) were daily smokers and 23 (41.8%) were occasional smokers. Urinary cotinine levels were found to be high in self-reported nonsmokers and former smokers, especially among severe asthma patients, a finding that suggests patient nondisclosure of smoking status. Among smokers, a longer smoking history was found in patients with severe asthma when compared with those with mild-to-moderate asthma. In addition, the proportion of former smokers was higher among patients with severe asthma than among those with mild-to-moderate asthma. Conclusions: Former smoking is associated with severe asthma. Current smoking is observed in patients with severe asthma, and patient nondisclosure of smoking status occurs in some cases. Patients with severe asthma should be thoroughly screened for smoking, and findings should be complemented by objective testing.
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Affiliation(s)
- Gabriela Pimentel Pinheiro
- . Programa para o Controle da Asma na Bahia - ProAR - Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil.,. Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
| | - Carolina de Souza-Machado
- . Programa para o Controle da Asma na Bahia - ProAR - Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil.,. Escola de Enfermagem, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
| | | | | | - Liranei Limoeiro Lima
- . Programa de Pós-Graduação em Ciências da Saúde, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
| | | | - Ives Pereira da Luz Júnior
- . Laboratório de Química Analítica e Ambiental, Instituto de Química, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
| | | | - Valmar Bião Lima
- . Programa para o Controle da Asma na Bahia - ProAR - Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil.,. Programa de Pós-Graduação em Medicina em Saúde, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
| | - Sérgio Telles de Oliva
- . Departamento de Química Analítica, Instituto de Química, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
| | - Luane Marques de Mello
- . Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto (SP) Brasil
| | - Ricardo David Couto
- . Laboratório de Bioquímica Clínica, Departamento de Análises Clínicas e Toxicológicas, Faculdade de Farmácia, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
| | - José Miguel Chatkin
- . Escola de Medicina, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre (RS) Brasil
| | - Constança Margarida Sampaio Cruz
- . Programa de Pós-Graduação em Medicina e Saúde Humana, Escola Bahiana de Medicina e Saúde Pública, Salvador (BA) Brasil.,. Obras Sociais Irmã Dulce, Hospital Santo Antônio, Salvador (BA) Brasil
| | - Álvaro Augusto Cruz
- . Programa para o Controle da Asma na Bahia - ProAR - Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil.,. Faculdade de Medicina da Bahia, Universidade Federal da Bahia - UFBA - Salvador (BA) Brasil
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15
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Zhu Y, Li Z, Pang Y, Huo W, Li N, Li Z, Zhang J, Ye R, Wang B. Association Between Chronic Exposure to Tobacco Smoke and Accumulation of Toxic Metals in Hair Among Pregnant Women. Biol Trace Elem Res 2018; 185:302-310. [PMID: 29497997 DOI: 10.1007/s12011-018-1274-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 02/13/2018] [Indexed: 02/02/2023]
Abstract
Tobacco smoke contains various toxic heavy metals that individuals are exposed to when they smoke. Despite the presence of heavy metals in tobacco smoke, the relationship between smoking and the accumulation of toxic metals in pregnant women after long-term exposure remains under discussion. We examined the association between long-term exposure to tobacco smoke and the accumulation of toxic metals in the hair of female participants. Our study recruited 252 women from the Shanxi and Hebei provinces of Northern China; these participants were self-reported non-active smokers, and had previously delivered healthy babies without birth defects. Scalp hair was collected and analyzed for nicotine and cotinine and five potentially toxic metals (specifically, silver, chromium, cadmium, mercury, and lead). Our results showed significant positive correlations between cotinine and four metals, including silver (r = 0.369, p < 0.001), cadmium (r = 0.185, p < 0.01), mercury (r = 0.161, p < 0.05), and lead (r = 0.243, p < 0.001). Significant positive correlations were also found between nicotine and three metals-specifically silver (r = 0.331, p < 0.001), cadmium (r = 0.176, p < 0.01), and lead (r = 0.316, p < 0.001). A logistic regression model showed significant associations between cotinine and potentially toxic metals including mercury, silver, and lead (with or without adjusting for potential confounders). We thus conclude that long-term passive smoking could potentially increase the exposure level of toxic metals including lead, silver, and mercury in our study, which are especially harmful for pregnant women and their unborn fetus.
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Affiliation(s)
- Yibing Zhu
- Institute of Reproductive and Child Health, Peking University, Beijing, 100191, People's Republic of China
- Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing, 100191, People's Republic of China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, People's Republic of China
| | - Zhiwen Li
- Institute of Reproductive and Child Health, Peking University, Beijing, 100191, People's Republic of China
- Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing, 100191, People's Republic of China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, People's Republic of China
| | - Yiming Pang
- Institute of Reproductive and Child Health, Peking University, Beijing, 100191, People's Republic of China
- Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing, 100191, People's Republic of China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, People's Republic of China
| | - Wenhua Huo
- Institute of Reproductive and Child Health, Peking University, Beijing, 100191, People's Republic of China
- Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing, 100191, People's Republic of China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, People's Republic of China
| | - Nan Li
- Institute of Reproductive and Child Health, Peking University, Beijing, 100191, People's Republic of China
- Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing, 100191, People's Republic of China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, People's Republic of China
| | - Zhenjiang Li
- Institute of Reproductive and Child Health, Peking University, Beijing, 100191, People's Republic of China
- Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing, 100191, People's Republic of China
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, People's Republic of China
| | - Jingxu Zhang
- Department of Child, Adolescent and Women's Health, School of Public Health, Peking University, Beijing, 100191, People's Republic of China
| | - Rongwei Ye
- Institute of Reproductive and Child Health, Peking University, Beijing, 100191, People's Republic of China.
- Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing, 100191, People's Republic of China.
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, People's Republic of China.
| | - Bin Wang
- Institute of Reproductive and Child Health, Peking University, Beijing, 100191, People's Republic of China.
- Key Laboratory of Reproductive Health, National Health and Family Planning Commission of the People's Republic of China, Beijing, 100191, People's Republic of China.
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, People's Republic of China.
