06/03/2026
Experts at the Karolinska Institutet, Stockholm created the DNA nanorobots that target cancer — and leave healthy cells entirely undamaged.
In a historic breakthrough for oncology, Swedish researchers have developed a groundbreaking class of DNA nanorobots capable of hunting and destroying cancer cells while leaving healthy tissue completely untouched.
Developed by scientists at the Karolinska Institutet in Stockholm, these microscopic nanodevices utilize 'DNA origami' technology to package a lethal peptide weapon inside a folded DNA structure. Under normal physiological conditions (pH 7.4), the toxic weapon remains completely hidden, preventing the accidental destruction of healthy tissue that typically occurs during traditional cancer treatments. However, once the nanorobots encounter the acidic microenvironment characteristic of solid tumors (pH 6.5), the structure undergoes a conformation change, exposing the peptides to trigger apoptosis—programmed cell death—directly in the targeted cancer cells.
In preclinical trials, the researchers injected these advanced nanorobots into mice bearing human breast cancer tumors, resulting in an impressive 70 percent reduction in tumor growth compared to inactive control groups. Because of their microscopic size, the nanodevices can navigate the body to interact directly and safely with individual cells. While further testing is required in more advanced models to assess human safety and potential side effects, this development marks a massive leap forward in the quest for highly localized, zero-side-effect cancer therapies.
source: Wang, Y., Baars, I., Berzina, I., Rocamonde-Lago, I., Shen, B., Yang, Y., Lolaico, M., Waldvogel, J., Smyrlaki, I., Zhu, K., Harris, R. A., & Högberg, B. A DNA robotic switch with regulated autonomous display of cytotoxic ligand nanopatterns. Nature Nanotechnology, 19(9), 1366–1374.
