来自墨西哥Tezonteopan的个体的营养补充,牙冠大小和特征表达
Erin C Blankenship-Sefczek1,2, Alan H Goodman3, Mark Hubbe2
1Department of Oral Biology, School of Dentistry, Creighton University, Omaha, Nebraska, United States of America.
PloS one
|June 6, 2024
概括
营养压力会影响牙的发育,导致牙变小,导致非补充剂组的牙尖端间距变化. 这些发现揭示了环境因素如何通过对牙的表观遗传影响影响人类生物关系.
科学领域:
- * 古人类学与人类进化
- * 牙科人类学 牙科人类学
- * 生物考古学 生物考古学
背景情况:
- *表观遗传因素显著影响牙表型,为人类人口生物学提供了洞察力.
- * 牙特征可以作为理解生物关系和发育条件的标记.
研究的目的:
- * 调查营养补充对牙现象型的影响,特别是牙冠尺寸,牙尖间距和辅助牙尖表达.
- * 探索营养压力与特定牙特征之间的关系,如卡拉贝利特征,Cusp 5和结核牙.
- * 为了测试模式级联模型 (PCM) 对骨辅助特征的适用性.
主要方法:
- *分析了来自墨西哥Tezonteopan的营养补充和非补充个体的上牙造型.
- *比较摩尔冠的大小和主要尖端间距的测量.
- *评估辅助尖端表达,包括卡拉贝利特征和Cusp 5,以及前牙的结核牙频率.
主要成果:
- *营养压力与减少间间距的关系比群体之间的冠状尺寸差异更大.
- * 没有补充剂的组显示出更高的Cusp 5频率和表达,有一些证据表明更高的卡拉贝利特征得分.
- * 在没有补充的组中,前牙 (中切牙,) 呈现出较小的冠状尺寸和减少结核牙的频率.
- * 辅助柱尖端与主要尖端之间较近的半距离距离有关,支持模式级联模型.
结论:
- *营养压力明显影响牙发育,特别是辅助尖端表达和前牙形态.
- * 牙的特征可以作为过去人口的发育条件和环境影响的敏感指标.
- *这些发现有助于理解表观遗传对人类变异和生物关系的影响.
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