New DNA Methylation Method for Forensic Age Identification, Study Guides, Projects, Research of Bioinformatics

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Genomics—Forensic Age Identification

Summary: a DNA methylation age inference method, combined with Sequenom MassARRAY technology, can reduce the error of the age to 4.7 years.

Age estimation is one of the most important topics in the field of forensic medicine.

Traditional individual age assessment is based on physical and chemical properties of

bones, teeth and other kinds of materials in organization, along with the age growth of sequential changes. But when forensic samples are tissue debris, hair, stains, etc., this method is often subject to restrictions that can not be achieved or have more errors.

physiological changes and its influencing factors in microsatellite makers, like telomere DNA length and mitochondrial DNA oxidative damage, there are also technical limitations and judge problems.

In recent years, with the development of epigenetics, it is found that there is a

Recently, a new method based on SVR model and DNA methylation is established for

the genome and metagenomics research, which will reduce the error of blood sample age prediction to 4.7 years.

methylation of blood samples from 21 to 32 years old female twins, screening highly correlated sites with individual female age, and verifying in such sites between 20- years female blood samples using Sequenom MassARRAY technology, which will further get six highly correlated sites related to age respectively by ordinary linear regression, multivariate nonlinear regression, neural network and support vector regression (SVR) to estimate age. By comparison, the age error predicted by SVR method is 2.8 years, and would be 4.7 years after cross validation, which is better than the other three methods.

The method is expected to infer sample age of biological origin in forensic practice by

The original article: http://www.cd-genomics.com/blog/index.php/genomics-forensic-

age-identification/.