All the cells in an organism have the exact same genetic sequence. What differs across cell types is their epigenetics—meticulously placed chemical tags that influence which genes get expressed in each cell. If epigenetic changes regulate our genetics, what is regulating them? Salk scientists have now used plant cells to discover that a type of epigenetic tag, called DNA methylation, can be regulated by genetic mechanisms. Prior to this study, scientists had only understood how DNA methylation was regulated by other epigenetic features, so the discovery that genetic features can also guide DNA methylation patterns is a major paradigm shift. Their findings could inform future epigenetic engineering strategies aimed at generating methylation patterns predicted to repair or enhance cell function, with many potential applications in medicine and agriculture.

Mount Sinai study shows that traditional risk scores and symptoms such as chest pain should not be solely relied upon to prevent cardiovascular events