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Rapid Identification of Chemical Genetic Interactions in Saccharomyces cerevisiae
Published on: April 5, 2015
Fast and sensitive detection of genetically modified yeasts in wine
Carlos León1, Virginia García-Cañas, Ramón González
1Laboratory of Foodomics, Institute of Food Science Research (CSIC), Nicolas Cabrera 9, Campus de Cantoblanco, 28049 Madrid, Spain.
Journal of Chromatography. A
|February 8, 2011
Summary
A new method using multiplex polymerase chain reaction (PCR) and capillary gel electrophoresis with laser induced fluorescence (CGE-LIF) allows fast, sensitive detection of genetically modified yeasts in wine. This technique ensures reliable identification of transgenic yeasts within a single working day.
Area of Science:
- Food Science
- Molecular Biology
- Analytical Chemistry
Background:
- Genetically modified (GM) yeasts are increasingly used in food production, necessitating reliable detection methods.
- Ensuring the authenticity of wine requires methods to detect the presence of GM yeasts.
- Existing methods for GM yeast detection can be time-consuming or lack sensitivity.
Purpose of the Study:
- To develop a novel, rapid, and sensitive screening methodology for detecting genetically modified yeasts in wine.
- To optimize DNA extraction from wine samples for successful downstream analysis.
- To validate the use of multiplex PCR combined with CGE-LIF for unambiguous GM yeast identification.
Main Methods:
- Development of a multiplex polymerase chain reaction (PCR) assay targeting specific DNA segments of a recombinant yeast strain (Saccharomyces cerevisiae EKD-13).
- Investigation and optimization of yeast DNA extraction methods from wine matrices.
- Application of capillary gel electrophoresis with laser induced fluorescence (CGE-LIF) for high-resolution separation and sensitive detection of amplified DNA fragments.
- Inclusion of an amplification control to ensure DNA quality.
Main Results:
- The optimized DNA extraction protocols yielded amplifiable DNA from wine samples.
- Multiplex PCR successfully amplified specific transgenic DNA segments and an internal control.
- CGE-LIF demonstrated high sensitivity, speed, and resolution, with low variability in DNA migration times (<0.82% RSD within-capillary, <1.92% RSD between-capillaries).
- Accurate size determination of PCR products was achieved with an error <4% compared to theoretical values.
Conclusions:
- The combined multiplex PCR and CGE-LIF methodology provides a fast (<1 working day) and sensitive approach for detecting genetically modified yeasts in wine.
- The method is robust, offering reliable identification of transgenic yeasts with high precision.
- This technique addresses the challenge of detecting GM yeasts in complex wine matrices, contributing to food authenticity and safety.
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