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Sampling and Pretreatment of Tooth Enamel Carbonate for Stable Carbon and Oxygen Isotope Analysis
Published on: August 15, 2018
Time-dependent changes in DNA stability in decomposing teeth over 18 months
Leticia Rubio1, Ignacio Santos, Maria Jesus Gaitan
1Department of Forensic Medicine, University of Malaga, Malaga, Spain.
Acta Odontologica Scandinavica
|July 13, 2012
Summary
Dental DNA degrades over time, with quantity decreasing significantly within the first month and quality declining after 18 months post-extraction. This time-dependent degradation impacts DNA stability in human teeth.
Area of Science:
- Forensic Science
- Molecular Biology
- Genetics
Background:
- Dental DNA analysis is crucial for identification.
- Understanding DNA degradation over time is essential for forensic applications.
- Controlled environmental studies provide insights into DNA stability.
Purpose of the Study:
- To quantitatively and qualitatively analyze dental DNA degradation over time.
- To investigate the impact of post-extraction time on DNA quantity and quality.
- To assess DNA stability in human teeth under controlled conditions.
Main Methods:
- Sixty human teeth were stored for 0-18 months at room temperature.
- DNA quantification used real-time quantitative PCR.
- DNA quality assessed via allelic dropout ratio after STR genotyping.
Main Results:
- DNA concentration decreased significantly by 1 month post-extraction.
- DNA concentration stabilized from 1-12 months, then decreased at 18 months.
- Significant reduction in DNA quality (allelic dropout) was observed only at 18 months.
Conclusions:
- Dental DNA stability decreases over time, affecting both quantity and quality.
- The degradation process is time-dependent within the first 18 months post-extraction.
- Findings have potential applications in determining post-mortem intervals in controlled environments.
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