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16
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Kahl VFS, da Silva FR, Alves JDS, da Silva GF, Picinini J, Dhillon VS, Fenech M, de Souza MR, Dias JF, de Souza CT, Salvador M, Branco CDS, Thiesen FV, Simon D, da Silva J. Role of PON1, SOD2, OGG1, XRCC1, and XRCC4 polymorphisms on modulation of DNA damage in workers occupationally exposed to pesticides. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 159:164-171. [PMID: 29747151 DOI: 10.1016/j.ecoenv.2018.04.052] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 04/21/2018] [Accepted: 04/26/2018] [Indexed: 06/08/2023]
Abstract
Tobacco farming has been proving to induce poor health outcomes in agricultural workers, genomic instability being the triggering one. This study evaluated influence of PON1 (paraoxonase 1), SOD2 (superoxide dismutase), OGG1 (8-oxoguanine glycosylase), XRCC1 (X-ray repair cross-complementing protein 1), and XRCC4 (X-ray repair cross-complementing protein 4) genes polymorphisms on DNA damage in 121 subjects occupationally exposed to pesticides mixtures and nicotine at tobacco fields and 121 non-exposed individuals. Inorganic elements (Cl, P, S and Zn) and cotinine levels were found increased in farmers, confirming exposure. Results show higher frequencies of buccal micronucleus (MN), nuclear buds (NBUD), binucleated cells (BN) and damage index (comet assay), reduced telomere length (TL), and increased parameters of oxidative stress in farmers compared to non-exposed individuals. PON1 Gln/Gln genotype was associated with increased MN frequency. SOD2 Val/Val showed association with increased frequency of MN and NBUD and decreased antioxidant activity. The XRCC1 Arg/Arg showed protective effect for MN, BN and TL, which was also positively influenced by OGG1 -/Cys. MN was decreased in XRCC4 -/Ile farmers. These genotypes also showed a risk for antioxidant activity. Our study proposes that PON1 and SOD2 variants play a role in xenobiotic-metabolizing system in farmers, while base excision repair (BER) pathway could be the repair mechanism involved in genomic instability suffered by tobacco farmers.
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Affiliation(s)
- Vivian F Silva Kahl
- Laboratory of Toxicological Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | | | - Jodel da Silva Alves
- Laboratory of Toxicological Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Gabrieli Flesch da Silva
- Laboratory of Toxicological Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Juliana Picinini
- Laboratory of Toxicological Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Varinderpal Singh Dhillon
- Health and Biosecurity Flagship, Commonwealth Scientific and Industrial Research Organization (CSIRO), Adelaide, SA, Australia
| | - Michael Fenech
- Health and Biosecurity Flagship, Commonwealth Scientific and Industrial Research Organization (CSIRO), Adelaide, SA, Australia
| | - Melissa Rosa de Souza
- Laboratory of Toxicological Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Johnny F Dias
- Ion Implantation Laboratory, Physics Institute, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Claudia Telles de Souza
- Ion Implantation Laboratory, Physics Institute, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Mirian Salvador
- Biotechnology Institute, University of Caxias do Sul, Caxias do Sul, RS, Brazil
| | | | - Flávia Valadão Thiesen
- Toxicology Institute, Catholic Pontifice University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Daniel Simon
- Laboratory of Human Molecular Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
| | - Juliana da Silva
- Laboratory of Toxicological Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Canoas, RS, Brazil
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17
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Abstract
Biomarkers of Smoking - Which Cut-Off Values Should be Used? Abstract. Verification of smoking status by means of biomarkers is important for treatment decisions of patients with smoking-related diseases. Cotinine is currently the best biomarker to document nicotine consumption. A low cost alternative method to determine smoking status is by measurement of carboxyhemoglobin (CO-Hb) in the exhaled breath. The main disadvantage of CO-Hb is the short half-life. The appropriate cut-off value for active nicotine consumption in Switzerland is 50 ng/ml or higher cotinine in the urine or 10 ng/ml and 12 ng/ml in serum and saliva, respectively. CO-Hb levels greater than 2 % indicate smoking with high probability, levels above 3 % with very high probability.
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18
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Kahl VFS, Dhillon VS, Simon D, da Silva FR, Salvador M, Branco CDS, Cappetta M, Martínez-López W, Thiesen FV, Dias JF, Souza CTD, Fenech M, da Silva J. Chronic occupational exposure endured by tobacco farmers from Brazil and association with DNA damage. Mutagenesis 2018; 33:119-128. [PMID: 29669110 DOI: 10.1093/mutage/gex045] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 10/24/2017] [Indexed: 12/17/2023] Open
Abstract
Tobacco farming is an important economic income in Brazil, although it has been challenged as regard the occupational exposure to both pesticides and nicotine endured by farmers. Chronic occupational exposure to complex mixtures can lead to health hazardous. We examined genomic instability and epigenetic changes in tobacco farmers occupationally exposed to pesticide mixtures and nicotine at tobacco fields. DNA damage was assessed by alkaline comet assay in blood cells. Genomic DNA was isolated, and telomere length was measured using quantitative polymerase chain reaction assay. We measured 5-methyl-2'-deoxycytidine, a marker of global DNA methylation, and p16 promoter methylation. The oxidative profile was evaluated by trolox equivalent antioxidant capacity and lipid peroxidation (thiobarbituric acid reactive substances) in serum. Exposure parameters, plasma cotinine and inorganic element levels, were also measured. DNA damage was significantly elevated for farmers in relation to unexposed group (P < 0.001; Mann-Whitney test) and positively associated with years of exposure. Inverse relationship between DNA damage and total equivalent antioxidant activity was demonstrated for exposed and unexposed groups. Exposed group showed significantly shorter telomeres (P < 0.001; unpaired t-test) and DNA hypomethylation (P < 0.001; unpaired t-test), as well as p16 hypermethylation (P = 0.003; Mann-Whitney test). Lipid peroxidation was increased for exposed group in relation to unexposed one (P = 0.02; Mann-Whitney test) and presented a positive correlation with global DNA methylation (P = 0.0264). Farmers have increased plasma cotinine levels (P < 0.001) and inorganic elements (phosphorus, sulphur and chlorine) in relation to unexposed group. Elevated oxidative stress levels due to chronic occupational pesticide mixtures and nicotine exposure in tobacco farmers were associated with higher DNA damage, shorter telomeres and altered DNA methylation. Telomere-accelerated attrition due to exposure may be potential intermediate step before a disease state.
