Oh, JuhyunSinha, IndranilTan, Kah YongRosner, BernardDreyfuss, Jonathan M.Gjata, OrnelaTran, PeterShoelson, StevenWagers, Amy2017-01-032016Oh, Juhyun, Indranil Sinha, Kah Yong Tan, Bernard Rosner, Jonathan M. Dreyfuss, Ornela Gjata, Peter Tran, Steven E. Shoelson, and Amy J. Wagers. 2016. “Age-associated NF-κB signaling in myofibers alters the satellite cell niche and re-strains muscle stem cell function.” Aging (Albany NY) 8 (11): 2871-2884. doi:10.18632/aging.101098. http://dx.doi.org/10.18632/aging.101098.1945-4589http://nrs.harvard.edu/urn-3:HUL.InstRepos:29739147Skeletal muscle is a highly regenerative tissue, but muscle repair potential is increasingly compromised with advancing age. In this study, we demonstrate that increased NF-κB activity in aged muscle fibers contributes to diminished myogenic potential of their associated satellite cells. We further examine the impact of genetic modulation of NF-κB signaling in muscle satellite cells or myofibers on recovery after damage. These studies reveal that NF-κB activity in differentiated myofibers is sufficient to drive dysfunction of muscle regenerative cells via cell-non-autonomous mechanisms. Inhibition of NF-κB, or its downstream target Phospholipase A2, in myofibers rescued muscle regenerative potential in aged muscle. Moreover, systemic administration of sodium salicylate, an FDA-approved NF-κB inhibitor, decreased inflammatory gene expression and improved repair in aged muscle. Together, these studies identify a unique NF-κB regulated, non-cell autonomous mechanism by which stem cell function is linked to lipid signaling and homeostasis, and provide important new targets to stimulate muscle repair in aged individuals.en-USsatellite cellskeletal muscleagingregenerationJournal Article2017-01-0310.18632/aging.101098