Bioengineered Scaffolds for Bone Regeneration

Bioengineered scaffolds constitute a tailor-made extracellular matrix‐mimicking framework designed to support the repair and regrowth of bone tissue. By combining biodegradable polymers, ceramics and bioactive molecules, these constructs aim to provide mechanical support, guide cell adhesion and differentiation, and regulate the local immune microenvironment. Modern strategies integrate nanoscale features, controlled porosity and stimuli-responsive elements to synchronise degradation with new tissue formation and to deliver biochemical or biophysical cues in situ. Such scaffolds address clinical challenges posed by critical‐sized defects, osteoporosis and complex pathologies, offering off-the-shelf alternatives to traditional grafts and promising accelerated healing, reduced morbidity and improved long-term functionality.

Research from Nature Portfolio

Recent studies have introduced magnetoelectric composite membranes incorporating core–shell particles of cobalt ferrite and barium titanate within a piezoelectric polymer matrix. Under an external magnetic field, these membranes generate surface charges that enhance osteogenic activity. In vivo experiments in cranial defect models demonstrated accelerated bone formation, even in the presence of inflammation or glucocorticoid-induced osteogenesis repression, thereby illustrating a non-invasive, repeatable means to stimulate repair.

Another approach has drawn inspiration from native matrix vesicles by embedding black phosphorus nanosheets within cell-targeting vesicles functionalised with aptamers. The vesicles home to osteogenic cells and, upon photothermal activation, release phosphate ions and heat shock protein-inducing signals to drive biomineralisation. This dual-action mechanism promotes rapid mineral deposition and underpins a bioinspired route to enhance both the speed and quality of bone regeneration.

Bioengineered Scaffolds for Bone Regeneration publication trend

The graph below shows the total number of articles in bioengineered scaffolds for bone regeneration across all publications each year (not limited to Nature Index journals).

Technical terms

Scaffold: A three-dimensional, porous framework designed to support cell attachment, guide tissue ingrowth and degrade in synchrony with regeneration.

Osteogenesis: The process of new bone formation mediated by osteoblast differentiation and extracellular matrix mineralisation.

Osteoimmunomodulation: The strategic regulation of immune cell behaviour to create an environment conducive to bone healing.

Magnetoelectric conversion: The phenomenon whereby magnetic stimuli are transformed into electric charges or potentials within a composite material.

Extracellular vesicles: Nano-scale membrane-bound particles secreted by cells that carry bioactive lipids, proteins and nucleic acids for intercellular communication.

References

1. Advanced strategies of scaffolds design for bone regeneration. BMEMat (2023).
2. In situ activation of flexible magnetoelectric membrane enhances bone defect repair. Nature Communications (2023).
3. Bioinspired extracellular vesicles embedded with black phosphorus for molecular recognition-guided biomineralization. Nature Communications (2019).
4. Hydrogenated silicene nanosheet functionalized scaffold enables immuno‐bone remodeling. Exploration (2023).
5. Bioinspired soft-hard combined system with mild photothermal therapeutic activity promotes diabetic bone defect healing via synergetic effects of immune activation and angiogenesis. Theranostics (2024).
6. Smart‐Responsive Multifunctional Therapeutic System for Improved Regenerative Microenvironment and Accelerated Bone Regeneration via Mild Photothermal Therapy. Advanced Science (2023).