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Affiliation(s)
- Vívian F Silva Kahl
- Laboratory of Toxicological Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Av. Farroupilha, São José, Canoas, Rio Grande do Sul, Brazil
| | - Varinderpal Singh Dhillon
- Health and Biosecurity Flagship, Commonwealth Scientific and Industrial Research Organization (CSIRO), Adelaide, South Australia, Australia
| | - Daniel Simon
- Laboratory of Human Molecular Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Av. Farroupilha, São José, Canoas, Rio Grande do Sul, Brazil
| | - Fernanda Rabaioli da Silva
- Postgraduate Program in Environmental Impact Assessment, UniLaSalle, Av. Victor Barreto, Canoas, Rio Grande do Sul, Brazil
| | - Mirian Salvador
- Biotechnology Institute, University of Caxias do Sul, Rua Travessão Solferino, Cruzeiro, Caxias do Sul, Rio Grande do Sul, Brazil
| | - Cátia Dos Santos Branco
- Biotechnology Institute, University of Caxias do Sul, Rua Travessão Solferino, Cruzeiro, Caxias do Sul, Rio Grande do Sul, Brazil
| | - Mónica Cappetta
- Laboratory of Genetic Epidemiology, Genetics Department, Medicine School, Universidad de la República, Av. General Flores, Montevideo, Uruguay
| | - Wilner Martínez-López
- Department of Genetic Toxicology and Chromosome Patology, Instituto de Investigaciones Biológicas Clemente Estable, Av. Italia, Montevideo, Uruguay
| | - Flávia V Thiesen
- Toxicology Institute, Catholic Pontifice University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Johnny F Dias
- Ion Implantation Laboratory, Physics Institute, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, Agronomia, Porto Alegre, Rio Grande do Sul, Brazil
| | - Claudia Telles de Souza
- Ion Implantation Laboratory, Physics Institute, Federal University of Rio Grande do Sul, Av. Bento Gonçalves, Agronomia, Porto Alegre, Rio Grande do Sul, Brazil
| | - Michael Fenech
- Health and Biosecurity Flagship, Commonwealth Scientific and Industrial Research Organization (CSIRO), Adelaide, South Australia, Australia
| | - Juliana da Silva
- Laboratory of Toxicological Genetics, Post-Graduate Program in Cellular and Molecular Biology Applied to Health (PPGBioSaúde), Lutheran University of Brazil (ULBRA), Av. Farroupilha, São José, Canoas, Rio Grande do Sul, Brazil
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19
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Nguyen M, Nishi N, Kadota A, Okuda N, Arima H, Fujiyoshi A, Nakano Y, Ohkubo T, Ueshima H, Okayama A, Miura K. Passive Smoking at Home by Socioeconomic Factors in a Japanese Population: NIPPON DATA2010. J Epidemiol 2018; 28 Suppl 3:S40-S45. [PMID: 29503385 PMCID: PMC5825692 DOI: 10.2188/jea.je20170243] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Accepted: 10/02/2017] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Long-term passive exposure to cigarette smoke has been reported to affect the health of non-smokers. This study aims to investigate the relationships among socioeconomic factors and passive smoking at home in the non-current smokers of a representative sample from a general Japanese population. METHODS Data are from NIPPON DATA2010. Among 2,891 participants, 2,288 non-current smokers (1,763 never smokers and 525 past smokers) were analyzed in the present study. Cross-sectional analyses were performed on the relationships among socioeconomic factors and passive smoking at home (several times a week or more) in men and women separately. Socioeconomic factors were employment, length of education, marital status, and equivalent household expenditure. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated using a multivariable logistic regression model. RESULTS The multivariable-adjusted model showed that employed women had a higher risk of passive smoking than unemployed women (OR 1.44; 95% CI, 1.06-1.96). Women with 9 years or less of education had a higher risk of passive smoking at home than women with 13 years and more of education (OR 2.37; 95% CI, 1.49-3.78). Single women had a lower risk of passive smoking at home (OR 0.53; 95% CI, 0.37-0.77) than married women. No significant associations were observed in men. CONCLUSIONS An employed status, lower education, and being single were associated with passive smoking at home in the non-current smoking women of a representative Japanese population.
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Affiliation(s)
- Minh Nguyen
- Center for Epidemiologic Research in Asia, Shiga University of Medical Science, Shiga, Japan
- Division of Respiratory Medicine, Department of Internal Medicine, Shiga University of Medical Science, Shiga, Japan
| | - Nobuo Nishi
- International Center for Nutrition and Information, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, Tokyo, Japan
| | - Aya Kadota
- Center for Epidemiologic Research in Asia, Shiga University of Medical Science, Shiga, Japan
- Department of Public Health, Shiga University of Medical Science, Shiga, Japan
| | - Nagako Okuda
- Department of Health and Nutrition, University of Human Arts and Sciences, Saitama, Japan
| | - Hisatomi Arima
- Department of Preventive Medicine and Public Health, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Akira Fujiyoshi
- Department of Public Health, Shiga University of Medical Science, Shiga, Japan
| | - Yasutaka Nakano
- Division of Respiratory Medicine, Department of Internal Medicine, Shiga University of Medical Science, Shiga, Japan
| | - Takayoshi Ohkubo
- Department of Hygiene and Public Health, Teikyo University School of Medicine, Tokyo, Japan
| | - Hirotsugu Ueshima
- Center for Epidemiologic Research in Asia, Shiga University of Medical Science, Shiga, Japan
- Department of Public Health, Shiga University of Medical Science, Shiga, Japan
| | - Akira Okayama
- Research Institute of Strategy for Prevention, Tokyo, Japan
| | - Katsuyuki Miura
- Center for Epidemiologic Research in Asia, Shiga University of Medical Science, Shiga, Japan
- Department of Public Health, Shiga University of Medical Science, Shiga, Japan
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20
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Nanovskaya TN, Oncken C, Fokina VM, Feinn RS, Clark SM, West H, Jain SK, Ahmed MS, Hankins GDV. Bupropion sustained release for pregnant smokers: a randomized, placebo-controlled trial. Am J Obstet Gynecol 2017; 216:420.e1-420.e9. [PMID: 27890648 PMCID: PMC5376363 DOI: 10.1016/j.ajog.2016.11.1036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 11/02/2016] [Accepted: 11/16/2016] [Indexed: 10/20/2022]
Abstract
BACKGROUND Bupropion is used to treat depression during pregnancy. However, its usefulness as a smoking cessation aid for pregnant women is not fully known. OBJECTIVE The objective of the study was to evaluate the preliminary efficacy of bupropion sustained release for smoking cessation during pregnancy. STUDY DESIGN We conducted a randomized, prospective, double-blind, placebo-controlled, pilot trial. Pregnant women who smoked daily received individualized behavior counseling and were randomly assigned to a 12 week, twice-a-day treatment with 150 mg bupropion sustained release or placebo. The primary study objectives were to determine whether bupropion sustained release reduces nicotine withdrawal symptoms on the quit date and during the treatment period compared with placebo and whether it increases 7 day point prevalence abstinence at the end of the treatment period and at the end of pregnancy. RESULTS Subjects in the bupropion (n = 30) and placebo (n = 35) groups were comparable in age, smoking history, number of daily smoked cigarettes, and nicotine dependence. After controlling for maternal age and race, bupropion sustained release reduced cigarette cravings (1.5 ± 1.1 vs 2.1 ± 1.2, P = .02) and total nicotine withdrawal symptoms (3.8 ± 4.3 vs 5.4 ± 5.1, P = .028) during the treatment period. Administration of bupropion sustained release reduced tobacco exposure, as determined by levels of carbon monoxide in exhaled air (7.4 ± 6.4 vs 9.1 ± 5.8, P = .053) and concentrations of cotinine in urine (348 ± 384 ng/mL vs 831 ± 727 ng/mL, P = .007) and increased overall abstinence rates during treatment (19% vs 2%, P = .003). However, there was no significant difference in 7 day point prevalence abstinence rates between the 2 groups at the end of medication treatment (17% vs 3%, P = .087) and at the end of pregnancy (10% vs 3%, P = .328). CONCLUSION Individual smoking cessation counseling along with the twice-daily use of 150 mg bupropion sustained release increased smoking cessation rates and reduced cravings and total nicotine withdrawal symptoms during the treatment period. However, there was no significant difference in abstinence rates between groups at the end of medication treatment and at the end of pregnancy, likely because of the small sample size. A larger study is needed to confirm these findings and to examine the potential benefit/ risk ratio of bupropion sustained release for smoking cessation during pregnancy.
