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Spatially Precise Genetic Engineering at the Electrode-Tissue Interface.

Ke Xu1,2,3, Yinan Yang1,2,3, Jianfei Ding1

  • 1CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China.

Advanced Materials (Deerfield Beach, Fla.)
|May 1, 2024
PubMed
Summary
This summary is machine-generated.

This study combines flexible neural electrodes with gene-silencing RNA to precisely engineer the electrode-tissue interface. This approach enables precise genetic modification of neural tissue for improved brain-machine interfaces.

Keywords:
electrode‐tissue interfacegene knockdowngenetic engineeringneural interfaces

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Area of Science:

  • Neuroscience
  • Biomaterials Engineering
  • Genetic Engineering

Background:

  • The electrode-tissue interface is critical for neural recording and modulation.
  • Current research focuses on abiotic materials and structural engineering for neural electrodes.
  • Integrating biotic engineering principles offers a novel approach to enhance this interface.

Purpose of the Study:

  • To develop a versatile system for genetically engineering the electrode-tissue interface.
  • To investigate the effects of specific gene knockdown on neural tissue at the interface.
  • To enable precise control over neural tissue properties for advanced brain-machine interfaces.

Main Methods:

  • Ultraflexible neural electrodes were combined with short hairpin RNAs (shRNAs).
  • shRNAs were designed to silence endogenous genes, specifically phosphatase and tensin homolog deleted on chromosome 10 (PTEN) and polypyrimidine tract-binding protein 1 (PTBP1).
  • The system was tested in mouse models of Parkinson's disease and traumatic brain injury for long-term neural activity monitoring.

Main Results:

  • Achieved shRNA-mediated knockdown of PTEN and PTBP1 in neural tissues at the electrode interface.
  • Demonstrated that PTEN downregulation leads to neuronal cell body enlargement.
  • Enabled long-term monitoring of neural activity post-gene knockdown in disease models.

Conclusions:

  • This integrated abiotic and biotic approach offers precise genetic engineering of the electrode-tissue interface.
  • The system facilitates precise control over neural tissue properties, enhancing electrode performance.
  • Paves the way for regenerative electronics and next-generation brain-machine interfaces.