Modulation of the mesenchymal stem cell migration capacity via preconditioning with topographic microstructure

Area of Science:

• Biomaterials Science
• Stem Cell Biology
• Regenerative Medicine

Background:

• Mesenchymal stem cells (MSCs) possess significant therapeutic potential, but controlling their behavior, particularly migration, is crucial for effective application.
• Current methods to influence MSC migration are diverse, yet efficient physical preconditioning strategies are continuously sought.
• Understanding the cellular mechanisms underlying MSC migration modulation is key to advancing regenerative medicine.

Purpose of the Study:

• To investigate the impact of topographic microstructures on polystyrene (PS) culture surfaces as a physical preconditioning method for modulating MSC migration.
• To assess the effect of microscale roughness on the mobilization velocity and migratory behavior of human adipose-derived mesenchymal stem cells (hADSCs).
• To examine the involvement of key signaling pathways, specifically focal adhesion kinase (FAK) and mitogen-activated protein kinase (MAPK), in microtopography-induced MSC responses.

Main Methods:

• Creation of polystyrene culture vessel surfaces with varying topographic microstructures at the microscale.
• Preconditioning of human adipose-derived mesenchymal stem cells (hADSCs) on these engineered surfaces.
• Analysis of cell migration trajectories after reseeding to quantify mobilization velocity.
• Biochemical assays to measure the activation levels of focal adhesion kinase (FAK) and mitogen-activated protein kinase (MAPK).

Main Results:

• Brief preconditioning with specific microtopographies significantly promoted the mobilization velocity of hADSCs.
• The enhanced migration velocity persisted even after the removal of the microstructured surface.
• Elevated activation levels of FAK and MAPK were observed in hADSCs during and following the microtopography preconditioning.

Conclusions:

• Topographic microstructures on culture surfaces offer a feasible physical strategy to enhance MSC migration.
• This preconditioning approach effectively modulates hADSC mobilization velocity and key intracellular signaling pathways (FAK, MAPK).
• Transplantation of stem cells preconditioned with microtopography holds promise for enhancing therapeutic efficacy in regenerative medicine applications.