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Affiliation(s)
- Tatiana N Nanovskaya
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, TX
| | - Cheryl Oncken
- University of Connecticut School of Medicine, Farmington, CT
| | - Valentina M Fokina
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, TX
| | - Richard S Feinn
- Quinnipiac University, Frank H Netter, MD, School of Medicine, North Haven, CT
| | - Shannon M Clark
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, TX
| | - Holly West
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, TX
| | - Sunil K Jain
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, TX
- Department of Pediatrics, The University of Texas Medical Branch at Galveston, TX
| | - Mahmoud S Ahmed
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, TX
| | - Gary D V Hankins
- Department of Obstetrics & Gynecology, The University of Texas Medical Branch at Galveston, TX
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Gomez R, Schneider R, Quinteros D, Santos CF, Bandiera S, Thiesen FV, Coitinho AS, Fernandes MDC, Wieczorek MG. Effect of Alcohol and Tobacco Smoke on Long-Term Memory and Cell Proliferation in the Hippocampus of Rats. Nicotine Tob Res 2015; 17:1442-8. [PMID: 25744965 DOI: 10.1093/ntr/ntv051] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Accepted: 02/19/2015] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Alcohol is frequently used in combination with tobacco and few studies explore interactions between these two drugs of abuse. Here, we evaluated the effect of chronic alcohol administration and concomitant exposure to tobacco smoke on long-term memory and on cell proliferation in the hippocampus of rats. METHODS Forty male Wistar rats were assigned to four groups and treated with alcohol (2g/kg by gavage) and/or exposed to tobacco smoke (from six cigarettes, by inhalation) twice a day (at 9:00 AM and 2:00 PM) for 30 days. Long-term memory was evaluated in the inhibitory avoidance test and hippocampal cell proliferation was analyzed for bromodeoxyuridine immunohistochemistry. RESULTS Our results showed that alcohol, tobacco smoke, or their combination improved the long-term memory evaluated by the memory index in rats. Moreover, alcohol and tobacco coadministration decreased bromodeoxyuridine-labeled cells by 60% when compared to the control group, while alcohol treatment decreased labeled cells by 40%. The tobacco group showed a nonsignificant 26% decrease in labeled cells compared to the control group. CONCLUSIONS Chronic alcohol and tobacco coadministration improves the long-term memory in rats in the inhibitory avoidance test. However, coadministration decreases the cell proliferation in the hippocampus of rats, suggesting a deleterious effect by the combined use of these drugs of abuse.
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Affiliation(s)
- Rosane Gomez
- Laboratório de Álcool e Tabaco, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil; Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil; Programa de Pós-Graduação em Ciências Biológicas: Neurociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil;
| | - Ricardo Schneider
- Laboratório de Álcool e Tabaco, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil; Programa de Pós-Graduação em Ciências Biológicas: Neurociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Dayane Quinteros
- Laboratório de Álcool e Tabaco, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Carolina Ferreira Santos
- Laboratório de Álcool e Tabaco, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Solange Bandiera
- Laboratório de Álcool e Tabaco, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil; Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Flavia Valadão Thiesen
- Departamento de Toxicologia, Pontifícia Universidade Católica do Rio Grande do Sul, Porto Alegre, Brasil
| | - Adriana Simon Coitinho
- Departamento de Microbiologia e Imunologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
| | - Marilda da Cruz Fernandes
- Laboratório de Patologia, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brasil
| | - Marina Godinho Wieczorek
- Laboratório de Álcool e Tabaco, Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil; Programa de Pós-Graduação em Ciências Biológicas: Fisiologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brasil
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Park JH, Lee CK, Kim SY, Suh C, Kim KH, Kim JH, Son BC, Lee JT, Yu SD, Choi W, Im H. Decline in non-smoking workers' urine cotinine levels after increased smoking regulation in Korea. Ann Occup Environ Med 2015; 27:17. [PMID: 26120472 PMCID: PMC4483214 DOI: 10.1186/s40557-015-0066-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 05/26/2015] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVES To identify any association between implementing smoking regulation policies and workers' urine cotinine concentration levels in Korea. METHODS From the first stage of the Korean National Environmental Health Survey conducted by the National Institute of Environmental Research from 2009 to 2011, 2,475 non-smoking workers selected. We analyzed the trend in the changes of cotinine concentration in urine using the general linear model and linear regression, in various jobs as categorized by the National Center for Health Statistics (NCHS) and Korea Standard Classification of Occupations (KSCO). RESULTS The urine cotinine concentration tended to decrease every year (2.91 ng/ml in 2009, 2.12 ng/ml in 2010, and 1.31 ng/ml in 2011), showing a decreasing trend (P < 0.001). The total subjects' decreased cotinine concentration in urine between 2009 and 2011 was 2.72 ng/ml (54.1 % relative decrease). The changes in each subgroup's urine cotinine concentration ranged from 1.59 to 6.03 ng/ml (33.2 to 77.5 %). All groups except for the managerial group (n = 49), which had a small sample size, had statistically significant negative regression coefficients (p < 0.05). The ranges of the decrease in urine cotinine were 2.75 ng/ml (53.6 %) for males and 2.72 ng/ml (54.9 %) for females. The negative slope in urine cotinine level was statistically significantly greater in men than women. The changes in urine cotinine by occupation as classified by the NCHS occupational categories ranged from 2.43 to 3.36 ng/ml (46.6 to 61.5 % relative decrease). The negative slopes in urine cotinine levels of the white-collar and farm workers were statistically significantly greater than those of the service workers and blue-collar workers. The change by occupation as classified by the KSCO ranged from 1.59 to 6.03 ng/ml (a 33.2 to 77.5 % relative decrease). The negative slopes in urine cotinine levels of the professionals and related workers and clerks were statistically significantly greater than those of the service workers and plant and machine operators and assemblers. CONCLUSIONS The cotinine concentration in urine among non-smoking worker groups tended to decline from 2009 to 2011. Such a result may be an indirect indicator of the effectiveness of smoking regulation policies including the revision of the National Health Promotion Act.
