Decellularised matrices from force loaded periodontal ligament stem cells support osteogenic differentiation

Area of Science:

• Biomaterials Science
• Stem Cell Biology
• Periodontal Regeneration

Background:

• Periodontal ligament stem cells (hPDLSCs) are crucial for periodontal tissue repair and respond to mechanical stimuli.
• The extracellular matrix (ECM) plays a vital role in regulating cell behavior and tissue regeneration.
• Developing effective cell-free scaffolds is essential for advancing periodontal regeneration therapies.

Purpose of the Study:

• To investigate the impact of decellularized ECM (dECM) derived from hPDLSCs subjected to intermittent compressive force (ICF) on osteogenic differentiation.
• To characterize the structural and compositional properties of ICF-treated dECM.
• To evaluate the potential of dECM-ICF as a scaffold for promoting periodontal regeneration.

Main Methods:

• hPDLSCs were subjected to ICF (1.5 g/cm² for 24 h) and cultured in normal or osteogenic medium before decellularization.
• dECM-ICF was characterized using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and proteomic analysis.
• hPDLSCs were cultured on dECM-ICF, and cell proliferation, viability, and mineralization were assessed.

Main Results:

• dECM-ICF preserved key ECM components like fibronectin and type I collagen, exhibiting a fibrillar network structure.
• dECM-ICF demonstrated excellent biocompatibility, supporting hPDLSC attachment, proliferation, and viability without cytotoxicity.
• dECM-ICF derived from osteogenic medium significantly enhanced mineral deposition compared to that from normal medium.

Conclusions:

• dECM derived from ICF-treated hPDLSCs supports cell growth and osteogenic differentiation.
• dECM-ICF is a promising cell-free natural scaffold for promoting periodontal regeneration.
• The study highlights the potential of mechanically preconditioned dECM in enhancing regenerative therapies.