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Thermoluminescence characterization of minerals extracted from dried oregano for retrospective and/or sterilization dosimetry. RADIAT MEAS 2022. [DOI: 10.1016/j.radmeas.2022.106850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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2
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Fujiwara T, Fukui N, Kitagawa Y, Kajimura K, Obana H, Ishikawa E, Furuta M, Takatori S. Estimation of Irradiation Doses of Raw Beef Liver Samples using 5,6-Dihydrothymidine as an Irradiation Marker. ACS OMEGA 2019; 4:12325-12332. [PMID: 31460350 PMCID: PMC6682059 DOI: 10.1021/acsomega.9b01357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 07/05/2019] [Indexed: 06/10/2023]
Abstract
The quantities of (5S)- and (5R)-5,6-dihydrothymidine (total DHdThd) in frozen beef liver samples were compared between those irradiated by an electron beam (EB) and those subjected to γ-irradiation. DNA extracted from the samples was enzymatically digested to nucleosides and analyzed by liquid chromatography-tandem mass spectrometry for total DHdThd and 2'-deoxythymidine (dThd). Total DHdThd was formed radiospecifically and dose-dependently and the dose-response curves of the ratio of total DHdThd to dThd (total DHdThd/dThd) were similar for both the EB- and γ-irradiated samples. The total DHdThd/dThd was stable after long-term storage (4 months) at -20 °C and the followed heat treatment in a microwave oven. The total DHdThd/dThd could be a robust marker and is equally effective at quantitating both EB- and γ-ray irradiation history. The irradiation doses of raw beef liver samples were estimated using the dose-response curves of the total DHdThd/dThd of other irradiated samples. The ratio of the estimated dose to the actual dose was 0.74-1.30 in the irradiation range of 4.67-7.62 kGy.
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Affiliation(s)
- Takuya Fujiwara
- Division
Hygienic Chemistry, Osaka Institute of Public
Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Naoki Fukui
- Division
Hygienic Chemistry, Osaka Institute of Public
Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Yoko Kitagawa
- Division
Hygienic Chemistry, Osaka Institute of Public
Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Keiji Kajimura
- Division
Hygienic Chemistry, Osaka Institute of Public
Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Hirotaka Obana
- Division
Hygienic Chemistry, Osaka Institute of Public
Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
| | - Etsuko Ishikawa
- Laboratory
of Quantum-Beam Chemistry and Biology, Radiation Research Center, Osaka Prefecture University, 1-2 Gakuen-cho,
Naka-ku, Sakai 599-8570, Osaka, Japan
| | - Masakazu Furuta
- Laboratory
of Quantum-Beam Chemistry and Biology, Radiation Research Center, Osaka Prefecture University, 1-2 Gakuen-cho,
Naka-ku, Sakai 599-8570, Osaka, Japan
| | - Satoshi Takatori
- Division
Hygienic Chemistry, Osaka Institute of Public
Health, Nakamichi 1-3-69, Higashinari-ku, Osaka 537-0025, Japan
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Fukui N, Takatori S, Kitagawa Y, Fujiwara T, Ishikawa E, Fujiyama T, Kajimura K, Furuta M, Obana H. Rapid and Reliable Method for Determining Irradiation Histories of Ground Beef and Prawns by Measuring 5,6-Dihydrothymidine. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:9342-9352. [PMID: 28954193 DOI: 10.1021/acs.jafc.7b03266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A rapid and reliable method for determining irradiation histories of ground beef and prawns was developed on the basis of a method for determining the irradiation history of beef liver by liquid chromatography-tandem mass spectrometry (LC-MS/MS) of 5,6-dihydrothymidine (DHdThd). Improvements in the method included the following: (1) 50% ethanol precipitation in the DNA extraction step was conducted before the RNase step, (2) snake venom phosphodiesterase I was used for DNA digestion to boost liberation of DHdThd, and (3) a matrix-matched calibration curve was used for determining DHdThd by LC-MS/MS analysis. This method successfully determined irradiation histories of ground beef and prawns. Furthermore, a close correlation between the formation of DHdThd and 2-alkylcyclobutanones, which are an established index of irradiation histories, was observed in ground beef. DHdThd in DNA could be a promising candidate for a new index of irradiation histories of various foods.
