Electrically controlled delivery of cargo into single human neural stem cell

Area of Science:

• Biotechnology
• Cell Biology
• Nanotechnology

Background:

• Nanoprobe techniques offer efficient single-cell manipulation and analysis.
• Precise control over cellular processes is crucial for biological research and therapeutic applications.

Purpose of the Study:

• To develop and demonstrate a whole-electrical single-cell manipulation tool for rapid and controllable cargo delivery.
• To enable real-time monitoring of cell penetration during cargo delivery using conductive nanoprobes.

Main Methods:

• Fabrication of electrically sensitive nanoprobes integrated with indium tin oxide electrode chips.
• Utilizing changes in electrical current to monitor nanoprobe penetration into neural stem cells.
• Controllable assembly and release of quantum dots (QDs) onto nanoprobes using the electrical system.

Main Results:

• The system effectively monitored cell penetration via distinct negative current spikes.
• Cargo assembly onto nanoprobes reached maximum load within 10 minutes without chemical linkers.
• Cargo release into the intracellular environment occurred rapidly (<10 seconds).

Conclusions:

• The developed whole-electrical system offers a novel, efficient method for cargo delivery into single cells.
• This technology eliminates complex chemical modifications, reducing processing time and potential cell damage.
• The system facilitates precise, real-time monitoring and manipulation of cellular processes.