Cyclic amplification of remodeling bone regeneration process via cerium-energized spinning hydrogel biomembrane for rescuing osteoporotic bone defects.

• Hydrogel spinning membrane achieved a controllable and responsive release of cerium ions. • Establishing a beneficial self-amplifying cycle between cerium release and accelerating osteogenesis. • Simultaneously exerts the "one stone, three birds" effect of promoting osteogenesis, inhibiting osteoclasts, and accelerating angiogenesis. The heightened activity of osteoclasts and diminished function of osteoblasts observed in individuals with osteoporosis present additional complexities in the management of critical bone defects. Consequently, an improved approach is urgently required to enhance bone regeneration in patients with osteoporosis. Our effective strategy involves the integration of hydrogels with spinning membrane technology, and accurately replicates the composition and structure of the native extracellular matrix found in periosteum tissues. Cerium, as a substitute for conventional protein growth factors, facilitates osteogenic differentiation and angiogenesis in stem cells, concurrently impeding bone resorption. In this study, we successfully synthesized a biomimetic electrospun hydrogel periosteum, grafted cerium ions onto the membrane via non-covalently bound phosphate, and achieved cyclic amplification of bone regeneration. This approach represents a pioneering and efficient utilization of tissue-engineered bionic periosteum to address osteoporotic bone defects. [ABSTRACT FROM AUTHOR]

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