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Affiliation(s)
- Ju-Hyoung Park
- />Department of Occupational and Environmental Medicine & Institute of Environmental and Occupational Medicine, Pusan Paik Hospital, Inje University, 75, Bokji-ro, Busanjin-gu, Busan 633-165 Republic of Korea
| | - Chae-Kwan Lee
- />Department of Occupational and Environmental Medicine & Institute of Environmental and Occupational Medicine, Pusan Paik Hospital, Inje University, 75, Bokji-ro, Busanjin-gu, Busan 633-165 Republic of Korea
| | - Se-Yeong Kim
- />Department of Occupational and Environmental Medicine & Institute of Environmental and Occupational Medicine, Pusan Paik Hospital, Inje University, 75, Bokji-ro, Busanjin-gu, Busan 633-165 Republic of Korea
| | - Chunhui Suh
- />Department of Occupational and Environmental Medicine & Institute of Environmental and Occupational Medicine, Pusan Paik Hospital, Inje University, 75, Bokji-ro, Busanjin-gu, Busan 633-165 Republic of Korea
| | - Kun-Hyung Kim
- />Department of Occupational and Environmental Medicine & Institute of Environmental and Occupational Medicine, Pusan Paik Hospital, Inje University, 75, Bokji-ro, Busanjin-gu, Busan 633-165 Republic of Korea
| | - Jeong-Ho Kim
- />Department of Occupational and Environmental Medicine & Institute of Environmental and Occupational Medicine, Pusan Paik Hospital, Inje University, 75, Bokji-ro, Busanjin-gu, Busan 633-165 Republic of Korea
| | - Byung-Chul Son
- />Department of Occupational and Environmental Medicine & Institute of Environmental and Occupational Medicine, Pusan Paik Hospital, Inje University, 75, Bokji-ro, Busanjin-gu, Busan 633-165 Republic of Korea
| | - Jong-Tae Lee
- />Department of Occupational and Environmental Medicine & Institute of Environmental and Occupational Medicine, Pusan Paik Hospital, Inje University, 75, Bokji-ro, Busanjin-gu, Busan 633-165 Republic of Korea
| | - Seung-Do Yu
- />Environmental Health Research Department, National Institute of Environmental Research, Incheon, Republic of Korea, Hwangyong-ro 42, Seogu, Incheon 404-708 Republic of Korea
| | - Wookhee Choi
- />Environmental Health Research Department, National Institute of Environmental Research, Incheon, Republic of Korea, Hwangyong-ro 42, Seogu, Incheon 404-708 Republic of Korea
| | - Hosub Im
- />Center for life & environmental science, Seegene medical foundation, Seoul, Republic of Korea, 320, Cheonho-daero, Seongdong-gu, Seoul 133-847 Republic of Korea
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Antunes MV, da Silva CFR, Finger MA, Moore C, Linden R. Correlation Analysis Between Cotinine Hair Concentrations From Active Smokers and Nicotine Intake and Dependence. Ther Drug Monit 2015; 37:405-7. [DOI: 10.1097/ftd.0000000000000140] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Machado JDB, Chatkin JM, Zimmer AR, Goulart APS, Thiesen FV. Cotinine and polycyclic aromatic hydrocarbons levels in the amniotic fluid and fetal cord at birth and in the urine from pregnant smokers. PLoS One 2014; 9:e116293. [PMID: 25549364 PMCID: PMC4280223 DOI: 10.1371/journal.pone.0116293] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 12/08/2014] [Indexed: 01/29/2023] Open
Abstract
Cigarette smoking during pregnancy has several impacts on fetal development, including teratogenic effects. The objective of this study was to assess whether the toxic substances (cotinine and polycyclic aromatic hydrocarbons) found in pregnant smokers are transmitted to their fetuses. The outcomes were analyzed measuring cotinine and 1-hydroxypyrene in the amniotic fluid and maternal urine, benzopyrene and cotinine in the umbilical cord blood. Through a controlled cross-sectional design, 125 pregnant women were selected and classified according to their smoking status: 37 current smokers, 25 passive smokers and 63 non-smokers (controls). We performed high-performance liquid chromatography to measure substances’ concentrations. A post-hoc Tukey’s test was used to analyze the differences between the groups. All variables were significantly different between controls and smokers. The mean ratios between the concentration of cotinine in smokers compared to controls were as follows: 5.9 [2.5–13.5], p<0.001 in the urine; 25 [11.9–52.9], p<0.001 in the amniotic fluid; and 2.6 [1.0–6.8], p = 0.044 in the umbilical cord blood. The mean ratios of 1-hydroxypyrene concentration between smokers and controls were 7.3 [1.6–29.6], p = 0.003 in the urine and 1.3 [1.0–1.7], p = 0.012 in the amniotic fluid, and of benzopyrene in umbilical cord blood was 2.9 [1.7–4.7], p<0.001. There were no significant differences between controls and passive smokers. When comparing the three groups together, there were statistical differences between all variables. Thus, the fetuses of pregnant smokers are exposed to toxic and carcinogens substances. To our knowledge, this is the first study to measure 1-hydroxypyrene in the amniotic fluid and benzopyrene in umbilical cord blood by high-performance liquid chromatography when considering pregnant women in relation to smoking exposure only.
