Miniature Lunar Rocket: Researchers Build Nanorobot

Researchers at the University of Basel developed a modular nanorobot capable of delivering targeted therapeutic agents, according to a study published in the journal Advanced Functional Materials. Led by Prof. Dr. Cornelia Palivan, the team created a reusable system that uses a magnetic propulsion module and a DNA-based assembly system to target and reduce the viability of cancer cells.

How does the modular nanorobot work?

The nanorobot functions similarly to a lunar rocket, consisting of two distinct parts: a magnetic propulsion module and a payload capsule. According to the University of Basel team, these modules autonomously self-assemble using a DNA-based “Velcro fastener” made of complementary DNA strands.

The payload capsule contains four enzyme-loaded polymer vesicles. These vesicles protect encapsulated enzymes and allow molecules to enter through pores for processing before releasing products into the environment, according to the researchers.

To ensure the robot reaches its destination, the payload capsule includes biomolecules that facilitate docking onto specific materials or cells. The researchers used this system to target a human cancer cell line known as HeLa cells.

Did You Know? The nanorobots are not constructed from electronics, computer chips, or software, but are instead made from nanoparticles and biomolecules.

What were the results in cancer cell tests?

In laboratory tests, the team loaded the nanorobots with fluorescent molecules to confirm they accumulated on the surface of HeLa cells. Once equipped with specific enzymes, the nanorobots produced an anticancer drug directly at the site.

Like a miniature lunar rocket: Researchers develop modular nanorobot

This targeted approach reduced the viability of the HeLa cells to 16 percent within 72 hours. Dr. Voichita Mihali, the study’s first author, stated that the drug can have a concentrated local effect when specifically targeted to cancer cells.

Expert Insight: Samantha Carter notes that the shift toward modularity is the critical development here. By separating the “engine” from the “cargo,” researchers can potentially swap payloads for different diseases without redesigning the entire delivery vehicle.

How could this technology be used beyond medicine?

The system’s modularity allows it to be adapted for industry and environmental technology. Because the propulsion module is magnetic, the nanorobots can be retrieved and reused after completing a task, such as catalysis, according to the research team.

The University of Basel researchers demonstrated they could separate the modules, refill the payload capsules, and recombine them. This capability suggests the system could be modified for various domains simply by changing the payload capsule.

While human application remains a long-term goal, the project was conducted through the Swiss Nanoscience Institute and the National Center of Competence in Research – Molecular Systems Engineering, in collaboration with Heidelberg University.

Frequently Asked Questions

What materials are used to build these nanorobots?
They are constructed from biomolecules and nanoparticles rather than electronics or computer chips.

How do the two modules of the nanorobot stay together?
They are connected by a DNA-based “Velcro fastener” consisting of complementary DNA strands that allow them to self-assemble in a programmable manner.

What was the specific impact on cancer cells during the study?
The nanorobots produced an anticancer drug that reduced the viability of HeLa cells to 16 percent within a 72-hour period.

How do you think modular nanorobotics could change the future of targeted drug delivery?