Sertoli cells decrease microglial response and increase engraftment of human hNT neurons in the hemiparkinsonian rat...

Area of Science:

• Neuroscience
• Immunology
• Cell Biology

Background:

• Sertoli cells (SCs) support germ cell development and have shown immunosuppressive properties in extra-testicular transplants.
• Microglial activation is a key factor in graft rejection within the central nervous system (CNS).

Purpose of the Study:

• To investigate the efficacy of Sertoli cells in mitigating microglial infiltration and activation within neural grafts in a hemiparkinsonian rat model.
• To assess the impact of Sertoli cells on xenograft survival and integration in the brain.

Main Methods:

• Human neuron-like (hNT) cells were implanted into the lesioned striatum of hemiparkinsonian rats, either alone or co-transplanted with rat SCs.
• Immunohistochemistry was employed to evaluate xenograft survival, size, and microglial infiltration/activation three months post-transplantation.

Main Results:

• Co-transplantation with SCs significantly increased the survival and size of the hNT neuron xenografts.
• Fewer microglia were observed in the grafted tissue of animals that received SCs, indicating reduced immune cell infiltration and activation.
• SCs maintained their immunosuppressive function within the brain environment.

Conclusions:

• Sertoli cells possess potent immunosuppressive capabilities that extend to the CNS, protecting neural xenografts from immune attack.
• The localized immunosuppression provided by SCs offers a promising strategy for improving the success of neural transplantation therapies for neurodegenerative diseases.
• SCs represent a potential alternative cell source for enhancing neural graft survival and therapeutic efficacy across species.