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Neural stimulation and modulation with sub-cellular precision by optomechanical bio-dart.

Guoshuai Zhu1, Jianyun Xiong1, Xing Li1

  • 1Guangdong Provincial Key Laboratory of Nanophotonic Manipulation, Institute of Nanophotonics, College of Physics and Optoelectronic Engineering, Jinan University, Guangzhou, 511443, China.

Light, Science & Applications
|September 19, 2024
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Summary

Researchers developed an optomechanical bio-dart from sunflower pollen for precise neural stimulation. This method allows subcellular control of neuronal activity and can be used for drug delivery and in vivo studies.

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Area of Science:

  • Neuroscience
  • Biophysics
  • Biotechnology

Background:

  • High-resolution neural stimulation is vital for understanding neuronal function and disease.
  • Current methods face challenges in achieving subcellular precision and biocompatibility.

Purpose of the Study:

  • To develop a novel optomechanical method for precise neural stimulation and modulation at the subcellular level.
  • To demonstrate the application of this technique for drug delivery and in vivo studies.

Main Methods:

  • Utilized optically controlled bio-darts derived from sunflower pollen.
  • Propelled bio-darts using optical scattering force via an optical fiber probe.
  • Achieved submicrometer spatial resolution for neural stimulation via mechanosensitive ion channel activation.

Main Results:

  • Demonstrated controllable modulation of single neurons, including subcellular structures like dendrites, axons, and soma.
  • Showcased the bio-dart's capability as a drug delivery tool.
  • Successfully performed in vivo neural stimulation in larval zebrafish.

Conclusions:

  • The optomechanical bio-dart offers a novel approach for high-precision neural stimulation and modulation.
  • This technique holds promise for advancing research in neuronal plasticity and neuromodulation.