New Study Reveals High Genetic Risk for Diabetes, Heart Disease, and Schizophrenia
A recent study indicates that a significant portion of the global population may carry a high genetic risk for diabetes, cardiovascular disease, and schizophrenia.
Most individuals have a high genetic risk for three common diseases.
The study analyzed data from nearly one million people through major biobanks.
Genetic variations are prevalent, but many do not lead to disease.
A groundbreaking study led by researchers at the University of Exeter has found that a large segment of the global population may have a high genetic predisposition to three prevalent diseases: diabetes, cardiovascular disease, and schizophrenia. This research highlights that genetic factors play a significant role in health, even if individuals do not develop these conditions.
The study examined the average human genome, revealing that it contains approximately five million variants, which are DNA locations that differ among individuals. Among these, around 10,000 variants can affect gene sequences, influencing various traits from lactose intolerance to responses to medications. The findings, published in the journal Genome Medicine, emphasize that genetic variation is common and often biologically neutral.
The research team utilized data from two prominent biobanks: the UK Biobank and the US-based All of Us, encompassing nearly one million individuals. Senior author Caroline Wright noted the increasing importance of whole genome sequencing in diagnosing genetic diseases and the potential for genetic screening to predict health risks. She stated, "Most people are unaware of just how much genetic variation is present in every genome."
Wright further explained that the study's findings could assist clinicians and patients in understanding genetic information better. The researchers also calculated polygenic risk scores for 28 common diseases, estimating that the average individual falls within the top 10 percent for nearly three conditions. Notably, one in five individuals is in the top one percent for at least one polygenic score, indicating a significant genetic risk.
Despite the large scale of the study, the authors acknowledged that the participant pool is predominantly composed of individuals of Western European descent, highlighting the necessity for more diverse genetic data. This research not only sheds light on the genetic risks associated with common diseases but also underscores the importance of context in interpreting genetic testing results, including personal and family health histories.