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Affiliation(s)
- Julia de Barros Machado
- School of Medicine, Pontifícia Universidade Católica, Rio Grande do Sul, Porto Alegre, Brazil
| | - José Miguel Chatkin
- School of Medicine, Pontifícia Universidade Católica, Rio Grande do Sul, Porto Alegre, Brazil
| | - Aline Rigon Zimmer
- School of Pharmacy, Pontifícia Universidade Católica, Rio Grande do Sul, Porto Alegre, Brazil
| | | | - Flávia Valladão Thiesen
- School of Pharmacy, Pontifícia Universidade Católica, Rio Grande do Sul, Porto Alegre, Brazil
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Bartolomé M, Gallego-Picó A, Huetos O, Castaño A. High-performance liquid chromatography with diode-array detection cotinine method adapted for the assessment of tobacco smoke exposure. J Sep Sci 2014; 37:1404-10. [DOI: 10.1002/jssc.201301259] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 03/12/2014] [Accepted: 03/14/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Mónica Bartolomé
- Environmental Toxicology; National Centre for Environmental Health; Instituto de Salud Carlos III; Majadahonda Spain
| | - Alejandrina Gallego-Picó
- Department of Analytical Sciences; Faculty of Sciences; National University of Distance Education (UNED); Madrid Spain
| | - Olga Huetos
- Environmental Toxicology; National Centre for Environmental Health; Instituto de Salud Carlos III; Majadahonda Spain
| | - Argelia Castaño
- Environmental Toxicology; National Centre for Environmental Health; Instituto de Salud Carlos III; Majadahonda Spain
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Stragierowicz J, Mikołajewska K, Zawadzka-Stolarz M, Polańska K, Ligocka D. Estimation of cutoff values of cotinine in urine and saliva for pregnant women in Poland. BIOMED RESEARCH INTERNATIONAL 2013; 2013:386784. [PMID: 24228246 PMCID: PMC3818804 DOI: 10.1155/2013/386784] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 09/16/2013] [Indexed: 11/18/2022]
Abstract
Setting appropriate cutoff values and the use of a highly sensitive analytical method allow for correct classification of the smoking status. Urine-saliva pairs samples of pregnant women in the second and third trimester, and saliva only in the first trimester were collected. Offline SPE and LC-ESI-MS/MS method was developed in the broad concentration range (saliva 0.4-1000 ng/mL, urine 0.8-4000 ng/mL). The mean recoveries were 3.7 ± 7.6% for urine and 99.1 ± 2.6% for saliva. LOD for saliva was 0.12 ng/mL and for urine 0.05 ng/mL; LOQ was 0.4 ng/mL and 0.8 ng/mL, respectively. Intraday and interday precision equaled, respectively, 1.2% and 3.4% for urine, and 2.3% and 6.4% for saliva. There was a strong correlation between salivary cotinine and the uncorrected cotinine concentration in urine in the second and third trimesters of pregnancy. The cutoff values were established for saliva 12.9 ng/mL and urine 42.3 ng/mL or 53.1 μg/g creatinine with the ROC curve analysis. The developed analytical method was successfully applied to quantify cotinine, and a significant correlation between the urinary and salivary cotinine levels was found. The presented cut-off values for salivary and urinary cotinine ensure a categorization of the smoking status among pregnant women that is more accurate than self-reporting.
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Affiliation(s)
- Joanna Stragierowicz
- Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Lodz, Poland
| | - Karolina Mikołajewska
- Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Lodz, Poland
| | | | - Kinga Polańska
- Department of Environmental Epidemiology, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Lodz, Poland
| | - Danuta Ligocka
- Department of Toxicology and Carcinogenesis, Nofer Institute of Occupational Medicine, 8 Teresy Street, 91-348 Lodz, Poland
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Yuan C, Kosewick J, Wang S. A simple, fast, and sensitive method for the measurement of serum nicotine, cotinine, and nornicotine by LC-MS/MS. J Sep Sci 2013; 36:2394-400. [DOI: 10.1002/jssc.201300220] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 05/17/2013] [Accepted: 05/19/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Chao Yuan
- Department of Clinical Pathology; Cleveland Clinic; Cleveland OH USA
| | - Justin Kosewick
- Department of Clinical Pathology; Cleveland Clinic; Cleveland OH USA
| | - Sihe Wang
- Department of Clinical Pathology; Cleveland Clinic; Cleveland OH USA
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Benjamin-Garner R, Stotts A. Impact of smoking exposure change on infant birth weight among a cohort of women in a prenatal smoking cessation study. Nicotine Tob Res 2013; 15:685-92. [PMID: 22990216 PMCID: PMC3611991 DOI: 10.1093/ntr/nts184] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 07/03/2012] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Despite the known harmful effects of smoking during pregnancy, the highly addicted find it difficult to quit. Decreased smoking may be regarded as a means of harm reduction. There is limited information on the benefits of smoking reduction short of quitting. This study used salivary cotinine to assess the impact of change in smoking exposure on birth weight in full-term infants. METHODS In a prenatal smoking cessation study, smoking status was validated by saliva cotinine at baseline and end of pregnancy (EOP). Salivary cotinine ≥15 ng/ml defined active smoking. Based on salivary cotinine, women were grouped as nonsmoking/quit, light exposure (<150 ng/ml), and heavy exposure (≥150 ng/ml) at baseline and EOP. EOP and baseline smoking status were stratified to form smoking exposure change groups. Mean birth weight was compared among those who quit, reduced, maintained, and increased. RESULTS Smoking cessation was associated with a 299 g increase in birth weight compared with sustained heavy smoking, p = .021. Reduced exposure from heavy to light was associated with a 199 g increase in birth weight compared with sustained heavy exposure, a 103 g increase compared with increased exposure, and a 63 g increase compared with sustained light exposure. Differences among continuing smokers were not statistically significant. CONCLUSIONS Although not statistically significant, the increase in infant birth weight associated with reduction from heavy to light exposure suggests potential for benefit. The only statistically significant comparison was between quitters and sustained heavy smokers, confirming that smoking cessation should remain the goal for pregnant women.
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Affiliation(s)
- Ruby Benjamin-Garner
- Center for Clinical and Translational Sciences, The University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
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Jung S, Lee IS, Kim SB, Moon CS, Jung JY, Kang YA, Park MS, Kim YS, Kim SK, Chang J, Kim EY. Urine Cotinine for Assessing Tobacco Smoke Exposure in Korean: Analysis of the Korea National Health and Nutrition Examination Survey (KNHANES). Tuberc Respir Dis (Seoul) 2012; 73:210-8. [PMID: 23166556 PMCID: PMC3492421 DOI: 10.4046/trd.2012.73.4.210] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 09/03/2012] [Accepted: 09/26/2012] [Indexed: 11/24/2022] Open
Abstract
Background The level of urine cotinine is an indicator of tobacco smoke exposure. The purpose of this study is to investigate urine cotinine for the purpose of assessing the smoking status of Korean smokers and non-smokers exposed to tobacco smoke. Methods The subjects were identified from the 2007-2009 and the 2010 data sets of the Korea National Health and Nutrition Examination Survey (KNHANES). They were assigned as non-smokers, current smokers and ex-smokers. Non-smokers were also divided into three subset groups according to the duration of smoke exposure. Each group was stratified by gender prior to analysis. Results The median value of urine cotinine in the male current smokers was 1,221.93 ng/mL which was the highest among all groups. The difference between levels of urine cotinine for male and the female groups was statistically significant (p<0.01). In the female group, passive smoke exposure groups reported higher urine cotinine levels than non-exposure groups (p=0.01). The cutoff point for the discrimination of current smokers from non-smokers was 95.6 ng/mL in males and 96.8 ng/mL in females. The sensitivity and specificity were 95.2% and 97.1%, respectively, in males, 96.1% and 96.5% in females. However, the determination of urine cotinine level was not useful in distinguishing between passive smoke exposure groups and non-exposure groups. Conclusion Urine cotinine concentration is a useful biomarker for discriminating non-smokers from current smokers. However, careful interpretation is necessary for assessing passive smoke exposure by urine cotinine concentration.
