DNA甲基化
CpG站点
甲基化
回归
相关性
表观遗传学
回归分析
生物
计算生物学
皮尔逊积矩相关系数
相关系数
线性回归
肿瘤科
生物信息学
医学
遗传学
统计
DNA
基因
基因表达
数学
几何学
作者
Jiansheng Zhang,Hongli Fu,Yan Xu
出处
期刊:Genes
[MDPI AG]
日期:2021-06-06
卷期号:12 (6): 870-870
被引量:8
标识
DOI:10.3390/genes12060870
摘要
In recent years, scientists have found a close correlation between DNA methylation and aging in epigenetics. With the in-depth research in the field of DNA methylation, researchers have established a quantitative statistical relationship to predict the individual ages. This work used human blood tissue samples to study the association between age and DNA methylation. We built two predictors based on healthy and disease data, respectively. For the health data, we retrieved a total of 1191 samples from four previous reports. By calculating the Pearson correlation coefficient between age and DNA methylation values, 111 age-related CpG sites were selected. Gradient boosting regression was utilized to build the predictive model and obtained the R2 value of 0.86 and MAD of 3.90 years on testing dataset, which were better than other four regression methods as well as Horvath’s results. For the disease data, 354 rheumatoid arthritis samples were retrieved from a previous study. Then, 45 CpG sites were selected to build the predictor and the corresponded MAD and R2 were 3.11 years and 0.89 on the testing dataset respectively, which showed the robustness of our predictor. Our results were better than the ones from other four regression methods. Finally, we also analyzed the twenty-four common CpG sites in both healthy and disease datasets which illustrated the functional relevance of the selected CpG sites.
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