3D Printing PLA/Gingival Stem Cells/ EVs Upregulate miR-2861 and -210 during Osteoangiogenesis Commitment

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Bone regeneration requires an osteogenic and angiogenic microenvironment.
• 3D-printed biomaterials, particularly poly(lactide) (3D-PLA), combined with mesenchymal stem cells (MSCs) and extracellular vesicles (EVs), show promise.

Purpose of the Study:

• To evaluate the osteogenic and angiogenic potential of 3D-PLA/hGMSC/EV constructs for bone tissue regeneration.
• To investigate the role of specific microRNAs (miR-2861 and miR-210) in osteoangiogenesis.

Main Methods:

• In vitro assessment of osteogenic and angiogenic markers (RUNX2, VEGFA, OPN, COL1A1) in 3D-PLA/hGMSC/EV constructs.
• In vivo implantation of constructs in rat calvarial defects.
• Histological examination and MicroCT analysis for bone regeneration and vascularization.
• Evaluation of miR-2861 and miR-210 expression.

Main Results:

• In vitro studies showed increased expression of osteogenic and angiogenic markers.
• In vivo studies demonstrated enhanced bone regeneration and vascularization in rat calvarial defects.
• Upregulation of miR-2861, miR-210, RUNX2, VEGFA, OPN, and COL1A1 was observed.

Conclusions:

• Extracellular vesicles (EVs) significantly enhance bone regeneration and vascularization when combined with 3D-PLA/hGMSC constructs.
• EVs may act as a novel regulatory system in osteoangiogenesis, promoting bone healing.
• This approach holds potential for advancing regenerative medicine strategies for bone defects.