"Newcastle scientists and medics have developed a new type of genetic blood test that diagnoses scarring in the liver  even before someone may feel ill. It is the first time an epigenetic signature in blood has been discovered which is diagnostic of the severity of fibrosis for people with Nonalcoholic Fatty Liver Disease NAFLD. NAFLD caused by being overweight or having diabetes affects one in three people in the UK and may progress to cirrhosis and liver failure requiring a transplant. Scientific breakthrough Publishing in the academic journal GUT the Newcastle team describe the proof of principle research in which they measure specific epigenetic markers to stratify NAFLD patients into mild or severe liver scarring known as fibrosis. Dr Quentin Anstee Clinical Senior Lecturer at Newcastle University Consultant Hepatologist within the Newcastle Hospitals and joint senior author explained what it could mean for patients This scientific breakthrough has great promise because the majority of patients show no symptoms. Routine blood tests cant detect scarring of the liver and even more advanced noninvasive tests can really only detect scarring at a late stage when it is nearing cirrhosis. We currently have to rely on liver biopsy to measure fibrosis at its early stages  by examining a piece of the liver under the microscope. We know that the presence of even mild fibrosis of the liver predicts a worse longterm outcome for patients with NAFLD and so its important to be able to detect liver scarring at an early stage.  Providing a scale of damage In this first stage of research the team developed the blood analysis in  patients with NAFLD. The test detects chemical changes on tiny amounts of cellfree DNA that are released into the blood when liver cells are injured. Changes in DNA methylation at genes like PPAR that controls scar formation are then used to stratify patients by fibrosis severity. Senior author Dr Jelena Mann of Newcastle Universitys Institute for Cellular Medicine added This is the first time that a DNA methylation signature from the blood has been shown to match the severity of a liver disease. It opens up the possibility of an improved blood test for liver fibrosis in the future. Dr Timothy Hardy is a hepatology registrar within Newcastle Hospitals and a Medical Research Councilfunded clinical research training fellow at the University. He conducted the research as part of his PhD project and said We are now working on confirming these findings in a larger group of patients. If we are able to accurately tell the extent of a persons liver damage with a blood test and even track the scarring as it gets better or worse it could provide reassurance for patients save NHS resources and avoid patients having to undergo a liver biopsy. This research is part of Newcastle Universitys response to the challenges and opportunities presented by an ageing population. Newcastle University is a world leader in the field at its Campus for Ageing and Vitality the location for a new m National Centre for Ageing Science and Innovation NASI. This research was supported by the National Institute for Health Research NIHR Biomedical Research Centre. The research was made possible through Newcastle Academic Health Partners a collaboration involving Newcastle Upon Tyne Hospitals NHS Foundation Trust Northumberland Tyne and Wear NHS Foundation Trust and Newcastle University. This partnership harnesses worldclass expertise to ensure patients benefit sooner from new treatments diagnostics and prevention strategies. Reference Plasma DNA Methylation A Potential Biomarker for Stratification of Liver Fibrosis in Non Alcoholic Fatty Liver Disease. Timothy Hardy Mujdat Zeybel Christopher P. Day Christian Dipper Steven Masson Stuart McPherson Elsbeth Henderson Dina Tiniakos Steve White Jeremy French Derek A. Mann Quentin M. Anstee and Jelena Mann.  Gut DOI .gutjnl  stages of Nonalcoholic Fatty Liver Disease NAFLD is very common in patients who are overweight obese or have type  diabetes. It develops in four stages. Most people will only ever develop the first stage usually without realising it.  In a small number of cases it can progress and eventually lead to liver damage cirrhosis and liver cancer if not detected and managed. The main stages of NAFLD are . Steatosis fatty liver  a buildup of fat in the liver cells that is often picked up as an incidental finding during tests carried out for another reason  . Nonalcoholic steatohepatitis NASH  a more serious form of NAFLD where the liver has become inflamed this is estimated to affect up to  of the UK population  . Fibrosis  where persistent inflammation causes scar tissue to form in the liver but the liver is still able to function normally  . Cirrhosis  the most severe stage occurring after years of inflammation where the liver shrinks and becomes scarred and lumpy this damage is permanent and can lead to liver failure where the liver stops working properly and liver cancer It can take years for fibrosis or cirrhosis to develop and the presence of this scarring predicts those people with the worse prognosis. Its important to make lifestyle changes to prevent the disease from getting worse. INFORMATION MODIFIED FROM NHS CHOICES WITH UPDATES BASED ON CURRENT EVIDENCE"