Cascades From Caspase‐Dependent Osteoblast Death to Purinergic Signaling in the Pathogenesis of Osteoporosis: Novel Roles of Caspases in Bone Remodeling
Dying cells actively secrete ATP as a ‘find‐me’ signal, which is detected by P2 purinergic receptors on macrophages and activates intracellular purinergic signaling to initiate apoptotic cell clearance. Hyperactivation of purinergic signaling due to excessive extracellular ATP (eATP) is associated with various pathol...