Parathyroid Hormone Applications in Bone Tissue Engineering

Parathyroid hormone (PTH) has emerged as a pivotal agent in bone tissue engineering owing to its unique capacity to stimulate bone formation when administered intermittently. Beyond its systemic anabolic effects, advances in biomaterials have enabled localised delivery of PTH or PTH-related peptides within three-dimensional scaffolds, hydrogels and nanoparticle carriers. Such platforms aim to harness the hormone’s ability to enhance osteoblast differentiation, modulate osteoclast activity and promote vascular ingrowth, thereby accelerating defect repair and improving integration of graft materials. Contemporary studies have focused on tuning release kinetics, optimising dose regimens and elucidating receptor-mediated signalling in both osteogenic and endothelial cell populations. As these approaches mature, they promise to reduce systemic side effects and offer targeted therapies for osteoporotic fractures, critical-sized defects and spinal fusion procedures, with potential for translation into clinical practice across diverse patient populations.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Research from all publishers

In a recent study, a recombinant PTH-related peptide was chemically assembled onto polydopamine-modified 3D bioactive scaffolds to treat osteoporotic bone defects. The scaffold simultaneously retained mechanical strength and delivered PTHrP-1 in a sustained manner, resulting in enhanced ossification, reduced osteoclastogenesis and favourable macrophage polarisation in vitro. Small-animal models of osteoporosis confirmed accelerated defect closure and new bone formation, demonstrating the potential of peptide-functionalised natural scaffolds for clinical translation.

Another investigation employed ultrasonic sonochemical functionalisation of 45S5 bioglass with teriparatide, forming a composite that released the hormone locally at calvarial and tibial defect sites in ovariectomised rats. The modified bioglass supported mesenchymal stem cell adhesion and differentiation without cytotoxicity, and in vivo experiments revealed increased bone volume and mechanical strength in teriparatide-loaded implants compared to controls, highlighting the benefit of combining bioactive glass chemistry with hormone therapy for osteoporosis-related repairs.

A mechanistic study explored the role of endothelial PTH receptor-1 signalling in the regenerative actions of systemic PTH on bone allografts. Using transgenic mice with endothelial-specific receptor deletion, researchers showed that loss of endothelial PTHR1 abolished PTH-induced increases in narrow vessel formation and attenuated new bone deposition at graft sites. Conversely, selective activation of PTHR1 in osteoblasts partially restored osteogenesis. These findings underscore the dual requirement for endothelial and osteoblastic signalling in PTH-mediated vascular modulation and bone regeneration.

Parathyroid Hormone Applications in Bone Tissue Engineering publication trend

The graph below shows the total number of articles in parathyroid hormone applications in bone tissue engineering across all publications each year (not limited to Nature Index journals).

Technical terms

Parathyroid hormone (PTH): An 84-amino-acid endocrine regulator that, when delivered intermittently, exerts anabolic effects on bone.

Teriparatide: A recombinant fragment of PTH (1-34) used clinically to stimulate bone formation.

PTH-related peptide (PTHrP): A peptide sharing PTH receptor activity, employed for localised anabolic stimulation in engineered constructs.

Scaffold: A three-dimensional biomaterial framework designed to support cell attachment, proliferation and tissue formation.

Osteogenesis: The process of new bone formation driven by osteoblast differentiation and matrix deposition.

Osteoclastogenesis: The differentiation and activation of bone-resorbing cells, which is modulated by PTH to balance remodelling.

Angiogenesis: The sprouting and maturation of new blood vessels, essential for nutrient delivery during bone repair.

References

1. A Recombinant Parathyroid Hormone‐Related Peptide Locally Applied in Osteoporotic Bone Defect. Advanced Science (2023).
2. The Local Release of Teriparatide Incorporated in 45S5 Bioglass Promotes a Beneficial Effect on Osteogenic Cells and Bone Repair in Calvarial Defects in Ovariectomized Rats. Journal of Functional Biomaterials (2023).
3. PTH-Induced Bone Regeneration and Vascular Modulation Are Both Dependent on Endothelial Signaling. Cells (2022).