刚读了一篇综述: The role of longitudinal cohort studies in epigenetic epidemiology: challenges and opportunities 其中专门讲到了DNA甲基化纵向队列研究的方法学现在还处于原始探索阶段,原因当然是-现在还没有像样的时间序列数据(大多已经发表的只有1-2个时间点)。 看样子只有有了超过5,6个时间点的数据,这个领域才能慢慢建立自己的方法学啊。 但是,老外很厉害,好词好句都已经想好了“Box 2: Longitudinal modeling strategies for high-dimensional data” : http://genomebiology.com/content/13/6/246
2015新发表的文献: DNA extracted from saliva for methylation studies of psychiatric traits: Evidence tissue specificity and relatedness to brain. 主要结论: 1. 通过DNA甲基化信息,可以用唾液采集来研究精神疾病; 2. 唾液DNA甲基化比血液variance更大 There was more variability in CpG sites from saliva than blood, which may reflect its heterogeneity. 3. 相对血液,唾液DNA甲基化更“象”脑部变化; Finally, DNA methylation in saliva appeared more similar to patterns from each of the brain regions examined overall than methylation in blood. http://www.ncbi.nlm.nih.gov/pubmed/25355443