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Background A large number of analysis strategies are available for DNA methylation (DNAm) array and RNA-seq datasets, but it is unclear which strategies are best to use. We compare commonly used strategies and report how they influence results in large cohort studies. Results We tested the associations of DNAm and RNA expression with age, BMI, and smoking in four different cohorts (n = ~ 2900)....
Summary The Barker hypothesis states that size at birth is negatively associated with disease risk later in life. Numerous studies have tested and confirmed this hypothesis in singletons. Using twin (or sibling) data, several extensions of the Barker hypothesis may be considered: 1.Within pairs, is the smallest twin also the one with the highest disease risk later in life? Since twins (or siblings)...
Epigenetic mechanisms may play an important role in the etiological pathways of schizophrenia. Since the epigenetic status of the genome partly depends on environmental factors in pre- and postnatal environments, exposure to such factors should be taken into account in epigenetic studies of schizophrenia. Prenatal famine and childhood ethnic minority status have been identified as environmental risk...
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