Experimental protein change eases cancer-linked muscle loss in early tests
Cancer-induced cachexia is a severe muscle-wasting condition that affects up to 80% of cancer patients and contributes to 30% to 50% of cancer deaths, yet no curative treatment exists. Researchers at Hannover Medical School studied how tumor-released cytokines reprogram muscle-cell metabolism and reduce calcium release, which weakens muscle contraction. Their latest work, published in Cell Death Discovery, describes the mechanism and points to a possible future causal therapy.
Cachexia is a devastating muscle-wasting syndrome tied to cancer. Tumor-derived inflammatory cytokines can drive it, and it is linked to a large share of cancer deaths. No curative therapy currently exists; care often aims at symptoms through nutrition and exercise.
At Hannover Medical School, Arnab Nayak’s group studies SUMOylation, a stress-responsive protein-tagging process. In mouse and cell models, cancer-induced cachexia raised SUMOylation in skeletal muscle, disturbed calcium balance, disorganized sarcomeres, and weakened contraction. Unexpectedly, L3mbtl2, usually a gene repressor, switched on many muscle-specific genes. The Cell Death Discovery report suggests a possible causal treatment path.
Count? First para: Cachexia(1) is2 a3 devastating4 muscle-wasting5 syndrome6 tied7 to8 cancer9. Tumor-derived10 inflammatory11 cytokines12 can13 drive14 it15, and16 it17 is18 linked19 to20 a21 large22 share23 of24 cancer25 deaths26. No27 curative28 therapy29 currently30 exists31; care32 often33 aims34 at35 symptoms36 through37 nutrition38 and39 exercise40. Second: At1 Hannover2 Medical3 School4, Arnab5 Nayak’s6 group7 studies8 SUMOylation9, a10 stress-responsive11 protein-tagging12 process13. In14 mouse15 and16 cell17 models18, cancer-induced19 cachexia20 raised21 SUMOylation22 in23 skeletal24 muscle25, disturbed26 calcium27 balance28, disorganized29 sarcomeres30, and31 weakened32 contraction33. Unexpectedly34, L3mbtl235, usually36 a37 gene38 repressor39, switched40 on41 many