Optical Precise Ablation of Targeted Individual Neurons In Vivo
1School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, P. R. China.
ACS Chemical Neuroscience
|January 13, 2025
Summary
Femtosecond laser ablation targets neurons, causing dysfunction and affecting nearby cells. However, neuronal ensembles maintain function due to redundancy, showing individual neuron roles in networks.
Area of Science:
- Neuroscience
- Cell Biology
- Biophysics
Background:
- Targeted cell ablation is crucial for understanding neuronal networks.
- Multiphoton ablation offers noninvasiveness and single-cell resolution.
- The impact of ablated neuron activity on ensembles remains unclear.
Purpose of the Study:
- To investigate targeted neuron ablation using femtosecond laser microscopy.
- To elucidate the effects of single-neuron dysfunction on neuronal ensembles.
- To understand the role of individual neurons within functional networks.
Main Methods:
- Utilized femtosecond laser ablation via two-photon microscopy in vitro and in vivo.
- Induced photoporation to damage cell membranes and depolarize neurons.
- Observed Ca2+ responses in surrounding neurons and ensemble activity.
Main Results:
- Laser ablation successfully depolarized targeted neurons, preventing action potentials.
- Dysfunctional neurons affected neighboring cell responses and ensemble activity.
- Ensemble function remained intact despite individual neuron ablation, indicating redundancy.
Conclusions:
- Femtosecond laser ablation is effective for targeted neuron inactivation.
- Neuronal ensembles exhibit functional redundancy, tolerating individual neuron loss.
- This study provides insights into targeted ablation and individual neuron roles in ensembles.