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Affiliation(s)
- Sungmo Jung
- Division of Pulmonology, Department of Internal Medicine, Severance Hospital, Yonsei University College of Medicine, Seoul, Korea
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Mahn A, Lienqueo ME, Quilodrán C, Olivera-Nappa A. Purification of transthyretin as nutritional biomarker of selenium status. J Sep Sci 2012; 35:3184-9. [DOI: 10.1002/jssc.201200646] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 08/21/2012] [Accepted: 08/22/2012] [Indexed: 12/16/2022]
Affiliation(s)
- Andrea Mahn
- Department of Chemical Engineering; Universidad de Santiago de Chile; Chile
| | - María Elena Lienqueo
- Department of Chemical and Biotechnology Engineering; University of Chile; Santiago Chile
| | - Claudia Quilodrán
- Department of Chemical and Biotechnology Engineering; University of Chile; Santiago Chile
| | - Alvaro Olivera-Nappa
- Department of Chemical and Biotechnology Engineering; University of Chile; Santiago Chile
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Da Silva FR, Da Silva J, Nunes E, Benedetti D, Kahl V, Rohr P, Abreu MB, Thiesen FV, Kvitko K. Application of the buccal micronucleus cytome assay and analysis of PON1Gln192Arg and CYP2A6*9(-48T>G) polymorphisms in tobacco farmers. ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2012; 53:525-34. [PMID: 22847926 DOI: 10.1002/em.21713] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Accepted: 05/31/2012] [Indexed: 06/01/2023]
Abstract
Tobacco is a major Brazilian cash crop. Tobacco farmers apply large amounts of pesticides to control insect growth. Workers come into contact with green tobacco leaves during the tobacco harvest and absorb nicotine through the skin. In the present study, micronucleus frequency, cell death, and the frequency of basal cells were measured in tobacco farmers using the buccal micronucleus cytome assay (BMCyt), in parallel with measurement of blood butyrylcholinesterase (BChE) and nicotine levels. Polymorphisms in PONIGln192Arg and CYP2A6*9(-48T>G) were evaluated to verify the relationship between genetic susceptibility and the measured biomarkers. Peripheral blood and buccal cell samples were collected from 106 agricultural workers, at two different crop times (during pesticide application and leaf harvest), as well as 53 unexposed controls. BMCyt showed statistically significant increases in micronuclei, nuclear buds, and binucleated cells among exposed subjects in differentiated cells, and in micronuclei in basal cells. In addition, the exposed group showed higher values for condensed chromatin, karyorrhectic, pyknotic, and karyolitic cells, indicative of cell death, and an increase in the frequency of basal cells compared to the unexposed control group. A slight difference in mutagenicity using the BMCyt assay was found between the two different sampling times (pesticide application and leaf harvest), with higher micronucleus frequencies during pesticide application. Elevated cotinine levels were observed during the leaf harvest compared to the unexposed controls, while BChE level was similar among the farmers and controls. PONIGln192Arg and CYP2A6*9(-48T>G) polymorphisms were associated with DNA damage induced by pesticides and cell death.
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Affiliation(s)
- Fernanda Rabaioli Da Silva
- Department of Genetics and Molecular Biology, Postgraduate Program in Genetics and Molecular Biology (PPGBM), Federal University of Rio Grande do Sul (UFRGS), Porto Alegre-RS, Brazil
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Analysis of alkaloids from different chemical groups by different liquid chromatography methods. OPEN CHEM 2012. [DOI: 10.2478/s11532-012-0037-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
AbstractAlkaloids are biologically active compounds widely used as pharmaceuticals and synthesised as secondary methabolites in plants. Many of these compounds are strongly toxic. Therefore, they are often subject of scientific interests and analysis. Since alkaloids — basic compounds appear in aqueous solutions as ionized and unionized forms, they are difficult for chromatographic separation for peak tailing, poor systems efficiency, poor separation and poor column-to-column reproducibility. For this reason it is necessity searching of more suitable chromatographic systems for analysis of the compounds. In this article we present an overview on the separation of selected alkaloids from different chemical groups by liquid chromatography thus indicating the range of useful methods now available for alkaloid analysis. Different selectivity, system efficiency and peaks shape may be achieved in different LC methods separations by use of alternative stationary phases: silica, alumina, chemically bonded stationary phases, cation exchange phases, or by varying nonaqueous or aqueous mobile phase (containing different modifier, different buffers at different pH, ion-pairing or silanol blocker reagents). Developments in TLC (NP and RP systems), HPLC (NP, RP, HILIC, ion-exchange) are presented and the advantages of each method for alkaloids analysis are discussed.
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da Fonseca B, Moreno I, Magalhães A, Barroso M, Queiroz J, Ravara S, Calheiros J, Gallardo E. Determination of biomarkers of tobacco smoke exposure in oral fluid using solid-phase extraction and gas chromatography–tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 889-890:116-22. [DOI: 10.1016/j.jchromb.2012.02.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2011] [Revised: 01/18/2012] [Accepted: 02/07/2012] [Indexed: 12/14/2022]
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Noworyta K, Kutner W, Wijesinghe CA, Srour SG, D’Souza F. Nicotine, Cotinine, and Myosmine Determination Using Polymer Films of Tailor-Designed Zinc Porphyrins as Recognition Units for Piezoelectric Microgravimetry Chemosensors. Anal Chem 2012; 84:2154-63. [DOI: 10.1021/ac2021344] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Krzysztof Noworyta
- Institute of Physical Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224
Warsaw, Poland
| | - Wlodzimierz Kutner
- Institute of Physical Chemistry, Polish Academy of Science, Kasprzaka 44/52, 01-224
Warsaw, Poland
- Faculty
of Mathematics and Natural
Sciences, School of Science, Cardinal Stefan Wyszynski University, Dewajtis 5, 01-815 Warsaw, Poland
| | - Channa A. Wijesinghe
- Department of Chemistry, University of North Texas, 1155 Union Circle, No. 305070,
Denton, Texas 76203-5017, United States
| | - Serge G. Srour
- Department of Chemistry, University of North Texas, 1155 Union Circle, No. 305070,
Denton, Texas 76203-5017, United States
| | - Francis D’Souza
- Department of Chemistry, University of North Texas, 1155 Union Circle, No. 305070,
Denton, Texas 76203-5017, United States
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Hou H, Xiong W, Zhang X, Song D, Tang G, Hu Q. LC-MS-MS Measurements of Urinary Creatinine and the Application of Creatinine Normalization Technique on Cotinine in Smokers' 24 Hour Urine. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2012; 2012:245415. [PMID: 23209947 PMCID: PMC3503330 DOI: 10.1155/2012/245415] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 08/29/2012] [Accepted: 08/31/2012] [Indexed: 05/03/2023]
Abstract
A simple and sensitive high performance liquid chromatography-tandem mass spectrometry (HPLC-ESI-MS-MS) method was developed and validated for the quantification of creatinine in human urine. The analysis was carried out on an Agilent Zorbax Eclipse XDB-C18 column (2.1 × 150 mm, 3.5 μm). The mobile phase was 0.1% formic acid in water and 0.1% formic acid in acetonitrile (50/50, v/v). Linear calibration curves were obtained in the concentration range of 1-2000.0 ng/mL, with a lower limit of quantification of 0.99 ng/mL. The intra- and interday precision (RSD) values were below 3%. The method was successfully applied to a bioequivalence study of creatinine in Chinese smokers and nonsmokers. The total cotinine in 24 h urine and cotinine : creatinine ratio were also positively associated (Pearson R = 0.942, P < 0.0001). However, cotinine : creatinine ratio varied significantly across smoking groups for the difference of individual. 24 h urinary cotinine was more appropriate for expressing correlation with tar than cotinine : creatinine ratio.
