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基于采集方法的唾液样本表观遗传甲基化差异的检查

Mirna Ghemrawi¹, Nicole Fernandez-Tejero¹, Lia Vaquero¹

¹Department of Chemistry and Biochemistry, Florida International University, Miami, Florida, USA.

Electrophoresis

|February 22, 2024

概括

唾液的法医DNA分析需要了解收集方法如何影响DNA甲基化标记. 这项研究表明,采样地点和采集技术显著改变甲基化水平,这对于准确的体液识别至关重要.

科学领域:

法医科学法医科学法医科学
表观遗传学在表观遗传学中,表观遗传学是指表观遗传学.
分子生物学分子生物学

背景情况:

DNA甲基化标记物用于识别法医案例中的体液.
唾液 (口腔液) 具有复杂的细胞组成,可能会影响甲基化分析.
以前的研究还没有广泛探索不同唾液收集方法如何影响甲基化模式.

研究的目的:

研究各种采集方法和采样地点对唾液中DNA甲基化水平的影响.
在不同收集技术中评估已建立的唾液特异性表观遗传标记的可靠性.
为了比较唾液甲基化概况与其他体液的概况.

主要方法:

分析了四个CpG标记物 (BCAS4,SLC12A8,SOX2OT,FAM43A) 使用来自20个个人的口腔,唇,舌头,唾液和鼻的DNA.
经过测试的模拟法医样本 (口香糖,香烟).
提取DNA,进行二硫酸盐转化,使用定制测试放大,并通过热测序分析,将结果与精液,血液,阴道和月经血液样本进行比较.

主要成果:

甲基化水平因采样地点和采集方法而有显著差异.
608个样本的热测序证实了采集技术对表观遗传标志物概况的影响.
已建立的唾液标记显示了取决于样本如何获得的变化.

结论:

采集方法和采样地点是影响唾液中DNA甲基化水平的关键因素.
这些发现强调了在开发用于体液识别的表观遗传标记时评估各种收集和沉积方法的必要性.
准确的法医鉴定需要考虑样本处理对表观遗传数据的潜在影响.

关键词:

的DNA甲基化标记物.身体液体 ID 标识法医表观遗传学法医表观遗传学烧烧测序 (pyrosequencing) 是一种测序方法.这是唾液,唾液.

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