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Affiliation(s)
- Naoki Fukui
- Division of Hygienic Chemistry, Osaka Institute of Public Health , Nakamichi 1-3-69, Higashinari-ku, Osaka, Japan
- Laboratory of Quantum-Beam Chemistry and Biology, Radiation Research Center, Osaka Prefecture University , 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| | - Satoshi Takatori
- Division of Hygienic Chemistry, Osaka Institute of Public Health , Nakamichi 1-3-69, Higashinari-ku, Osaka, Japan
| | - Yoko Kitagawa
- Division of Hygienic Chemistry, Osaka Institute of Public Health , Nakamichi 1-3-69, Higashinari-ku, Osaka, Japan
| | - Takuya Fujiwara
- Division of Hygienic Chemistry, Osaka Institute of Public Health , Nakamichi 1-3-69, Higashinari-ku, Osaka, Japan
| | - Etsuko Ishikawa
- Laboratory of Quantum-Beam Chemistry and Biology, Radiation Research Center, Osaka Prefecture University , 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| | - Takatomo Fujiyama
- Laboratory of Quantum-Beam Chemistry and Biology, Radiation Research Center, Osaka Prefecture University , 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| | - Keiji Kajimura
- Division of Hygienic Chemistry, Osaka Institute of Public Health , Nakamichi 1-3-69, Higashinari-ku, Osaka, Japan
| | - Masakazu Furuta
- Laboratory of Quantum-Beam Chemistry and Biology, Radiation Research Center, Osaka Prefecture University , 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka, Japan
| | - Hirotaka Obana
- Division of Hygienic Chemistry, Osaka Institute of Public Health , Nakamichi 1-3-69, Higashinari-ku, Osaka, Japan
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Sato M, Todoriki S, Takahashi T, Hafez E, Takasu C, Uehara H, Yamakage K, Kondo T, Matsumoto K, Furuta M, Izumi K. Modifications of azoxymethane-induced carcinogenesis and 90-day oral toxicities of 2-tetradecylcyclobutanone as a radiolytic product of stearic acid in F344 rats. J Toxicol Pathol 2015; 28:99-107. [PMID: 26028819 PMCID: PMC4444508 DOI: 10.1293/tox.2015-0002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Accepted: 01/19/2015] [Indexed: 11/23/2022] Open
Abstract
A 90-day oral toxicity test in rats was performed to evaluate the toxicity of 2-tetradecylcyclobutanone (2-tDCB), a unique radiolytic product of stearic acid. Six-week-old male and female F344 rats (n=15/group) were given 2-tDCB at concentrations of 0, 12, 60 and 300 ppm in a powder diet for 13 weeks. Slight dose-dependent increases in serum total protein and albumin in male rats were found, but these changes were not considered to be a toxic effect. The fasting, but not non-fasting, blood glucose levels of the male rats in the 300 ppm group and female rats in the 60 and 300 ppm groups were lower than those of the controls. Gas chromatography-mass spectrometry analysis showed dose-dependent accumulation of 2-tDCB in adipose tissue, notably in males. Next, we performed an azoxymethane (AOM)-induced two-stage carcinogenesis study. After injection of 6-week-old male F344 rats (n=30/group) once a week for 3 weeks, the animals received 2-tDCB at concentrations of 0, 10, 50 and 250 ppm in a powder diet for 25 weeks. The incidences of colon tumors for the 2-tDCB dosages were 34%, 45%, 40% and 37%, respectively, and were not statistically significant. These data suggest that 2-tDCB shows no toxic or tumor-modifying effects under the present conditions, and that the no-observed-adverse-effect level for 2-tDCB is 300 ppm in both sexes, equivalent to 15.5 mg/kg b.w./day in males and 16.5 mg/kg b.w./day in females.
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Affiliation(s)
- Makoto Sato
- Department of Molecular and Environmental Pathology,
Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15
Kuramoto-cho, Tokushima 770-8503, Japan
| | - Setsuko Todoriki
- Food Safety Division, National Food Research Institute,
2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
| | - Tetsuyuki Takahashi
- Department of Molecular and Environmental Pathology,
Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15
Kuramoto-cho, Tokushima 770-8503, Japan
| | - Ezar Hafez
- Department of Molecular and Environmental Pathology,
Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15
Kuramoto-cho, Tokushima 770-8503, Japan
| | - Chie Takasu
- Department of Molecular and Environmental Pathology,
Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15
Kuramoto-cho, Tokushima 770-8503, Japan
| | - Hisanori Uehara
- Department of Molecular and Environmental Pathology,
Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15
Kuramoto-cho, Tokushima 770-8503, Japan
| | - Kohji Yamakage
- Division of Alternative Toxicology Test, Hatano Research
Institute, Food and Drug Safety Center, 729-5 Ochiai, Hadano, Kanagawa 257-8523,
Japan
| | - Takashi Kondo
- Department of Radiological Sciences, Graduate School of
Medicine and Pharmaceutical Science, University of Toyama, 2630 Sugitani, Toyama 930-0194,
Japan
| | - Kozo Matsumoto
- Department of Animal Medical Sciences, Faculty of Life
Sciences, Kyoto Sangyo University, Motoyama Kamigamo, Kita-ku, Kyoto 603-8555,
Japan
| | - Masakazu Furuta
- Laboratory of Quantum-beam Chemical Biology, Radiation