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Affiliation(s)
- Hongwei Hou
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- *Hongwei Hou: and
| | - Wei Xiong
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
| | - Xiaotao Zhang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
| | - Dongkui Song
- Department of Urology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Gangling Tang
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
| | - Qingyuan Hu
- China National Tobacco Quality Supervision and Test Center, Zhengzhou 450001, China
- *Qingyuan Hu:
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Machado JDB, Plínio Filho VM, Petersen GO, Chatkin JM. Quantitative effects of tobacco smoking exposure on the maternal-fetal circulation. BMC Pregnancy Childbirth 2011; 11:24. [PMID: 21453488 PMCID: PMC3076296 DOI: 10.1186/1471-2393-11-24] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2010] [Accepted: 03/31/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Despite the existence of various published studies regarding the effects of tobacco smoking on pregnancy, and especially in regards to placental blood flow and vascular resistance, some points still require clarification. In addition, the amount of damage due to tobacco smoking exposure that occurs has not been quantified by objective means. In this study, we looked for a possible association between flow resistance indices of several arteries and the levels of urinary cotinine and the concentration of carbon monoxide in the exhaled air (COex) of both smoking and non-smoking pregnant women. We also looked for a relationship between those findings and fetal growth and birth weight. METHODS In a prospective design, thirty pregnant smokers and thirty-four pregnant non-smokers were studied. The volunteers signed consent forms, completed a self-applied questionnaire and were subjected to Doppler velocimetry. Tobacco smoking exposure was quantified by subject provided information and confirmed by the measurement of urinary cotinine levels and by the concentration of carbon monoxide in the exhaled air (COex). The weight of newborns was evaluated immediately after birth. RESULTS Comparing smoking to non-smoking pregnant women, a significant increase in the resistance index was observed in the uterine arteries (P = 0.001) and umbilical artery (P = 0.001), and a decrease in the middle cerebral artery (P = 0.450). These findings were associated with progressively higher concentrations of COex and urinary cotinine. A decrease in the birth weight was also detected (P < 0.001) in association with a progressive increase in the tobacco exposure of the pregnant woman. CONCLUSIONS In pregnant women who smoke, higher arterial resistance indices and lower birth weights were observed, and these findings were associated with increasing levels of tobacco smoking exposure. The values were significantly different when compared to those found in non-smoking pregnant women. This study contributes to the findings that smoking damage during pregnancy is dose-dependent, as demonstrated by the objective methods for measuring tobacco smoking exposure.
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Affiliation(s)
- Julia de B Machado
- Obstetrics, Sao Lucas Hospital da Pontificia Universidade Catolica do Rio Grande do Sul, Rio Grande do Sul, Porto Alegre, Brazil.
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Hu CW, Chang YZ, Wang HW, Chao MR. High-throughput simultaneous analysis of five urinary metabolites of areca nut and tobacco alkaloids by isotope-dilution liquid chromatography-tandem mass spectrometry with on-line solid-phase extraction. Cancer Epidemiol Biomarkers Prev 2010; 19:2570-81. [PMID: 20713654 DOI: 10.1158/1055-9965.epi-10-0483] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
BACKGROUND Areca nut and tobacco are commonly used drugs worldwide and have been frequently used in combination. We describe the use of on-line solid-phase extraction and isotope-dilution liquid chromatography-tandem mass spectrometry for the simultaneous measurement of five major urinary metabolites of both areca nut and tobacco alkaloids, namely, arecoline, arecaidine, N-methylnipecotic acid, nicotine, and cotinine. METHODS Automated purification of urine was accomplished with a column-switching device. After the addition of deuterium-labeled internal standards, urine samples were directly analyzed within 13 minutes. This method was applied to measure urinary metabolites in 90 healthy subjects to assess areca nut/tobacco exposure. Urinary time course of arecoline, arecaidine, and N-methylnipecotic acid was investigated in five healthy nonchewers after oral administration of areca nut water extracts. RESULTS The limits of detection were 0.016 to 0.553 ng/mL. Interday and intraday imprecision were <10%. Mean recoveries of five metabolites in urine were 97% to 114%. Mean urinary concentrations of arecoline, arecaidine, N-methylnipecotic acid, nicotine, and cotinine in regular areca nut chewers also smokers were 23.9, 5,816, 1,298, 2,635, and 1,406 ng/mg creatinine, respectively. Time course study revealed that after administration of areca nuts extracts, the major urinary metabolite was arecaidine with a half-life of 4.3 hours, followed by N-methylnipecotic acid with a half-life of 7.9 hours, and very low levels of arecoline with a half-life of 0.97 hour. CONCLUSIONS This on-line solid-phase extraction liquid chromatography-tandem mass spectrometry method firstly provides high-throughput direct analysis of five urinary metabolites of areca nut/tobacco alkaloids. IMPACT This method may facilitate the research into the oncogenic effects of areca nut/tobacco exposure.
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Affiliation(s)
- Chiung-Wen Hu
- Department of Public Health, Chung Shan Medical University, Taichung 402, Taiwan
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Rodríguez-Gonzalo E, García-Gómez D, Herrero-Hernández E, Carabias-Martínez R. Automated sample treatment with the injection of large sample volumes for the determination of contaminants and metabolites in urine. J Sep Sci 2010; 33:2240-9. [DOI: 10.1002/jssc.201000202] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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