Matrix-embedded cells control osteoclast formation

To date, the dogma in the field has been that RANKL, an essential cytokine in osteoclast maturation, is released by osteoblasts as a way to coordinate bone growth and bone loss during adult bone remodeling. Now, Hiroshi Takayanagi and colleagues, as well as Charles O'Brien and colleagues, have independently found that osteocytes are the predominant source of RANKL in the adult mouse. As RANKL signaling is a key target in treating osteoporosis,...