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Researchers have developed DNA-based nanorobots that selectively target and destroy cancer cells while leaving healthy tissue unharmed.
In a major advance in nanomedicine, scientists at the Karolinska Institutet in Stockholm created DNA-based nanorobots designed to deliver cancer treatment with exceptional precision. Using a technique known as DNA origami, the researchers built microscopic delivery systems that conceal a cancer-fighting peptide, preventing it from affecting healthy tissue.
The therapeutic peptide is only exposed and activated when the nanorobots encounter the acidic, low-pH environment commonly found in solid tumors. This built-in “kill switch” ensures the treatment is released only at the tumor site, minimizing its impact on normal cells.
In animal studies, the pH-responsive nanorobots reduced breast cancer tumor growth by up to 70% compared with control groups. Because healthy tissue typically maintains a neutral pH of about 7.4, the therapeutic payload remains folded and inactive, helping protect surrounding healthy cells.
Although additional research and clinical trials are needed to evaluate the technology’s safety, toxicity, and effectiveness in humans, the findings represent a significant step forward in cancer research and may contribute to future treatments with fewer body-wide side effects.