PMID- 32055677 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 2372-7705 (Print) IS - 2372-7705 (Electronic) IS - 2372-7705 (Linking) VI - 16 DP - 2020 Mar 27 TI - Wnt7a Counteracts Cancer Cachexia. PG - 134-146 LID - 10.1016/j.omto.2019.12.011 [doi] AB - Cancer cachexia is a complex metabolic disease so far lacking effective therapy, and it accounts for approximately one third of all cancer-related deaths worldwide. The extracellular ligand Wnt7a has a dual function in skeletal muscle, inducing the anabolic AKT/mammalian target of rapamycin (mTOR) pathway in myofibers and driving muscle stem cell expansion in skeletal muscle, making it a promising candidate for treatment of muscle wasting diseases. In murine and human myotubes, Wnt7a activates the anabolic AKT/mTOR pathway, thereby preventing cachexia-induced atrophy with a single application being sufficient to prevent atrophy independently of the tumor cell type causing cachexia. Addition of Wnt7a also improved activation and differentiation of muscle stem cells in cancer cachexia, a condition under which skeletal muscle regeneration is severely impaired due to stalled muscle stem cell differentiation. Finally, we show that Wnt7a prevents cancer cachexia in an in vivo mouse model based on C26 colon carcinoma cells. Wnt7a has a dual role in cachectic skeletal muscle; that is, it effectively counteracts muscle wasting through activation of the anabolic AKT/mTOR pathway and, furthermore, reverts the loss of muscle stem cell functionality due to cancer cachexia, making Wnt7a a promising candidate for an ameliorative treatment of cancer cachexia. CI - (c) 2020 The Author(s). FAU - Schmidt, Manuel AU - Schmidt M AD - Leibniz Institute on Aging, Fritz Lipmann Institute, Beutenbergstrasse 11, 07745 Jena, Germany. FAU - Poser, Christine AU - Poser C AD - Leibniz Institute on Aging, Fritz Lipmann Institute, Beutenbergstrasse 11, 07745 Jena, Germany. FAU - von Maltzahn, Julia AU - von Maltzahn J AD - Leibniz Institute on Aging, Fritz Lipmann Institute, Beutenbergstrasse 11, 07745 Jena, Germany. LA - eng PT - Journal Article DEP - 20200111 PL - United States TA - Mol Ther Oncolytics JT - Molecular therapy oncolytics JID - 101666776 PMC - PMC7005483 OTO - NOTNLM OT - Wnt7a OT - atrophy OT - cancer cachexia OT - muscle stem cell OT - muscle wasting OT - satellite cell OT - skeletal muscle EDAT- 2020/02/15 06:00 MHDA- 2020/02/15 06:01 PMCR- 2020/01/11 CRDT- 2020/02/15 06:00 PHST- 2019/08/10 00:00 [received] PHST- 2019/12/23 00:00 [accepted] PHST- 2020/02/15 06:00 [entrez] PHST- 2020/02/15 06:00 [pubmed] PHST- 2020/02/15 06:01 [medline] PHST- 2020/01/11 00:00 [pmc-release] AID - S2372-7705(20)30003-6 [pii] AID - 10.1016/j.omto.2019.12.011 [doi] PST - epublish SO - Mol Ther Oncolytics. 2020 Jan 11;16:134-146. doi: 10.1016/j.omto.2019.12.011. eCollection 2020 Mar 27.