Undoing one protein tweak switches muscle genes back on in cancer's wasting disease — in the lab

Up to 80% of people with advanced cancer develop cachexia, a wasting of muscle that no current treatment can cure. A team led by Arnab Nayak at Hanover Medical School in Germany has traced part of the mechanism: in wasting muscle, a protein called L3mbtl2 collects too many molecular tags (a process called SUMOylation), which pries it off the DNA and switches off the genes that maintain muscle. When the researchers edited the exact spot where the tags attach — in cells and in mice — the protein stayed on duty, the muscle genes switched back on, and the wasting partly reversed. The study, in Cell Death Discovery, is early lab work, but it names a precise, druggable target in a condition that has resisted treatment for decades.

SDG 3 · Good health and well-being — Mechanism: tech innovation