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About Cancer Research UK Cambridge Institute

The Cancer Research UK Cambridge Institute aims to bring the scientific strengths of Cambridge to bear on practical questions of cancer diagnosis, treatment and prevention. The Institute focuses specifically on the practical application of high-quality basic research.

Cancer Research UK Cambridge Institute Headquarter Location

University of Cambridge Li Ka Shing Centre, Robinson Way

Cambridge, England, CB2 0RE,

United Kingdom

Latest Cancer Research UK Cambridge Institute News

Mutations in liver cells linked to liver disease and fat metabolism

Oct 14, 2021

14-10-2021 For the first time, DNA mutations in liver cells have been identified that impact metabolism and insulin sensitivity in patients with liver disease. These mutations are specific to liver disease that is associated with obesity, type 2 diabetes, and chronic alcohol consumption. The study, from the Wellcome Sanger Institute, the Cancer Research UK Cambridge Institute, the Cancer Grand Challenges Mutographs team, and collaborators, identified five genes that are mutated in people with liver disease and offered a deeper understanding about the role that three of these play in the disordered fat metabolism seen in non-alcoholic fatty liver disease (NAFLD) and chronic alcohol consumption. The research, published in Nature , shows that these mutations reduce the sensitivity of liver cells to insulin, with resistance to insulin activity being the hallmark of type 2 diabetes. These findings demonstrate that mutations acquired during a person’s life could impair the liver’s ability to respond normally to dietary sugars and fats. In the future, understanding the pattern of genetic mutations in a patient’s liver could help identify the correct diagnosis. These patterns of mutations could also be used to characterise different subtypes of liver disease, possibly helping to match treatments to each group. Also, while more studies are needed, this research could lead to a potential new model for understanding how mutations in specific cell types can contribute to systemic metabolic diseases, such as diabetes. Currently, it is estimated that there are roughly 1.5 billion cases of chronic liver disease worldwide*, with liver disease being the third leading cause of premature death in the UK**. The most common causes of chronic liver disease are chronic alcohol consumption, viral hepatitis, and NAFLD, which is linked to obesity and type 2 diabetes. This new research analysed 1590 genomes from 34 patient liver samples, including healthy livers and those with liver disease. The team identified five genes in liver cells, otherwise known as hepatocytes, that are mutated in patients who had liver disease. Three of these were genes that have a direct impact on how liver cells metabolise fat and respond to insulin. When there is high consumption of alcohol or calories, insulin signals to the liver cells to take up, process, and store a large amount of fat. If this is sustained for long periods of time, the burden of storing this excess fat damages the cells, leading to inflammation, chronic liver disease and ultimately scarring (cirrhosis) of the liver. Cells that have mutations in the genes identified in the paper do not react to insulin signalling and therefore do not take up the fats. This allows them to escape the damage caused by storing excess fat, and enables these mutated cells to survive and grow. However, although these mutations provide a benefit to the individual liver cell, they may impair that cell’s ability to contribute to the function of the liver as a whole. Remarkably, many of the patients had multiple independent mutations in metabolism genes. In some patients, this led to mutations collectively impacting up to 15-25 per cent of the entire liver, and having such a high number of liver cells carrying mutations could lead to organ-wide changes in liver function. Within an individual patient’s liver, the same metabolism gene was often recurrently mutated. However, between different patients, the pattern of mutations was different, suggesting that it might be possible to spilt liver diseases into different subgroups defined by their patterns of mutations. With further research, it may be possible to develop and match novel treatments to these subgroups. Dr Stanley Ng, first author and Postdoctoral Fellow at the Wellcome Sanger Institute, said: “Liver disease is a complex disease that often sits at the centre of other issues and conditions such as obesity and type 2 diabetes. However, the relationship between these diseases is poorly understood. While further studies are needed to understand the genetic links between these conditions, and what the clinical consequences of the mutations are for our patients, our research leads to fascinating new understanding of systemic diseases and how to diagnose, manage, and treat them.” Dr Matthew Hoare, senior author, Advanced Clinician Scientist at the Cancer Research UK Cambridge Institute and member of the CRUK Cambridge Centre Early Detection Programme, said: “Understanding the role of these, and other, mutations in liver disease could help identify those who will be at higher risk of future complications, such as metabolic issues or liver cancer. Interestingly, none of the mutations in metabolism genes were linked to the development of liver cancer, possibly because cancer cells are hungry for nutrients and these mutations may actually disrupt the cells’ ability to meet those metabolic demands. This information may prove useful in understanding the changes experienced by a liver cancer as it evolves from a background of chronic liver disease.” Dr David Scott, Director of Cancer Grand Challenges at Cancer Research UK, said: “The Cancer Grand Challenges Mutographs team is helping to transform our understanding of the link between mutations and cancer. This study demonstrates that the breadth of that work goes beyond cancer, including helping us to learn more about the role of mutations in other diseases, like liver disease.” Dr Peter Campbell, senior author and Head of Cancer, Ageing and Somatic Mutation, and Senior Group Leader at the Wellcome Sanger Institute, and co-investigator of the Cancer Grand Challenges Mutographs team, said: “Mutations acquired in specific cell types, such as liver cells, have not previously been suspected of contributing to the biology of conditions such as obesity and type 2 diabetes. This is the joy of science – we started this study hoping to understand how liver cancer emerges from chronic liver disease, but instead wind up proposing an exciting new model in which the same genetic event is acquired many times independently within the liver, collectively accounting for a considerable fraction of liver cells. The mutations might protect the liver cells from toxicity, but only by enabling those cells to shirk their metabolic duties.” Notes: *Moon AM, Singal AG, Tapper EB. (2020) Contemporary Epidemiology of Chronic Liver Disease and Cirrhosis. Clin Gastroenterol Hepatol. DOI: 10.1016/j.cgh.2019.07.060 . **British Liver Trust Statistics. Available at [Accessed 15/09/2021] Publication: Stanley W. K. Ng, Foad J. Rouhani, Simon F. Brunner, Natalia Brzozowska, et al. (2021) Convergent somatic mutations in metabolism genes in chronic liver disease. Nature. DOI: 10.1038/s41586-021-03974-6 Image credit: To read more information, click here. The Wellcome Sanger Institute is a world-leading genomics research centre, based on the Wellcome Genome Campus, arguably the largest single-site community of expertise in Genomes and BioData in the world. We undertake large-scale research that forms the foundations of knowledge in biology and medicine. We are open and collaborative; our data, results, tools and technologies are shared across the globe to advance science. Our ambition is vast – we take on projects that are not possible anywhere else. Wellcome Sanger Institute

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