The Epigenetic Clock and Biological Age
I recently developed a DNA methylation based biomarker of aging known as the "epigenetic clock", which can be used to measure the DNA methylation (DNAm) age of any human (or chimpanzee) tissue, cell type, or fluid that contains DNA (with the exception of sperm).
DNA methylation age of blood has been shown to predict all-cause mortality in later life, even after adjusting for known risk factors, which suggests that it relates to the biological aging process. Similarly, markers of physical and mental fitness are also
found to be associated with the epigenetic clock (lower abilities associated with age acceleration). These results suggest that we may be close to achieving a long standing milestone in aging research: the development of an accurate measure of tissue age or
even biological age. I will present several applications of this measure of tissue age, e.g. obesity and trisomy 21.