REVERSAL OF FIBRONECTIN-INDUCED HIPPOCAMPAL DEGENERATION WITH ENCAPSULATED MESENCHYMAL STROMAL CELLS

Area of Science:

• Neuroscience
• Regenerative Medicine
• Cell Biology

Background:

• Mesenchymal stromal cells (MSC) exhibit tissue-protective properties by modulating inflammatory responses.
• Fibronectin accumulation is observed in pathological conditions, including central nervous system (CNS) trauma, and can harm surrounding tissues.
• Organotypic cultures provide a model to study cellular responses to injury and potential therapeutic interventions.

Purpose of the Study:

• To investigate the tissue-protective effects of encapsulated MSCs (eMSC) in an organotypic injury model.
• To assess the ability of eMSC to mitigate fibronectin-induced damage to organotypic cultures.
• To explore the role of MSC in modulating inflammatory responses and preserving tissue structure post-injury.

Main Methods:

• MSCs were encapsulated in nanoporous alginate beads to allow diffusion while maintaining cellular segregation.
• An organotypic injury model was established using fibronectin culture to induce damage.
• OHC degradation, pyramidal layer integrity, cell death, and microglial activation (IBA-1 expression) were monitored over 14 days.

Main Results:

• Fibronectin exposure led to significant OHC degradation, characterized by decreased slice area, pyramidal layer breakdown, and increased cell death.
• Microglial activation, indicated by elevated IBA-1 expression, was sustained in the presence of fibronectin.
• eMSC treatment significantly reduced OHC degradation, preserved pyramidal layer structure, decreased cell death, and promoted axonal extension.

Conclusions:

• MSCs delivered within a nanoporous alginate matrix demonstrate significant tissue-protective capabilities.
• eMSC treatment effectively reversed fibronectin-induced OHC degradation and maintained tissue integrity in an organotypic model.
• These findings suggest that encapsulated MSCs hold promise for therapeutic strategies aimed at mitigating injury-induced tissue damage.