Proline-producing enzyme P5CS identified as a key driver of metabolic fatty liver disease
Peer-Reviewed Publication
Updates every hour. Last Updated: 21-Dec-2025 13:11 ET (21-Dec-2025 18:11 GMT/UTC)
Metabolic dysfunction-associated steatotic liver disease (MASLD), a spectrum of liver conditions ranging from simple steatosis to steatohepatitis (MASH), fibrosis, and cirrhosis, represents a global health epidemic with no approved pharmacotherapies.
The liver plays a central role in maintaining systemic energy homeostasis during fasting by mobilizing lipid reserves, a process often accompanied by transient hepatic steatosis. Dimethylarginine dimethylaminohydrolase 1 (DDAH1), a key enzyme metabolizing asymmetric dimethylarginine (ADMA), has been shown to protect against NAFLD under nutrient-overload conditions. However, its role in the physiological context of fasting remained elusive.
Why do some children develop a brain that is too small (microcephaly)? An international research team involving the German Primate Center – Leibniz Institute for Primate Research (DPZ), Hannover Medical School (MHH), and the Max Planck Institute of Molecular Cell Biology and Genetics has used human brain organoids to investigate how changes in important structural proteins in the cell lead to this severe developmental disorder (EMBO Reports).
Researchers from ETH Zurich have modified a bacterial transport system so that it can efficiently introduce large quantities of unnatural amino acids into cells, disguised as a kind of Trojan horse.
All organisms manufacture their proteins from the same 20 amino acids. Additionally, unnatural amino acids can be used to produce designer proteins with new functions.
The new system allows the efficient biotechnological mass production of these designer proteins. Applications range from precise therapeutics and more efficient catalysts to improved imaging techniques.