Research Center, Osaka Prefecture University, 1-2 Gakuen-cho, Sakai, Osaka 599-8570,
Japan
| | - Keisuke Izumi
- Department of Molecular and Environmental Pathology,
Institute of Health Biosciences, The University of Tokushima Graduate School, 3-18-15
Kuramoto-cho, Tokushima 770-8503, Japan
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Takahashi K, Ishii R, Matsumoto R. Rapid analysis of 2-alkylcyclobutanones in irradiated meats, cheese and salmon by direct solvent extraction followed by GPC. Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi) 2013; 54:173-7. [PMID: 23863361 DOI: 10.3358/shokueishi.54.173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
2-Alkylcyclobutanones (2-ACBs) are recognized as a marker of irradiation in lipid-containing food products. Here, a rapid method for the analysis of 2-dodecylcyclobutanone (2-DCB) and 2-tetradecylcyclobutanone (2-TCB) in irradiated food products using direct solvent extraction (DSE) was developed, and the extraction efficiency was compared to that of the Soxhlet extraction method (EN 1785), which is the official method for this analysis. Briefly, 2-ACBs were extracted either by using a Soxhlet apparatus or by DSE with n-hexane. The lipid extract was purified by GPC followed by a silica gel cartridge column. Finally, 2-DCB and 2-TCB were measured using GC-MS/MS. The extraction efficiency of 2-ACBs by the DSE method was similar to that of the Soxhlet extraction method. The trueness of 2-DCB and 2-TCB spiked at 50 ng/g in lipid extracts of beef, pork, chicken, cheese and salmon with the proposed method were 76.6% to 91.6% and 81.3% to 109.0%, respectively. The limits of detection for 2-DCB and 2-TCB in lipid extracts were 15 and 20 ng/g, respectively.
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Affiliation(s)
- Kunihiko Takahashi
- Saitama Prefectural Institute of Public Health, 639-1 Kamiokubo, Sakura-ku, Saitama 338-0824, Japan.
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Paksu U, Aydaş C, Yüce ÜR, Aydın T, Polat M, Engin B. ESR and TL investigations on gamma irradiated linden (Tilia vulgaris). RADIATION AND ENVIRONMENTAL BIOPHYSICS 2013; 52:255-267. [PMID: 23519757 DOI: 10.1007/s00411-013-0465-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Accepted: 03/02/2013] [Indexed: 06/01/2023]
Abstract
Electron spin resonance (ESR) and thermoluminescence (TL) signals induced by gamma irradiation in linden (Tilia vulgaris) were studied for detection and dosimetric purposes. Before irradiation, linden leaf samples exhibit one singlet ESR signal centred at g = 2.0088. Besides this central signal, in spectra of irradiated linden samples, two weak satellite signals situated about 3 mT left (g = 2.0267) and right (g = 1.9883) were observed. Dose-response curves for the left satellite signal and the central single signal were constructed, and it was found that both of these curves can be described best by the combination of two exponential saturation functions. Variable temperature and fading studies at room temperature showed that the radiation-induced radicals in linden leaf samples are very sensitive to temperature. The stabilities of the left satellite (g = 2.0267) and the central single (g = 2.0088) signal at room temperature over a storage period of 126 days turned out to be best described by a sum of two first-order decay functions. The kinetic features of the left satellite signal were studied over the temperature range of 313-373 K. The results indicate that the isothermal decay curves of the left satellite ESR signal also proved to be best fitted by the combination of two first-order decay functions. Fading and annealing studies suggested the existence of two different radiation-induced free radical species. At the same time, Arrhenius plots evidenced two different kinetic regimes with two different activation energies. TL investigation of polyminerals from the linden samples allowed to discriminate clearly between irradiated and unirradiated samples even 75 days after irradiation.
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Affiliation(s)
- Ufuk Paksu
- Department of Physics, Faculty of Science, Dokuz Eylül University, 35160 Buca, İzmir, Turkey
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Chen S, Tsutsumi T, Takatsuki S, Matsuda R, Kameya H, Nakajima M, Furuta M, Todoriki S. Identification of 2-alkylcyclobutanones in nutmeg (Myristica fragrans). Food Chem 2012. [DOI: 10.1016/j.foodchem.2012.02.176] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Soncin S, Panseri S, Rusconi M, Mariani M, Chiesa LM, Biondi PA. Improved determination of 2-dodecylcyclobutanone in irradiated ground beef patties by gas-chromatography–mass-spectrometry (GC/MS) coupled with solid-phase microextraction (SPME) technique. Food Chem 2012. [DOI: 10.1016/j.foodchem.2012.02.089] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Crews C, Driffield M, Thomas C. Analysis of 2-alkylcyclobutanones for detection of food irradiation: Current status, needs and prospects. J Food Compost Anal 2012. [DOI: 10.1016/j.jfca.2011.11.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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