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Updated: Jun 6, 2026

Optimized Bone Sampling Protocols for the Retrieval of Ancient DNA from Archaeological Remains
06:18

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Published on: November 30, 2021

Nuclear DNA typing from ancient teeth.

Cecilia Sosa1, Miriam Baeta, Carolina Núñez

  • 1Department of Forensic Medicine, Faculty of Medicine, University of Zaragoza, Zaragoza, Spain.

The American Journal of Forensic Medicine and Pathology
|November 11, 2010
PubMed
Summary

Ancient DNA extraction from human remains is challenging due to diagenesis. Teeth offer better nuclear DNA preservation for genetic typing than bones, even with advanced PCR methods.

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Area of Science:

  • Forensic anthropology
  • Paleogenetics
  • Molecular biology

Background:

  • Diagenesis significantly degrades ancient DNA, complicating genetic typing of skeletal remains.
  • Advanced molecular techniques are crucial for analyzing compromised DNA samples.

Observation:

  • Nuclear DNA analysis was performed on two medieval human skeletons.
  • Teeth yielded reliable nuclear DNA profiles, while bone DNA analyses were inconclusive.
  • A complete nuclear mini short tandem repeat (STR) profile was obtained from a premolar.

Findings:

  • Increasing polymerase chain reaction (PCR) sensitivity enabled a full STR profile from a femur, despite initial partial results.
  • Artifacts were observed in bone DNA analysis, highlighting the need for cautious interpretation.
  • Dental DNA proved more resilient to degradation than bone DNA, even in well-preserved femurs.

Implications:

  • Dental DNA offers a more promising source for successful genetic typing of ancient human remains compared to bones.
  • The protective structure of dental enamel likely preserves DNA integrity better than bone.
  • These findings refine ancient DNA extraction and analysis strategies for forensic and anthropological studies.