Biologization of Pcl-Mesh Using Platelet Rich Fibrin (Prf) Enhances Its Regenerative Potential In Vitro

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Orthopedic Research

Background:

• Resorbable synthetic scaffolds are crucial for bone regeneration but require biological enhancement.
• Autologous blood-derived matrices, like Platelet-rich fibrin (PRF), offer advantages for improving biomaterial regenerative capacity.
• This study investigates enhancing osteogenic potential of a PCL-mesh scaffold using PRF.

Purpose of the Study:

• To evaluate the influence of biologizing a PCL-mesh scaffold (Osteomesh, OP) with differently centrifuged PRF matrices on primary human osteoblast (pOB) activity in vitro.
• To assess the impact of PRF centrifugation speed on osteogenic markers and cell adhesion.
• To determine the potential of OP-PRF constructs for supporting bone regeneration.

Main Methods:

• A resorbable PCL-mesh scaffold (Osteomesh, OP) was coated with PRF matrices prepared using High (710× g) or Low (44× g) relative centrifugal force (RCF) according to the low-speed centrifugation concept (LSCC).
• OP-PRF constructs were cultured with primary human osteoblasts (pOBs), with uncoated OP serving as a control.
• Osteoblast activity was assessed by measuring VEGF, TGF-β1, PDGF, OPG, IL-8 concentrations, and ALP activity in cell culture supernatants after 3 and 7 days. Osteopontin expression was evaluated using immunofluorescence staining.

Main Results:

• OP+PRF_Low+pOBs showed significantly higher expression of IL-8, TGF-β1, PDGF, and VEGF compared to OP+PRF_High+pOBs and OP+pOBs at both 3 and 7 days.
• Significantly higher alkaline phosphatase (ALP) activity was observed in the OP+PRF_Low+pOBs group compared to the other groups.
• Immunofluorescence revealed a greater number of pOBs adhering to OP+PRF_Low+pOBs compared to OP+PRF_High+pOBs and OP+pOBs.

Conclusions:

• Biologization of PCL-mesh scaffolds with PRF_Low, prepared using LSCC, significantly enhances primary human osteoblast activity and osteogenesis in vitro.
• The combination of Osteomesh with PRF_Low demonstrates promising potential for supporting bone regeneration.
• Further in vivo studies are warranted to validate these findings for potential clinical translation in bone regeneration therapies.