来自拉脱维亚的铜染的人类骨和牙样本中古代DNA保存的表征
Alise Pokšāne1, Jānis Ķimsis1, Elīna Pētersone-Gordina2
1Latvian Biomedical Research and Study Centre, Riga, Latvia.
Microbiology spectrum
|August 12, 2025
概括
铜涂层显著降低了人类古代DNA (aDNA) 在考古骨和牙中的保存. 严重斑纹的样本是DNA分析的不良来源,影响了古代DNA研究和历史见解.
科学领域:
- 考古遗传学 考古遗传学
- 生物考古学的生物考古学
- 材料科学 材料科学 材料科学
背景情况:
- 铜和铜合金表现出抗菌性质,可能有助于在文物附近保存有机材料.
- 古代DNA (aDNA) 分析为人类历史提供了深刻的见解,但受到样本可用性和保存质量的限制.
- 考古骨头和牙上的铜涂层是一种常见的现象,但它对DNA的影响尚不清楚.
研究的目的:
- 评价铜包的考古样本对于人类和细菌DNA分析的适用性.
- 调查铜涂层对内源性DNA保存和转基因组概况的影响.
- 为了确定斑纹是否会影响从硬组织中恢复DNA的成功.
主要方法:
- 质量评估人类DNA在包裹样本和未包裹样本中的保存情况.
- 使用Kraken2和MEGAN对准工具进行细菌分析.
- 通过比较aDNA产量和不同程度的斑纹样本之间的多样性.
主要成果:
- 包裹样本显示,内源人类DNA的保存显著减少.
- 只有最少包裹的样本才产生了自信的人类aDNA认证.
- 斑纹样本中的细菌群体主要由土壤和水生微生物组成.
结论:
- 铜涂层过程中的矿化严重损害了硬组织中内源性DNA的保存.
- 严重斑纹的样本是古代DNA研究的不可靠来源.
- 在考古遗传学研究的样本选择中,必须将斑点视为一个关键因素.
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