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Shindo Y, Kuribara H, Matsuoka T, Futo S, Sawada C, Shono J, Akiyama H, Goda Y, Toyoda M, Hino A, Asano T, Hiramoto M, Iwaya A, Jeong SI, Kajiyama N, Kato H, Katsumoto H, Kim YM, Kwak HS, Ogawa M, Onozuka Y, Takubo K, Yamakawa H, Yamazaki F, Yoshida A, Yoshimura T. Validation of Real-Time PCR Analyses for Line-Specific Quantitation of Genetically Modified Maize and Soybean UsingNew Reference Molecules. J AOAC Int 2019. [DOI: 10.1093/jaoac/85.5.1119] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
Novel analytical methods based on real-time quantitative polymerase chain reactions by use of new reference molecules were validated in interlaboratory studies for the quantitation of genetically modified (GM) maize and soy. More than 13 laboratories from Japan, Korea, and the United States participated in the studies. The interlaboratory studies included 2 separate stages: (1) measurement tests of coefficient values, the ratio of recombinant DNA (r-DNA) sequence, and endogenous DNA sequence in the seeds of GM maize and GM soy; and (2) blind tests with 6 pairs of maize and soy samples, including different levels of GM maize or GM soy. Test results showed that the methods are applicable to the specific quantitation of the 5 lines of GM maize and one line of GM soy. After statistical treatment to remove outliers, the repeatability and reproducibility of these methods at a level of 5.0% were <13.7 and 15.9%, respectively. The quantitation limits of the methods were 0.50% for Bt11, T25, and MON810, and 0.10% for GA21, Event176, and Roundup Ready soy. The results of blind tests showed that the numerical information obtained from these methods will contribute to practical analyses for labeling systems of GM crops.
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Affiliation(s)
- Yoichiro Shindo
- Fundamental Research Laboratory, Asahi Breweries Ltd., 1-1-21 Midori, Moriya, Kitasoma-gun, Ibaraki 302-0106, Japan
| | - Hideo Kuribara
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Takeshi Matsuoka
- Center for Food Quality, Labeling and Consumer Services, 1-21-2 Kitabukuro, Saitama, Saitama 330-9731, Japan
| | - Satoshi Futo
- FASMAC Co., Ltd., 5-1-3 Midorigaoka, Atsugi, Kanagawa 243-0041, Japan
| | - Chihiro Sawada
- Japan Frozen Foods Inspection Corp., Nishi-1 Koyo, Higashinada-ku, Kobe, Hyogo 658-0033, Japan
| | - Jinji Shono
- Somatech Center, House Foods Co., 1-4 Takanodai, Yotsukaido, Chiba 284-0033, Japan
| | - Hiroshi Akiyama
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Yukihiro Goda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Masatake Toyoda
- National Institute of Health Sciences, Ministry of Health, Labour and Welfare, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan
| | - Akihiro Hino
- National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Kobayashi K, Katsumoto H, Murakoso K, Matsuoka A. Glucose interferes in fluorometry of serum citrate in diabetic patients with hyperglycemia. Clin Chem 1987. [DOI: 10.1093/clinchem/33.10.1940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- K Kobayashi
- Dept. of Clin. Pathol., Hyogo College of Medicine, Nishinomiya, Japan
| | - H Katsumoto
- Dept. of Clin. Pathol., Hyogo College of Medicine, Nishinomiya, Japan
| | - K Murakoso
- Dept. of Clin. Pathol., Hyogo College of Medicine, Nishinomiya, Japan
| | - A Matsuoka
- Dept. of Clin. Pathol., Hyogo College of Medicine, Nishinomiya, Japan
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